Alert archive / Pennsylvania / Lancaster County

Weather alerts in Lancaster County, Pennsylvania, 2008

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

Lancaster County and its neighbors

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

Alerts
156
Warnings
45
Watches
27
Advisories
49
Busiest month
June31 alerts
Busiest day
June 10, 20089 alerts

Over time

By month

Warning verification

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

Lancaster County, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings341071%1457%42 min
Flash flood warnings110%2100%94 min

Each office's whole area, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings50100%20%
NWS State College, PA: severe thunderstorm warnings1848653%17984%26 min
NWS State College, PA: flash flood warnings4325%1331%88 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 8, 3:19 PM ESTWind AdvisoryCTP19 hr
Jan 17, 3:27 AM ESTWinter Weather AdvisoryCTP24 hr
Jan 17, 12:53 PM ESTMesoscale DiscussionSPC4 hr
Jan 28, 2:01 PM ESTFreezing Rain AdvisoryCTP20 hr
Jan 29, 10:36 AM ESTWind AdvisoryCTP29 hr
Jan 31, 2:17 PM ESTWinter Storm WarningCTP29 hr
Jan 31, 2:17 PM ESTWinter Weather AdvisoryCTP17 hr
Feb 6, 2:55 AM ESTDense Fog AdvisoryCTP5 hr
Feb 6, 9:41 PM ESTMesoscale DiscussionSPC64 min
Feb 6, 9:50 PM ESTSevere Thunderstorm WarningCTP55 min
Feb 9, 4:06 AM ESTWind AdvisoryCTP42 hr
Feb 11, 3:59 AM ESTWinter Storm WatchCTP12 hr
Feb 11, 3:58 PM ESTWinter Weather AdvisoryCTP44 hr
Feb 12, 1:06 PM ESTMesoscale DiscussionSPC6 hr
Feb 12, 4:15 PM ESTMesoscale DiscussionSPC6 hr
Feb 12, 10:01 PM ESTIce Storm WarningCTP17 hr
Feb 13, 1:31 AM ESTMesoscale DiscussionSPC6 hr
Feb 21, 3:21 AM ESTWinter Storm WatchCTP11 hr
Feb 21, 2:45 PM ESTWinter Weather AdvisoryCTP42 hr
Feb 22, 12:40 AM ESTMesoscale DiscussionSPC6 hr
Feb 22, 7:01 AM ESTMesoscale DiscussionSPC6 hr
Mar 3, 5:25 AM ESTFlood WatchCTP54 hr
Mar 5, 3:26 AM ESTRiver Flood WarningCTP13 hr
Mar 5, 2:51 PM ESTRiver Flood WarningCTP28 hr
Mar 5, 4:05 PM ESTRiver Flood WarningCTP43 hr
Mar 7, 3:34 AM ESTFlood WatchCTP38 hr
Mar 8, 10:04 AM ESTHigh Wind WarningCTP11 hr
Mar 8, 10:04 AM ESTWind AdvisoryCTP17 hr
Mar 19, 9:04 PM EDTWind AdvisoryCTP16 hr
Apr 15, 3:35 AM EDTFrost AdvisoryCTP16 hr
Apr 15, 7:55 PM EDTFreeze WarningCTP12 hr
Apr 16, 9:04 PM EDTFrost AdvisoryCTP11 hr
Apr 19, 4:56 PM EDTRed Flag WarningCTP6 hr
Apr 29, 2:33 PM EDTFrost AdvisoryCTP18 hr
May 8, 2:47 PM EDTFlood WatchCTP19 hr
May 11, 4:17 AM EDTFlood WatchCTP32 hr
May 27, 7:14 PM EDTMesoscale DiscussionSPC61 min
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, 12:49 PM EDTTornado WatchSPC7 hr
Jun 6, 3:59 AM EDTExcessive Heat WatchCTP64 hr
Jun 7, 7:55 AM EDTHeat AdvisoryCTP11 hr
Jun 8, 3:33 AM EDTHeat AdvisoryCTP40 hr
Jun 8, 11:56 AM EDTMesoscale DiscussionSPC2 hr
