Alert archive / North Carolina / Forsyth County

Weather alerts in Forsyth County, North Carolina, 2015

124 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Forsyth County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts
124
Warnings
18
Watches
14
Advisories
41
Busiest month
June25 alerts
Busiest day
June 27, 20156 alerts

Over time

By month

Warning verification

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

Forsyth County, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings9722%1771%22 min
Flash flood warnings4325%0

Each office's whole area, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Raleigh, NC: tornado warnings5180%1100%3 min
NWS Raleigh, NC: severe thunderstorm warnings22516228%37590%21 min
NWS Raleigh, NC: flash flood warnings352431%4988%73 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 3, 9:32 PM ESTDense Fog AdvisoryRAH9 hr
Jan 7, 4:17 AM ESTWind Chill AdvisoryRAH30 hr
Jan 13, 4:36 AM ESTWinter Weather AdvisoryRAH31 hr
Jan 15, 5:29 AM ESTDense Fog AdvisoryRAH5 hr
Feb 2, 4:01 AM ESTWind AdvisoryRAH15 hr
Feb 14, 4:21 AM ESTRed Flag WarningRAH14 hr
Feb 14, 4:59 AM ESTWind AdvisoryRAH25 hr
Feb 14, 3:28 PM ESTWind Chill AdvisoryRAH18 hr
Feb 15, 4:42 AM ESTWinter Storm WatchRAH12 hr
Feb 15, 4:18 PM ESTWinter Storm WarningRAH41 hr
Feb 16, 4:50 PM ESTMesoscale DiscussionSPC6 hr
Feb 16, 8:36 PM ESTSpecial Weather StatementRAH99 min
Feb 17, 2:58 PM ESTWinter Weather AdvisoryRAH19 hr
Feb 18, 3:57 AM ESTWind Chill AdvisoryRAH53 hr
Feb 18, 4:06 PM ESTWinter Weather AdvisoryRAH17 hr
Feb 21, 9:23 AM ESTSpecial Weather StatementRAH3 hr
Feb 24, 4:22 AM ESTWinter Weather AdvisoryRAH31 hr
Feb 24, 4:38 PM ESTWinter Storm WatchRAH12 hr
Feb 24, 4:38 PM ESTWinter Weather AdvisoryRAH19 hr
Feb 25, 4:28 AM ESTWinter Storm WarningRAH32 hr
Feb 25, 7:55 PM ESTMesoscale DiscussionSPC6 hr
Feb 26, 1:56 PM ESTWinter Weather AdvisoryRAH20 hr
Feb 27, 2:59 PM ESTWinter Weather AdvisoryRAH19 hr
Feb 28, 3:49 PM ESTWinter Weather AdvisoryRAH24 hr
Mar 2, 2:57 AM ESTDense Fog AdvisoryRAH6 hr
Mar 4, 4:27 AM ESTDense Fog AdvisoryRAH7 hr
Mar 5, 3:44 AM ESTWinter Weather AdvisoryRAH29 hr
Apr 3, 2:59 PM EDTFire Weather WatchRAH16 hr
Apr 4, 2:33 PM EDTFreeze WarningRAH17 hr
Apr 9, 5:06 PM EDTMesoscale DiscussionSPC54 min
Apr 9, 6:47 PM EDTSevere Thunderstorm WarningRAH58 min
Apr 10, 3:48 AM EDTDense Fog AdvisoryRAH5 hr
Apr 14, 4:28 PM EDTSpecial Weather StatementRAH32 min
Apr 14, 4:29 PM EDTMesoscale DiscussionSPC46 min
Apr 18, 8:07 AM EDTDense Fog AdvisoryRAH76 min
Apr 19, 6:32 PM EDTAreal Flood AdvisoryRAH4 hr
Apr 19, 7:23 PM EDTFlash Flood WarningRAH3 hr
Apr 20, 10:54 AM EDTSpecial Weather StatementRAH66 min
Apr 20, 2:30 PM EDTSpecial Weather StatementRAH45 min
Apr 20, 2:35 PM EDTSevere Thunderstorm WarningRAH40 min
Apr 20, 2:55 PM EDTSevere Thunderstorm WatchSPC7 hr
Apr 20, 6:27 PM EDTMesoscale DiscussionSPC93 min
May 1, 4:57 PM EDTSpecial Weather StatementRAH93 min
May 11, 3:24 PM EDTMesoscale DiscussionSPC3 hr
May 11, 7:58 PM EDTSpecial Weather StatementRAH62 min
May 11, 8:31 PM EDTSevere Thunderstorm WarningRAH59 min
May 21, 12:21 AM EDTSpecial Weather StatementRAH54 min
May 29, 3:56 PM EDTAreal Flood AdvisoryRAH2 hr
May 31, 7:10 PM EDTAreal Flood AdvisoryRAH110 min
Jun 2, 12:46 PM EDTMesoscale DiscussionSPC2 hr
Jun 2, 7:24 PM EDTSevere Thunderstorm WarningRAH66 min
Jun 2, 8:30 PM EDTSevere Thunderstorm WarningRAH60 min
Jun 2, 8:52 PM EDTAreal Flood AdvisoryRAH3 hr
Jun 8, 6:24 PM EDTMesoscale DiscussionSPC96 min
Jun 8, 7:03 PM EDTSpecial Weather StatementRAH27 min
Jun 9, 12:38 AM EDTSpecial Weather StatementRAH52 min
