Alert archive / New York / Niagara County

Weather alerts in Niagara County, New York, 2011

90 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Niagara County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts
90
Warnings
16
Watches
19
Advisories
35
Busiest month
August14 alerts
Busiest day
August 1, 20116 alerts

Over time

By month

Warning verification

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

Niagara County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings7614%11100%26 min
Flash flood warnings00

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Buffalo, NY: tornado warnings13285%2100%9 min
NWS Buffalo, NY: severe thunderstorm warnings1065548%15181%23 min
NWS Buffalo, NY: flash flood warnings231057%2391%63 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 10, 3:26 PM ESTWinter Weather AdvisoryBUF49 hr
Jan 12, 12:29 PM ESTLake Effect Snow AdvisoryBUF24 hr
Jan 18, 3:23 AM ESTWinter Weather AdvisoryBUF8 hr
Jan 19, 4:30 AM ESTWinter Weather AdvisoryBUF10 hr
Jan 21, 4:21 AM ESTLake Effect Snow WarningBUF32 hr
Jan 21, 4:21 AM ESTLake Effect Snow AdvisoryBUF17 hr
Jan 22, 8:13 PM ESTLake Effect Snow AdvisoryBUF16 hr
Jan 23, 10:15 AM ESTWind Chill AdvisoryBUF23 hr
Jan 31, 4:11 AM ESTWinter Storm WatchBUF12 hr
Jan 31, 3:50 PM ESTWinter Storm WarningBUF42 hr
Feb 2, 4:12 AM ESTWinter Weather AdvisoryBUF23 hr
Feb 5, 4:07 AM ESTWinter Weather AdvisoryBUF23 hr
Feb 13, 3:45 PM ESTWind AdvisoryBUF23 hr
Feb 18, 4:37 AM ESTWind AdvisoryBUF35 hr
Feb 20, 4:06 AM ESTWinter Weather AdvisoryBUF27 hr
Feb 23, 3:30 PM ESTWinter Storm WatchBUF22 hr
Feb 24, 1:26 PM ESTWinter Storm WarningBUF28 hr
Feb 25, 2:46 AM ESTMesoscale DiscussionSPC4 hr
Feb 27, 2:47 PM ESTFlood WatchBUF30 hr
Mar 4, 3:45 AM ESTFlood WatchBUF47 hr
Mar 5, 11:52 AM ESTWinter Storm WatchBUF10 hr
Mar 5, 9:28 PM ESTWinter Weather AdvisoryBUF13 hr
Mar 9, 11:41 AM ESTFlood WatchBUF46 hr
Mar 22, 4:02 PM EDTWinter Weather AdvisoryBUF30 hr
Mar 23, 3:32 AM EDTMesoscale DiscussionSPC4 hr
Apr 3, 3:55 PM EDTFlood WatchBUF30 hr
Apr 7, 5:04 AM EDTDense Fog AdvisoryBUF4 hr
Apr 11, 1:12 PM EDTWind AdvisoryBUF9 hr
Apr 15, 3:47 PM EDTWind AdvisoryBUF30 hr
Apr 16, 4:36 AM EDTHigh Wind WatchBUF11 hr
Apr 16, 3:33 PM EDTWind AdvisoryBUF12 hr
Apr 17, 3:36 AM EDTHigh Wind WarningBUF14 hr
Apr 25, 3:54 AM EDTFlood WatchBUF22 hr
Apr 27, 1:58 PM EDTFlash Flood WatchBUF22 hr
Apr 27, 1:58 PM EDTWind AdvisoryBUF26 hr
Apr 27, 3:10 PM EDTTornado WatchSPC7 hr
Apr 28, 4:39 AM EDTHigh Wind WarningBUF15 hr
May 14, 11:38 PM EDTAreal Flood AdvisoryBUF3 hr
May 15, 4:15 AM EDTFlood WatchBUF23 hr
May 25, 9:41 PM EDTAreal Flood AdvisoryBUF3 hr
