Alert archive / New York / Schenectady County

Weather alerts in Schenectady County, New York, 2009

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

Schenectady County and its neighbors

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

Alerts
119
Warnings
27
Watches
21
Advisories
36
Busiest month
July32 alerts
Busiest day
July 1, 20098 alerts

Over time

By month

Warning verification

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

Schenectady County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings141029%8100%21 min
Flash flood warnings4325%367%72 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Albany, NY: tornado warnings10100%0
NWS Albany, NY: severe thunderstorm warnings1497550%18291%25 min
NWS Albany, NY: flash flood warnings352140%5671%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 5, 3:16 PM ESTWinter Storm WatchALY22 hr
Jan 6, 4:49 AM ESTWinter Storm WarningALY50 hr
Jan 7, 12:10 AM ESTMesoscale DiscussionSPC4 hr
Jan 7, 6:08 AM ESTMesoscale DiscussionSPC3 hr
Jan 7, 11:39 AM ESTMesoscale DiscussionSPC6 hr
Jan 7, 3:55 PM ESTWinter Weather AdvisoryALY13 hr
Jan 10, 3:05 AM ESTWinter Storm WarningALY31 hr
Jan 10, 7:58 PM ESTMesoscale DiscussionSPC4 hr
Jan 26, 11:37 AM ESTWinter Storm WatchALY28 hr
Jan 27, 11:10 AM ESTWinter Storm WarningALY41 hr
Jan 28, 7:53 AM ESTMesoscale DiscussionSPC5 hr
Jan 28, 12:26 PM ESTMesoscale DiscussionSPC6 hr
Feb 11, 2:42 AM ESTFlood WatchALY55 hr
Feb 11, 3:22 PM ESTWind AdvisoryALY30 hr
Feb 18, 3:46 AM ESTWinter Weather AdvisoryALY31 hr
Feb 18, 6:28 PM ESTMesoscale DiscussionSPC4 hr
Feb 21, 4:42 PM ESTWinter Weather AdvisoryALY30 hr
Feb 27, 4:27 AM ESTFlood WatchALY21 hr
Mar 1, 4:00 PM ESTWinter Weather AdvisoryALY28 hr
Mar 7, 3:38 AM ESTFlood WatchALY61 hr
Mar 8, 7:15 PM EDTAreal Flood AdvisoryALY3 hr
Mar 8, 10:38 PM EDTRiver Flood WarningALY21 hr
Mar 8, 11:09 PM EDTAreal Flood WarningALY34 hr
Mar 10, 4:02 AM EDTFlood WatchALY32 hr
Mar 28, 3:06 PM EDTFlood WatchALY24 hr
Apr 3, 3:40 PM EDTWind AdvisoryALY26 hr
Apr 29, 3:42 AM EDTFrost AdvisoryALY28 hr
May 9, 11:52 AM EDTMesoscale DiscussionSPC83 min
May 9, 12:43 PM EDTSevere Thunderstorm WatchSPC6 hr
May 9, 2:56 PM EDTMesoscale DiscussionSPC94 min
May 10, 3:56 AM EDTFrost AdvisoryALY27 hr
May 11, 6:34 AM EDTFrost AdvisoryALY25 hr
May 12, 10:54 AM EDTFrost AdvisoryALY21 hr
May 14, 8:52 AM EDTWind AdvisoryALY9 hr
May 16, 6:29 PM EDTMesoscale DiscussionSPC2 hr
May 17, 4:11 AM EDTFreeze WarningALY24 hr
May 18, 4:21 AM EDTFrost AdvisoryALY14 hr
May 18, 4:21 AM EDTFreeze WarningALY28 hr
Jun 9, 3:40 PM EDTMesoscale DiscussionSPC65 min
Jun 15, 4:59 PM EDTSevere Thunderstorm WarningALY46 min
Jun 15, 5:41 PM EDTSevere Thunderstorm WarningALY34 min
Jun 15, 6:16 PM EDTSevere Thunderstorm WarningALY59 min
Jun 15, 6:18 PM EDTSevere Thunderstorm WarningALY57 min
Jun 15, 6:20 PM EDTAreal Flood AdvisoryALY2 hr
Jun 25, 5:30 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 26, 12:06 PM EDTMesoscale DiscussionSPC54 min
Jun 26, 12:32 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 26, 8:58 PM EDTSevere Thunderstorm WarningALY47 min
Jun 30, 10:57 AM EDTMesoscale DiscussionSPC93 min
Jun 30, 11:37 AM EDTSevere Thunderstorm WatchSPC7 hr
Jun 30, 2:18 PM EDTMesoscale DiscussionSPC57 min
