Alert archive / Virginia / Powhatan County

Weather alerts in Powhatan County, Virginia, 2008

95 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Powhatan County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts
95
Warnings
16
Watches
26
Advisories
21
Busiest month
June23 alerts
Busiest day
June 4, 20085 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Powhatan County in 2008 had a tornado report inside them.

Powhatan County, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings6433%1100%16 min
Flash flood warnings110%1100%22 min

Each office's whole area, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Wakefield, VA: tornado warnings702071%6560%11 min
NWS Wakefield, VA: severe thunderstorm warnings28813852%33373%22 min
NWS Wakefield, VA: flash flood warnings191237%2959%94 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.

IssuedProductOfficeLasted
Jan 16, 4:32 AM ESTWinter Storm WatchAKQ11 hr
Jan 16, 3:29 PM ESTWinter Weather AdvisoryAKQ32 hr
Jan 19, 4:50 AM ESTWinter Weather AdvisoryAKQ22 hr
Jan 21, 3:33 PM ESTWinter Weather AdvisoryAKQ20 hr
Feb 9, 4:48 AM ESTFire Weather WatchAKQ12 hr
Feb 9, 3:49 PM ESTWind AdvisoryAKQ32 hr
Feb 9, 4:35 PM ESTRed Flag WarningAKQ28 hr
Feb 12, 5:47 PM ESTWinter Weather AdvisoryAKQ13 hr
Feb 13, 10:10 PM ESTWinter Weather AdvisoryAKQ10 hr
Feb 21, 4:20 AM ESTWinter Storm WatchAKQ12 hr
Feb 21, 4:07 PM ESTWinter Weather AdvisoryAKQ23 hr
Feb 22, 12:40 AM ESTMesoscale DiscussionSPC6 hr
Feb 29, 3:30 PM ESTFire Weather WatchAKQ13 hr
Mar 1, 4:30 AM ESTRed Flag WarningAKQ16 hr
Mar 4, 5:53 PM ESTTornado WatchSPC9 hr
Mar 4, 8:09 PM ESTSevere Thunderstorm WarningAKQ29 min
Mar 7, 3:00 PM ESTWind AdvisoryAKQ30 hr
Mar 8, 12:44 PM ESTMesoscale DiscussionSPC61 min
Mar 19, 11:28 PM EDTMesoscale DiscussionSPC62 min
Apr 15, 3:13 PM EDTFreeze WarningAKQ17 hr
Apr 16, 3:28 PM EDTFrost AdvisoryAKQ17 hr
Apr 20, 12:23 PM EDTFlash Flood WatchAKQ12 hr
Apr 20, 5:59 PM EDTAreal Flood AdvisoryAKQ4 hr
Apr 20, 7:14 PM EDTMesoscale DiscussionSPC61 min
May 8, 8:38 PM EDTTornado WatchSPC6 hr
May 8, 9:47 PM EDTMesoscale DiscussionSPC58 min
May 9, 2:32 AM EDTMesoscale DiscussionSPC88 min
May 9, 4:49 AM EDTAreal Flood AdvisoryAKQ3 hr
May 11, 2:07 PM EDTTornado WatchSPC6 hr
May 11, 6:12 PM EDTAreal Flood AdvisoryAKQ3 hr
May 16, 2:20 PM EDTMesoscale DiscussionSPC55 min
May 20, 12:34 PM EDTMesoscale DiscussionSPC56 min
May 20, 1:09 PM EDTSevere Thunderstorm WatchSPC7 hr
May 31, 12:05 PM EDTMesoscale DiscussionSPC55 min
May 31, 3:07 PM EDTTornado WatchSPC6 hr
May 31, 3:57 PM EDTSevere Thunderstorm WarningAKQ63 min
Jun 1, 6:58 PM EDTMesoscale DiscussionSPC92 min
Jun 3, 6:09 PM EDTSevere Thunderstorm WarningAKQ33 min
Jun 4, 12:18 AM EDTMesoscale DiscussionSPC87 min
Jun 4, 2:26 AM EDTTornado WatchSPC6 hr
Jun 4, 7:23 AM EDTMesoscale DiscussionSPC97 min
