Alert archive / Iowa / Black Hawk County

Weather alerts in Black Hawk County, Iowa, 2014

157 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Black Hawk County and its neighbors

Each county as a circle sized by its count in 2014. Tap one for its archive.

Alerts: 157
Warnings: 45
Watches: 25
Advisories: 52
Busiest month: June47 alerts
Busiest day: June 30, 201418 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

3 of 7 tornado warnings covering Black Hawk County in 2014 had a tornado report inside them.

Black Hawk County, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	7	3	57%	0
Severe thunderstorm warnings	15	10	33%	8	100%	20 min
Flash flood warnings	4	2	50%	2	100%	136 min

Each office's whole area, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Des Moines, IA: tornado warnings	57	15	74%	46	48%	12 min
NWS Des Moines, IA: severe thunderstorm warnings	301	149	50%	487	85%	25 min
NWS Des Moines, IA: flash flood warnings	62	29	53%	69	84%	111 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 1, 3:26 PM CST	Wind Chill Advisory	DMX	21 hr
Jan 2, 4:16 PM CST	Wind Chill Advisory	DMX	17 hr
Jan 3, 3:36 PM CST	Wind Chill Watch	DMX	13 hr
Jan 4, 4:14 AM CST	Wind Chill Warning	DMX	72 hr
Jan 6, 3:39 PM CST	Wind Chill Advisory	DMX	17 hr
Jan 9, 4:08 PM CST	Freezing Rain Advisory	DMX	29 hr
Jan 13, 3:07 PM CST	Wind Advisory	DMX	27 hr
Jan 14, 3:30 AM CST	Winter Weather Advisory	DMX	15 hr
Jan 15, 3:51 AM CST	Winter Weather Advisory	DMX	41 hr
Jan 16, 8:26 PM CST	Wind Chill Advisory	DMX	13 hr
Jan 17, 3:52 PM CST	Winter Weather Advisory	DMX	24 hr
Jan 20, 3:42 AM CST	Wind Chill Advisory	DMX	32 hr
Jan 22, 4:07 AM CST	Wind Chill Warning	DMX	32 hr
Jan 22, 4:07 AM CST	Wind Chill Advisory	DMX	44 hr
Jan 22, 4:07 AM CST	Winter Weather Advisory	DMX	17 hr
Jan 24, 3:30 PM CST	Blizzard Watch	DMX	24 hr
Jan 25, 3:55 PM CST	Blizzard Warning	DMX	32 hr
Jan 25, 3:55 PM CST	Winter Weather Advisory	DMX	10 hr
Jan 26, 4:45 AM CST	Wind Chill Warning	DMX	53 hr
Jan 28, 3:57 AM CST	Wind Chill Advisory	DMX	14 hr
Feb 1, 3:00 PM CST	Wind Chill Advisory	DMX	19 hr
Feb 3, 3:45 PM CST	Winter Weather Advisory	DMX	41 hr
Feb 5, 3:18 PM CST	Wind Chill Advisory	DMX	21 hr
Feb 6, 3:33 PM CST	Wind Chill Advisory	DMX	17 hr
Feb 9, 3:40 AM CST	Wind Chill Advisory	DMX	31 hr
Feb 15, 10:19 AM CST	Winter Weather Advisory	DMX	5 hr
Feb 16, 4:52 AM CST	Winter Weather Advisory	DMX	31 hr
Feb 18, 4:06 AM CST	Blizzard Watch	DMX	36 hr
Feb 19, 4:54 AM CST	Blizzard Warning	DMX	49 hr
Feb 19, 3:43 PM CST	Winter Weather Advisory	DMX	38 hr
Feb 20, 11:20 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 25, 3:54 AM CST	Wind Chill Advisory	DMX	31 hr
Feb 26, 3:55 AM CST	Winter Weather Advisory	DMX	23 hr
Feb 26, 4:06 PM CST	Wind Chill Advisory	DMX	19 hr
Feb 27, 3:56 PM CST	Wind Chill Advisory	DMX	16 hr
Feb 28, 4:26 PM CST	Wind Chill Advisory	DMX	63 hr
Feb 28, 4:26 PM CST	Winter Weather Advisory	DMX	35 hr
Mar 4, 2:15 PM CST	Winter Weather Advisory	DMX	13 hr
Mar 20, 6:15 AM CDT	Dense Fog Advisory	DMX	5 hr
Mar 31, 3:58 AM CDT	Wind Advisory	DMX	27 hr
Mar 31, 6:04 PM CDT	Special Weather Statement	DMX	26 min
Mar 31, 6:43 PM CDT	Mesoscale Discussion	SPC	3 hr
Apr 3, 3:54 PM CDT	Wind Advisory	DMX	23 hr
Apr 3, 8:29 PM CDT	Special Weather Statement	DMX	31 min
Apr 9, 3:56 AM CDT	Red Flag Warning	DMX	15 hr