Jun 10, 2:27 PM EDTMesoscale DiscussionSPC63 min
Jun 10, 2:54 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 10, 4:52 PM EDTMesoscale DiscussionSPC53 min
Jun 10, 5:31 PM EDTSevere Thunderstorm WarningCTP59 min
Jun 10, 5:52 PM EDTAreal Flood AdvisoryCTP3 hr
Jun 10, 6:01 PM EDTSevere Thunderstorm WarningCTP59 min
Jun 10, 6:24 PM EDTSevere Thunderstorm WarningCTP66 min
Jun 10, 6:51 PM EDTMesoscale DiscussionSPC54 min
Jun 10, 6:56 PM EDTSevere Thunderstorm WarningCTP64 min
Jun 14, 5:02 PM EDTAreal Flood AdvisoryCTP3 hr
Jun 16, 12:54 PM EDTMesoscale DiscussionSPC2 hr
Jun 16, 1:21 PM EDTSevere Thunderstorm WatchSPC10 hr
Jun 16, 6:54 PM EDTSevere Thunderstorm WarningCTP62 min
Jun 16, 11:29 PM EDTSevere Thunderstorm WarningCTP46 min
Jun 22, 2:24 PM EDTSevere Thunderstorm WatchSPC6 hr
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, 2:04 PM EDTMesoscale DiscussionSPC116 min
Jun 29, 4:11 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 29, 7:13 PM EDTMesoscale DiscussionSPC92 min
Jun 29, 8:09 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 29, 9:30 PM EDTMesoscale DiscussionSPC2 hr
Jun 29, 11:58 PM EDTMesoscale DiscussionSPC92 min
Jun 30, 12:15 AM EDTMesoscale DiscussionSPC90 min
Jun 30, 7:52 PM EDTMesoscale DiscussionSPC113 min
Jul 1, 12:19 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 7:29 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 7, 8:30 PM EDTFlash Flood WarningCTP4 hr
Jul 14, 2:12 AM EDTAreal Flood AdvisoryCTP3 hr
Jul 20, 12:35 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 20, 4:28 PM EDTMesoscale DiscussionSPC2 hr
Jul 20, 8:19 PM EDTSevere Thunderstorm WarningCTP26 min
Jul 22, 2:15 PM EDTMesoscale DiscussionSPC2 hr
Jul 23, 1:39 AM EDTSevere Thunderstorm WarningCTP66 min
Jul 23, 2:08 AM EDTSevere Thunderstorm WarningCTP82 min
Jul 23, 12:11 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 23, 3:13 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 23, 3:55 PM EDTSevere Thunderstorm WarningCTP65 min
Jul 23, 9:51 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 24, 12:55 AM EDTAreal Flood AdvisoryCTP4 hr
Jul 27, 11:03 AM EDTMesoscale DiscussionSPC57 min
Jul 27, 11:26 AM EDTSevere Thunderstorm WatchSPC8 hr
Jul 27, 11:58 AM EDTSevere Thunderstorm WarningCTP17 min
Jul 27, 12:00 PM EDTSevere Thunderstorm WarningCTP60 min
Jul 27, 12:36 PM EDTSevere Thunderstorm WarningCTP24 min
Jul 27, 12:54 PM EDTSevere Thunderstorm WarningCTP66 min
Jul 27, 1:21 PM EDTSevere Thunderstorm WarningCTP52 min
Jul 27, 4:52 PM EDTSevere Thunderstorm WarningCTP23 min
Jul 27, 5:45 PM EDTSevere Thunderstorm WarningCTP90 min
Jul 30, 2:23 PM EDTMesoscale DiscussionSPC97 min
Jul 30, 4:53 PM EDTSevere Thunderstorm WatchSPC4 hr
Jul 30, 4:58 PM EDTSevere Thunderstorm WarningCTP62 min
Jul 30, 5:37 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 30, 7:47 PM EDTMesoscale DiscussionSPC88 min
