Alert archive / New York / Bronx County

Weather alerts in Bronx County, New York, 2009

146 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Bronx County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
146
Warnings
19
Watches
26
Advisories
63
Busiest month
July40 alerts
Busiest day
July 29, 200910 alerts

Over time

By month

Warning verification

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

Bronx County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings9544%2100%17 min
Flash flood warnings220%1100%93 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS New York, NY: tornado warnings12192%333%7 min
NWS New York, NY: severe thunderstorm warnings1196149%15485%25 min
NWS New York, NY: flash flood warnings452740%8480%41 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
Dec 31, 7:01 PM ESTWind AdvisoryOKX4 hr
Jan 6, 4:15 AM ESTWinter Weather AdvisoryOKX19 hr
Jan 6, 3:52 PM ESTCoastal Flood AdvisoryOKX12 hr
Jan 6, 11:22 PM ESTFreezing Rain AdvisoryOKX13 hr
Jan 7, 12:10 AM ESTMesoscale DiscussionSPC4 hr
Jan 7, 6:08 AM ESTMesoscale DiscussionSPC3 hr
Jan 7, 9:23 AM ESTAreal Flood AdvisoryOKX112 min
Jan 9, 3:51 AM ESTWinter Storm WatchOKX11 hr
Jan 9, 3:12 PM ESTWinter Storm WarningOKX33 hr
Jan 9, 3:12 PM ESTWinter Weather AdvisoryOKX42 hr
Jan 10, 7:58 PM ESTMesoscale DiscussionSPC4 hr
Jan 14, 3:07 PM ESTWinter Weather AdvisoryOKX25 hr
Jan 17, 4:08 PM ESTWinter Weather AdvisoryOKX23 hr
Jan 27, 4:13 AM ESTWinter Weather AdvisoryOKX36 hr
Jan 28, 12:31 AM ESTMesoscale DiscussionSPC5 hr
Feb 3, 4:03 AM ESTWinter Weather AdvisoryOKX23 hr
Feb 11, 3:49 AM ESTHigh Wind WatchOKX11 hr
Feb 11, 2:56 PM ESTWind AdvisoryOKX35 hr
Feb 12, 5:13 AM ESTHigh Wind WarningOKX15 hr
Feb 28, 3:37 AM ESTWinter Storm WatchOKX27 hr
Mar 1, 3:48 AM ESTWinter Storm WarningOKX39 hr
Mar 1, 9:09 PM ESTMesoscale DiscussionSPC4 hr
Mar 2, 12:41 AM ESTMesoscale DiscussionSPC4 hr
Apr 3, 2:08 PM EDTAreal Flood AdvisoryOKX82 min
Apr 3, 3:58 PM EDTWind AdvisoryOKX28 hr
Apr 21, 7:04 AM EDTDense Fog AdvisoryOKX5 hr
May 7, 1:41 PM EDTAreal Flood AdvisoryOKX64 min
May 7, 2:47 PM EDTAreal Flood AdvisoryOKX88 min
May 15, 10:44 PM EDTDense Fog AdvisoryOKX11 hr
May 24, 11:49 AM EDTMesoscale DiscussionSPC116 min
Jun 4, 3:57 PM EDTFlash Flood WatchOKX12 hr
Jun 9, 6:01 AM EDTMesoscale DiscussionSPC59 min
Jun 9, 8:23 AM EDTAreal Flood AdvisoryOKX112 min
Jun 12, 2:15 AM EDTAreal Flood AdvisoryOKX60 min
Jun 18, 5:02 AM EDTFlash Flood WatchOKX11 hr
Jun 19, 3:34 PM EDTFlood WatchOKX37 hr
Jun 21, 12:05 PM EDTCoastal Flood AdvisoryOKX12 hr
Jun 22, 2:16 PM EDTCoastal Flood WarningOKX11 hr
Jun 23, 3:20 PM EDTCoastal Flood AdvisoryOKX10 hr