Jun 12, 5:55 PM EDTSpecial Weather StatementRAH80 min
Jun 18, 1:32 PM EDTMesoscale DiscussionSPC2 hr
Jun 19, 5:16 PM EDTSevere Thunderstorm WarningRAH46 min
Jun 20, 1:36 PM EDTMesoscale DiscussionSPC114 min
Jun 20, 3:26 PM EDTSevere Thunderstorm WatchSPC10 hr
Jun 21, 7:35 PM EDTSpecial Weather StatementRAH55 min
Jun 23, 3:02 PM EDTSpecial Weather StatementRAH43 min
Jun 26, 3:13 PM EDTSpecial Weather StatementRAH62 min
Jun 26, 3:29 PM EDTMesoscale DiscussionSPC2 hr
Jun 26, 4:03 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 26, 11:43 PM EDTSpecial Weather StatementRAH47 min
Jun 27, 2:07 AM EDTFlash Flood WatchRAH20 hr
Jun 27, 2:06 PM EDTMesoscale DiscussionSPC2 hr
Jun 27, 5:00 PM EDTSevere Thunderstorm WarningRAH45 min
Jun 27, 5:23 PM EDTAreal Flood AdvisoryRAH3 hr
Jun 27, 6:23 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 12:55 PM EDTMesoscale DiscussionSPC3 hr
Jun 30, 3:34 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 3, 7:11 PM EDTSpecial Weather StatementRAH64 min
Jul 5, 4:57 PM EDTSpecial Weather StatementRAH63 min
Jul 13, 6:23 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 13, 7:18 PM EDTSpecial Weather StatementRAH57 min
Jul 13, 7:46 PM EDTSevere Thunderstorm WarningRAH59 min
Jul 13, 8:06 PM EDTMesoscale DiscussionSPC84 min
Jul 13, 8:46 PM EDTSevere Thunderstorm WarningRAH74 min
Jul 18, 2:05 PM EDTMesoscale DiscussionSPC115 min
Jul 18, 9:32 PM EDTSpecial Weather StatementRAH43 min
Jul 18, 9:42 PM EDTAreal Flood AdvisoryRAH2 hr
Jul 21, 4:42 PM EDTSpecial Weather StatementRAH63 min
Jul 29, 5:01 PM EDTSpecial Weather StatementRAH59 min
Jul 30, 2:16 PM EDTSpecial Weather StatementRAH59 min
Aug 4, 3:35 PM EDTSpecial Weather StatementRAH55 min
Aug 6, 7:59 PM EDTAreal Flood AdvisoryRAH3 hr
Aug 6, 8:54 PM EDTFlash Flood WarningRAH3 hr
Aug 10, 7:21 PM EDTSpecial Weather StatementRAH54 min
Aug 10, 8:18 PM EDTAreal Flood AdvisoryRAH117 min
Aug 11, 1:30 PM EDTMesoscale DiscussionSPC3 hr
Aug 11, 4:32 PM EDTSpecial Weather StatementRAH58 min
Aug 15, 5:51 PM EDTSpecial Weather StatementRAH39 min
Aug 18, 9:10 PM EDTSpecial Weather StatementRAH65 min
Aug 18, 9:46 PM EDTAreal Flood AdvisoryRAH3 hr
Aug 19, 6:20 PM EDTSpecial Weather StatementRAH55 min
Aug 24, 5:55 PM EDTSpecial Weather StatementRAH50 min
Sep 4, 4:33 PM EDTSpecial Weather StatementRAH57 min
Sep 4, 5:21 PM EDTSpecial Weather StatementRAH54 min
Sep 10, 2:01 PM EDTSpecial Weather StatementRAH74 min
Sep 10, 5:07 PM EDTSpecial Weather StatementRAH83 min
Sep 30, 3:03 PM EDTFlash Flood WatchRAH5 days
Oct 2, 7:10 AM EDTWind AdvisoryRAH3 days
Oct 2, 11:42 PM EDTAreal Flood AdvisoryRAH3 hr
Oct 3, 12:36 AM EDTFlash Flood WarningRAH5 hr
Oct 3, 3:56 AM EDTAreal Flood AdvisoryRAH3 hr
Oct 3, 6:53 AM EDTAreal Flood AdvisoryRAH112 min
Oct 17, 2:42 PM EDTFrost AdvisoryRAH18 hr
Oct 17, 2:42 PM EDTFreeze WatchRAH24 hr
Oct 18, 3:06 PM EDTFreeze WarningRAH18 hr
Nov 2, 8:08 AM ESTAreal Flood AdvisoryRAH3 hr
Nov 2, 10:41 AM ESTFlash Flood WatchRAH17 hr
Dec 1, 6:14 PM ESTDense Fog AdvisoryRAH16 hr
Dec 8, 10:53 PM ESTDense Fog AdvisoryRAH12 hr
Dec 12, 5:06 AM ESTDense Fog AdvisoryRAH5 hr
Dec 13, 5:03 AM ESTDense Fog AdvisoryRAH6 hr
Dec 22, 3:53 PM ESTFlash Flood WatchRAH51 hr
Dec 24, 10:39 AM ESTSpecial Weather StatementRAH51 min
Dec 29, 3:07 PM ESTFlood WatchRAH35 hr
Dec 29, 10:11 PM ESTDense Fog AdvisoryRAH8 hr
Dec 30, 11:58 AM ESTAreal Flood AdvisoryRAH3 hr
Dec 30, 1:34 PM ESTFlash Flood WarningRAH5 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 archive20142016

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.