Weather alerts in Jefferson County, Iowa

2,967 weather alerts since 1986, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Jefferson County and its neighbors

Each county as a circle sized by its count since 1986. Tap one for its archive.

Alerts: 2,967
Warnings: 602
Watches: 641
Advisories: 678
Busiest year: 2010204 alerts
Average year: 78over 38 years on file

Over time

By year

Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.

By month of the year

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	330
Tornado Warning	33
Severe Thunderstorm Watch	274
Tornado Watch	127
Mesoscale Discussion	770
Special Weather Statement	276
Flooding
Areal Flood Warning	11
Flash Flood Warning	60
River Flood Warning	4
Flash Flood Watch	107
Flood Watch	34
River Flood Advisory	2
Winter
Blizzard Warning	8
Ice Storm Warning	9
Snow Squall Warning	1
Winter Storm Warning	39
Blizzard Watch	3
Winter Storm Watch	51
Blowing Snow Advisory	3
Freezing Rain Advisory	8
Snow Advisory	10
Snow and Blowing Snow Advisory	4
Winter Weather Advisory	138
Heat
Excessive Heat Warning	16
Extreme Heat Warning	4
Excessive Heat Watch	9
Extreme Heat Watch	4
Heat Advisory	103
Cold
Extreme Cold Warning	2
Freeze Warning	47
Wind Chill Warning	8
Extreme Cold Watch	2
Freeze Watch	12
Wind Chill Watch	4
Cold Weather Advisory	10
Frost Advisory	33
Wind Chill Advisory	75
Wind and dust
High Wind Warning	7
High Wind Watch	6
Wind Advisory	107
Fire
Red Flag Warning	23
Fire Weather Watch	8
Fog and smoke
Air Stagnation Advisory	1
Dense Fog Advisory	182
Freezing Fog Advisory	2

The latest warnings

The most recent on file, newest first.

Issued	Product	Office	Lasted
Sep 20, 1:18 AM CDT	Severe Thunderstorm Warning	DVN	57 min
Sep 2, 2:02 AM CDT	Extreme Heat Warning	DVN	4 days
Aug 15, 3:19 AM CDT	Flash Flood Warning	DVN	5 hr
Aug 13, 9:36 AM CDT	Severe Thunderstorm Warning	DVN	54 min
Aug 13, 9:10 AM CDT	Tornado Warning	DVN	50 min
Aug 13, 8:52 AM CDT	Severe Thunderstorm Warning	DVN	53 min
Aug 7, 9:28 PM CDT	Severe Thunderstorm Warning	DVN	62 min
Aug 7, 9:07 PM CDT	Severe Thunderstorm Warning	DVN	45 min
Aug 7, 8:28 PM CDT	Severe Thunderstorm Warning	DVN	62 min
Aug 7, 7:38 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	67 min
Jul 25, 2:49 AM CDT	Extreme Heat Warning	DVN	67 hr
Jul 20, 6:53 PM CDT	Severe Thunderstorm Warning	DVN	49 min

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive

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.