Alert archive / Virginia / Chesterfield County

Weather alerts in Chesterfield County, Virginia, 2011

175 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Chesterfield County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 175
Warnings: 40
Watches: 18
Advisories: 16
Busiest month: July30 alerts
Busiest day: July 4, 201111 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 2 tornado warnings covering Chesterfield County in 2011 had a tornado report inside them.

Chesterfield County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	1	50%	0
Severe thunderstorm warnings	29	24	17%	22	73%	21 min
Flash flood warnings	3	3	0%	1	100%	51 min

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Wakefield, VA: tornado warnings	84	23	73%	43	77%	14 min
NWS Wakefield, VA: severe thunderstorm warnings	241	150	38%	386	79%	19 min
NWS Wakefield, VA: flash flood warnings	11	8	27%	35	86%	70 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 26, 12:30 PM EST	Special Weather Statement	AKQ	60 min
Feb 25, 8:20 AM EST	Special Weather Statement	AKQ	55 min
Feb 28, 4:04 PM EST	Special Weather Statement	AKQ	56 min
Mar 6, 12:06 PM EST	Mesoscale Discussion	SPC	84 min
Mar 6, 6:24 PM EST	Tornado Watch	SPC	4 hr
Mar 6, 6:41 PM EST	Special Weather Statement	AKQ	49 min
Mar 6, 7:27 PM EST	Severe Thunderstorm Warning	AKQ	48 min
Mar 6, 8:04 PM EST	Mesoscale Discussion	SPC	56 min
Mar 7, 9:38 AM EST	River Flood Warning	AKQ	48 hr
Mar 9, 1:59 PM EST	River Flood Warning	AKQ	4 days
Mar 10, 1:25 PM EST	Severe Thunderstorm Watch	SPC	7 hr
Mar 10, 1:53 PM EST	Special Weather Statement	AKQ	52 min
Mar 10, 4:26 PM EST	Mesoscale Discussion	SPC	94 min
Mar 10, 5:12 PM EST	Special Weather Statement	AKQ	63 min
Mar 10, 5:28 PM EST	Severe Thunderstorm Warning	AKQ	47 min
Mar 21, 6:44 AM EDT	Special Weather Statement	AKQ	61 min
Mar 21, 8:16 PM EDT	Special Weather Statement	AKQ	59 min
Mar 23, 6:04 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 23, 6:36 PM EDT	Special Weather Statement	AKQ	54 min
Mar 23, 7:06 PM EDT	Severe Thunderstorm Warning	AKQ	39 min
Mar 23, 9:28 PM EDT	Special Weather Statement	AKQ	62 min
Mar 23, 10:26 PM EDT	Mesoscale Discussion	SPC	64 min
Mar 24, 11:00 AM EDT	Special Weather Statement	AKQ	60 min
Apr 5, 2:13 AM EDT	Mesoscale Discussion	SPC	32 min
Apr 5, 2:18 AM EDT	Tornado Watch	SPC	8 hr
Apr 5, 3:34 AM EDT	Mesoscale Discussion	SPC	116 min
Apr 5, 4:09 AM EDT	Special Weather Statement	AKQ	36 min
Apr 5, 4:36 AM EDT	Severe Thunderstorm Warning	AKQ	54 min
Apr 5, 9:16 AM EDT	Special Weather Statement	AKQ	59 min
Apr 16, 10:39 AM EDT	Mesoscale Discussion	SPC	2 hr
Apr 16, 12:02 PM EDT	Tornado Watch PDS	SPC	11 hr
Apr 16, 2:28 PM EDT	Mesoscale Discussion	SPC	92 min
Apr 16, 4:23 PM EDT	Severe Thunderstorm Warning	AKQ	52 min
