Alert archive / North Carolina / Forsyth County

Weather alerts in Forsyth County, North Carolina, 2019

134 weather alerts in 2019, 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 2019. Tap one for its archive.

Alerts
134
Warnings
32
Watches
14
Advisories
28
Busiest month
August33 alerts
Busiest day
May 31, 20198 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 Forsyth County in 2019 had a tornado report inside them.

Forsyth County, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings181517%2387%20 min
Flash flood warnings7357%0

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Raleigh, NC: tornado warnings511276%2471%11 min
NWS Raleigh, NC: severe thunderstorm warnings25219224%67681%21 min
NWS Raleigh, NC: flash flood warnings292128%7989%75 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 11, 3:53 PM ESTWinter Storm WatchRAH12 hr
Jan 12, 3:48 AM ESTWinter Storm WarningRAH33 hr
Jan 12, 10:15 PM ESTMesoscale DiscussionSPC5 hr
Jan 20, 4:02 AM ESTWind AdvisoryRAH14 hr
Jan 22, 3:55 AM ESTWinter Weather AdvisoryRAH32 hr
Jan 30, 3:41 AM ESTWind AdvisoryRAH14 hr
Feb 19, 3:46 AM ESTWinter Weather AdvisoryRAH32 hr
Feb 23, 12:31 PM ESTAreal Flood AdvisoryRAH4 hr
Feb 23, 7:40 PM ESTWind AdvisoryRAH26 hr
Feb 23, 10:36 PM ESTAreal Flood WarningRAH8 hr
Feb 28, 2:57 AM ESTDense Fog AdvisoryRAH7 hr
Mar 31, 4:16 AM EDTFreeze WarningRAH29 hr
Apr 2, 11:22 AM EDTWinter Weather AdvisoryRAH4 hr
Apr 2, 3:36 PM EDTFrost AdvisoryRAH17 hr
Apr 7, 3:35 AM EDTDense Fog AdvisoryRAH7 hr
Apr 8, 1:49 PM EDTMesoscale DiscussionSPC86 min
Apr 8, 2:32 PM EDTSevere Thunderstorm WatchSPC7 hr
Apr 8, 3:10 PM EDTSpecial Weather StatementRAH65 min
Apr 8, 4:22 PM EDTMesoscale DiscussionSPC83 min
Apr 12, 1:57 PM EDTSpecial Weather StatementRAH63 min
Apr 13, 10:04 AM EDTFlash Flood WarningRAH7 hr
Apr 13, 10:53 AM EDTFlash Flood WatchRAH7 hr
Apr 14, 11:48 AM EDTMesoscale DiscussionSPC117 min
Apr 14, 2:16 PM EDTTornado WatchSPC8 hr
Apr 14, 4:50 PM EDTMesoscale DiscussionSPC85 min
Apr 14, 6:08 PM EDTSpecial Weather StatementRAH67 min
Apr 14, 7:12 PM EDTMesoscale DiscussionSPC2 hr
Apr 14, 10:09 PM EDTMesoscale DiscussionSPC96 min
Apr 14, 10:14 PM EDTTornado WatchSPC6 hr
Apr 14, 11:36 PM EDTSpecial Weather StatementRAH54 min
Apr 15, 12:42 AM EDTTornado WarningRAH33 min
Apr 15, 1:06 AM EDTSevere Thunderstorm WarningRAH39 min
Apr 19, 10:06 AM EDTMesoscale DiscussionSPC84 min
Apr 19, 10:31 AM EDTTornado WatchSPC9 hr
Apr 19, 1:40 PM EDTMesoscale DiscussionSPC2 hr
Apr 19, 2:26 PM EDTSevere Thunderstorm WarningRAH49 min
Apr 26, 5:31 PM EDTWind AdvisoryRAH4 hr
