Weather alerts in Polk County, Minnesota, 2020

212 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Polk County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 212
Warnings: 91
Watches: 21
Advisories: 58
Busiest month: August50 alerts
Busiest day: August 14, 202020 alerts

Over time

By month

Warning verification

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

1 of 4 tornado warnings covering Polk County in 2020 had a tornado report inside them.

Polk County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	1	75%	0
Severe thunderstorm warnings	58	52	10%	25	92%	27 min
Flash flood warnings	3	2	33%	0

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Forks, ND: tornado warnings	42	14	67%	52	56%	8 min
NWS Grand Forks, ND: severe thunderstorm warnings	308	261	15%	707	85%	26 min
NWS Grand Forks, ND: flash flood warnings	12	11	8%	21	90%	201 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, 9:15 AM CST	Winter Weather Advisory	FGF	10 hr
Jan 4, 3:08 PM CST	Wind Advisory	FGF	24 hr
Jan 5, 4:48 AM CST	High Wind Warning	FGF	4 hr
Jan 5, 4:48 AM CST	Wind Advisory	FGF	10 hr
Jan 7, 3:31 PM CST	Wind Chill Advisory	FGF	20 hr
Jan 9, 2:11 PM CST	Wind Chill Advisory	FGF	22 hr
Jan 10, 11:56 AM CST	Wind Chill Advisory	FGF	24 hr
Jan 14, 6:56 AM CST	Wind Chill Advisory	FGF	56 hr
Jan 15, 2:53 PM CST	Winter Storm Watch	FGF	38 hr
Jan 15, 9:52 PM CST	Wind Chill Warning	FGF	9 hr
Jan 15, 9:52 PM CST	Wind Chill Advisory	FGF	17 hr
Jan 16, 3:17 PM CST	Wind Chill Advisory	FGF	8 hr
Jan 16, 3:17 PM CST	Winter Storm Warning	FGF	51 hr
Jan 16, 3:17 PM CST	Winter Weather Advisory	FGF	31 hr
Jan 17, 4:39 AM CST	Blizzard Warning	FGF	37 hr
Jan 18, 3:05 PM CST	Wind Chill Advisory	FGF	21 hr
Jan 19, 2:25 PM CST	Wind Chill Advisory	FGF	22 hr
Jan 25, 10:14 PM CST	Winter Weather Advisory	FGF	23 hr
Jan 30, 4:08 AM CST	Winter Weather Advisory	FGF	8 hr
Feb 1, 1:34 PM CST	Wind Advisory	FGF	21 hr
Feb 6, 2:03 PM CST	Wind Chill Advisory	FGF	20 hr
Feb 7, 2:05 PM CST	Wind Chill Advisory	FGF	16 hr
Feb 10, 3:31 AM CST	Winter Storm Watch	FGF	35 hr
Feb 11, 2:51 PM CST	Blizzard Warning	FGF	24 hr
Feb 11, 2:51 PM CST	Winter Weather Advisory	FGF	20 hr
Feb 11, 7:01 PM CST	Wind Chill Warning	FGF	41 hr
Feb 11, 7:01 PM CST	Wind Chill Advisory	FGF	16 hr
Feb 12, 6:08 AM CST	Wind Chill Warning	FGF	30 hr
Feb 12, 6:08 AM CST	Wind Chill Advisory	FGF	4 hr
Feb 13, 2:31 PM CST	Wind Chill Advisory	FGF	21 hr
Feb 18, 2:30 PM CST	Wind Chill Advisory	FGF	20 hr
Feb 19, 2:26 PM CST	Wind Chill Advisory	FGF	19 hr
Feb 24, 4:35 AM CST	Dense Fog Advisory	FGF	5 hr
Feb 29, 2:46 PM CST	Wind Advisory	FGF	27 hr
Mar 4, 3:06 PM CST	Wind Advisory	FGF	24 hr
Mar 19, 3:24 AM CDT	Winter Weather Advisory	FGF	18 hr
Mar 23, 6:50 AM CDT	Dense Fog Advisory	FGF	3 hr
Mar 28, 10:59 AM CDT	River Flood Warning	FGF	35 days
Mar 28, 10:59 AM CDT	River Flood Warning	FGF	30 days
Mar 29, 11:19 AM CDT	River Flood Warning	FGF	17 days
Mar 30, 3:19 AM CDT	Dense Fog Advisory	FGF	9 hr
Mar 30, 10:53 AM CDT	River Flood Warning	FGF	15 days
Apr 1, 4:37 AM CDT	Winter Storm Watch	FGF	23 hr
Apr 1, 3:30 PM CDT	Winter Storm Warning	FGF	42 hr
Apr 6, 11:43 PM CDT	Dense Fog Advisory	FGF	10 hr
Apr 28, 5:09 PM CDT	Special Weather Statement	FGF	36 min
May 1, 2:42 PM CDT	Fire Weather Watch	FGF	13 hr