Apr 16, 4:36 PM EDT	Tornado Warning	AKQ	24 min
Apr 16, 4:49 PM EDT	Mesoscale Discussion	SPC	86 min
Apr 16, 4:56 PM EDT	Tornado Warning	AKQ	34 min
Apr 16, 5:32 PM EDT	Severe Thunderstorm Warning	AKQ	28 min
Apr 17, 5:20 AM EDT	River Flood Warning	AKQ	61 hr
Apr 27, 12:51 PM EDT	Mesoscale Discussion	SPC	84 min
Apr 27, 1:23 PM EDT	Tornado Watch	SPC	5 hr
Apr 27, 6:00 PM EDT	Mesoscale Discussion	SPC	60 min
Apr 27, 6:15 PM EDT	Tornado Watch	SPC	6 hr
Apr 27, 7:55 PM EDT	Mesoscale Discussion	SPC	65 min
Apr 27, 10:12 PM EDT	Mesoscale Discussion	SPC	63 min
Apr 28, 7:38 AM EDT	Tornado Watch	SPC	7 hr
Apr 28, 10:44 AM EDT	Mesoscale Discussion	SPC	61 min
Apr 28, 2:00 PM EDT	Mesoscale Discussion	SPC	60 min
Apr 28, 6:44 PM EDT	Special Weather Statement	AKQ	61 min
Apr 28, 7:15 PM EDT	Severe Thunderstorm Warning	AKQ	45 min
Apr 28, 7:20 PM EDT	Severe Thunderstorm Warning	AKQ	55 min
May 3, 10:38 PM EDT	Special Weather Statement	AKQ	37 min
May 6, 5:21 PM EDT	Special Weather Statement	AKQ	54 min
May 14, 1:44 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
May 14, 5:42 PM EDT	Severe Thunderstorm Warning	AKQ	48 min
May 14, 6:03 PM EDT	Severe Thunderstorm Warning	AKQ	42 min
May 14, 7:32 PM EDT	Mesoscale Discussion	SPC	58 min
May 14, 7:35 PM EDT	Areal Flood Advisory	AKQ	115 min
May 15, 1:38 PM EDT	Mesoscale Discussion	SPC	2 hr
May 17, 6:47 AM EDT	Special Weather Statement	AKQ	43 min
May 17, 7:30 AM EDT	Special Weather Statement	AKQ	60 min
May 17, 11:14 AM EDT	Mesoscale Discussion	SPC	2 hr
May 17, 12:45 PM EDT	Special Weather Statement	AKQ	45 min
May 18, 11:55 AM EDT	Mesoscale Discussion	SPC	65 min
May 23, 12:46 AM EDT	Special Weather Statement	AKQ	59 min
May 23, 2:33 PM EDT	Mesoscale Discussion	SPC	87 min
May 23, 3:16 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 23, 7:02 PM EDT	Mesoscale Discussion	SPC	58 min
May 24, 12:15 PM EDT	Mesoscale Discussion	SPC	90 min
May 24, 12:42 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 27, 12:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 27, 3:29 PM EDT	Mesoscale Discussion	SPC	91 min
May 27, 5:30 PM EDT	Special Weather Statement	AKQ	30 min
May 27, 6:01 PM EDT	Special Weather Statement	AKQ	29 min
May 27, 6:24 PM EDT	Mesoscale Discussion	SPC	66 min
May 28, 1:33 PM EDT	Special Weather Statement	AKQ	27 min
May 28, 2:47 PM EDT	Special Weather Statement	AKQ	28 min
Jun 1, 1:37 PM EDT	Mesoscale Discussion	SPC	83 min
Jun 5, 2:38 AM EDT	Special Weather Statement	AKQ	22 min
Jun 5, 3:02 AM EDT	Special Weather Statement	AKQ	28 min
Jun 5, 3:33 AM EDT	Special Weather Statement	AKQ	27 min
Jun 5, 5:07 AM EDT	Special Weather Statement	AKQ	23 min
Jun 5, 5:29 AM EDT	Special Weather Statement	AKQ	31 min
Jun 10, 1:39 PM EDT	Mesoscale Discussion	SPC	96 min
