Alert archive / Maryland / Calvert County

Weather alerts in Calvert County, Maryland, 2022

128 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Calvert County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts
128
Warnings
33
Watches
19
Advisories
40
Busiest month
July32 alerts
Busiest day
May 27, 20226 alerts

Over time

By month

Warning verification

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

2 of 3 tornado warnings covering Calvert County in 2022 had a tornado report inside them.

Calvert County, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings3233%0
Severe thunderstorm warnings261638%3376%31 min
Flash flood warnings00

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Baltimore/Washington: tornado warnings38684%1080%9 min
NWS Baltimore/Washington: severe thunderstorm warnings41330027%1,17778%21 min
NWS Baltimore/Washington: flash flood warnings773456%8488%90 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 1, 1:48 AM ESTCoastal Flood AdvisoryLWX20 hr
Jan 2, 4:28 AM ESTWinter Storm WatchLWX8 hr
Jan 2, 4:28 AM ESTWinter Storm WarningLWX36 hr
Jan 3, 11:06 AM ESTMesoscale DiscussionSPC5 hr
Jan 4, 2:41 PM ESTWinter Weather AdvisoryLWX18 hr
Jan 5, 2:33 PM ESTWinter Weather AdvisoryLWX39 hr
Jan 7, 2:02 AM ESTMesoscale DiscussionSPC5 hr
Jan 15, 12:30 PM ESTWinter Weather AdvisoryLWX34 hr
Jan 16, 8:14 PM ESTCoastal Flood AdvisoryLWX21 hr
Jan 16, 8:33 PM ESTWind AdvisoryLWX22 hr
Jan 16, 10:43 PM ESTSevere Thunderstorm WarningLWX47 min
Jan 27, 2:28 PM ESTWinter Weather AdvisoryLWX45 hr
Feb 17, 3:49 AM ESTWind AdvisoryLWX30 hr
Feb 18, 2:18 PM ESTWind AdvisoryLWX29 hr
Mar 6, 7:27 PM ESTWind AdvisoryLWX30 hr
Mar 11, 3:26 PM ESTWind AdvisoryLWX34 hr
Mar 17, 11:16 PM EDTDense Fog AdvisoryLWX4 min
Mar 17, 11:20 PM EDTDense Fog AdvisoryLWX11 hr
Mar 31, 1:41 PM EDTWind AdvisoryLWX6 hr
Mar 31, 2:01 PM EDTSevere Thunderstorm WatchSPC8 hr
Mar 31, 7:13 PM EDTMesoscale DiscussionSPC92 min
Apr 14, 5:40 PM EDTMesoscale DiscussionSPC3 hr
Apr 16, 6:45 PM EDTMesoscale DiscussionSPC90 min
Apr 26, 2:25 PM EDTSevere Thunderstorm WatchSPC5 hr
May 8, 9:07 PM EDTCoastal Flood AdvisoryLWX4 days
May 14, 2:16 AM EDTDense Fog AdvisoryLWX8 hr
May 14, 10:45 PM EDTDense Fog AdvisoryLWX10 hr
May 16, 12:01 PM EDTMesoscale DiscussionSPC119 min
May 16, 2:23 PM EDTMesoscale DiscussionSPC2 hr
May 16, 3:40 PM EDTSevere Thunderstorm WatchSPC5 hr
May 16, 4:35 PM EDTSevere Thunderstorm Warning Considerable damage threatLWX40 min
May 22, 1:53 PM EDTSevere Thunderstorm WatchSPC7 hr
May 22, 6:32 PM EDTMesoscale DiscussionSPC118 min
May 22, 6:37 PM EDTSevere Thunderstorm WarningLWX12 min
May 22, 7:26 PM EDTSevere Thunderstorm WarningLWX64 min
May 22, 8:00 PM EDTAreal Flood WarningLWX6 hr
May 22, 8:28 PM EDTSevere Thunderstorm WarningLWX32 min
May 27, 6:24 AM EDTTornado WatchSPC8 hr
May 27, 10:59 AM EDTMesoscale DiscussionSPC91 min
May 27, 12:27 PM EDTSevere Thunderstorm WarningLWX48 min
May 27, 12:45 PM EDTSevere Thunderstorm WarningLWX45 min
May 27, 5:45 PM EDTSevere Thunderstorm WatchSPC4 hr
May 27, 7:22 PM EDTMesoscale DiscussionSPC83 min
May 27, 8:30 PM EDTTornado WarningLWX9 min
May 27, 8:37 PM EDTTornado WarningLWX23 min
May 27, 8:50 PM EDTSevere Thunderstorm WarningLWX30 min
Jun 2, 1:04 PM EDTMesoscale DiscussionSPC116 min
Jun 2, 1:53 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 2, 4:43 PM EDTMesoscale DiscussionSPC92 min
Jun 2, 4:45 PM EDTSevere Thunderstorm WarningLWX47 min
Jun 2, 5:43 PM EDTSevere Thunderstorm WarningLWX47 min
Jun 2, 6:04 PM EDTSevere Thunderstorm WarningLWX41 min
Jun 8, 2:58 PM EDTMesoscale DiscussionSPC2 hr
Jun 8, 8:17 PM EDTSevere Thunderstorm WarningLWX43 min
Jun 8, 8:42 PM EDTTornado WarningLWX33 min