May 2, 4:00 AM CDT	Red Flag Warning	FGF	15 hr
May 14, 5:39 AM CDT	Dense Fog Advisory	FGF	3 hr
May 29, 2:30 PM CDT	Frost Advisory	FGF	17 hr
Jun 7, 2:07 AM CDT	Special Weather Statement	FGF	38 min
Jun 7, 2:18 AM CDT	Mesoscale Discussion	SPC	117 min
Jun 7, 1:39 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 7, 3:02 PM CDT	Severe Thunderstorm Warning	FGF	43 min
Jun 7, 3:06 PM CDT	Tornado Watch	SPC	7 hr
Jun 7, 5:33 PM CDT	Severe Thunderstorm Warning	FGF	29 min
Jun 7, 5:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 7:46 PM CDT	Severe Thunderstorm Warning	FGF	44 min
Jun 7, 9:17 PM CDT	Severe Thunderstorm Warning	FGF	43 min
Jun 7, 9:23 PM CDT	Severe Thunderstorm Warning	FGF	67 min
Jun 7, 9:46 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 7, 10:04 PM CDT	Severe Thunderstorm Warning	FGF	41 min
Jun 7, 10:14 PM CDT	Severe Thunderstorm Warning	FGF	61 min
Jun 7, 11:15 PM CDT	Severe Thunderstorm Warning	FGF	45 min
Jun 7, 11:33 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 8, 12:23 AM CDT	Severe Thunderstorm Warning	FGF	38 min
Jun 8, 12:45 AM CDT	Severe Thunderstorm Warning	FGF	17 min
Jun 8, 9:58 AM CDT	River Flood Warning	FGF	4 days
Jun 8, 2:10 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 8, 3:00 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 8, 5:12 PM CDT	Tornado Warning	FGF	18 min
Jun 8, 5:28 PM CDT	Severe Thunderstorm Warning	FGF	47 min
Jun 8, 6:09 PM CDT	Severe Thunderstorm Warning	FGF	51 min
Jun 8, 6:50 PM CDT	Mesoscale Discussion	SPC	115 min
Jun 11, 4:29 PM CDT	Severe Thunderstorm Warning	FGF	33 min
Jun 14, 3:15 AM CDT	Wind Advisory	FGF	16 hr
Jun 15, 3:59 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 16, 3:13 AM CDT	Wind Advisory	FGF	18 hr
Jun 17, 2:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 5:21 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 17, 7:39 PM CDT	Severe Thunderstorm Warning	FGF	51 min
Jun 17, 7:47 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 17, 8:10 PM CDT	Severe Thunderstorm Warning	FGF	65 min
Jun 17, 8:39 PM CDT	Severe Thunderstorm Warning	FGF	66 min
Jun 17, 8:51 PM CDT	Severe Thunderstorm Warning	FGF	39 min
Jun 17, 9:13 PM CDT	Severe Thunderstorm Warning	FGF	62 min
Jun 17, 9:19 PM CDT	Severe Thunderstorm Warning	FGF	56 min
Jun 17, 10:12 PM CDT	Severe Thunderstorm Warning	FGF	63 min
Jun 17, 11:09 PM CDT	Mesoscale Discussion	SPC	66 min
Jun 18, 12:32 AM CDT	Special Weather Statement	FGF	58 min
Jun 18, 3:24 AM CDT	Special Weather Statement	FGF	51 min
Jun 20, 3:22 PM CDT	Severe Thunderstorm Warning	FGF	26 min
Jun 25, 1:41 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 30, 10:19 PM CDT	Special Weather Statement	FGF	56 min
Jul 1, 12:21 AM CDT	Flash Flood Warning	FGF	6 hr
Jul 1, 7:03 AM CDT	Areal Flood Warning	FGF	63 hr
Jul 4, 12:07 AM CDT	Severe Thunderstorm Warning	FGF	25 min
Jul 4, 9:13 AM CDT	River Flood Warning	FGF	4 days
Jul 4, 10:09 AM CDT	Special Weather Statement	FGF	66 min
Jul 4, 3:23 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 4, 3:53 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 4, 5:01 PM CDT	Special Weather Statement	FGF	44 min
Jul 4, 5:45 PM CDT	Special Weather Statement	FGF	60 min
Jul 4, 6:25 PM CDT	Areal Flood Advisory	FGF	12 hr
Jul 4, 7:08 PM CDT	Special Weather Statement	FGF	37 min
