Is An Inch Of Rain In 24 Hours A Lot

Is An Inch Of Rain In 24 Hours A LotIs An Inch Of Rain An Hour A Lot? An inch of rain an hour is not a lot, but if it is a consistent rain then it can add up. 5 Inches of Rain in 24 Hours: Blessing or Curse? Reader Contribution by Blythe Pelham To be honest, we fell just short of five inches. The highest rain rate I've recorded is 9. Compare that to a daily total of 2. 28 inches – was set on Nov. For long periods of time, there would be deep standing water. But an inch of rain doesn't sound that bad. Half of that is half an inch. 25) of an inch of rain. Yet if eight to 10 inches pours down in a hour or two, roads usually are severely flooded and canals overflow. The forecast calls for up to 4 inches by Thursday morning. 3 inches per hour July 21, 2006. 10 inch per hour; moderate, 0. 5 Inches of Rain in 24 Hours: Blessing or Curse? Reader Contribution by Blythe Pelham To be honest, we fell just short of five inches. 3 inches per hour July 21, 2006. It is possible to have rain drops within drizzle! Slight rain: Less than 0. 30 inches per hour or 0. Generally speaking, any rain that exceeds 0. Moderate rain: Greater than 0. Rain Rate Visualizer Rivers and Lakes Climate and Past Weather Local Programs This is a collection of video clips showing rain at different hourly rainfall rates. Half of that is half an inch. So if you had 300 mm in April, take 360 mm/(30 days * 24 hours) = 0. 5 Inches of Rain in 24 Hours: Blessing or Curse? Reader Contribution by Blythe Pelham To be honest, we fell just short of five inches. That's a lot of runoff!. 75) of an inch of rain – A light moderate rain never reaches this amount, heavy rain lasting for 2-4 hours. Greatest rainfall in 24 hours The biggest rainfall in a day occurred with the passage of Cyclone Denise in Foc-Foc, La Réunion, an island in the southern Indian Ocean. If you measure once per day at midnight, Tuesday might have 1 inch and Wednesday might have 5 inches, because the rain started at 9 pm on Tuesday. Is 1 inch of rain in 24 hours a lot? Small puddles would form but usually disappear after a short while. Storm Center 7 tracked the amount of rainfall as of 11:40 a. The county received about a half inch of rain over a 48 hour period. I'd say anything over 2" (50mm) in 24 hours is fairly rare for a given location away from hilly or mountainous areas in the UK. Yet if eight to 10 inches pours down in a hour or two. Thus, each inch in the tube is equivalent to 0. Storm Center 7 tracked the amount of rainfall as of 11:40 a. 30 inches per hour, or 4 inches per day. 24, 2002, about two inches of rainfall fell in the Peachtree Creek watershed. Is 1 inch of rain in 24 hours a lot? It depends on the context. A rain gauge is a tool used to measure precipitation. The height of the water is measured and reported as rainfall. But now the measurements are fully automatic, so the meteorological service gets the data more often and can provide data for each hour of the day. 8 inches) of rain fell over 24 hours, from January 7 to 8, 1966. In general, two or three inches of rain per hour creates only minor street flooding. Very heavy rain: Greater than 8 mm per hour. But if you measure once per hour, you can say that the 24-hour period starting at 9pm on Tuesday had 6 inches of rain. This is why Silver Lake, CO still holds its 1921 record for 76 inches of snow in a 24-hour period, since in 1997 Montague, NY's 77 inches was measured six times. Heavy rain is more than 0. 28 inches – was set on Nov. Los Angeles, California - Last 24 Hours - The Weather Network 36 Hours Weekend 7 Days 14 Days Monthly Los Angeles, CA Overcast 55 °F Feels like 55 Fri Morning A mix. 24 th and the continuous measure of streamflow, in cubic feet per second (ft 3 /s). 5 Inches of Rain in 24 Hours: Blessing or Curse? Reader Contribution by Blythe Pelham To be honest, we fell just short of five inches. This makes it easier to read accurately! My gauge is old. com What is a light rain called?. 69 inches of rain fell at Waipā Garden on the island of Kauai. For example, if one inch of rainfall falls in a 24-hour period, that would be considered a lot. gallon of pure water is about 8. How far does 1 inch of rain penetrate the ground? between 6 and 15 inches One inch of water should penetrate the soil somewhere between 6 and 15 inches deep. So, an inch of water over an acre is a lot and spread out over the entire South it is rather significant. Greatest rainfall in 24 hours The biggest rainfall in a day occurred with the passage of Cyclone Denise in Foc-Foc, La Réunion, an island in the southern Indian. 