Alert archive / Pennsylvania / Snyder County

Weather alerts in Snyder County, Pennsylvania, 2018

119 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Snyder County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
119
Warnings
22
Watches
20
Advisories
32
Busiest month
July18 alerts
Busiest day
July 24, 20188 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 Snyder County in 2018 had a tornado report inside them.

Snyder County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings550%2100%7 min
Flash flood warnings20100%0

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS State College, PA: tornado warnings22577%1050%7 min
NWS State College, PA: severe thunderstorm warnings1228134%24480%30 min
NWS State College, PA: flash flood warnings573637%8988%96 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 4, 3:46 AM ESTWind Chill AdvisoryCTP3 days
Jan 11, 4:34 AM ESTFlood WatchCTP51 hr
Jan 12, 4:46 AM ESTWinter Weather AdvisoryCTP29 hr
Jan 12, 7:04 PM ESTMesoscale DiscussionSPC6 hr
Jan 12, 7:24 PM ESTAreal Flood AdvisoryCTP3 hr
Jan 13, 12:56 AM ESTMesoscale DiscussionSPC6 hr
Jan 15, 2:22 PM ESTWinter Weather AdvisoryCTP41 hr
Feb 3, 2:44 PM ESTWinter Weather AdvisoryCTP42 hr
Feb 6, 3:57 AM ESTWinter Weather AdvisoryCTP38 hr
Feb 7, 5:28 AM ESTMesoscale DiscussionSPC5 hr
Feb 7, 11:25 AM ESTMesoscale DiscussionSPC6 hr
Feb 11, 12:01 AM ESTDense Fog AdvisoryCTP10 hr
Feb 11, 6:40 PM ESTDense Fog AdvisoryCTP5 hr
Feb 16, 7:14 PM ESTWinter Weather AdvisoryCTP33 hr
Feb 20, 12:33 AM ESTDense Fog AdvisoryCTP9 hr
Feb 22, 11:29 AM ESTFlood WatchCTP68 hr
Feb 24, 4:12 AM ESTDense Fog AdvisoryCTP6 hr
Mar 1, 4:03 PM ESTWind AdvisoryCTP33 hr
Mar 6, 4:21 PM ESTWinter Weather AdvisoryCTP22 hr
Mar 13, 4:55 PM EDTSpecial Weather StatementCTP35 min
Mar 20, 4:36 AM EDTWinter Weather AdvisoryCTP39 hr
Mar 29, 2:28 AM EDTDense Fog AdvisoryCTP8 hr
Apr 1, 4:17 AM EDTWinter Weather AdvisoryCTP29 hr
Apr 2, 3:47 AM EDTMesoscale DiscussionSPC6 hr
Apr 3, 3:25 PM EDTWind AdvisoryCTP12 hr
Apr 4, 3:36 AM EDTHigh Wind WarningCTP16 hr
Apr 17, 6:02 PM EDTSpecial Weather StatementCTP58 min
Apr 20, 4:27 AM EDTFreeze WatchCTP10 hr
Apr 20, 2:38 PM EDTFreeze WarningCTP17 hr
May 2, 4:45 AM EDTRed Flag WarningCTP16 hr
May 3, 4:24 PM EDTSpecial Weather StatementCTP36 min
May 3, 4:27 PM EDTSevere Thunderstorm WarningCTP33 min
May 4, 6:20 PM EDTSevere Thunderstorm WatchSPC4 hr
May 4, 8:04 PM EDTSpecial Weather StatementCTP71 min
May 4, 8:23 PM EDTMesoscale DiscussionSPC67 min
May 4, 8:50 PM EDTMesoscale DiscussionSPC85 min
May 7, 1:15 AM EDTDense Fog AdvisoryCTP8 hr
May 10, 4:37 PM EDTSevere Thunderstorm WarningCTP53 min
May 12, 4:58 PM EDTSpecial Weather StatementCTP32 min
May 15, 11:43 AM EDTMesoscale DiscussionSPC3 hr
May 15, 12:26 PM EDTSevere Thunderstorm WatchSPC7 hr
May 15, 2:14 PM EDTMesoscale DiscussionSPC2 hr
May 15, 2:16 PM EDTSevere Thunderstorm WarningCTP74 min
May 15, 2:45 PM EDTTornado WarningCTP24 min
May 15, 3:14 PM EDTSevere Thunderstorm WarningCTP46 min
Jun 5, 3:05 PM EDTMesoscale DiscussionSPC2 hr
Jun 10, 11:51 PM EDTAreal Flood AdvisoryCTP3 hr
Jun 13, 6:10 PM EDTMesoscale DiscussionSPC95 min
Jun 13, 6:33 PM EDTSevere Thunderstorm WatchSPC4 hr
Jun 13, 8:43 PM EDTMesoscale DiscussionSPC62 min
Jun 17, 2:14 PM EDTHeat AdvisoryCTP30 hr
Jun 27, 7:37 PM EDTMesoscale DiscussionSPC3 hr