Jun 26, 2:19 PM EDTMesoscale DiscussionSPC56 min
Jun 26, 2:42 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 26, 4:55 PM EDTSevere Thunderstorm WarningOKX50 min
Jun 26, 5:26 PM EDTSevere Thunderstorm WarningOKX64 min
Jun 26, 6:02 PM EDTAreal Flood AdvisoryOKX118 min
Jun 26, 6:19 PM EDTAreal Flood AdvisoryOKX116 min
Jun 26, 6:27 PM EDTSevere Thunderstorm WarningOKX45 min
Jun 26, 7:33 PM EDTMesoscale DiscussionSPC57 min
Jun 30, 2:18 PM EDTMesoscale DiscussionSPC57 min
Jun 30, 4:25 PM EDTMesoscale DiscussionSPC65 min
Jun 30, 4:51 PM EDTAreal Flood AdvisoryOKX2 hr
Jun 30, 6:06 PM EDTMesoscale DiscussionSPC54 min
Jul 1, 12:03 PM EDTMesoscale DiscussionSPC87 min
Jul 1, 3:49 PM EDTFlash Flood WatchOKX30 hr
Jul 2, 11:27 AM EDTAreal Flood AdvisoryOKX93 min
Jul 2, 1:02 PM EDTAreal Flood AdvisoryOKX88 min
Jul 2, 3:20 PM EDTMesoscale DiscussionSPC55 min
Jul 7, 11:05 AM EDTSevere Thunderstorm WatchSPC8 hr
Jul 7, 2:00 PM EDTMesoscale DiscussionSPC90 min
Jul 7, 3:18 PM EDTAreal Flood AdvisoryOKX59 min
Jul 7, 4:41 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 11:29 PM EDTSevere Thunderstorm WarningOKX61 min
Jul 16, 4:04 PM EDTMesoscale DiscussionSPC86 min
Jul 17, 6:18 PM EDTMesoscale DiscussionSPC57 min
Jul 21, 4:37 AM EDTCoastal Flood AdvisoryOKX20 hr
Jul 22, 5:35 AM EDTCoastal Flood AdvisoryOKX20 hr
Jul 22, 3:54 PM EDTFlood WatchOKX36 hr
Jul 23, 3:46 PM EDTCoastal Flood AdvisoryOKX12 hr
Jul 26, 4:35 AM EDTFlash Flood WatchOKX19 hr
Jul 26, 3:14 PM EDTMesoscale DiscussionSPC2 hr
Jul 26, 3:51 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 26, 5:59 PM EDTAreal Flood AdvisoryOKX2 hr
Jul 26, 6:20 PM EDTSevere Thunderstorm WarningOKX40 min
Jul 26, 6:37 PM EDTMesoscale DiscussionSPC113 min
Jul 26, 8:45 PM EDTAreal Flood AdvisoryOKX3 hr
Jul 26, 8:54 PM EDTSevere Thunderstorm WarningOKX39 min
Jul 26, 10:06 PM EDTMesoscale DiscussionSPC54 min
Jul 27, 2:20 PM EDTMesoscale DiscussionSPC55 min
Jul 29, 4:21 AM EDTFlash Flood WatchOKX24 hr
Jul 29, 12:22 PM EDTMesoscale DiscussionSPC23 min
Jul 29, 12:49 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 29, 2:22 PM EDTMesoscale DiscussionSPC23 min
Jul 29, 2:55 PM EDTFlash Flood WarningOKX2 hr
Jul 29, 5:05 PM EDTMesoscale DiscussionSPC55 min
Jul 29, 6:23 PM EDTAreal Flood AdvisoryOKX4 hr
Jul 29, 6:49 PM EDTSevere Thunderstorm WarningOKX29 min
Jul 29, 7:14 PM EDTMesoscale DiscussionSPC61 min
Jul 29, 7:58 PM EDTSevere Thunderstorm WarningOKX47 min
Jul 30, 3:50 PM EDTFlash Flood WatchOKX27 hr
Jul 31, 1:18 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 31, 3:05 PM EDTMesoscale DiscussionSPC85 min
Jul 31, 3:42 PM EDTAreal Flood AdvisoryOKX2 hr
Aug 2, 10:01 AM EDTMesoscale DiscussionSPC119 min
