Multi-Radar Multi-Sensor System (MRMS)
NOAA National Severe Storms Laboratory (NSSL); Cooperative Institute for Severe and High-Impact Weather Research and Operations (CIWRO); NOAA National Weather Service National Centers for Environmental Prediction (NCEP)
The Multi-Radar Multi-Sensor (MRMS) system combines data streams from multiple radars, satellites, surface observations, upper air observations, lightning reports, rain gauges, and numerical weather prediction models to produce a suite of decision-support products every two minutes. Because it provides better depictions of high-impact weather events such as heavy rain, snow, hail, tornadoes, and other threats, forecasters can quickly diagnose severe weather and issue more accurate and earlier forecasts and warnings.
The MRMS system was developed to produce severe weather, transportation, and precipitation products for improved decision-making capability to improve hazardous weather forecasts and warnings, along with hydrology, aviation, and numerical weather prediction.
The MRMS system was jointly developed by the NOAA National Severe Storms Laboratory (NSSL) and the Cooperative Institute for Severe and High-Impact Weather Research and Operations (CIWRO; formerly CIMMS). MRMS was deployed operationally in 2014 at the National Weather Service's National Centers for Environmental Prediction (NCEP).
This map shows precipitation for the past 7 days as a percentage of "normal" (average) conditions for the same time period from 1991–2020. Green/blue shades indicate above-normal precipitation, while brown shades indicate below-normal precipitation.
To calculate percentage of normal precipitation, MRMS precipitation data across a given time period is compared with the U.S. 1991–2020 daily gridded climate normals for the same date range to display the percent deviation of recent conditions relative to the standardized 30-year average.
This map shows precipitation for the past 30 days as a percentage of "normal" (average) conditions for the same time period from 1991–2020. Green/blue shades indicate above-normal precipitation, while brown shades indicate below-normal precipitation.
To calculate percentage of normal precipitation, MRMS precipitation data across a given time period is compared with the U.S. 1991–2020 daily gridded climate normals for the same date range to display the percent deviation of recent conditions relative to the standardized 30-year average.
This map shows precipitation for the past 60 days as a percentage of "normal" (average) conditions for the same time period from 1991–2020. Green/blue shades indicate above-normal precipitation, while brown shades indicate below-normal precipitation.
To calculate percentage of normal precipitation, MRMS precipitation data across a given time period is compared with the U.S. 1991–2020 daily gridded climate normals for the same date range to display the percent deviation of recent conditions relative to the standardized 30-year average.
This map shows precipitation for the past 90 days as a percentage of "normal" (average) conditions for the same time period from 1991–2020. Green/blue shades indicate above-normal precipitation, while brown shades indicate below-normal precipitation.
To calculate percentage of normal precipitation, MRMS precipitation data across a given time period is compared with the U.S. 1991–2020 daily gridded climate normals for the same date range to display the percent deviation of recent conditions relative to the standardized 30-year average.
| Range | Map Hex Color | Description |
|---|---|---|
| 0% - 25% | #8c510a | Precipitation was only 0% to 25% of the historical average for this location, compared to the same date range from 1991–2020. |
| 25% - 50% | #bf812d | 25%–50% of Normal Precipitation was 25% to 50% of the historical average for this location, compared to the same date range from 1991–2020. |
| 50% - 75% | #dfc27d | 50%–75% of Normal Precipitation was 50% to 75% of the historical average for this location, compared to the same date range from 1991–2020. |
| 75% - 100% | #f6e8c3 | 75%–100% of Normal Precipitation was 75% to 100% of the historical average for this location, compared to the same date range from 1991–2020. |
| Range | Map Hex Color | Description |
|---|---|---|
| 100% - 150% | #c7eae5 | 100%–150% of Normal Precipitation was 100% to 150% of the historical average for this location, compared to the same date range from 1991–2020. |
| 150% - 200% | #80cdc1 | 150%–200% of Normal Precipitation was 150% to 200% of the historical average for this location, compared to the same date range from 1991–2020. |
| 200% - 300% | #35978f | 200%–300% of Normal Precipitation was 200% to 300% of the historical average for this location, compared to the same date range from 1991–2020. |
| 300% - | #01665e | >300% of Normal Precipitation was greater than 300% of the historical average for this location, compared to the same date range from 1991–2020. |
| Range | Map Hex Color | Description |
|---|---|---|
| 0% - 25% | #8c510a | Precipitation was only 0% to 25% of the historical average for this location, compared to the same date range from 1991–2020. |
| 25% - 50% | #bf812d | 25%–50% of Normal Precipitation was 25% to 50% of the historical average for this location, compared to the same date range from 1991–2020. |
| 50% - 75% | #dfc27d | 50%–75% of Normal Precipitation was 50% to 75% of the historical average for this location, compared to the same date range from 1991–2020. |
| 75% - 100% | #f6e8c3 | 75%–100% of Normal Precipitation was 75% to 100% of the historical average for this location, compared to the same date range from 1991–2020. |
| Range | Map Hex Color | Description |
|---|---|---|
| 100% - 150% | #c7eae5 | 100%–150% of Normal Precipitation was 100% to 150% of the historical average for this location, compared to the same date range from 1991–2020. |
| 150% - 200% | #80cdc1 | 150%–200% of Normal Precipitation was 150% to 200% of the historical average for this location, compared to the same date range from 1991–2020. |
| 200% - 300% | #35978f | 200%–300% of Normal Precipitation was 200% to 300% of the historical average for this location, compared to the same date range from 1991–2020. |