May 4, 5:51 PM EDTMesoscale DiscussionSPC84 min
May 12, 9:32 PM EDTSevere Thunderstorm WarningRAH43 min
May 29, 7:23 PM EDTSpecial Weather StatementRAH52 min
May 31, 12:07 PM EDTMesoscale DiscussionSPC113 min
May 31, 1:29 PM EDTSevere Thunderstorm WatchSPC10 hr
May 31, 3:20 PM EDTSpecial Weather StatementRAH55 min
May 31, 4:24 PM EDTSpecial Weather StatementRAH66 min
May 31, 4:26 PM EDTSevere Thunderstorm WarningRAH49 min
May 31, 4:43 PM EDTMesoscale DiscussionSPC62 min
May 31, 5:36 PM EDTSpecial Weather StatementRAH54 min
May 31, 7:22 PM EDTMesoscale DiscussionSPC83 min
May 31, 9:55 PM EDTMesoscale DiscussionSPC95 min
Jun 1, 10:20 PM EDTSpecial Weather StatementRAH55 min
Jun 5, 12:52 PM EDTMesoscale DiscussionSPC113 min
Jun 5, 2:33 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 5, 2:37 PM EDTSpecial Weather StatementRAH53 min
Jun 7, 9:31 PM EDTFlash Flood WatchRAH45 hr
Jun 7, 10:41 PM EDTFlash Flood WarningRAH4 hr
Jun 8, 2:46 AM EDTFlash Flood WarningRAH89 min
Jun 8, 5:17 AM EDTAreal Flood AdvisoryRAH3 hr
Jun 8, 1:44 PM EDTAreal Flood AdvisoryRAH3 hr
Jun 12, 9:25 PM EDTAreal Flood AdvisoryRAH2 hr
Jun 12, 10:03 PM EDTFlash Flood WarningRAH3 hr
Jun 17, 10:11 PM EDTSpecial Weather StatementRAH64 min
Jun 17, 10:30 PM EDTAreal Flood AdvisoryRAH7 hr
Jun 18, 4:08 AM EDTFlash Flood WatchRAH24 hr
Jun 18, 3:19 PM EDTMesoscale DiscussionSPC116 min
Jun 18, 5:34 PM EDTSpecial Weather StatementRAH56 min
Jun 18, 7:28 PM EDTSpecial Weather StatementRAH62 min
Jun 18, 7:35 PM EDTAreal Flood AdvisoryRAH3 hr
Jun 18, 7:53 PM EDTFlash Flood WarningRAH2 hr
Jun 20, 12:23 PM EDTMesoscale DiscussionSPC2 hr
Jun 20, 1:23 PM EDTSpecial Weather StatementRAH52 min
Jun 20, 1:43 PM EDTSevere Thunderstorm WarningRAH62 min
Jun 20, 1:49 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 22, 2:56 AM EDTSpecial Weather StatementRAH64 min
Jun 22, 10:36 PM EDTSpecial Weather StatementRAH39 min
Jun 22, 10:57 PM EDTAreal Flood AdvisoryRAH2 hr
Jun 24, 5:44 PM EDTMesoscale DiscussionSPC3 hr
Jun 24, 9:33 PM EDTSpecial Weather StatementRAH57 min
Jun 24, 9:56 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 5:55 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 6:08 PM EDTSevere Thunderstorm WarningRAH67 min
Jul 11, 3:38 PM EDTSpecial Weather StatementRAH67 min
Jul 15, 6:53 PM EDTAreal Flood AdvisoryRAH90 min
Jul 15, 7:00 PM EDTFlash Flood WarningRAH82 min
Jul 18, 5:24 PM EDTSpecial Weather StatementRAH51 min
Jul 18, 5:58 PM EDTSevere Thunderstorm WarningRAH47 min
Jul 19, 2:45 PM EDTHeat AdvisoryRAH57 hr
Jul 20, 12:37 PM EDTSpecial Weather StatementRAH53 min
