Alert archive / Maryland / Cecil County

Weather alerts in Cecil County, Maryland, 2008

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

Cecil County and its neighbors

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

Alerts
121
Warnings
29
Watches
27
Advisories
32
Busiest month
June24 alerts
Busiest day
August 10, 20087 alerts

Over time

By month

Warning verification

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

Cecil County, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings20860%367%30 min
Flash flood warnings10100%0

Each office's whole area, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Philadelphia/Mount Holly: tornado warnings90100%10%
NWS Philadelphia/Mount Holly: severe thunderstorm warnings27312056%26479%26 min
NWS Philadelphia/Mount Holly: flash flood warnings371365%2171%58 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 9, 3:34 AM ESTWind AdvisoryPHI10 hr
Jan 17, 10:35 AM ESTWinter Weather AdvisoryPHI22 hr
Jan 17, 12:53 PM ESTMesoscale DiscussionSPC4 hr
Jan 29, 3:20 PM ESTWind AdvisoryPHI24 hr
Feb 5, 5:04 AM ESTDense Fog AdvisoryPHI6 hr
Feb 6, 9:41 PM ESTMesoscale DiscussionSPC64 min
Feb 9, 3:49 PM ESTWind AdvisoryPHI35 hr
Feb 12, 3:17 AM ESTWinter Weather AdvisoryPHI22 hr
Feb 12, 4:15 PM ESTMesoscale DiscussionSPC6 hr
Feb 20, 12:33 PM ESTSnow AdvisoryPHI8 hr
Feb 21, 9:58 AM ESTWinter Storm WatchPHI6 hr
Feb 21, 3:59 PM ESTWinter Weather AdvisoryPHI29 hr
Feb 22, 12:40 AM ESTMesoscale DiscussionSPC6 hr
Feb 22, 7:01 AM ESTMesoscale DiscussionSPC6 hr
Mar 3, 2:17 PM ESTFlood WatchPHI44 hr
Mar 5, 12:23 AM ESTMesoscale DiscussionSPC67 min
Mar 5, 1:04 AM ESTSevere Thunderstorm WatchSPC3 hr
Mar 5, 1:44 AM ESTSevere Thunderstorm WarningPHI61 min
Mar 5, 10:14 PM ESTRiver Flood WarningPHI31 hr
Mar 6, 3:22 PM ESTFlood WatchPHI51 hr
Mar 8, 4:40 AM ESTWind AdvisoryPHI27 hr
Mar 8, 3:58 PM ESTHigh Wind WarningPHI6 hr
Mar 8, 6:35 PM ESTCoastal Flood StatementPHI3 hr
Mar 20, 2:59 AM EDTWind AdvisoryPHI36 hr
Apr 5, 2:48 PM EDTCoastal Flood AdvisoryPHI68 hr
Apr 15, 3:15 PM EDTFrost AdvisoryPHI17 hr
Apr 28, 3:25 PM EDTSevere Thunderstorm WarningPHI65 min
Apr 28, 5:22 PM EDTAreal Flood AdvisoryPHI113 min
May 8, 2:47 PM EDTFlood WatchPHI19 hr
May 11, 3:37 AM EDTFlood WatchPHI30 hr
May 11, 3:34 PM EDTCoastal Flood AdvisoryPHI25 hr
May 14, 11:09 AM EDTCoastal Flood AdvisoryPHI15 hr
May 31, 8:54 AM EDTMesoscale DiscussionSPC96 min
May 31, 10:20 AM EDTTornado WatchSPC7 hr
May 31, 10:25 AM EDTTornado WatchSPC7 hr
Jun 4, 2:53 PM EDTTornado WatchSPC5 hr
Jun 4, 3:17 PM EDTSevere Thunderstorm WarningPHI58 min
Jun 4, 4:14 PM EDTSevere Thunderstorm WarningPHI61 min
Jun 4, 9:51 PM EDTAreal Flood WarningPHI4 hr
Jun 5, 4:34 AM EDTExcessive Heat WatchPHI71 hr
Jun 6, 3:59 PM EDTHeat AdvisoryPHI4 days
Jun 8, 11:56 AM EDTMesoscale DiscussionSPC2 hr
Jun 10, 4:52 PM EDTMesoscale DiscussionSPC53 min
Jun 10, 5:47 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 10, 6:51 PM EDTMesoscale DiscussionSPC54 min
Jun 14, 6:15 PM EDTSevere Thunderstorm WarningPHI75 min
Jun 14, 6:28 PM EDTFlash Flood WarningPHI60 min
Jun 16, 12:54 PM EDTMesoscale DiscussionSPC2 hr
Jun 16, 1:21 PM EDTSevere Thunderstorm WatchSPC10 hr
Jun 16, 4:41 PM EDTSevere Thunderstorm WarningPHI34 min
Jun 22, 4:28 PM EDTMesoscale DiscussionSPC92 min
