Alert archive / New Hampshire / Sullivan County

Weather alerts in Sullivan County, New Hampshire, 2017

128 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sullivan County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
128
Warnings
28
Watches
18
Advisories
33
Busiest month
February16 alerts
Busiest day
July 1, 20178 alerts

Over time

By month

Warning verification

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

Sullivan County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings151220%2100%24 min
Flash flood warnings440%250%66 min

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Gray, ME: tornado warnings7357%1080%16 min
NWS Gray, ME: severe thunderstorm warnings886625%17384%27 min
NWS Gray, ME: flash flood warnings251444%5190%92 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 2, 3:38 PM ESTWinter Weather AdvisoryGYX39 hr
Jan 16, 3:12 PM ESTWinter Storm WatchGYX12 hr
Jan 17, 3:29 AM ESTWinter Weather AdvisoryGYX38 hr
Jan 22, 3:18 PM ESTWinter Storm WatchGYX25 hr
Jan 23, 3:18 AM ESTWinter Weather AdvisoryGYX48 hr
Jan 23, 11:48 PM ESTMesoscale DiscussionSPC6 hr
Jan 24, 5:44 AM ESTMesoscale DiscussionSPC6 hr
Feb 6, 3:09 PM ESTWinter Weather AdvisoryGYX42 hr
Feb 7, 5:44 PM ESTMesoscale DiscussionSPC5 hr
Feb 7, 11:18 PM ESTMesoscale DiscussionSPC5 hr
Feb 8, 3:15 PM ESTWinter Storm WarningGYX31 hr
Feb 8, 3:15 PM ESTWinter Weather AdvisoryGYX18 hr
Feb 9, 4:55 AM ESTMesoscale DiscussionSPC6 hr
Feb 10, 3:45 PM ESTWinter Storm WatchGYX25 hr
Feb 11, 4:20 PM ESTWinter Storm WarningGYX51 hr
Feb 12, 9:59 AM ESTMesoscale DiscussionSPC5 hr
Feb 12, 2:51 PM ESTMesoscale DiscussionSPC4 hr
Feb 14, 3:50 PM ESTWinter Weather AdvisoryGYX42 hr
Feb 15, 1:26 PM ESTSpecial Weather StatementGYX64 min
Feb 15, 2:26 PM ESTSpecial Weather StatementGYX64 min
Feb 23, 2:58 PM ESTFlood WatchGYX4 days
Feb 25, 6:24 PM ESTMesoscale DiscussionSPC66 min
Feb 25, 7:59 PM ESTSpecial Weather StatementGYX61 min
Mar 1, 3:28 AM ESTWind AdvisoryGYX39 hr
Mar 1, 11:12 PM ESTDense Fog AdvisoryGYX7 hr
Mar 8, 12:46 AM ESTDense Fog AdvisoryGYX8 hr
Mar 8, 2:56 PM ESTSpecial Weather StatementGYX79 min
Mar 8, 4:28 PM ESTSpecial Weather StatementGYX47 min
Mar 9, 8:14 AM ESTWind AdvisoryGYX8 hr
Mar 10, 3:02 AM ESTWind Chill AdvisoryGYX53 hr
Mar 11, 4:01 PM ESTWinter Storm WatchGYX35 hr
Mar 13, 3:58 AM EDTWinter Storm WarningGYX55 hr
Mar 14, 9:04 AM EDTMesoscale DiscussionSPC4 hr
Mar 14, 1:57 PM EDTMesoscale DiscussionSPC5 hr
Mar 26, 4:08 AM EDTFreezing Rain AdvisoryGYX17 hr
Mar 26, 9:14 PM EDTFreezing Rain AdvisoryGYX18 hr
Mar 29, 3:56 PM EDTWinter Storm WatchGYX35 hr
Mar 30, 3:57 PM EDTWinter Storm WarningGYX51 hr
Mar 31, 8:17 PM EDTMesoscale DiscussionSPC6 hr
Apr 4, 3:40 PM EDTFlood WatchGYX60 hr
Apr 11, 5:56 PM EDTSpecial Weather StatementGYX34 min
Apr 16, 6:05 PM EDTSpecial Weather StatementGYX40 min
May 1, 10:45 PM EDTSpecial Weather StatementGYX45 min
May 18, 7:33 PM EDTMesoscale DiscussionSPC87 min
May 18, 8:42 PM EDTSevere Thunderstorm WarningGYX63 min
May 31, 12:29 PM EDTMesoscale DiscussionSPC61 min
May 31, 1:22 PM EDTSevere Thunderstorm WatchSPC8 hr
May 31, 4:46 PM EDTMesoscale DiscussionSPC119 min
May 31, 5:17 PM EDTSevere Thunderstorm WarningGYX58 min
May 31, 6:13 PM EDTSpecial Weather StatementGYX62 min
May 31, 7:06 PM EDTAreal Flood AdvisoryGYX114 min
Jun 1, 3:30 AM EDTDense Fog AdvisoryGYX5 hr
Jun 18, 3:19 AM EDTFlash Flood WatchGYX41 hr
Jun 19, 10:45 AM EDTMesoscale DiscussionSPC3 hr
Jun 19, 12:24 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 19, 2:39 PM EDTFlash Flood WarningGYX6 hr
Jun 19, 2:58 PM EDTMesoscale DiscussionSPC2 hr
Jun 19, 3:30 PM EDTFlash Flood WarningGYX3 hr