25) of an inch of rain – A light rain for 2-3 hours, moderate rain for 30-60 minutes or heavy rain for 15 minutes. 5) of an inch of rain Some 1. And Skyline Boulevard received about three-quarters of an inch of rain. Check out the 24-hour rainfall reports! Several locations received more than an inch! http://ow. Is an inch of rain a lot? Light rainfall is considered less than 0. No, that's a nice steady drizzle. An inch of rain in New York City would equate to more than 5. In general, however, most places see around 40-50 inches of rain each year. What is considered a lot of rain in an hour? Light rainfall is considered less than 0. Is an inch of rain a lot? Light rainfall is considered less than 0. 10 inches of rain per hour. Other areas of the country may experience higher totals in a day; for example, Florida and parts of the Gulf Coast may see up to 5 inches or even more in a 24-hour period. Moderate rainfall measures 0. Labels vary for restrictions of watering and/or precipitation. The 3 inches at. Roughly equivalent to 0. Heavy rain is more than 0. Additionally, some areas experience flash floods if the rainfall rate is much greater than. Rain is classified as light, meaning rain falling at a rate between a trace and 0. The standard rain gauge has a cylindrical container that collects the water as it rains. The standard way of measuring rainfallor snowfall is the standard raingauge, which can be found in 100–mm(4-in) plastic and 200-mm(8-in) metal varieties. The next time you receive measurable precipitation, you can go to the US. In some areas, 1 inch of rain is a lot, while in other areas, 1 inch of rain is not a lot. Further, 1mm of rain is also equivalent to about 1 inch of snowfall. So if you had 300 mm in April, take 360 mm/(30 days * 24 hours) = 0. Considering the Earth's surface area, that means approximately 990 mm (39 in) of precipitation globally each year. Total rainfall is still measured from 0900 to the next day at 0900. In this way, What is heavy rainfall? Extremeweather – heavy rainfall. One inch of rain falling on 1 acre of ground is equal to about 27,154 gallons and weighs about 113 tons. The highest rainfall in a day doesn't necessarily equate to it being the most intense. Greatest rainfall in 24 hours The biggest rainfall in a day occurred with the passage of Cyclone Denise in Foc-Foc, La Réunion, an island in the southern Indian Ocean. Light rain will wet the detergents deposited from gasoline and cause the accumulated oil from the roads to float. 00) inch of rain – A light moderate rain never reaches this amount, heavy rain for several hours (2-5 hours). It is possible to have rain drops within drizzle! Slight rain: Less than 0. Most materials are completely effective if they have a chance to dry on the leaf tissue. Now look at how long it is from the tip of it to the first joint. 00) inch of rain – A light moderate rain never reaches this amount, heavy rain for several hours (2. The inner tube’s diameter is just small enough to make the depth of rain ten times what it would be in a gauge without the tube and funnel. 1" (28mm) fell in one hour. Hawaii has the most extreme 24-hour rainfall total on record for all 50 states. 10 inches per hour or 0. If you capture the rainfall runoff from a storm that just produces 1/10th of an inch of rain onto a 20 by 30 foot roof, you end up with a full 32-gallon container full of water, with 5 gallons left over. The highest rain rate I've recorded is 9. Rainfall amount is described as the depth of water reaching the ground, typically in inches or millimeters (25 mm equals one inch). 10 inch per hour; moderate, 0. An inch of rain is exactly that, water that is one inch deep. 00) inch of rain – A light moderate rain never reaches this amount, heavy rain for several hours (2-5. Good for the crops, it will soak in rather than run off. A light rain might look like a mist, while a heavy rain might be a downpour. If the container is the size of a small town (100 square miles), then 2 inches of rain is enough water to fill 26 olympic sized pools. The precipitation rate is generally considered light , moderately or heavily described. Moderate precipitation measures 0. Is there an upper bound to the amount of rain that can fall?. Records for 24-hour rainfall in the United States range from less than 6 inches to more than 4 feet, according to NOAA. Is 1 inch of rain in 24 hours a lot? Small puddles would form but usually disappear after a short while. 