Apr 12, 2:30 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 12, 3:15 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 12, 6:14 PM CDT	Severe Thunderstorm Warning	DMX	46 min
Apr 12, 6:20 PM CDT	Mesoscale Discussion	SPC	55 min
Apr 12, 8:49 PM CDT	Severe Thunderstorm Warning	DMX	41 min
Apr 12, 9:08 PM CDT	Mesoscale Discussion	SPC	67 min
Apr 12, 9:34 PM CDT	Severe Thunderstorm Warning	DMX	41 min
Apr 12, 9:38 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 12, 10:09 PM CDT	Severe Thunderstorm Warning	DMX	36 min
Apr 12, 11:26 PM CDT	Mesoscale Discussion	SPC	64 min
Apr 13, 3:37 PM CDT	Flood Watch	DMX	6 hr
Apr 16, 4:21 AM CDT	Wind Advisory	DMX	14 hr
Apr 27, 4:18 AM CDT	Wind Advisory	DMX	17 hr
Apr 27, 4:26 PM CDT	Special Weather Statement	DMX	49 min
Apr 27, 4:26 PM CDT	Mesoscale Discussion	SPC	64 min
May 2, 7:04 AM CDT	River Flood Warning	DMX	69 hr
May 8, 8:34 PM CDT	Mesoscale Discussion	SPC	86 min
May 11, 9:16 AM CDT	Mesoscale Discussion	SPC	89 min
May 11, 3:32 PM CDT	Flash Flood Watch	DMX	15 hr
May 11, 7:49 PM CDT	Tornado Watch	SPC	7 hr
May 11, 11:01 PM CDT	Mesoscale Discussion	SPC	59 min
May 12, 10:34 AM CDT	Flash Flood Watch	DMX	7 hr
May 12, 1:00 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 12, 3:21 PM CDT	Mesoscale Discussion	SPC	54 min
May 12, 7:26 PM CDT	Mesoscale Discussion	SPC	64 min
May 16, 3:21 PM CDT	Frost Advisory	DMX	16 hr
May 20, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 20, 5:49 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 16, 3:28 PM CDT	Flash Flood Watch	DMX	12 hr
Jun 16, 5:37 PM CDT	Tornado Watch	SPC	6 hr
Jun 16, 7:53 PM CDT	Tornado Warning	DMX	37 min
Jun 16, 8:04 PM CDT	Severe Thunderstorm Warning	DMX	56 min
Jun 16, 8:16 PM CDT	Tornado Warning	DMX	29 min
Jun 16, 8:19 PM CDT	Severe Thunderstorm Warning	DMX	41 min
Jun 16, 8:45 PM CDT	Severe Thunderstorm Warning	DMX	45 min
Jun 16, 8:59 PM CDT	Severe Thunderstorm Warning	DMX	61 min
Jun 17, 3:59 PM CDT	Flash Flood Watch	DMX	15 hr
Jun 17, 11:39 PM CDT	Tornado Watch	SPC	5 hr
Jun 18, 3:07 AM CDT	Mesoscale Discussion	SPC	53 min
Jun 18, 3:47 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 18, 5:36 AM CDT	Mesoscale Discussion	SPC	54 min
Jun 18, 4:02 PM CDT	Flash Flood Watch	DMX	29 hr
Jun 18, 4:08 PM CDT	River Flood Warning	DMX	9 days
Jun 18, 10:08 PM CDT	River Flood Warning	DMX	6 days
Jun 19, 7:09 AM CDT	Flash Flood Warning	DMX	6 hr
Jun 19, 12:56 PM CDT	Areal Flood Warning	DMX	12 hr
Jun 20, 3:44 AM CDT	Dense Fog Advisory	DMX	4 hr
Jun 20, 10:35 AM CDT	River Flood Warning	DMX	53 hr
Jun 22, 3:50 AM CDT	Flash Flood Watch	DMX	12 hr
Jun 22, 11:19 AM CDT	Mesoscale Discussion	SPC	101 min
Jun 26, 2:54 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 27, 2:30 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 28, 1:12 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 2:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 28, 6:09 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 28, 8:36 PM CDT	River Flood Warning	DMX	7 days
Jun 29, 4:04 PM CDT	Tornado Watch	SPC	7 hr
Jun 29, 7:32 PM CDT	Flash Flood Watch	DMX	22 hr
Jun 29, 8:41 PM CDT	Tornado Warning	DMX	34 min
Jun 29, 8:44 PM CDT	Flash Flood Warning	DMX	6 hr
Jun 29, 9:11 PM CDT	Tornado Warning Tornado observed	DMX	34 min
Jun 30, 2:42 AM CDT	Areal Flood Warning	DMX	6 hr