Aug 2, 1:56 PM EDTSevere Thunderstorm WatchSPC8 hr
Aug 2, 2:26 PM EDTSevere Thunderstorm WarningCTP52 min
Aug 2, 4:42 PM EDTSevere Thunderstorm WarningCTP93 min
Aug 2, 7:09 PM EDTMesoscale DiscussionSPC96 min
Aug 7, 5:27 PM EDTSevere Thunderstorm WarningCTP63 min
Aug 7, 5:42 PM EDTMesoscale DiscussionSPC63 min
Aug 10, 12:59 PM EDTSevere Thunderstorm WarningCTP61 min
Aug 10, 1:36 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 10, 2:19 PM EDTSevere Thunderstorm WarningCTP32 min
Aug 10, 3:12 PM EDTSevere Thunderstorm WarningCTP63 min
Aug 10, 4:06 PM EDTMesoscale DiscussionSPC84 min
Aug 10, 4:12 PM EDTSevere Thunderstorm WarningCTP63 min
Aug 10, 5:10 PM EDTSevere Thunderstorm WarningCTP35 min
Aug 13, 9:02 PM EDTAreal Flood AdvisoryCTP88 min
Aug 14, 2:24 PM EDTSevere Thunderstorm WarningCTP66 min
Aug 14, 3:29 PM EDTSevere Thunderstorm WarningCTP31 min
Aug 14, 4:27 PM EDTSevere Thunderstorm WatchSPC5 hr
Aug 14, 4:42 PM EDTSevere Thunderstorm WarningCTP93 min
Aug 14, 5:27 PM EDTSevere Thunderstorm WarningCTP61 min
Aug 14, 5:43 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 14, 6:04 PM EDTSevere Thunderstorm WarningCTP41 min
Aug 14, 6:15 PM EDTMesoscale DiscussionSPC60 min
Sep 5, 10:50 AM EDTFlood WatchCTP33 hr
Sep 5, 3:10 PM EDTWind AdvisoryCTP25 hr
Sep 6, 12:31 PM EDTAreal Flood AdvisoryCTP3 hr
Sep 6, 5:10 PM EDTAreal Flood AdvisoryCTP3 hr
Sep 9, 7:38 AM EDTAreal Flood AdvisoryCTP3 hr
Sep 9, 8:11 AM EDTSevere Thunderstorm WarningCTP44 min
Sep 9, 8:35 AM EDTMesoscale DiscussionSPC115 min
Sep 9, 8:45 AM EDTSevere Thunderstorm WarningCTP75 min
Sep 27, 1:57 PM EDTAreal Flood AdvisoryCTP4 hr
Sep 27, 2:45 PM EDTFlood WatchCTP6 hr
Sep 30, 4:34 AM EDTDense Fog AdvisoryCTP5 hr
Oct 1, 3:33 AM EDTDense Fog AdvisoryCTP6 hr
Oct 6, 3:11 AM EDTFrost AdvisoryCTP29 hr
Oct 18, 3:24 AM EDTFrost AdvisoryCTP30 hr
Oct 19, 3:03 AM EDTFreeze WarningCTP30 hr
Oct 28, 4:25 AM EDTWind AdvisoryCTP23 hr
Nov 14, 1:17 AM ESTDense Fog AdvisoryCTP8 hr
Nov 15, 12:22 PM ESTTornado WatchSPC7 hr
Dec 7, 9:56 AM ESTWind AdvisoryCTP10 hr
Dec 11, 3:18 AM ESTFlood WatchCTP24 hr
Dec 11, 7:55 PM ESTAreal Flood AdvisoryCTP6 hr
Dec 15, 2:44 PM ESTWinter Storm WatchCTP14 hr
Dec 16, 4:44 AM ESTWinter Weather AdvisoryCTP31 hr
Dec 16, 11:55 PM ESTMesoscale DiscussionSPC4 hr
Dec 18, 4:04 PM ESTWinter Weather AdvisoryCTP26 hr
Dec 20, 3:05 PM ESTWinter Weather AdvisoryCTP24 hr
Dec 20, 11:55 PM ESTMesoscale DiscussionSPC4 hr
Dec 21, 10:25 PM ESTWind AdvisoryCTP7 hr
Dec 23, 5:58 AM ESTWinter Weather AdvisoryCTP29 hr
Dec 24, 3:15 PM ESTAreal Flood AdvisoryCTP3 hr
Dec 25, 2:15 AM ESTAreal Flood AdvisoryCTP6 hr
Dec 27, 3:58 PM ESTDense Fog AdvisoryCTP16 hr
Dec 30, 2:26 PM ESTWind AdvisoryCTP35 hr
Dec 31, 3:22 AM ESTHigh Wind WarningCTP11 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.