Aug 2, 12:07 PM EDTAreal Flood AdvisoryOKX3 hr
Aug 2, 12:23 PM EDTMesoscale DiscussionSPC2 hr
Aug 10, 1:41 AM EDTAreal Flood AdvisoryOKX2 hr
Aug 10, 4:40 PM EDTMesoscale DiscussionSPC2 hr
Aug 11, 3:58 AM EDTHeat AdvisoryOKX11 hr
Aug 12, 1:01 PM EDTMesoscale DiscussionSPC89 min
Aug 13, 4:35 AM EDTFlash Flood WatchOKX10 hr
Aug 17, 3:52 AM EDTHeat AdvisoryOKX63 hr
Aug 18, 10:15 PM EDTSevere Thunderstorm WarningOKX42 min
Aug 20, 3:46 PM EDTHeat AdvisoryOKX26 hr
Aug 21, 11:28 AM EDTSevere Thunderstorm WatchSPC7 hr
Aug 21, 3:37 PM EDTFlash Flood WatchOKX36 hr
Aug 21, 5:55 PM EDTMesoscale DiscussionSPC80 min
Aug 22, 2:47 AM EDTAreal Flood AdvisoryOKX3 hr
Aug 22, 1:01 PM EDTAreal Flood AdvisoryOKX89 min
Aug 22, 1:17 PM EDTFlash Flood WarningOKX88 min
Aug 23, 5:56 PM EDTAreal Flood AdvisoryOKX79 min
Aug 23, 6:41 PM EDTAreal Flood AdvisoryOKX66 min
Aug 28, 9:08 AM EDTAreal Flood AdvisoryOKX112 min
Aug 28, 4:03 PM EDTFlash Flood WatchOKX23 hr
Sep 9, 3:53 PM EDTCoastal Flood AdvisoryOKX51 hr
Sep 16, 3:50 AM EDTCoastal Flood AdvisoryOKX32 hr
Oct 6, 4:40 PM EDTWind AdvisoryOKX28 hr
Oct 14, 4:08 PM EDTCoastal Flood WatchOKX24 hr
Oct 15, 4:36 PM EDTCoastal Flood WatchOKX24 hr
Oct 15, 4:36 PM EDTCoastal Flood WarningOKX19 hr
Oct 16, 12:30 PM EDTCoastal Flood AdvisoryOKX25 hr
Oct 17, 10:59 AM EDTCoastal Flood WatchOKX4 hr
Oct 17, 3:18 PM EDTCoastal Flood WarningOKX23 hr
Oct 17, 3:47 PM EDTWind AdvisoryOKX24 hr
Oct 18, 2:28 PM EDTCoastal Flood AdvisoryOKX11 hr
Oct 24, 6:29 PM EDTAreal Flood AdvisoryOKX3 hr
Oct 24, 7:02 PM EDTMesoscale DiscussionSPC58 min
Nov 6, 4:22 AM ESTFrost AdvisoryOKX28 hr
Nov 12, 3:26 PM ESTCoastal Flood AdvisoryOKX19 hr
Nov 13, 4:44 PM ESTCoastal Flood WarningOKX17 hr
Nov 13, 4:44 PM ESTCoastal Flood AdvisoryOKX17 hr
Nov 27, 3:51 AM ESTWind AdvisoryOKX36 hr
Dec 2, 4:27 AM ESTHigh Wind WatchOKX11 hr
Dec 2, 3:37 PM ESTWind AdvisoryOKX17 hr
Dec 2, 4:08 PM ESTCoastal Flood AdvisoryOKX19 hr
Dec 3, 6:28 AM ESTMesoscale DiscussionSPC62 min
Dec 8, 2:06 PM ESTFlash Flood WatchOKX21 hr
Dec 8, 3:52 PM ESTWind AdvisoryOKX21 hr
Dec 9, 4:44 AM ESTWind AdvisoryOKX17 hr
Dec 10, 3:17 PM ESTWind AdvisoryOKX13 hr
Dec 18, 4:02 AM ESTWinter Storm WatchOKX36 hr
Dec 18, 3:57 PM ESTWinter Storm WarningOKX43 hr
Dec 19, 4:37 AM ESTCoastal Flood AdvisoryOKX17 hr
Dec 19, 12:27 PM ESTMesoscale DiscussionSPC6 hr
Dec 19, 7:25 PM ESTMesoscale DiscussionSPC5 hr
Dec 20, 12:32 AM ESTMesoscale DiscussionSPC4 hr
Dec 29, 3:54 AM ESTWind AdvisoryOKX15 hr
Dec 31, 3:52 AM ESTWinter Weather AdvisoryOKX25 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 archive20082010

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.