Alert archive / Maryland / Washington County

Weather alerts in Washington County, Maryland, 2013

130 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Washington County and its neighbors

Each county as a circle sized by its count in 2013. Tap one for its archive.

Alerts
130
Warnings
35
Watches
25
Advisories
24
Busiest month
June29 alerts
Busiest day
June 13, 20137 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 Washington County in 2013 had a tornado report inside them.

Washington County, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings251444%12100%23 min
Flash flood warnings00

Each office's whole area, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Baltimore/Washington: tornado warnings22959%2162%11 min
NWS Baltimore/Washington: severe thunderstorm warnings21014133%49574%21 min
NWS Baltimore/Washington: flash flood warnings815137%12478%74 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 11, 4:39 PM ESTDense Fog AdvisoryLWX19 hr
Jan 12, 7:27 PM ESTDense Fog AdvisoryLWX18 hr
Jan 15, 1:13 PM ESTWinter Weather AdvisoryLWX22 hr
Jan 24, 7:52 PM ESTWinter Weather AdvisoryLWX46 hr
Jan 27, 4:02 AM ESTWinter Weather AdvisoryLWX32 hr
Jan 29, 2:54 PM ESTWind AdvisoryLWX47 hr
Jan 30, 4:07 AM ESTFlash Flood WatchLWX21 hr
Jan 30, 10:19 AM ESTMesoscale DiscussionSPC86 min
Jan 30, 12:54 PM ESTMesoscale DiscussionSPC96 min
Jan 30, 1:14 PM ESTSpecial Weather StatementLWX46 min
Feb 4, 10:23 AM ESTWinter Weather AdvisoryLWX20 hr
Feb 7, 3:09 PM ESTWinter Weather AdvisoryLWX19 hr
Feb 8, 1:26 PM ESTWind AdvisoryLWX17 hr
Feb 22, 3:27 AM ESTWinter Weather AdvisoryLWX30 hr
Feb 25, 2:34 PM ESTWinter Weather AdvisoryLWX27 hr
Mar 4, 3:11 AM ESTWinter Storm WatchLWX36 hr
Mar 4, 8:48 PM ESTWinter Storm WarningLWX42 hr
Mar 5, 10:52 PM ESTMesoscale DiscussionSPC6 hr
Mar 6, 3:25 AM ESTMesoscale DiscussionSPC4 hr
Mar 17, 3:27 PM EDTWinter Weather AdvisoryLWX17 hr
Mar 18, 8:46 AM EDTWinter Weather AdvisoryLWX17 hr
Mar 19, 3:02 AM EDTFreezing Rain AdvisoryLWX3 hr
Mar 23, 8:45 PM EDTWinter Storm WarningLWX39 hr
Mar 24, 4:26 AM EDTWinter Weather AdvisoryLWX38 hr
Mar 25, 5:31 AM EDTMesoscale DiscussionSPC6 hr
Apr 2, 3:32 PM EDTFire Weather WatchLWX13 hr
Apr 3, 4:30 AM EDTRed Flag WarningLWX16 hr
Apr 10, 11:11 PM EDTMesoscale DiscussionSPC94 min
Apr 19, 1:27 PM EDTMesoscale DiscussionSPC63 min
Apr 19, 2:31 PM EDTTornado WatchSPC7 hr
Apr 19, 4:36 PM EDTMesoscale DiscussionSPC114 min
Apr 19, 5:33 PM EDTSpecial Weather StatementLWX57 min
Apr 24, 3:36 PM EDTMesoscale DiscussionSPC84 min
Apr 24, 4:41 PM EDTSpecial Weather StatementLWX49 min
Apr 24, 4:59 PM EDTSevere Thunderstorm WarningLWX31 min
Apr 24, 6:44 PM EDTSpecial Weather StatementLWX31 min
May 8, 2:39 PM EDTSpecial Weather StatementLWX36 min
May 8, 3:13 PM EDTSpecial Weather StatementLWX32 min
May 8, 3:56 PM EDTSpecial Weather StatementLWX34 min
May 8, 4:24 PM EDTSpecial Weather StatementLWX36 min
May 12, 1:53 PM EDTFreeze WatchLWX25 hr
May 12, 4:35 PM EDTFrost AdvisoryLWX15 hr
May 13, 3:15 PM EDTFreeze WarningLWX17 hr
May 22, 3:53 PM EDTMesoscale DiscussionSPC67 min
May 22, 5:25 PM EDTSevere Thunderstorm WarningLWX50 min
May 22, 6:20 PM EDTMesoscale DiscussionSPC85 min
May 22, 6:23 PM EDTSevere Thunderstorm WarningLWX37 min
May 23, 3:37 PM EDTMesoscale DiscussionSPC53 min
May 23, 5:44 PM EDTSevere Thunderstorm WarningLWX61 min
May 23, 6:16 PM EDTSevere Thunderstorm WarningLWX44 min
Jun 2, 3:08 PM EDTSevere Thunderstorm WarningLWX37 min
Jun 10, 2:02 PM EDTTornado WatchSPC10 hr
Jun 10, 4:38 PM EDTMesoscale DiscussionSPC97 min
Jun 10, 5:22 PM EDTSevere Thunderstorm WarningLWX23 min
Jun 10, 5:42 PM EDTSevere Thunderstorm WarningLWX48 min
Jun 12, 1:50 PM EDTFlash Flood WatchLWX30 hr
Jun 13, 2:40 AM EDTMesoscale DiscussionSPC2 hr
