Alert archive / Maryland

Weather alerts in Caroline County, Maryland

3,528 weather alerts since 1986, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Caroline County and its neighbors

Each county as a circle sized by its count since 1986. Tap one for its archive.

Alerts
3,528
Warnings
904
Watches
529
Advisories
854
Busiest year
2011273 alerts
Average year
93over 38 years on file

Over time

By year

Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.

By month of the year

Warning verification

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

From 2008 to 2025, 100% of tornado reports in Caroline County fell inside a tornado warning issued on average 2 minutes before, and 84% of the tornado warnings had no report inside them.

Tornado warnings by year

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
200820100%0
201020100%0
201210100%0
201610100%0
201940100%0
20204325%2100%2 min
202120100%0
202310100%0
202520100%0

Severe thunderstorm warnings by year

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
2008231248%667%30 min
2009161131%650%28 min
2010321650%5100%27 min
201131971%4100%30 min
2012201335%6100%31 min
201311736%0
201416756%786%25 min
201516850%0
2016291259%333%50 min
2017391951%7100%30 min
201811827%0
2019412832%1191%20 min
2020332718%2488%26 min
2021301453%786%10 min
2022261735%11100%18 min
2023392244%6100%21 min
20249544%5100%23 min
2025371754%10100%32 min

Flash flood warnings by year

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
20095260%1100%21 min
20114175%0
20123233%1100%33 min
20134250%0
201420100%0
20168450%0
201730100%0
201880100%0
20205420%0
202110100%0
202210100%0
20232150%0
202420100%0
202510100%0

Years from 2008, the first full year of storm-based warnings. The year still running is on its own page.

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.

By product

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

The latest warnings

The most recent on file, newest first.

IssuedProductOfficeLasted
Sep 4, 12:52 AM EDTSevere Thunderstorm WarningPHI53 min
Sep 4, 12:18 AM EDTSevere Thunderstorm Warning Destructive damage threatPHI42 min
Sep 3, 11:59 PM EDTSevere Thunderstorm Warning Considerable damage threatPHI61 min
Sep 3, 12:02 AM EDTSevere Thunderstorm WarningPHI43 min
Sep 2, 2:38 PM EDTSevere Thunderstorm WarningPHI47 min
Sep 2, 2:05 PM EDTSevere Thunderstorm WarningPHI40 min
Sep 2, 1:43 PM EDTSevere Thunderstorm WarningPHI47 min
Sep 1, 9:40 PM EDTSevere Thunderstorm WarningPHI65 min
Aug 20, 6:57 PM EDTSevere Thunderstorm WarningPHI48 min
Aug 20, 6:53 PM EDTFlash Flood Warning Considerable damage threatPHI105 min
Aug 20, 6:21 PM EDTSevere Thunderstorm WarningPHI39 min
Aug 20, 5:40 PM EDTSevere Thunderstorm WarningPHI50 min

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive

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.