Jul 4, 7:10 PM CDT	Areal Flood Advisory	FGF	17 hr
Jul 4, 8:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 7, 11:44 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 8, 1:37 AM CDT	Mesoscale Discussion	SPC	113 min
Jul 8, 2:18 AM CDT	Severe Thunderstorm Warning	FGF	57 min
Jul 8, 2:22 AM CDT	Severe Thunderstorm Warning	FGF	53 min
Jul 13, 3:52 PM CDT	Mesoscale Discussion	SPC	113 min
Jul 13, 7:10 PM CDT	Severe Thunderstorm Warning	FGF	65 min
Jul 17, 12:30 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 17, 4:23 PM CDT	Severe Thunderstorm Warning	FGF	67 min
Jul 17, 4:58 PM CDT	Severe Thunderstorm Warning	FGF	62 min
Jul 17, 5:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 17, 5:21 PM CDT	Severe Thunderstorm Warning	FGF	54 min
Jul 17, 5:47 PM CDT	Severe Thunderstorm Warning	FGF	58 min
Jul 17, 5:54 PM CDT	Severe Thunderstorm Warning	FGF	66 min
Jul 17, 6:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 23, 3:19 AM CDT	Excessive Heat Watch	FGF	24 hr
Jul 24, 3:26 AM CDT	Excessive Heat Warning	FGF	17 hr
Jul 24, 3:26 AM CDT	Heat Advisory	FGF	17 hr
Jul 24, 4:53 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 24, 10:14 PM CDT	Severe Thunderstorm Warning	FGF	46 min
Jul 24, 10:38 PM CDT	Special Weather Statement	FGF	67 min
Jul 24, 11:02 PM CDT	Severe Thunderstorm Warning	FGF	43 min
Jul 25, 2:31 AM CDT	Severe Thunderstorm Warning	FGF	44 min
Jul 26, 12:08 AM CDT	Severe Thunderstorm Warning	FGF	52 min
Jul 26, 12:58 AM CDT	Special Weather Statement	FGF	62 min
Jul 26, 1:15 AM CDT	Areal Flood Advisory	FGF	3 hr
Aug 9, 11:48 AM CDT	Mesoscale Discussion	SPC	57 min
Aug 9, 12:18 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 9, 1:39 PM CDT	Severe Thunderstorm Warning	FGF	66 min
Aug 9, 2:01 PM CDT	Tornado Warning	FGF	44 min
Aug 9, 2:05 PM CDT	Severe Thunderstorm Warning	FGF	55 min
Aug 9, 2:10 PM CDT	Severe Thunderstorm Warning	FGF	65 min
Aug 9, 2:30 PM CDT	Mesoscale Discussion	SPC	90 min
Aug 9, 2:42 PM CDT	Tornado Warning	FGF	48 min
Aug 9, 3:12 PM CDT	Severe Thunderstorm Warning	FGF	63 min
Aug 9, 3:18 PM CDT	Severe Thunderstorm Warning	FGF	57 min
Aug 9, 3:41 PM CDT	Severe Thunderstorm Warning	FGF	64 min
Aug 9, 4:38 PM CDT	Severe Thunderstorm Warning	FGF	52 min
Aug 13, 4:17 PM CDT	Mesoscale Discussion	SPC	88 min
Aug 13, 6:09 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 13, 7:15 PM CDT	Severe Thunderstorm Warning	FGF	60 min
Aug 13, 7:53 PM CDT	Severe Thunderstorm Warning	FGF	67 min
Aug 13, 8:14 PM CDT	Severe Thunderstorm Warning	FGF	61 min
Aug 13, 8:24 PM CDT	Severe Thunderstorm Warning	FGF	28 min
Aug 13, 8:26 PM CDT	Mesoscale Discussion	SPC	94 min
Aug 13, 8:36 PM CDT	Tornado Warning	FGF	39 min
Aug 13, 9:15 PM CDT	Severe Thunderstorm Warning	FGF	60 min
Aug 13, 9:42 PM CDT	Severe Thunderstorm Warning	FGF	63 min
Aug 13, 10:12 PM CDT	Flash Flood Warning	FGF	9 hr
Aug 13, 10:13 PM CDT	Severe Thunderstorm Warning	FGF	62 min
Aug 13, 10:42 PM CDT	Severe Thunderstorm Warning	FGF	63 min
Aug 14, 12:51 AM CDT	Areal Flood Advisory	FGF	8 hr
Aug 14, 4:02 AM CDT	Dense Fog Advisory	FGF	5 hr
Aug 14, 4:56 AM CDT	Flash Flood Watch	FGF	13 hr
Aug 14, 6:06 AM CDT	Mesoscale Discussion	SPC	114 min
Aug 14, 6:41 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 14, 9:15 AM CDT	Severe Thunderstorm Warning	FGF	18 min