Jun 30, 7:16 AM CDT	Mesoscale Discussion	SPC	89 min
Jun 30, 9:38 AM CDT	Tornado Watch	SPC	10 hr
Jun 30, 11:11 AM CDT	River Flood Warning	DMX	50 hr
Jun 30, 11:15 AM CDT	River Flood Warning	DMX	5 days
Jun 30, 11:18 AM CDT	River Flood Warning	DMX	3 days
Jun 30, 11:20 AM CDT	River Flood Warning	DMX	3 days
Jun 30, 1:27 PM CDT	Mesoscale Discussion	SPC	93 min
Jun 30, 1:29 PM CDT	Severe Thunderstorm Warning	DMX	46 min
Jun 30, 2:00 PM CDT	Flash Flood Warning	DMX	6 hr
Jun 30, 2:03 PM CDT	Tornado Warning	DMX	27 min
Jun 30, 2:12 PM CDT	Severe Thunderstorm Warning	DMX	34 min
Jun 30, 2:24 PM CDT	Severe Thunderstorm Warning	DMX	21 min
Jun 30, 3:08 PM CDT	Flash Flood Warning	DMX	6 hr
Jun 30, 7:49 PM CDT	Areal Flood Warning	DMX	24 hr
Jul 6, 4:44 PM CDT	Mesoscale Discussion	SPC	61 min
Jul 6, 7:19 PM CDT	Severe Thunderstorm Warning	DMX	41 min
Jul 6, 7:50 PM CDT	Tornado Warning	DMX	25 min
Jul 6, 8:05 PM CDT	Tornado Warning Tornado observed	DMX	40 min
Jul 12, 3:48 PM CDT	Mesoscale Discussion	SPC	117 min
Jul 13, 4:34 AM CDT	Dense Fog Advisory	DMX	2 hr
Jul 20, 3:23 PM CDT	Heat Advisory	DMX	52 hr
Aug 4, 2:06 PM CDT	Mesoscale Discussion	SPC	84 min
Aug 5, 5:47 AM CDT	Dense Fog Advisory	DMX	2 hr
Aug 17, 4:36 AM CDT	Dense Fog Advisory	DMX	4 hr
Aug 18, 6:49 PM CDT	Mesoscale Discussion	SPC	86 min
Aug 18, 7:44 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 18, 9:49 PM CDT	Mesoscale Discussion	SPC	56 min
Aug 19, 12:12 AM CDT	Special Weather Statement	DMX	63 min
Aug 21, 9:04 AM CDT	Mesoscale Discussion	SPC	86 min
Aug 29, 3:02 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 29, 4:42 PM CDT	Severe Thunderstorm Warning	DMX	63 min
Aug 29, 5:46 PM CDT	Special Weather Statement	DMX	29 min
Aug 31, 9:09 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 31, 9:12 PM CDT	Severe Thunderstorm Warning	DMX	48 min
Aug 31, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 31, 9:55 PM CDT	Severe Thunderstorm Warning	DMX	50 min
Sep 9, 3:56 AM CDT	Flash Flood Watch	DMX	24 hr
Sep 12, 3:28 PM CDT	Frost Advisory	DMX	17 hr
Oct 1, 11:12 PM CDT	Dense Fog Advisory	DMX	10 hr
Oct 10, 3:15 PM CDT	Freeze Warning	DMX	18 hr
Oct 23, 3:58 PM CDT	Dense Fog Advisory	DMX	18 hr
Oct 24, 9:12 PM CDT	Dense Fog Advisory	DMX	8 hr
Nov 7, 11:23 AM CST	Wind Advisory	DMX	19 hr
Nov 14, 3:39 AM CST	Winter Weather Advisory	DMX	44 hr
Nov 21, 3:48 AM CST	Freezing Rain Advisory	DMX	26 hr
Nov 25, 3:38 PM CST	Winter Weather Advisory	DMX	26 hr
Dec 13, 3:47 PM CST	Dense Fog Advisory	DMX	40 hr
Dec 21, 12:24 AM CST	Dense Fog Advisory	DMX	9 hr
Dec 29, 3:48 AM CST	Wind Chill Advisory	DMX	32 hr
Dec 30, 2:27 PM CST	Wind Chill Advisory	DMX	20 hr

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	15
Tornado Warning	7
Severe Thunderstorm Watch	8
Tornado Watch	5
Mesoscale Discussion	30
Special Weather Statement	5
Flooding
Areal Flood Warning	3
Flash Flood Warning	4
River Flood Warning	9
Flash Flood Watch	8
Flood Watch	1
Winter
Blizzard Warning	2
Blizzard Watch	2
Freezing Rain Advisory	2
Winter Weather Advisory	14
Heat
Heat Advisory	1
Cold
Freeze Warning	1
Wind Chill Warning	3
Wind Chill Watch	1
Frost Advisory	2
Wind Chill Advisory	17
Wind and dust
Wind Advisory	6
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	10

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2013 2015

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.