Jun 10, 3:54 PM EDT	Areal Flood Advisory	AKQ	96 min
Jun 11, 5:28 PM EDT	Severe Thunderstorm Warning	AKQ	47 min
Jun 11, 5:56 PM EDT	Severe Thunderstorm Warning	AKQ	49 min
Jun 11, 6:35 PM EDT	Severe Thunderstorm Warning	AKQ	55 min
Jun 11, 6:39 PM EDT	Severe Thunderstorm Warning	AKQ	36 min
Jun 12, 1:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 16, 6:01 PM EDT	Mesoscale Discussion	SPC	89 min
Jun 17, 1:03 AM EDT	Special Weather Statement	AKQ	57 min
Jun 24, 1:05 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 2:44 PM EDT	Mesoscale Discussion	SPC	91 min
Jun 28, 6:33 PM EDT	Severe Thunderstorm Warning	AKQ	42 min
Jun 28, 7:20 PM EDT	Severe Thunderstorm Warning	AKQ	40 min
Jun 28, 7:41 PM EDT	Areal Flood Advisory	AKQ	2 hr
Jul 3, 10:07 PM EDT	Severe Thunderstorm Warning	AKQ	53 min
Jul 3, 10:55 PM EDT	Severe Thunderstorm Warning	AKQ	50 min
Jul 4, 12:10 PM EDT	Mesoscale Discussion	SPC	95 min
Jul 4, 2:34 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 4, 5:21 PM EDT	Special Weather Statement	AKQ	54 min
Jul 4, 5:42 PM EDT	Severe Thunderstorm Warning	AKQ	48 min
Jul 4, 6:21 PM EDT	Severe Thunderstorm Warning	AKQ	54 min
Jul 4, 6:24 PM EDT	Severe Thunderstorm Warning	AKQ	51 min
Jul 4, 6:26 PM EDT	Areal Flood Advisory	AKQ	94 min
Jul 4, 6:44 PM EDT	Mesoscale Discussion	SPC	61 min
Jul 4, 6:57 PM EDT	Severe Thunderstorm Warning	AKQ	48 min
Jul 6, 1:30 PM EDT	Special Weather Statement	AKQ	45 min
Jul 6, 2:26 PM EDT	Special Weather Statement	AKQ	69 min
Jul 6, 2:33 PM EDT	Severe Thunderstorm Warning	AKQ	42 min
Jul 6, 2:36 PM EDT	Areal Flood Advisory	AKQ	54 min
Jul 6, 3:16 PM EDT	Special Weather Statement	AKQ	59 min
Jul 6, 3:28 PM EDT	Severe Thunderstorm Warning	AKQ	47 min
Jul 6, 3:59 PM EDT	Areal Flood Advisory	AKQ	61 min
Jul 8, 4:09 PM EDT	Special Weather Statement	AKQ	81 min
Jul 8, 8:05 PM EDT	Special Weather Statement	AKQ	55 min
Jul 8, 8:22 PM EDT	Areal Flood Advisory	AKQ	113 min
Jul 8, 9:29 PM EDT	Special Weather Statement	AKQ	61 min
Jul 13, 1:43 PM EDT	Mesoscale Discussion	SPC	92 min
Jul 13, 2:21 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 13, 4:30 PM EDT	Mesoscale Discussion	SPC	90 min
Jul 13, 7:36 PM EDT	Mesoscale Discussion	SPC	54 min
Jul 23, 5:28 PM EDT	Special Weather Statement	AKQ	62 min
Jul 23, 6:17 PM EDT	Mesoscale Discussion	SPC	88 min
Jul 24, 6:34 PM EDT	Mesoscale Discussion	SPC	116 min
Jul 25, 7:23 PM EDT	Mesoscale Discussion	SPC	67 min
Aug 1, 10:46 PM EDT	Special Weather Statement	AKQ	59 min
Aug 3, 1:03 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 7, 12:52 PM EDT	Mesoscale Discussion	SPC	53 min
Aug 7, 7:09 PM EDT	Special Weather Statement	AKQ	66 min
Aug 13, 1:33 PM EDT	Mesoscale Discussion	SPC	117 min
Aug 14, 6:37 PM EDT	Mesoscale Discussion	SPC	53 min