May 26, 7:03 AM EDTSpecial Weather StatementBUF57 min
May 29, 8:52 PM EDTSevere Thunderstorm WatchSPC5 hr
May 29, 9:24 PM EDTSpecial Weather StatementBUF51 min
May 29, 9:47 PM EDTMesoscale DiscussionSPC58 min
Jun 8, 12:22 AM EDTMesoscale DiscussionSPC83 min
Jun 9, 3:29 AM EDTMesoscale DiscussionSPC2 hr
Jun 9, 3:56 AM EDTSevere Thunderstorm WatchSPC6 hr
Jun 22, 2:14 AM EDTSpecial Weather StatementBUF91 min
Jun 23, 3:27 PM EDTMesoscale DiscussionSPC2 hr
Jun 23, 4:18 PM EDTAreal Flood AdvisoryBUF62 min
Jul 6, 4:10 PM EDTSpecial Weather StatementBUF35 min
Jul 18, 3:58 PM EDTMesoscale DiscussionSPC92 min
Jul 20, 3:35 AM EDTExcessive Heat WatchBUF12 hr
Jul 20, 3:17 PM EDTExcessive Heat WarningBUF28 hr
Jul 29, 10:27 AM EDTAreal Flood AdvisoryBUF3 hr
Aug 1, 3:26 AM EDTSevere Thunderstorm WarningBUF49 min
Aug 1, 3:47 AM EDTMesoscale DiscussionSPC58 min
Aug 1, 3:56 AM EDTSevere Thunderstorm WarningBUF64 min
Aug 1, 4:54 AM EDTSevere Thunderstorm WarningBUF66 min
Aug 1, 8:01 AM EDTMesoscale DiscussionSPC89 min
Aug 1, 3:07 PM EDTSpecial Weather StatementBUF53 min
Aug 7, 12:53 PM EDTSpecial Weather StatementBUF52 min
Aug 7, 1:50 PM EDTAreal Flood AdvisoryBUF109 min
Aug 18, 1:35 PM EDTAreal Flood AdvisoryBUF3 hr
Aug 18, 3:43 PM EDTSpecial Weather StatementBUF62 min
Aug 18, 3:46 PM EDTSevere Thunderstorm WarningBUF44 min
Aug 24, 9:18 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 24, 9:56 PM EDTSevere Thunderstorm WarningBUF64 min
Aug 25, 3:23 AM EDTSpecial Weather StatementBUF52 min
Sep 4, 3:26 AM EDTSevere Thunderstorm WatchSPC4 hr
Sep 4, 4:09 AM EDTSevere Thunderstorm WarningBUF57 min
Sep 4, 4:41 AM EDTSevere Thunderstorm WarningBUF45 min
Sep 11, 5:21 PM EDTAreal Flood AdvisoryBUF114 min
Sep 13, 2:44 PM EDTMesoscale DiscussionSPC91 min
Sep 21, 7:34 PM EDTSpecial Weather StatementBUF56 min
Sep 21, 7:44 PM EDTSpecial Weather StatementBUF61 min
Sep 30, 8:34 AM EDTAreal Flood AdvisoryBUF3 hr
Sep 30, 11:33 AM EDTAreal Flood AdvisoryBUF117 min
Sep 30, 3:35 PM EDTWind AdvisoryBUF27 hr
Oct 6, 3:25 PM EDTFrost AdvisoryBUF16 hr
Oct 13, 3:58 PM EDTHigh Wind WatchBUF24 hr
Oct 14, 3:51 PM EDTHigh Wind WarningBUF35 hr
Oct 16, 3:55 PM EDTWind AdvisoryBUF27 hr
Oct 19, 3:49 PM EDTWind AdvisoryBUF12 hr
Oct 22, 3:34 PM EDTFrost AdvisoryBUF17 hr
Oct 27, 3:48 AM EDTFreeze WarningBUF29 hr
Nov 29, 6:10 PM ESTDense Fog AdvisoryBUF3 hr
Dec 7, 3:30 PM ESTLake Effect Snow WatchBUF21 hr
Dec 8, 12:14 PM ESTLake Effect Snow WarningBUF34 hr
Dec 27, 4:28 AM ESTWinter Weather AdvisoryBUF45 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 archive20102012

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.