Jun 8, 9:07 PM EDTSevere Thunderstorm Warning Considerable damage threatLWX27 min
Jun 9, 1:39 AM EDTMesoscale DiscussionSPC3 hr
Jun 16, 4:53 PM EDTMesoscale DiscussionSPC97 min
Jul 1, 3:38 PM EDTMesoscale DiscussionSPC2 hr
Jul 2, 1:16 PM EDTMesoscale DiscussionSPC119 min
Jul 2, 3:02 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 2, 4:47 PM EDTMesoscale DiscussionSPC118 min
Jul 5, 1:36 PM EDTMesoscale DiscussionSPC114 min
Jul 5, 5:50 PM EDTMesoscale DiscussionSPC85 min
Jul 12, 6:34 AM EDTFlood WatchLWX18 hr
Jul 12, 2:12 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 12, 4:02 PM EDTMesoscale DiscussionSPC88 min
Jul 12, 5:56 PM EDTSevere Thunderstorm WarningLWX64 min
Jul 12, 6:11 PM EDTMesoscale DiscussionSPC2 hr
Jul 12, 8:29 PM EDTSevere Thunderstorm WarningLWX46 min
Jul 12, 9:03 PM EDTSevere Thunderstorm WarningLWX42 min
Jul 13, 12:26 AM EDTSevere Thunderstorm WarningLWX49 min
Jul 16, 1:36 PM EDTMesoscale DiscussionSPC3 hr
Jul 16, 5:36 PM EDTSevere Thunderstorm WarningLWX39 min
Jul 18, 6:57 PM EDTSevere Thunderstorm WarningLWX23 min
Jul 20, 12:51 PM EDTHeat AdvisoryLWX29 hr
Jul 21, 12:38 PM EDTMesoscale DiscussionSPC2 hr
Jul 21, 1:06 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 21, 2:37 PM EDTSevere Thunderstorm WarningLWX38 min
Jul 21, 3:13 PM EDTSevere Thunderstorm WarningLWX47 min
Jul 21, 3:53 PM EDTMesoscale DiscussionSPC2 hr
Jul 23, 1:13 PM EDTHeat AdvisoryLWX31 hr
Jul 25, 10:27 AM EDTHeat AdvisoryLWX8 hr
Jul 25, 1:02 PM EDTMesoscale DiscussionSPC118 min
Jul 25, 1:46 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 25, 4:01 PM EDTMesoscale DiscussionSPC119 min
Jul 25, 5:15 PM EDTSevere Thunderstorm WarningLWX60 min
Jul 28, 2:45 AM EDTHeat AdvisoryLWX16 hr
Jul 29, 12:24 PM EDTMesoscale DiscussionSPC2 hr
Jul 29, 1:31 PM EDTSevere Thunderstorm WatchSPC5 hr
Aug 3, 1:02 PM EDTHeat AdvisoryLWX31 hr
Aug 4, 6:09 PM EDTSevere Thunderstorm WarningLWX26 min
Aug 4, 7:15 PM EDTSevere Thunderstorm WarningLWX45 min
Aug 5, 10:20 AM EDTFlood WatchLWX11 hr
Aug 5, 2:37 PM EDTMesoscale DiscussionSPC113 min
Aug 5, 6:29 PM EDTSevere Thunderstorm WarningLWX31 min
Aug 9, 2:18 AM EDTHeat AdvisoryLWX17 hr
Aug 10, 3:07 AM EDTFlood WatchLWX20 hr
Aug 10, 1:01 PM EDTMesoscale DiscussionSPC3 hr
Aug 10, 6:14 PM EDTSevere Thunderstorm WarningLWX29 min
Aug 21, 9:59 PM EDTAreal Flood WarningLWX6 hr
Aug 22, 4:10 PM EDTMesoscale DiscussionSPC3 hr
Aug 30, 1:55 PM EDTMesoscale DiscussionSPC2 hr
Sep 7, 10:41 PM EDTCoastal Flood AdvisoryLWX19 hr
Sep 8, 8:34 PM EDTCoastal Flood AdvisoryLWX4 days
Sep 12, 2:22 PM EDTMesoscale DiscussionSPC2 hr
Sep 12, 5:46 PM EDTMesoscale DiscussionSPC119 min
Sep 25, 11:37 AM EDTSevere Thunderstorm WatchSPC6 hr
Sep 25, 2:35 PM EDTMesoscale DiscussionSPC115 min
Sep 30, 4:03 AM EDTCoastal Flood AdvisoryLWX47 hr
Sep 30, 10:00 AM EDTWind AdvisoryLWX24 hr
Oct 2, 3:14 AM EDTWind AdvisoryLWX30 hr
Oct 18, 12:36 PM EDTFrost AdvisoryLWX20 hr
Oct 19, 1:32 PM EDTFrost AdvisoryLWX19 hr
Oct 20, 1:59 PM EDTFrost AdvisoryLWX19 hr
Nov 4, 5:30 AM EDTDense Fog AdvisoryLWX2 hr
Nov 4, 7:51 AM EDTDense Fog AdvisoryLWX2 hr
Nov 4, 10:41 AM EDTDense Fog AdvisoryLWX79 min
Nov 11, 2:30 PM ESTMesoscale DiscussionSPC2 hr
Nov 12, 2:43 PM ESTFreeze WatchLWX13 hr
Nov 13, 3:58 AM ESTFreeze WarningLWX29 hr
Dec 15, 2:00 AM ESTCoastal Flood AdvisoryLWX33 hr
Dec 16, 1:56 AM ESTCoastal Flood AdvisoryLWX7 hr
Dec 21, 3:22 PM ESTFlood WatchLWX34 hr
Dec 22, 12:37 PM ESTWind AdvisoryLWX29 hr
Dec 22, 2:05 PM ESTCoastal Flood AdvisoryLWX27 hr
Dec 22, 2:55 PM ESTWind Chill AdvisoryLWX67 hr
Dec 31, 5:56 AM ESTDense Fog AdvisoryLWX16 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 archive20212023

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.