Jul 20, 1:12 PM EDTAreal Flood AdvisoryRAH3 hr
Jul 20, 6:51 PM EDTHeat AdvisoryRAH29 hr
Jul 22, 6:45 PM EDTSevere Thunderstorm WarningRAH60 min
Aug 1, 4:25 PM EDTAreal Flood AdvisoryRAH68 min
Aug 1, 8:42 PM EDTSpecial Weather StatementRAH48 min
Aug 1, 8:44 PM EDTSevere Thunderstorm WarningRAH46 min
Aug 10, 1:59 PM EDTMesoscale DiscussionSPC2 hr
Aug 10, 3:19 PM EDTSpecial Weather StatementRAH41 min
Aug 13, 12:00 PM EDTMesoscale DiscussionSPC105 min
Aug 13, 1:23 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 13, 3:22 PM EDTSpecial Weather StatementRAH53 min
Aug 13, 3:49 PM EDTSevere Thunderstorm WarningRAH56 min
Aug 13, 4:30 PM EDTMesoscale DiscussionSPC60 min
Aug 13, 4:35 PM EDTSevere Thunderstorm WarningRAH55 min
Aug 16, 7:25 PM EDTSpecial Weather StatementRAH65 min
Aug 16, 7:51 PM EDTAreal Flood AdvisoryRAH51 min
Aug 17, 2:20 PM EDTFlash Flood WarningRAH46 min
Aug 17, 3:22 PM EDTSpecial Weather StatementRAH53 min
Aug 17, 3:35 PM EDTSevere Thunderstorm WarningRAH55 min
Aug 17, 3:56 PM EDTAreal Flood AdvisoryRAH75 min
Aug 17, 3:57 PM EDTSpecial Weather StatementRAH48 min
Aug 17, 4:05 PM EDTSevere Thunderstorm WarningRAH40 min
Aug 18, 7:04 PM EDTSpecial Weather StatementRAH41 min
Aug 19, 4:47 PM EDTSpecial Weather StatementRAH58 min
Aug 19, 5:27 PM EDTAreal Flood AdvisoryRAH3 hr
Aug 19, 5:28 PM EDTSpecial Weather StatementRAH47 min
Aug 19, 5:42 PM EDTSevere Thunderstorm WarningRAH63 min
Aug 19, 6:47 PM EDTSpecial Weather StatementRAH43 min
Aug 19, 7:28 PM EDTSpecial Weather StatementRAH47 min
Aug 21, 4:55 PM EDTSevere Thunderstorm WarningRAH80 min
Aug 22, 2:02 PM EDTMesoscale DiscussionSPC118 min
Aug 22, 3:21 PM EDTSpecial Weather StatementRAH69 min
Aug 22, 3:31 PM EDTSevere Thunderstorm WarningRAH59 min
Aug 23, 3:39 AM EDTSpecial Weather StatementRAH66 min
Aug 23, 3:24 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 23, 5:21 PM EDTSevere Thunderstorm WarningRAH9 min
Sep 28, 2:22 AM EDTSpecial Weather StatementRAH53 min
Oct 31, 1:11 PM EDTMesoscale DiscussionSPC3 hr
Oct 31, 3:39 PM EDTTornado WatchSPC7 hr
Oct 31, 5:33 PM EDTSevere Thunderstorm WarningRAH57 min
Nov 1, 3:16 AM EDTFreeze WarningRAH30 hr
Nov 2, 3:16 PM EDTFreeze WarningRAH18 hr
Nov 3, 2:20 PM ESTFreeze WarningRAH18 hr
Nov 19, 4:14 AM ESTDense Fog AdvisoryRAH6 hr
Dec 12, 4:05 AM ESTWinter Weather AdvisoryRAH30 hr
Dec 13, 3:50 PM ESTAreal Flood AdvisoryRAH3 hr
Dec 17, 5:53 AM ESTSpecial Weather StatementRAH52 min

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 archive20182020

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.