00) inch of rain – A light moderate rain never reaches this amount, heavy rain for several hours (2-5 hours). A rain gauge is a tool used to measure precipitation. Is 1 inch of rain in a day a lot? One (1. The next time you receive measurable precipitation, you can go to the US Geological Survey’s rainfall calculator and see for yourself how much water actually fell on the area you’re inputting. Is 1 inch of rain in 24 hours a lot? Small puddles would form but usually disappear after a short while. Totals decreased south of the Golden Gate. Two inches overnight in March flooded local parkways. The North Bay saw the most rainfall, with many gauges recording over a half inch. Also, Is 1 to 2 inches of rain a lot? 1/2 (0. 76" (248mm) / hour but the total rain for that day was a mere 1. using varying weather service agencies: Montgomery County. The inner tube’s diameter is just small enough to make the depth of rain ten times what it would be in a gauge without the tube and funnel. Records for 24-hour rainfall in the United States range from less than 6 inches to more than 4 feet, according to NOAA. Records for 24-hour rainfall in the United States range from less than 6 inches to more than 4 feet, according to NOAA. Is 1 inch of rain in 1 hour a lot? Light rainfall is considered less than 0. 4 pounds, it follows that the weight of a uniform coating of 1 inch of rain over 1 acre of surface would be 226,512 pounds or about 113 short tons. An inch of snow falling evenly on 1 acre of ground is equivalent to about 2,715 gallons of water. Is 10 mm of rain in 24 hours a lot? Equivalent to about 0. If the weather service verifies that rainfall total, it would break the state’s 24-hour rain record by 2. Generally speaking, any rain that exceeds 0. How Long Does It Take To Rain 1 Inch? It takes about 1 hour to rain 1 inch. Hawaii has the most extreme 24-hour rainfall total on record. 30 inches in a one hour period is considered heavy rain. Rainfall rate is generally described as light, moderate or heavy. 8 inches) of rain fell over 24 hours, from January 7 to 8, 1966. View complete answer on weatherins. How much is an inch of rain? One inch of rain falling on one acre of ground is equal to about 27,154 gallons and weighs about 113 tons. 05 inches per hour Note, the rates associated with these videos were calculated based on the total rain accumulated in a 10 minute window centered at the time of the video, then multiplied by 6 to come up with a 60 minute (1 hour) rate. It is possible to have rain drops within drizzle! Slight rain: Less than 0. There is still tremendous need for water in the ground but it happens 1 inch at a time. This is the equivalent of 3,630 cubic feet. This will depend on how cold it is, but on average 10 inches of snow = 1 inch of rain, so 0. If the preliminary report of 25. An inch of rain is exactly that, water that is one inch deep. 1/2 inch of rain over 8 hours isn't much of anything. As for the rest Damp - up to 0. 91 inches measured at a station at the Fort Lauderdale-Hollywood Airport is verified, it would break the state's 24-hour rain record. 30 inches in a one hour period is considered heavy rain. In August, Tennessee shattered its previous state record after 17 inches of rain fell in the town of McEwen in just 24 hours. 5 mm per hour, but less than 4. 1 inches (a tenth of an inch) of rainfall. Labels vary for restrictions of watering and/or precipitation. Greatest rainfall in 24 hours. Is an inch of rain a lot? Light rainfall is considered less than 0. Light rainfall is considered less than 0. 75) inch of rain - This amount is never reached by a light moderate rain, with heavy rain lasting 2-4 hours. A little over a week later, remnants of Hurricane Ida brought. By midday Thursday, the rain should clear but King said. Alexa Ruiz Check out 7 similar earth and weather calculators 🌎 Antipode Azimuth Earthquake … 4 more. 30 inches of rain per hour. Heavy rainfall is more than 0. Greatest rainfall in 24 hours The biggest rainfall in a day occurred with the passage of Cyclone Denise in Foc-Foc, La Réunion, an island in the southern Indian Ocean. NWS meteorologist Alexis Clouser said it rained more than 31. 5 mm/hour average monthly intensity. 10 inches of rain per hour. Moderate rainfall measures 0. Therefore, 1mm of rain is a significant amount of precipitation and can have an impact on the environment. Records for 24-hour rainfall in the United States range from less than 6 inches to more than 4 feet, according to NOAA's State Climate Extremes Committee. Records for 24-hour rainfall in the United States range from less than 6 inches to more than 4 feet, according to NOAA's State Climate Extremes Committee. I'd say anything over 2" (50mm) in 24 hours is fairly rare for a given location away from hilly or mountainous areas in the UK. 30 inch per hour; heavy, more than 0. 