Jun 30, 3:16 PM EDTFlash Flood WatchALY55 hr
Jun 30, 3:35 PM EDTSevere Thunderstorm WarningALY55 min
Jun 30, 3:49 PM EDTAreal Flood AdvisoryALY4 hr
Jun 30, 4:25 PM EDTMesoscale DiscussionSPC65 min
Jul 1, 2:10 PM EDTAreal Flood AdvisoryALY3 hr
Jul 1, 2:26 PM EDTFlash Flood WarningALY6 hr
Jul 1, 2:43 PM EDTSevere Thunderstorm WarningALY62 min
Jul 1, 2:55 PM EDTSevere Thunderstorm WatchSPC4 hr
Jul 1, 4:08 PM EDTSevere Thunderstorm WarningALY67 min
Jul 1, 4:49 PM EDTAreal Flood AdvisoryALY3 hr
Jul 1, 5:01 PM EDTFlash Flood WarningALY4 hr
Jul 1, 5:44 PM EDTMesoscale DiscussionSPC61 min
Jul 3, 4:00 AM EDTFlash Flood WatchALY9 hr
Jul 7, 11:05 AM EDTSevere Thunderstorm WatchSPC8 hr
Jul 7, 2:00 PM EDTMesoscale DiscussionSPC90 min
Jul 7, 3:58 PM EDTSevere Thunderstorm WarningALY62 min
Jul 7, 4:36 PM EDTSevere Thunderstorm WarningALY54 min
Jul 7, 4:41 PM EDTMesoscale DiscussionSPC2 hr
Jul 11, 2:37 PM EDTMesoscale DiscussionSPC83 min
Jul 16, 12:04 PM EDTMesoscale DiscussionSPC86 min
Jul 16, 1:39 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 16, 4:42 PM EDTSevere Thunderstorm WarningALY63 min
Jul 16, 4:55 PM EDTMesoscale DiscussionSPC65 min
Jul 16, 5:19 PM EDTSevere Thunderstorm WarningALY56 min
Jul 16, 5:32 PM EDTAreal Flood AdvisoryALY93 min
Jul 17, 4:49 AM EDTDense Fog AdvisoryALY3 hr
Jul 26, 1:13 PM EDTMesoscale DiscussionSPC2 hr
Jul 26, 3:51 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 29, 3:45 AM EDTFlash Flood WatchALY26 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, 5:05 PM EDTMesoscale DiscussionSPC55 min
Jul 29, 6:09 PM EDTFlash Flood WarningALY3 hr
Jul 31, 7:31 AM EDTAreal Flood AdvisoryALY3 hr
Jul 31, 9:14 AM EDTFlash Flood WarningALY6 hr
Aug 2, 11:54 AM EDTMesoscale DiscussionSPC2 hr
Aug 10, 4:40 PM EDTMesoscale DiscussionSPC2 hr
Aug 10, 5:09 PM EDTSevere Thunderstorm WatchSPC5 hr
Aug 10, 8:15 PM EDTMesoscale DiscussionSPC2 hr
Aug 16, 7:57 PM EDTSevere Thunderstorm WarningALY63 min
Aug 19, 1:21 PM EDTMesoscale DiscussionSPC84 min
Aug 21, 10:01 AM EDTMesoscale DiscussionSPC119 min
Aug 21, 10:47 AM EDTSevere Thunderstorm WatchSPC7 hr
Aug 21, 12:28 PM EDTSevere Thunderstorm WarningALY62 min
Aug 21, 12:29 PM EDTAreal Flood AdvisoryALY2 hr
Sep 8, 6:06 AM EDTDense Fog AdvisoryALY3 hr
Sep 19, 3:18 AM EDTFrost AdvisoryALY29 hr
Sep 23, 1:18 PM EDTMesoscale DiscussionSPC57 min
Sep 23, 6:16 PM EDTMesoscale DiscussionSPC89 min
Sep 25, 11:22 AM EDTFrost AdvisoryALY21 hr
Oct 7, 4:21 AM EDTWind AdvisoryALY16 hr
Oct 10, 4:10 AM EDTFrost AdvisoryALY28 hr
Oct 11, 3:07 AM EDTFreeze WarningALY30 hr
Oct 28, 11:21 AM EDTAreal Flood AdvisoryALY6 hr
Oct 31, 12:15 PM EDTWind AdvisoryALY6 hr
Nov 27, 4:10 AM ESTWind AdvisoryALY33 hr
Dec 3, 6:22 AM ESTAreal Flood AdvisoryALY3 hr
Dec 5, 3:44 AM ESTWinter Weather AdvisoryALY19 hr
Dec 8, 4:25 AM ESTWinter Weather AdvisoryALY31 hr
Dec 8, 4:54 PM ESTWinter Storm WarningALY22 hr
Dec 8, 11:32 PM ESTMesoscale DiscussionSPC6 hr
Dec 13, 10:00 AM ESTFreezing Rain AdvisoryALY10 hr
Dec 25, 4:47 AM ESTFreezing Rain AdvisoryALY49 hr
Dec 25, 5:03 PM ESTMesoscale DiscussionSPC6 hr
Dec 26, 12:37 AM ESTMesoscale DiscussionSPC4 hr
Dec 27, 7:02 AM ESTAreal Flood AdvisoryALY4 hr
Dec 29, 6:06 AM ESTWind AdvisoryALY13 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.