Jun 23, 8:30 PM EDTMesoscale DiscussionSPC60 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 28, 9:35 PM EDTSevere Thunderstorm WarningPHI70 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 20, 10:13 PM EDTSevere Thunderstorm WarningPHI62 min
Jul 22, 9:46 AM EDTMesoscale DiscussionSPC59 min
Jul 23, 12:30 AM EDTSevere Thunderstorm WarningPHI45 min
Jul 23, 1:11 AM EDTSevere Thunderstorm WarningPHI64 min
Jul 23, 3:51 AM EDTFlash Flood WatchPHI25 hr
Jul 23, 2:34 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 23, 7:14 PM EDTSevere Thunderstorm WarningPHI61 min
Jul 23, 8:01 PM EDTAreal Flood AdvisoryPHI3 hr
Jul 23, 9:26 PM EDTMesoscale DiscussionSPC64 min
Jul 27, 11:03 AM EDTMesoscale DiscussionSPC57 min
Jul 27, 11:26 AM EDTSevere Thunderstorm WatchSPC8 hr
Jul 27, 2:00 PM EDTSevere Thunderstorm WarningPHI60 min
Jul 27, 3:41 PM EDTMesoscale DiscussionSPC2 hr
Jul 30, 2:23 PM EDTMesoscale DiscussionSPC97 min
Jul 30, 4:53 PM EDTSevere Thunderstorm WatchSPC4 hr
Jul 30, 6:44 PM EDTSevere Thunderstorm WarningPHI35 min
Jul 30, 7:47 PM EDTMesoscale DiscussionSPC88 min
Aug 2, 10:39 AM EDTSevere Thunderstorm WatchSPC9 hr
Aug 2, 4:32 PM EDTSevere Thunderstorm WarningPHI58 min
Aug 7, 5:42 PM EDTMesoscale DiscussionSPC63 min
Aug 10, 10:27 AM EDTMesoscale DiscussionSPC33 min
Aug 10, 10:46 AM EDTSevere Thunderstorm WatchSPC10 hr
Aug 10, 1:05 PM EDTMesoscale DiscussionSPC85 min
Aug 10, 5:45 PM EDTSevere Thunderstorm WarningPHI75 min
Aug 10, 5:59 PM EDTAreal Flood AdvisoryPHI2 hr
Aug 10, 6:14 PM EDTSevere Thunderstorm WarningPHI61 min
Aug 10, 6:36 PM EDTSevere Thunderstorm WarningPHI69 min
Aug 14, 6:15 PM EDTMesoscale DiscussionSPC60 min
Aug 14, 6:55 PM EDTSevere Thunderstorm WarningPHI49 min
Sep 4, 5:00 AM EDTTropical Storm WatchNHC48 hr
Sep 4, 3:00 PM EDTFlood WatchPHI57 hr
Sep 4, 5:00 PM EDTTropical Storm WarningNHC60 hr
Sep 4, 5:51 PM EDTTropical Storm WatchPHI19 hr
Sep 5, 12:44 PM EDTTropical Storm WarningPHI24 hr
Sep 6, 4:22 PM EDTAreal Flood WarningPHI6 hr
Sep 9, 8:35 AM EDTMesoscale DiscussionSPC115 min
Sep 9, 9:21 AM EDTSevere Thunderstorm WarningPHI39 min
Sep 9, 9:33 AM EDTSevere Thunderstorm WatchSPC6 hr
Sep 9, 12:11 PM EDTMesoscale DiscussionSPC94 min
Oct 19, 3:04 AM EDTFrost AdvisoryPHI30 hr
Oct 20, 12:56 PM EDTCoastal Flood AdvisoryPHI14 hr
Oct 20, 3:53 PM EDTFire Weather WatchPHI18 hr
Oct 23, 4:30 AM EDTFreeze WarningPHI29 hr
Oct 24, 2:45 PM EDTCoastal Flood AdvisoryPHI24 hr
Oct 27, 2:45 PM EDTWind AdvisoryPHI36 hr
Nov 14, 1:28 AM ESTDense Fog AdvisoryPHI8 hr
Nov 15, 12:22 PM ESTTornado WatchSPC7 hr
Nov 15, 4:15 PM ESTSevere Thunderstorm WarningPHI30 min
Nov 21, 7:45 AM ESTWinter Weather AdvisoryPHI6 hr
Dec 1, 2:07 PM ESTCoastal Flood StatementPHI8 hr
Dec 7, 2:57 AM ESTWind AdvisoryPHI18 hr
Dec 10, 3:28 PM ESTFlood WatchPHI42 hr
Dec 11, 7:46 PM ESTAreal Flood AdvisoryPHI9 hr
Dec 11, 9:47 PM ESTAreal Flood AdvisoryPHI6 hr
Dec 20, 2:44 PM ESTWinter Weather AdvisoryPHI22 hr
Dec 20, 11:55 PM ESTMesoscale DiscussionSPC4 hr
Dec 21, 6:35 AM ESTMesoscale DiscussionSPC4 hr
Dec 21, 2:08 PM ESTWind AdvisoryPHI23 hr
Dec 23, 1:49 PM ESTWinter Weather AdvisoryPHI22 hr
Dec 27, 3:32 PM ESTDense Fog AdvisoryPHI15 hr
Dec 31, 5:01 AM ESTHigh Wind WarningPHI14 hr
Dec 31, 3:27 PM ESTWind AdvisoryPHI7 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.