1" (28mm) fell in one hour. If a particular area receives more than 4 inches of rain over the course of a 24-hour period, then that is considered to be heavy rain. The chart below shows rainfall, in inches, during each 15-minute increment on Dec. If the container is 1 square inch, then 2 inches of rain is 2 cubic inches of water. If the weather service verifies that rainfall total, it would break the state’s 24-hour rain record by 2. Is 1 inch of rain in 1 hour a lot? Light rainfall is considered less than 0. Further, 1mm of rain is also equivalent to about 1 inch of snowfall. Slight shower: Less than 2 mm per hour. 30 inches of rain per hour. 24 inches of rain in Newark — nearly an inch more rain than the previous hourly record in 2006. A typical outdoor trash can holds 32 gallons. In many parts of the United States, 1 inch of rain in a 24-hour period is considered a moderate amount of precipitation. Moderate Rain: 0. Moderate precipitation measures 0. But if one inch of rainfall falls over the course of a month, that would be considered a little bit. It is defined as rainfallgreater than 100 mm in 24 hours. Here are a few rainfall totals from the past 24 hours: San Jose: 0. 19 inches at the San Francisco International Airport, or 157% over normal for the water year that is recorded from October to. Also, the person measuring may only measure four times in a 24-hour period, at least as far as National Weather Service records are concerned. Further, 1mm of rain is also equivalent to about 1 inch of snowfall. 76" (248mm) / hour but the total rain for that day was a mere 1. 25) of an inch of rain. The highest rainfall in a day doesn't necessarily equate to it being the most intense. 24 inches of rain in Newark — nearly an inch more rain than the previous hourly record in 2006. It is possible to have rain drops within drizzle! Slight rain: Less than 0. See MetService’s Severe Weather Criteria Chart. If the container is 1 square foot, then 2 inches of rain is 288 cubic inches of water. The North Bay saw the most rainfall, with many gauges recording over a half inch. That was recently set April 14-15, 2018 when 49. 12 inch Butler County. The answer is definitely "yes". 10 inches of rain per hour. The warmer the temperature and the lower the humidity, the quicker this happens. Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. 1 day ago · Storm Center 7 tracked the amount of rainfall as of 11:40 a. How much rain does it take to cause flooding? In general, two or three inches of rain per hour creates only minor street flooding. How many inches of rain does it take to cause a flood? In general, two or three inches of rain per hour creates only minor street flooding. If the preliminary report of 25. 30 inches or more per hour or in 6 minutes. Rain is classified as light, meaning rain falling at a rate between a trace and 0. The biggest rainfall in a day occurred with the passage of Cyclone Denise in Foc-Foc, La Réunion, an island in the southern Indian Ocean. As a cubic foot of pure water weighs about 62. And Skyline Boulevard received about three-quarters of an inch of rain. The weather forecast states that after a day's worth of heavy showers, rain amounts will total around an inch when all is said and done. Heavy rain is typically defined as rain that falls at a rate of at least 0. That's enough to fill approximately 2. 75) of an inch of rain - A light moderate rain never reaches this amount, heavy rain lasting for 2-4 hours. 8 inches of rain in 24 hours; that’s no drizzle. There would be deep standing water for long periods of time. In less than 24 hours, more than 25 inches of rain fell at the Fort Lauderdale Airport on April 13—@NWS deemed it a once-in-a-thousand-year event. One inch of rainfall is a lot in some cases, but not in all cases. An inch of snow falling evenly on 1 acre of ground is. Generally, 1 inch of rain in 24 hours is not considered an unusually large amount of rainfall. Very heavy rain: Greater than 8 mm per hour. The weather forecast states that after a day's worth of heavy showers, rain amounts will total around an inch when all is said and done. 30 inches of rain per hour. Moderate rain: Greater than 0. Is there an upper bound to the amount of rain that can fall?. 91 inches measured at a station at the Fort Lauderdale-Hollywood Airport is verified, it would break the state's 24-hour rain record by 2. The weather forecast states that after a day's worth of heavy showers, rain amounts will total around an inch when all is said and done. The meteorologist seems to be stressing that this inch of rain will not bode well for outdoor work. You’ve got your decimal point wrong; 1mm over 1 sq m is a litre, 10 mm gives 10 litres. You got your decimal point wrong; 1 mm in 1 m² is one liter, 10 mm equals 10 liters. If you knew it rained on only 10 days, the average rate on those days would be 1. 