Jun 19, 3:44 PM EDTSevere Thunderstorm WarningGYX46 min
Jun 19, 4:57 PM EDTSevere Thunderstorm WarningGYX48 min
Jun 23, 2:02 PM EDTMesoscale DiscussionSPC2 hr
Jun 27, 12:00 PM EDTMesoscale DiscussionSPC2 hr
Jun 27, 4:09 PM EDTSevere Thunderstorm WarningGYX20 min
Jun 30, 12:48 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 1:41 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 30, 4:20 PM EDTMesoscale DiscussionSPC115 min
Jun 30, 7:06 PM EDTMesoscale DiscussionSPC54 min
Jul 1, 11:01 AM EDTSpecial Weather StatementGYX29 min
Jul 1, 12:32 PM EDTMesoscale DiscussionSPC118 min
Jul 1, 1:19 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 1, 4:10 PM EDTMesoscale DiscussionSPC2 hr
Jul 1, 5:04 PM EDTSevere Thunderstorm WarningGYX56 min
Jul 1, 5:39 PM EDTFlash Flood WarningGYX2 hr
Jul 1, 7:16 PM EDTSevere Thunderstorm WarningGYX59 min
Jul 1, 7:58 PM EDTFlash Flood WarningGYX2 hr
Jul 8, 12:16 PM EDTSevere Thunderstorm WarningGYX44 min
Jul 12, 8:52 PM EDTSpecial Weather StatementGYX23 min
Jul 12, 9:35 PM EDTAreal Flood AdvisoryGYX3 hr
Jul 17, 12:14 PM EDTMesoscale DiscussionSPC2 hr
Jul 17, 6:58 PM EDTMesoscale DiscussionSPC62 min
Aug 2, 1:30 PM EDTMesoscale DiscussionSPC2 hr
Aug 5, 11:36 AM EDTMesoscale DiscussionSPC114 min
Aug 5, 3:16 PM EDTSpecial Weather StatementGYX59 min
Aug 5, 4:48 PM EDTSevere Thunderstorm WarningGYX23 min
Aug 9, 6:31 AM EDTDense Fog AdvisoryGYX107 min
Aug 9, 5:01 PM EDTSpecial Weather StatementGYX29 min
Aug 12, 6:32 PM EDTMesoscale DiscussionSPC118 min
Aug 18, 4:09 PM EDTAreal Flood AdvisoryGYX3 hr
Aug 18, 6:59 PM EDTAreal Flood AdvisoryGYX3 hr
Aug 22, 3:55 PM EDTSevere Thunderstorm WatchSPC8 hr
Aug 22, 5:49 PM EDTMesoscale DiscussionSPC116 min
Aug 22, 8:04 PM EDTMesoscale DiscussionSPC86 min
Aug 22, 9:20 PM EDTSevere Thunderstorm WarningGYX55 min
Aug 22, 9:52 PM EDTSevere Thunderstorm WarningGYX53 min
Aug 22, 10:08 PM EDTSevere Thunderstorm WarningGYX67 min
Sep 5, 3:46 PM EDTSpecial Weather StatementGYX29 min
Sep 5, 3:57 PM EDTSevere Thunderstorm WarningGYX48 min
Sep 5, 4:27 PM EDTSevere Thunderstorm WarningGYX48 min
Sep 5, 4:30 PM EDTMesoscale DiscussionSPC2 hr
Sep 5, 5:05 PM EDTSevere Thunderstorm WarningGYX40 min
Sep 5, 7:26 PM EDTSpecial Weather StatementBTV19 min
Sep 6, 3:29 AM EDTFlash Flood WatchGYX24 hr
Sep 25, 7:08 AM EDTDense Fog AdvisoryGYX112 min
Sep 25, 8:33 PM EDTDense Fog AdvisoryGYX12 hr
Sep 30, 3:19 AM EDTFrost AdvisoryGYX29 hr
Oct 12, 2:37 PM EDTFrost AdvisoryGYX16 hr
Oct 24, 10:04 PM EDTAreal Flood AdvisoryGYX6 hr
Oct 24, 11:43 PM EDTAreal Flood AdvisoryGYX4 hr
Oct 28, 3:55 AM EDTFlash Flood WatchGYX63 hr
Oct 29, 3:59 AM EDTHigh Wind WarningGYX30 hr
Oct 29, 3:59 AM EDTWind AdvisoryGYX38 hr
Oct 30, 1:19 AM EDTAreal Flood WarningGYX6 hr
Nov 9, 3:25 PM ESTWind AdvisoryGYX29 hr
Nov 10, 2:24 AM ESTSpecial Weather StatementGYX66 min
Nov 18, 2:48 PM ESTWind AdvisoryGYX30 hr
Dec 9, 3:22 AM ESTWinter Weather AdvisoryGYX24 hr
Dec 10, 3:16 PM ESTWinter Storm WatchGYX24 hr
Dec 11, 3:32 PM ESTWinter Storm WarningGYX44 hr
Dec 11, 3:32 PM ESTWinter Weather AdvisoryGYX32 hr
Dec 21, 3:45 PM ESTWinter Storm WatchGYX8 hr
Dec 21, 3:45 PM ESTWinter Weather AdvisoryGYX53 hr
Dec 21, 11:29 PM ESTWinter Storm WarningGYX27 hr
Dec 23, 9:50 AM ESTMesoscale DiscussionSPC4 hr
Dec 23, 2:59 PM ESTWinter Storm WatchGYX12 hr
Dec 24, 2:51 AM ESTWinter Storm WarningGYX36 hr
Dec 25, 4:36 AM ESTMesoscale DiscussionSPC5 hr
Dec 27, 3:55 AM ESTWind Chill AdvisoryGYX57 hr
Dec 30, 3:22 AM ESTWind Chill AdvisoryGYX24 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 archive20162018

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.