Aug 14, 10:25 PM EDT	Special Weather Statement	AKQ	65 min
Aug 21, 1:45 PM EDT	Mesoscale Discussion	SPC	90 min
Aug 21, 2:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 21, 6:42 PM EDT	Mesoscale Discussion	SPC	63 min
Aug 25, 2:47 PM EDT	Mesoscale Discussion	SPC	58 min
Aug 25, 3:23 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 25, 5:54 PM EDT	Severe Thunderstorm Warning	AKQ	51 min
Aug 25, 6:24 PM EDT	Mesoscale Discussion	SPC	96 min
Aug 25, 6:36 PM EDT	Severe Thunderstorm Warning	AKQ	24 min
Aug 26, 11:06 PM EDT	Mesoscale Discussion	SPC	84 min
Aug 27, 12:52 PM EDT	Areal Flood Warning	AKQ	15 hr
Aug 27, 3:57 PM EDT	Areal Flood Warning	AKQ	12 hr
Sep 6, 5:00 PM EDT	Special Weather Statement	AKQ	45 min
Sep 7, 10:47 AM EDT	Areal Flood Advisory	AKQ	103 min
Sep 7, 8:48 PM EDT	Areal Flood Advisory	AKQ	72 min
Sep 7, 9:59 PM EDT	Flash Flood Warning	AKQ	2 hr
Sep 8, 7:54 PM EDT	Flash Flood Warning	AKQ	3 hr
Sep 8, 9:52 PM EDT	Flash Flood Warning	AKQ	53 min
Sep 23, 2:22 PM EDT	Special Weather Statement	AKQ	53 min
Sep 23, 3:02 PM EDT	Areal Flood Advisory	AKQ	2 hr
Sep 27, 1:54 PM EDT	Areal Flood Advisory	AKQ	66 min
Sep 27, 5:06 PM EDT	Areal Flood Advisory	AKQ	2 hr
Sep 27, 7:47 PM EDT	Special Weather Statement	AKQ	43 min
Sep 28, 3:37 AM EDT	Areal Flood Advisory	AKQ	113 min
Sep 28, 4:39 AM EDT	Areal Flood Advisory	AKQ	111 min
Oct 13, 3:30 AM EDT	Special Weather Statement	AKQ	60 min
Nov 16, 1:02 PM EST	Special Weather Statement	AKQ	28 min
Nov 16, 7:23 PM EST	Mesoscale Discussion	SPC	67 min
Nov 16, 7:49 PM EST	Areal Flood Advisory	AKQ	101 min
Nov 16, 7:53 PM EST	Special Weather Statement	AKQ	67 min
Nov 16, 8:13 PM EST	Severe Thunderstorm Warning	AKQ	47 min
Nov 16, 8:45 PM EST	Severe Thunderstorm Warning	AKQ	45 min
Nov 23, 4:39 AM EST	Special Weather Statement	AKQ	51 min
Dec 7, 4:56 PM EST	Mesoscale Discussion	SPC	94 min
Dec 7, 5:42 PM EST	Mesoscale Discussion	SPC	33 min
Dec 7, 5:56 PM EST	Severe Thunderstorm Watch	SPC	4 hr
Dec 7, 6:26 PM EST	Special Weather Statement	AKQ	34 min
Dec 7, 7:01 PM EST	Severe Thunderstorm Warning	AKQ	30 min
Dec 7, 7:09 PM EST	Areal Flood Advisory	AKQ	51 min
Dec 8, 5:06 AM EST	River Flood Warning	AKQ	63 hr
Dec 27, 2:36 PM EST	Special Weather Statement	AKQ	24 min
Dec 27, 3:31 PM EST	Special Weather Statement	AKQ	44 min
Dec 27, 4:16 PM EST	Special Weather Statement	AKQ	29 min

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	29
Tornado Warning	2
Severe Thunderstorm Watch	12
Tornado Watch	6
Mesoscale Discussion	49
Special Weather Statement	52
Flooding
Areal Flood Warning	2
Flash Flood Warning	3
River Flood Warning	4
Areal Flood Advisory	16

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2010 2012

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.