4 inches for an 8-hour period, but this is a very. 5 mm/hour average monthly intensity. How Much Rain Is 1Mm Per Hour? Rates of rainfall: Heavy (thick) drizzle: Impairs visibility and is measurable in a raingauge, rates up to 1 mm per hour. Check out the 24-hour rainfall reports! Several locations received more than an inch! http://ow. Is 10 mm of rain in 24 hours a lot? Equivalent to about 0. NWS meteorologist Alexis Clouser said it rained more than 31. Slight shower: Less than 2 mm per hour. The county received about a half inch of rain over a 48 hour period. How far does 1 inch of rain penetrate the ground?. 8 inches of rain in 24 hours; this is not a drizzle. 75) inch of rain – This amount is never reached by a light moderate rain, with heavy rain lasting 2-4 hours. 8 inches of rain in 24 hours; this is not a drizzle. Either way, you would like to know how much rain has fallen—how many gallons have come down from the skies onto your roof, yard, block, or town. In general, two or three inches of rain per hour creates only minor street flooding. But an inch of rain doesn't sound that bad. Moderate rain: Greater than 0. There is still tremendous need for water in the ground but it happens 1 inch at a time. 30 inch per hour; heavy, more than 0. Is a quarter inch of rain in a day a lot? A light rain for 2-3 hours, moderate rain for 30-60 minutes, or heavy rain for 15 minutes - 1/4 (0. Hawaii has the most extreme 24-hour rainfall total on record for all 50 states. 2 inches of rain, enough to fill around 352 billion bottles of water. The roof of a house averages 3,000 square feet, therefore 1 inch of rain on a roof produces 1,869 gallons of water. That’s when the National Weather Service issues flash flood warnings. Is a quarter inch of rain in a day a lot? A light rain for 2-3 hours, moderate rain for 30-60 minutes, or heavy rain for 15 minutes – 1/4 (0. Check out the 24-hour rainfall reports! Several locations received more than an inch! http://ow. Is 1 inch of rain in 24 hours a lot? It depends on the context. 30 inches in 6 minutes. Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. What does that mean? It depends how fast it falls. Is an inch of rain a lot? Light rainfall is considered less than 0. You might even want to know how many baths you could get from your rainstorm? In the form below, choose an area(s) and a rainfall amount to see how many gallons of water fell from the sky onto that. No, that's a nice steady drizzle. Civilians have been killed in a wave of attacks overnight on cities, populated areas and military positions, the Ukrainian army has said. 3/4 (0. An inch of rain is exactly that, water that is one inch deep. The next time you receive measurable precipitation, you can go to the US Geological Survey’s rainfall calculator and see for yourself how much water actually fell on the area you’re inputting. 4 inches for an 8-hour period, but this is a very broad measurement and what constitutes “heavy” can vary drastically depending on the environment it is happening in. Multiply that by 12 inches of rain and you get 22,000 gallons of water running off my roof in the last couple of weeks. 5mm) Wet - up to 1" (25mm) Very Wet - up to 2" (50mm) Extremely Wet - up to 3" (75mm) Exceptionally Wet - over 3" (75mm) Once in a lifetime - over 4" (100mm). If the weather service verifies that rainfall total, it would break the state’s 24-hour rain record by 2. Between 8 p. An inch of rain an hour is not a lot, but if it is a consistent rain then it can add up. Hawaii has the most extreme 24-hour. Light rainfall is considered less than 0. In less than 24 hours, more than 25 inches of rain fell at the Fort Lauderdale Airport on April 13—@NWS deemed it a once-in-a-thousand-year event. Yet if eight to 10 inches pours down in a hour or two, roads usually are. Records for 24-hour rainfall in the United States range from less than 6 inches to more than 4 feet, according to NOAA's State Climate Extremes Committee. com What is a light rain called?. Generally, 1 inch of rain in 24 hours is not considered an unusually large amount of rainfall. One inch of rain over 1,000 square feet of surface is 623 gallons of water. Civilians have been killed in a wave of attacks overnight on cities, populated areas and military positions, the Ukrainian army has said. And Skyline Boulevard received