Alert archive / Montana / River Flood Warnings / 2011
River Flood Warnings in Montana, May 2011
22 river flood warnings in May 2011. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of river flood warnings reaches back to 2005.
River Flood Warnings by county
Each county as a circle sized by its count in May 2011. Tap one for its archive.
- River Flood Warnings
- 22
- Busiest day
- May 24, 20116 river flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 9:07 AM MDT | River Flood Warning | BYZ | Custer | 9 hr |
| May 20, 11:04 AM MDT | River Flood Warning | BYZ | Big Horn | 6 days |
| May 21, 12:37 AM MDT | River Flood Warning | BYZ | Custer | 59 hr |
| May 21, 8:21 AM MDT | River Flood Warning | GGW | Dawson | 6 days |
| May 21, 8:21 AM MDT | River Flood Warning | GGW | Richland | 7 days |
| May 21, 11:45 PM MDT | River Flood Warning | GGW | Valley | 38 days |
| May 22, 7:42 AM MDT | River Flood Warning | BYZ | Rosebud, Treasure | 7 days |
| May 22, 7:42 AM MDT | River Flood Warning | BYZ | Custer | 7 days |
| May 22, 11:05 AM MDT | River Flood Warning | GGW | Valley | 36 days |
| May 23, 10:06 AM MDT | River Flood Warning | BYZ | Park | 3 days |
| May 24, 2:10 AM MDT | River Flood Warning | GGW | Valley | 32 days |
| May 24, 9:55 AM MDT | River Flood Warning | GGW | Phillips, Valley | 4 days |
| May 24, 10:31 AM MDT | River Flood Warning | TFX | Gallatin | 3 days |
| May 24, 10:31 AM MDT | River Flood Warning | TFX | Beaverhead, Madison | 3 days |
| May 24, 10:31 AM MDT | River Flood Warning | TFX | Cascade | 4 days |
| May 24, 10:31 AM MDT | River Flood Warning | TFX | Lewis and Clark | 4 days |
| May 25, 4:30 PM MDT | River Flood Warning | BYZ | Stillwater, Yellowstone | 20 hr |
| May 26, 2:01 PM MDT | River Flood Warning | BYZ | Rosebud | 69 hr |
| May 28, 10:54 AM MDT | River Flood Warning | GGW | Dawson | 63 hr |
| May 29, 8:22 AM MDT | River Flood Warning | GGW | Richland | 66 hr |
| May 31, 6:04 AM MDT | River Flood Warning | BYZ | Rosebud | 3 days |
| May 31, 12:40 PM MDT | River Flood Warning | GGW | Dawson | 18 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.