Aug 14, 9:32 AM CDT	Special Weather Statement	FGF	43 min
Aug 14, 10:19 AM CDT	Mesoscale Discussion	SPC	86 min
Aug 14, 3:29 PM CDT	Flash Flood Warning	FGF	5 hr
Aug 15, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 15, 6:39 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 16, 9:51 AM CDT	River Flood Warning	FGF	4 days
Aug 16, 9:56 AM CDT	River Flood Warning	FGF	4 days
Aug 19, 4:54 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 19, 4:57 AM CDT	Severe Thunderstorm Warning	FGF	63 min
Aug 19, 5:26 AM CDT	Severe Thunderstorm Warning	FGF	49 min
Aug 19, 5:45 AM CDT	Special Weather Statement	FGF	60 min
Aug 19, 6:44 AM CDT	Severe Thunderstorm Warning	FGF	34 min
Aug 19, 7:18 AM CDT	Special Weather Statement	FGF	57 min
Aug 19, 7:28 AM CDT	Severe Thunderstorm Warning	FGF	62 min
Aug 19, 7:46 AM CDT	Special Weather Statement	FGF	59 min
Aug 19, 8:15 AM CDT	Special Weather Statement	FGF	60 min
Aug 19, 9:27 AM CDT	Severe Thunderstorm Warning	FGF	48 min
Aug 22, 2:26 AM CDT	Dense Fog Advisory	FGF	8 hr
Aug 23, 4:23 AM CDT	Dense Fog Advisory	FGF	6 hr
Sep 2, 2:53 PM CDT	Wind Advisory	FGF	12 hr
Sep 2, 7:19 PM CDT	Mesoscale Discussion	SPC	86 min
Sep 2, 8:35 PM CDT	Severe Thunderstorm Warning	FGF	55 min
Sep 2, 9:30 PM CDT	Severe Thunderstorm Warning	FGF	60 min
Sep 6, 3:32 AM CDT	Wind Advisory	FGF	18 hr
Sep 7, 2:48 AM CDT	Frost Advisory	FGF	30 hr
Sep 7, 2:48 AM CDT	Freeze Watch	FGF	36 hr
Sep 7, 2:48 AM CDT	Freeze Warning	FGF	30 hr
Sep 8, 2:54 PM CDT	Freeze Warning	FGF	18 hr
Sep 16, 3:37 AM CDT	Frost Advisory	FGF	28 hr
Sep 16, 3:37 AM CDT	Freeze Warning	FGF	28 hr
Sep 17, 9:44 PM CDT	Frost Advisory	FGF	11 hr
Oct 1, 3:24 AM CDT	Freeze Warning	FGF	29 hr
Oct 1, 3:41 PM CDT	Frost Advisory	FGF	16 hr
Oct 6, 3:31 AM CDT	Wind Advisory	FGF	11 hr
Oct 11, 7:40 PM CDT	Severe Thunderstorm Warning	FGF	34 min
Oct 16, 11:49 AM CDT	Winter Weather Advisory	FGF	25 hr
Oct 20, 3:19 PM CDT	Winter Storm Watch	FGF	24 hr
Oct 30, 1:58 PM CDT	Wind Advisory	FGF	38 hr
Nov 7, 2:14 PM CST	Wind Advisory	FGF	32 hr
Nov 19, 2:46 AM CST	Winter Weather Advisory	FGF	21 hr
Nov 24, 3:36 AM CST	Winter Weather Advisory	FGF	11 hr
Dec 5, 10:01 PM CST	Dense Fog Advisory	FGF	14 hr
Dec 6, 3:09 PM CST	Dense Fog Advisory	FGF	22 hr
Dec 21, 4:30 AM CST	Winter Storm Watch	FGF	35 hr
Dec 22, 3:28 PM CST	Blizzard Warning	FGF	28 hr
Dec 22, 3:28 PM CST	Winter Storm Warning	FGF	24 hr
Dec 23, 6:29 AM CST	Winter Storm Warning	FGF	4 hr
Dec 23, 3:05 PM CST	Wind Chill Advisory	FGF	24 hr
Dec 28, 3:13 PM CST	Winter Weather Advisory	FGF	42 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	58
Tornado Warning	4
Severe Thunderstorm Watch	11
Tornado Watch	1
Mesoscale Discussion	26
Special Weather Statement	16
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
River Flood Warning	8
Flash Flood Watch	1
Areal Flood Advisory	4
Winter
Blizzard Warning	3
Winter Storm Warning	4
Winter Storm Watch	5
Winter Weather Advisory	10
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	1
Cold
Freeze Warning	4
Wind Chill Warning	3
Freeze Watch	1
Frost Advisory	5
Wind Chill Advisory	16
Wind and dust
High Wind Warning	1
Wind Advisory	12
Fire
Red Flag Warning	1
Fire Weather Watch	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 2019 2021

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.