Jun 13, 3:58 AM EDTSevere Thunderstorm WatchSPC7 hr
Jun 13, 5:27 AM EDTMesoscale DiscussionSPC2 hr
Jun 13, 6:26 AM EDTSevere Thunderstorm WarningLWX49 min
Jun 13, 6:53 AM EDTSevere Thunderstorm WarningLWX52 min
Jun 13, 7:26 AM EDTSevere Thunderstorm WarningLWX49 min
Jun 13, 7:52 AM EDTSevere Thunderstorm WarningLWX38 min
Jun 24, 1:19 PM EDTSevere Thunderstorm WarningLWX56 min
Jun 24, 1:48 PM EDTMesoscale DiscussionSPC57 min
Jun 25, 5:27 PM EDTMesoscale DiscussionSPC93 min
Jun 25, 6:20 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 25, 8:57 PM EDTSevere Thunderstorm WarningLWX48 min
Jun 25, 9:20 PM EDTSevere Thunderstorm WarningLWX40 min
Jun 25, 9:37 PM EDTSevere Thunderstorm WarningLWX38 min
Jun 26, 1:19 PM EDTMesoscale DiscussionSPC2 hr
Jun 27, 1:04 PM EDTMesoscale DiscussionSPC116 min
Jun 27, 1:51 PM EDTSevere Thunderstorm WarningLWX24 min
Jun 27, 1:58 PM EDTTornado WatchSPC7 hr
Jun 28, 1:02 PM EDTMesoscale DiscussionSPC118 min
Jun 28, 1:09 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 28, 3:30 PM EDTMesoscale DiscussionSPC2 hr
Jun 28, 7:11 PM EDTMesoscale DiscussionSPC64 min
Jun 30, 11:48 AM EDTMesoscale DiscussionSPC2 hr
Jul 7, 12:48 PM EDTMesoscale DiscussionSPC117 min
Jul 7, 1:16 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 7, 2:13 PM EDTSevere Thunderstorm WarningLWX47 min
Jul 7, 3:19 PM EDTMesoscale DiscussionSPC116 min
Jul 7, 3:46 PM EDTSevere Thunderstorm WarningLWX44 min
Jul 7, 4:04 PM EDTSevere Thunderstorm WarningLWX41 min
Jul 12, 3:46 AM EDTFlash Flood WatchLWX14 hr
Jul 19, 6:09 PM EDTMesoscale DiscussionSPC2 hr
Jul 19, 6:28 PM EDTSevere Thunderstorm WarningLWX62 min
Jul 20, 12:28 PM EDTSevere Thunderstorm WarningLWX47 min
Jul 20, 1:07 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 22, 1:18 PM EDTMesoscale DiscussionSPC87 min
Jul 27, 5:25 PM EDTMesoscale DiscussionSPC95 min
Aug 4, 3:33 AM EDTDense Fog AdvisoryLWX4 hr
Aug 7, 5:52 PM EDTMesoscale DiscussionSPC83 min
Aug 13, 1:36 AM EDTFlash Flood WatchLWX10 hr
Aug 20, 2:49 AM EDTDense Fog AdvisoryLWX7 hr
Sep 12, 1:29 PM EDTMesoscale DiscussionSPC91 min
Sep 12, 2:50 PM EDTSevere Thunderstorm WatchSPC6 hr
Oct 7, 8:38 AM EDTTornado WarningLWX37 min
Oct 7, 8:56 AM EDTTornado WatchSPC8 hr
Oct 20, 1:13 PM EDTFrost AdvisoryLWX19 hr
Oct 23, 1:28 PM EDTFreeze WatchLWX24 hr
Oct 24, 1:34 PM EDTFreeze WarningLWX19 hr
Oct 31, 12:53 PM EDTWind AdvisoryLWX22 hr
Nov 1, 3:37 AM EDTMesoscale DiscussionSPC83 min
Nov 1, 4:17 AM EDTSevere Thunderstorm WatchSPC4 hr
Nov 1, 5:28 AM EDTSevere Thunderstorm WarningLWX62 min
Nov 1, 5:41 AM EDTMesoscale DiscussionSPC94 min
Nov 1, 6:16 AM EDTSevere Thunderstorm WarningLWX44 min
Nov 17, 11:08 PM ESTMesoscale DiscussionSPC67 min
Nov 17, 11:31 PM ESTSevere Thunderstorm WatchSPC2 hr
Nov 18, 12:16 AM ESTSevere Thunderstorm WarningLWX59 min
Nov 23, 11:05 AM ESTFire Weather WatchLWX17 hr
Nov 24, 3:23 AM ESTRed Flag WarningLWX15 hr
Nov 25, 9:58 AM ESTWinter Weather AdvisoryLWX62 hr
Nov 26, 10:25 AM ESTMesoscale DiscussionSPC6 hr
Nov 27, 4:38 AM ESTWind AdvisoryLWX19 hr
Dec 6, 12:07 PM ESTWinter Storm WatchLWX32 hr
Dec 7, 8:34 PM ESTWinter Storm WarningLWX36 hr
Dec 8, 11:05 AM ESTMesoscale DiscussionSPC3 hr
Dec 8, 2:30 PM ESTMesoscale DiscussionSPC2 hr
Dec 9, 10:09 AM ESTWinter Storm WatchLWX4 hr
Dec 9, 2:29 PM ESTWinter Weather AdvisoryLWX21 hr
Dec 9, 5:22 PM ESTDense Fog AdvisoryLWX10 hr
Dec 9, 8:54 PM ESTWinter Storm WarningLWX15 hr
Dec 10, 4:37 AM ESTMesoscale DiscussionSPC4 hr
Dec 13, 4:21 AM ESTWinter Storm WatchLWX10 hr
Dec 13, 2:33 PM ESTWinter Storm WarningLWX34 hr
Dec 22, 3:37 AM ESTSevere Thunderstorm WatchSPC5 hr
Dec 22, 6:14 AM ESTMesoscale DiscussionSPC61 min

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 archive20122014

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.