Weather alerts in Montana, 2011
2,600 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 2,600
- Warnings
- 939
- Watches
- 232
- Advisories
- 488
- Busiest month
- July711 alerts
- Busiest day
- June 7, 201185 alerts
Over time
By month
The alerts
2,600 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Valley County352
- Phillips County302
- McCone County254
- Garfield County243
- Roosevelt County199
- Petroleum County194
- Stillwater County192
- Dawson County186
- Richland County185
- Rosebud County181
- Carter County181
- Missoula County174
- Sweet Grass County170
- Custer County170
- Flathead County160
- Wibaux County159
- Sheridan County154
- Prairie County150
- Big Horn County150
- Daniels County147
- Granite County145
- Powder River County141
- Park County140
- Fallon County139
- Lake County139
- Carbon County135
- Ravalli County134
- Yellowstone County133
- Treasure County131
- Golden Valley County122
- Sanders County122
- Powell County120
- Musselshell County118
- Wheatland County111
- Cascade County106
- Fergus County104
- Deer Lodge County91
- Blaine County91
- Silver Bow County86
- Judith Basin County85
The busiest days
Days with the most alerts issued, by UTC date.
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. Rebuilt daily.