Jun 4, 12:49 PM EDTTornado WatchSPC7 hr
Jun 4, 7:34 PM EDTTornado WatchSPC5 hr
Jun 5, 4:12 AM EDTHeat AdvisoryAKQ16 hr
Jun 6, 3:35 AM EDTHeat AdvisoryAKQ16 hr
Jun 6, 2:34 PM EDTMesoscale DiscussionSPC2 hr
Jun 6, 3:13 PM EDTHeat AdvisoryAKQ4 days
Jun 10, 2:27 PM EDTMesoscale DiscussionSPC63 min
Jun 14, 12:10 PM EDTMesoscale DiscussionSPC95 min
Jun 16, 12:54 PM EDTMesoscale DiscussionSPC2 hr
Jun 16, 4:35 PM EDTSevere Thunderstorm WatchSPC3 hr
Jun 16, 5:47 PM EDTSevere Thunderstorm WarningAKQ33 min
Jun 16, 6:55 PM EDTMesoscale DiscussionSPC95 min
Jun 27, 11:37 AM EDTMesoscale DiscussionSPC2 hr
Jun 27, 12:40 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 27, 4:12 PM EDTMesoscale DiscussionSPC63 min
Jun 29, 4:37 PM EDTSevere Thunderstorm WatchSPC9 hr
Jun 29, 9:30 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 7:52 PM EDTMesoscale DiscussionSPC113 min
Jul 4, 3:48 PM EDTMesoscale DiscussionSPC117 min
Jul 5, 9:02 PM EDTAreal Flood AdvisoryAKQ118 min
Jul 6, 8:54 PM EDTTornado WarningAKQ35 min
Jul 7, 7:06 PM EDTSevere Thunderstorm WarningAKQ39 min
Jul 8, 2:46 AM EDTMesoscale DiscussionSPC2 hr
Jul 8, 12:34 PM EDTMesoscale DiscussionSPC86 min
Jul 8, 1:03 PM EDTSevere Thunderstorm WatchSPC9 hr
Jul 8, 3:34 PM EDTSevere Thunderstorm WarningAKQ56 min
Jul 9, 4:37 PM EDTSevere Thunderstorm WatchSPC5 hr
Jul 9, 6:41 PM EDTMesoscale DiscussionSPC94 min
Jul 23, 12:44 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 23, 2:10 PM EDTFlash Flood WatchAKQ16 hr
Jul 23, 3:54 PM EDTMesoscale DiscussionSPC66 min
Jul 23, 8:22 PM EDTMesoscale DiscussionSPC53 min
Jul 27, 1:04 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 27, 1:26 PM EDTMesoscale DiscussionSPC2 hr
Aug 2, 4:05 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 2, 7:09 PM EDTMesoscale DiscussionSPC96 min
Aug 15, 12:50 PM EDTMesoscale DiscussionSPC85 min
Aug 15, 1:18 PM EDTSevere Thunderstorm WatchSPC8 hr
Aug 28, 8:34 AM EDTAreal Flood AdvisoryAKQ116 min
Sep 5, 4:19 AM EDTFlash Flood WatchAKQ36 hr
Sep 6, 11:37 AM EDTAreal Flood AdvisoryAKQ3 hr
Sep 6, 2:20 PM EDTRiver Flood WarningAKQ115 min
Sep 9, 1:41 PM EDTMesoscale DiscussionSPC64 min
Sep 26, 9:38 PM EDTFlash Flood WarningAKQ77 min
Oct 19, 4:17 AM EDTFreeze WarningAKQ29 hr
Oct 22, 3:21 PM EDTFreeze WarningAKQ17 hr
Oct 29, 3:39 PM EDTFreeze WarningAKQ17 hr
Nov 15, 11:07 AM ESTMesoscale DiscussionSPC53 min
Nov 15, 12:22 PM ESTTornado WatchSPC7 hr
Dec 6, 6:04 PM ESTWinter Weather AdvisoryAKQ3 hr
Dec 10, 3:30 PM ESTFlood WatchAKQ33 hr
Dec 18, 8:06 PM ESTDense Fog AdvisoryAKQ13 hr
Dec 31, 4:43 AM ESTWind AdvisoryAKQ17 hr
Dec 31, 11:17 AM ESTRed Flag WarningAKQ7 hr

By product

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

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20072009

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.