Jun 27, 11:01 PM EDTSpecial Weather StatementCTP29 min
Jun 29, 2:28 PM EDTHeat AdvisoryCTP4 days
Jul 2, 1:03 PM EDTMesoscale DiscussionSPC72 min
Jul 4, 9:54 AM EDTFlash Flood WatchCTP10 hr
Jul 5, 4:17 AM EDTFlash Flood WatchCTP30 hr
Jul 21, 4:40 AM EDTFlash Flood WatchCTP23 hr
Jul 23, 3:59 AM EDTFlash Flood WatchCTP4 days
Jul 23, 12:41 PM EDTSpecial Weather StatementCTP49 min
Jul 23, 12:54 PM EDTSpecial Weather StatementCTP36 min
Jul 23, 2:40 PM EDTMesoscale DiscussionSPC3 hr
Jul 23, 10:39 PM EDTAreal Flood AdvisoryCTP3 hr
Jul 23, 11:30 PM EDTFlash Flood WarningCTP4 hr
Jul 23, 11:34 PM EDTFlash Flood WarningCTP4 hr
Jul 24, 2:56 AM EDTAreal Flood WarningCTP6 hr
Jul 24, 8:35 AM EDTRiver Flood WarningCTP58 hr
Jul 24, 9:06 AM EDTAreal Flood WarningCTP9 hr
Jul 24, 5:58 PM EDTAreal Flood WarningCTP48 hr
Jul 24, 6:50 PM EDTSpecial Weather StatementCTP40 min
Jul 25, 10:20 AM EDTRiver Flood WarningCTP58 hr
Jul 25, 10:20 AM EDTRiver Flood WarningCTP72 hr
Aug 1, 4:06 AM EDTFlash Flood WatchCTP3 days
Aug 1, 3:15 PM EDTMesoscale DiscussionSPC3 hr
Aug 3, 1:52 AM EDTAreal Flood AdvisoryCTP3 hr
Aug 3, 12:24 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 7, 3:36 PM EDTAreal Flood AdvisoryCTP114 min
Aug 11, 10:54 AM EDTFlash Flood WatchCTP8 hr
Aug 11, 12:14 PM EDTAreal Flood AdvisoryCTP3 hr
Aug 13, 1:46 AM EDTFlash Flood WatchCTP43 hr
Aug 17, 6:22 AM EDTSpecial Weather StatementCTP53 min
Aug 17, 2:42 PM EDTMesoscale DiscussionSPC3 hr
Aug 17, 3:44 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 21, 4:56 PM EDTMesoscale DiscussionSPC2 hr
Aug 27, 4:25 AM EDTHeat AdvisoryCTP64 hr
Sep 6, 1:20 PM EDTMesoscale DiscussionSPC2 hr
Sep 6, 2:55 PM EDTSpecial Weather StatementCTP35 min
Sep 6, 3:31 PM EDTSpecial Weather StatementCTP44 min
Sep 8, 3:33 AM EDTFlood WatchCTP64 hr
Sep 16, 7:11 AM EDTDense Fog AdvisoryCTP3 hr
Sep 17, 4:51 AM EDTFlash Flood WatchCTP31 hr
Sep 18, 5:41 AM EDTAreal Flood AdvisoryCTP3 hr
Sep 26, 2:48 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 1:12 PM EDTFlash Flood WatchCTP9 hr
Oct 2, 2:26 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 2:55 PM EDTTornado WatchSPC8 hr
Oct 2, 4:43 PM EDTMesoscale DiscussionSPC2 hr
Oct 2, 7:24 PM EDTMesoscale DiscussionSPC81 min
Oct 2, 7:57 PM EDTSpecial Weather StatementCTP33 min
Oct 2, 8:19 PM EDTSevere Thunderstorm WarningCTP56 min
Oct 13, 1:13 PM EDTFrost AdvisoryCTP19 hr
Oct 17, 2:28 PM EDTFreeze WatchCTP13 hr
Oct 18, 3:14 AM EDTFreeze WarningCTP30 hr
Nov 2, 4:47 AM EDTSpecial Weather StatementCTP28 min
Nov 2, 5:17 AM EDTSpecial Weather StatementCTP28 min
Nov 2, 5:49 AM EDTSpecial Weather StatementCTP26 min
Nov 2, 6:19 AM EDTSpecial Weather StatementCTP26 min
Nov 10, 7:24 AM ESTSnow Squall WarningCTP66 min
Nov 10, 8:05 AM ESTSnow Squall WarningCTP55 min
Nov 14, 3:40 PM ESTWinter Storm WarningCTP38 hr
Nov 15, 9:56 AM ESTMesoscale DiscussionSPC6 hr
Nov 15, 4:39 PM ESTMesoscale DiscussionSPC6 hr
Nov 16, 3:56 AM ESTMesoscale DiscussionSPC6 hr
Nov 23, 11:02 AM ESTWinter Weather AdvisoryCTP27 hr
Nov 24, 10:08 AM ESTMesoscale DiscussionSPC5 hr
Dec 2, 7:37 PM ESTDense Fog AdvisoryCTP8 hr
Dec 19, 3:49 AM ESTFlood WatchCTP69 hr
Dec 21, 4:16 PM ESTMesoscale DiscussionSPC59 min
Dec 22, 4:26 AM ESTRiver Flood WarningCTP13 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 archive20172019

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.