| 300% - | #01665e | >300% of Normal Precipitation was greater than 300% of the historical average for this location, compared to the same date range from 1991–2020. |
| Range | Map Hex Color | Description |
|---|---|---|
| 0% - 25% | #8c510a | Precipitation was only 0% to 25% of the historical average for this location, compared to the same date range from 1991–2020. |
| 25% - 50% | #bf812d | 25%–50% of Normal Precipitation was 25% to 50% of the historical average for this location, compared to the same date range from 1991–2020. |
| 50% - 75% | #dfc27d | 50%–75% of Normal Precipitation was 50% to 75% of the historical average for this location, compared to the same date range from 1991–2020. |
| 75% - 100% | #f6e8c3 | 75%–100% of Normal Precipitation was 75% to 100% of the historical average for this location, compared to the same date range from 1991–2020. |
| Range | Map Hex Color | Description |
|---|---|---|
| 100% - 150% | #c7eae5 | 100%–150% of Normal Precipitation was 100% to 150% of the historical average for this location, compared to the same date range from 1991–2020. |
| 150% - 200% | #80cdc1 | 150%–200% of Normal Precipitation was 150% to 200% of the historical average for this location, compared to the same date range from 1991–2020. |
| 200% - 300% | #35978f | 200%–300% of Normal Precipitation was 200% to 300% of the historical average for this location, compared to the same date range from 1991–2020. |
| 300% - | #01665e | >300% of Normal Precipitation was greater than 300% of the historical average for this location, compared to the same date range from 1991–2020. |
| Range | Map Hex Color | Description |
|---|---|---|
| 0% - 25% | #8c510a | Precipitation was only 0% to 25% of the historical average for this location, compared to the same date range from 1991–2020. |
| 25% - 50% | #bf812d | 25%–50% of Normal Precipitation was 25% to 50% of the historical average for this location, compared to the same date range from 1991–2020. |
| 50% - 75% | #dfc27d | 50%–75% of Normal Precipitation was 50% to 75% of the historical average for this location, compared to the same date range from 1991–2020. |
| 75% - 100% | #f6e8c3 | 75%–100% of Normal Precipitation was 75% to 100% of the historical average for this location, compared to the same date range from 1991–2020. |
| Range | Map Hex Color | Description |
|---|---|---|
| 100% - 150% | #c7eae5 | 100%–150% of Normal Precipitation was 100% to 150% of the historical average for this location, compared to the same date range from 1991–2020. |
| 150% - 200% | #80cdc1 | 150%–200% of Normal Precipitation was 150% to 200% of the historical average for this location, compared to the same date range from 1991–2020. |
| 200% - 300% | #35978f | 200%–300% of Normal Precipitation was 200% to 300% of the historical average for this location, compared to the same date range from 1991–2020. |
| 300% - | #01665e | >300% of Normal Precipitation was greater than 300% of the historical average for this location, compared to the same date range from 1991–2020. |
This map shows precipitation for the past 7 days as a percentage of "normal" (average) conditions for the same time period from 1991–2020. Green/blue shades indicate above-normal precipitation, while brown shades indicate below-normal precipitation.
To calculate percentage of normal precipitation, MRMS precipitation data across a given time period is compared with the U.S. 1991–2020 daily gridded climate normals for the same date range to display the percent deviation of recent conditions relative to the standardized 30-year average.
This map shows precipitation for the past 30 days as a percentage of "normal" (average) conditions for the same time period from 1991–2020. Green/blue shades indicate above-normal precipitation, while brown shades indicate below-normal precipitation.
To calculate percentage of normal precipitation, MRMS precipitation data across a given time period is compared with the U.S. 1991–2020 daily gridded climate normals for the same date range to display the percent deviation of recent conditions relative to the standardized 30-year average.
This map shows precipitation for the past 60 days as a percentage of "normal" (average) conditions for the same time period from 1991–2020. Green/blue shades indicate above-normal precipitation, while brown shades indicate below-normal precipitation.
To calculate percentage of normal precipitation, MRMS precipitation data across a given time period is compared with the U.S. 1991–2020 daily gridded climate normals for the same date range to display the percent deviation of recent conditions relative to the standardized 30-year average.
This map shows precipitation for the past 90 days as a percentage of "normal" (average) conditions for the same time period from 1991–2020. Green/blue shades indicate above-normal precipitation, while brown shades indicate below-normal precipitation.
To calculate percentage of normal precipitation, MRMS precipitation data across a given time period is compared with the U.S. 1991–2020 daily gridded climate normals for the same date range to display the percent deviation of recent conditions relative to the standardized 30-year average.
MRMS precipitation maps are updated daily on Drought.gov, with data valid through 7 a.m. Eastern that morning.
MRMS precipitation maps are updated daily on Drought.gov, with data valid through 7 a.m. Eastern that morning.
MRMS precipitation maps are updated daily on Drought.gov, with data valid through 7 a.m. Eastern that morning.
MRMS precipitation maps are updated daily on Drought.gov, with data valid through 7 a.m. Eastern that morning.
Access
MRMS Operational Product Viewer: Interactive map viewer that displays a rolling archive of real-time operational MRMS products dating back to October 2020.
Data Download: Operational MRMS products are available in realtime from NCEP via HTTP and LDM in GRIB2 format.
- HTTP: https://mrms.ncep.noaa.gov/data/
- LDM: Contact NCEP Central Operations at idp-support@noaa.gov using “MRMS Data Request” in your subject line. Provide your IP address and contact name, phone number, and email address.