about three-quarters of an inch of rain. If you measure once per day at midnight, Tuesday might have 1 inch and Wednesday might have 5 inches, because the rain started at 9 pm on Tuesday. One inch of rain falling on 1 acre of ground is equal to about 27,154 gallons and weighs about 113 tons. This will depend on how cold it is, but on average 10 inches of snow = 1 inch of rain, so 0. The highest rainfall in a day doesn't necessarily equate to it being the most intense. What is the fastest way for water to reach a river?. Is an inch of rain a lot? Light rainfall is considered less than 0. The county received about a half inch of rain over a 48 hour period. This is the equivalent of 3,630 cubic feet. 25) of an inch of rain - A light rain for 2-3 hours, moderate rain for 30-60 minutes or heavy rain for 15 minutes. The meteorologist seems to be stressing that this inch of rain will not bode well for outdoor work. Rainfall amount is described as the depth of water reaching the ground, typically in inches or millimeters (25 mm equals one inch). 00) inch of rain - A light moderate rain never reaches this amount, heavy rain for several hours (2-5 hours). It could be less than in inch of wet snow, or more. For the record, heavy rain is defined as rainfall that exceeds 0. Also, the person measuring may only measure four times in a 24-hour period, at least as far as National Weather Service records are concerned. Rainfall rate is generally described as light, moderate or heavy. In many parts of the United States, 1 inch of rain in a 24-hour period is considered a moderate amount of precipitation. Keep in mind, just because the rain is described as light doesn't keep it from being dangerous. In most cases, an inch of rain is a lot. 10 inches in 6 minutes. Light rainfall is considered less than 0. This is intended to help everyone better understand what to expect when we forecast specific values of rainfall rates. Does that look like a lot? More posts you may like r/AskReddit Join • 16 days ago. Is 1 inch of rain in 1 hour a lot? Light rainfall is considered less than 0. Is 1 inch of rain in 24 hours a lot? Small puddles would form but usually disappear after a short while. We’ve seen materials dry within as little as 15 minutes. By midday Thursday, the rain should clear but King said. 8 inches) of rain fell over 24 hours, from January 7 to 8, 1966. Records for 24-hour rainfall in the United States range from less than 6 inches to more than 4 feet, according to NOAA. 19 inches at the San Francisco International Airport, or 157% over normal for the water year that is recorded from October to. Consequently, a rainfall of 1 inch over 1 acre of ground could mean a total of 6,272,640 cubic inches of water. Sources/Usage: Some content may have restrictions. The county received about a half inch of rain over a 48 hour period. Which Rain Is Heaviest?. Civilians have been killed in a wave of attacks overnight on cities, populated areas and military positions, the Ukrainian army has said. There is no standard answer to this question as it can vary depending on where you live. For the record, heavy rain is defined as rainfall that exceeds 0. 3 inches per hour. Is An Inch Of Rain In An Hour Alot? An inch of rain in an hour is a lot. 75) of an inch of rain – A light moderate rain never reaches this amount, heavy rain lasting for 2-4 hours. Hawaii has the most extreme 24-hour rainfall total on record. What Does An Inch Of Rain Look Like? It depends on the type of rain. Consequently, a rainfall of 1 inch over 1 acre of ground could mean a total of 6,272,640 cubic inches of water. using varying weather service agencies: Montgomery County. Heavy rainfall is more than 0. Civilians have been killed in a wave of attacks overnight on cities, populated areas and military positions, the Ukrainian army has said. Light precipitation is considered less than 0. So if you had 300 mm in April, take 360 mm/(30 days * 24 hours) = 0. Generally speaking, any rain that exceeds 0. 91 inches measured at a station at the Fort Lauderdale-Hollywood Airport is verified, it would break the state's 24-hour rain record by 2. So, an inch of water over an acre is a lot and spread out over the entire South it is rather significant. Therefore, 1mm of rain is a significant amount of precipitation and can have an impact on the environment. 25) of an inch of rain – A light rain for 2-3 hours,. It is normally measured in 24 hours and is measured each morning at a fixed time like 0900. Yet if eight to 10 inches pours down in a hour or two, roads usually are severely flooded and canals overflow. Moderate rainfall measures 0.