Weather alerts in Colorado, 2009
1,778 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 1,778
- Warnings
- 950
- Watches
- 161
- Advisories
- 374
- Busiest month
- July469 alerts
- Busiest day
- June 14, 200956 alerts
Over time
By month
The alerts
1,778 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.
- Weld County255
- Las Animas County219
- Arapahoe County210
- Elbert County208
- Adams County207
- Yuma County203
- Kit Carson County192
- Lincoln County189
- Washington County184
- El Paso County182
- Logan County178
- Morgan County170
- Pueblo County164
- Cheyenne County160
- Douglas County159
- Denver County157
- Huerfano County146
- Baca County141
- Prowers County140
- Sedgwick County139
- Bent County136
- Garfield County133
- Jefferson County131
- Kiowa County127
- Otero County127
- Mesa County126
- Phillips County126
- Larimer County121
- Crowley County121
- Boulder County112
- Broomfield County106
- Fremont County104
- Routt County103
- Moffat County102
- Rio Blanco County98
- Saguache County96
- Montrose County95
- San Miguel County95
- Custer County95
- Gunnison County87
24 more counties
- Delta County86
- Dolores County86
- Teller County86
- Eagle County84
- Montezuma County81
- Pitkin County81
- Park County78
- Gilpin County76
- Costilla County75
- La Plata County72
- Clear Creek County70
- Rio Grande County68
- Conejos County65
- Archuleta County60
- Ouray County56
- Mineral County56
- Hinsdale County55
- Chaffee County53
- Grand County52
- Jackson County49
- San Juan County48
- Alamosa County45
- Lake County44
- Summit County43
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.