Alert archive / New York / Herkimer County
Weather alerts in Herkimer County, New York, 2009
144 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Herkimer County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 144
- Warnings
- 41
- Watches
- 21
- Advisories
- 58
- Busiest month
- May20 alerts
- Busiest day
- June 26, 20096 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Herkimer County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 9 | 31% | 14 | 79% | 31 min |
| Flash flood warnings | 2 | 1 | 50% | 4 | 25% | 14 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Albany, NY: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Albany, NY: severe thunderstorm warnings | 149 | 75 | 50% | 182 | 91% | 25 min |
| NWS Albany, NY: flash flood warnings | 35 | 21 | 40% | 56 | 71% | 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 2:59 PM EST | Lake Effect Snow Advisory | ALY | 14 hr |
| Jan 4, 9:26 PM EST | Winter Weather Advisory | ALY | 6 hr |
| Jan 5, 3:16 PM EST | Winter Storm Watch | ALY | 22 hr |
| Jan 6, 4:49 AM EST | Winter Storm Warning | ALY | 50 hr |
| Jan 8, 9:40 AM EST | Lake Effect Snow Advisory | ALY | 8 hr |
| Jan 10, 3:05 AM EST | Winter Storm Warning | ALY | 31 hr |
| Jan 10, 3:05 AM EST | Winter Weather Advisory | ALY | 31 hr |
| Jan 13, 4:01 AM EST | Winter Weather Advisory | ALY | 20 hr |
| Jan 13, 4:03 PM EST | Wind Chill Advisory | ALY | 19 hr |
| Jan 16, 3:51 AM EST | Wind Chill Advisory | ALY | 8 hr |
| Jan 16, 3:46 PM EST | Wind Chill Advisory | ALY | 17 hr |
| Jan 24, 3:18 AM EST | Wind Chill Advisory | ALY | 12 hr |
| Jan 24, 3:17 PM EST | Wind Chill Warning | ALY | 17 hr |
| Jan 26, 11:37 AM EST | Winter Storm Watch | ALY | 28 hr |
| Jan 27, 11:10 AM EST | Winter Storm Warning | ALY | 41 hr |
| Jan 28, 7:53 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 28, 12:26 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 11, 2:42 AM EST | Flood Watch | ALY | 55 hr |
| Feb 11, 3:22 PM EST | Wind Advisory | ALY | 30 hr |
| Feb 12, 11:47 AM EST | Areal Flood Advisory | ALY | 24 days |
| Feb 17, 3:18 PM EST | Winter Storm Watch | ALY | 12 hr |
| Feb 18, 3:46 AM EST | Winter Weather Advisory | ALY | 31 hr |
| Feb 19, 2:55 PM EST | Lake Effect Snow Advisory | ALY | 24 hr |
| Feb 20, 4:35 PM EST | Lake Effect Snow Advisory | ALY | 12 hr |
| Feb 20, 4:59 PM EST | Lake Effect Snow Warning | ALY | 11 hr |
| Feb 21, 4:07 AM EST | Winter Storm Watch | ALY | 13 hr |
| Feb 21, 4:42 PM EST | Winter Weather Advisory | ALY | 30 hr |
| Feb 27, 4:27 AM EST | Flood Watch | ALY | 21 hr |
| Feb 28, 3:20 AM EST | Areal Flood Advisory | ALY | 16 hr |
| Mar 2, 4:45 PM EST | Wind Chill Advisory | ALY | 15 hr |
| Mar 5, 3:23 PM EST | Freezing Rain Advisory | ALY | 15 hr |
| Mar 7, 3:38 AM EST | Flood Watch | ALY | 61 hr |
| Mar 7, 8:42 PM EST | Areal Flood Warning | ALY | 20 hr |
| Mar 8, 1:44 AM EST | River Flood Warning | ALY | 8 hr |
| Mar 8, 5:39 AM EDT | River Flood Warning | ALY | 4 days |
| Mar 8, 6:42 AM EDT | River Flood Warning | ALY | 8 hr |
| Mar 8, 4:02 PM EDT | Winter Weather Advisory | ALY | 24 hr |
| Mar 9, 12:00 AM EDT | Areal Flood Warning | ALY | 35 hr |
| Mar 10, 4:02 AM EDT | Flood Watch | ALY | 32 hr |
| Mar 12, 10:11 AM EDT | River Flood Advisory | ALY | 25 hr |
| Mar 28, 3:06 PM EDT | Flood Watch | ALY | 24 hr |
| Mar 30, 2:19 PM EDT | River Flood Warning | ALY | 18 hr |
| Apr 3, 12:23 PM EDT | Flood Watch | ALY | 15 hr |
| Apr 3, 3:40 PM EDT | Wind Advisory | ALY | 26 hr |
| Apr 4, 2:19 AM EDT | River Flood Warning | ALY | 45 hr |
| Apr 4, 2:50 PM EDT | River Flood Warning | ALY | 15 hr |
| Apr 7, 2:54 PM EDT | Lake Effect Snow Advisory | ALY | 19 hr |
| Apr 29, 3:42 AM EDT | Frost Advisory | ALY | 28 hr |
| May 9, 11:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| May 9, 12:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 9, 2:19 PM EDT | Severe Thunderstorm Warning | ALY | 56 min |
| May 9, 3:52 PM EDT | Severe Thunderstorm Warning | ALY | 53 min |
| May 10, 3:56 AM EDT | Frost Advisory | ALY | 27 hr |
| May 11, 6:34 AM EDT | Frost Advisory | ALY | 25 hr |
| May 12, 10:54 AM EDT | Frost Advisory | ALY | 21 hr |
| May 14, 8:52 AM EDT | Wind Advisory | ALY | 9 hr |
| May 14, 11:35 AM EDT | High Wind Warning | ALY | 7 hr |
| May 16, 2:51 PM EDT | Severe Thunderstorm Warning | ALY | 54 min |
| May 16, 3:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| May 16, 5:57 PM EDT | Areal Flood Advisory | ALY | 3 hr |
| May 17, 4:11 AM EDT | Freeze Warning | ALY | 24 hr |
| May 17, 11:31 AM EDT | River Flood Warning | ALY | 21 hr |
| May 18, 4:21 AM EDT | Freeze Warning | ALY | 28 hr |
| May 25, 4:12 AM EDT | Frost Advisory | ALY | 27 hr |
| May 25, 4:12 AM EDT | Freeze Warning | ALY | 27 hr |
| May 27, 9:29 AM EDT | Areal Flood Advisory | ALY | 3 hr |
| May 31, 3:17 AM EDT | Frost Advisory | ALY | 28 hr |
| May 31, 3:17 AM EDT | Freeze Warning | ALY | 28 hr |
| Jun 4, 3:39 AM EDT | Frost Advisory | ALY | 24 hr |
| Jun 9, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 9, 2:02 PM EDT | Severe Thunderstorm Warning | ALY | 58 min |
| Jun 11, 10:59 PM EDT | Areal Flood Advisory | ALY | 6 hr |
| Jun 18, 11:15 AM EDT | Areal Flood Advisory | ALY | 3 hr |
| Jun 25, 3:57 PM EDT | Severe Thunderstorm Warning | ALY | 63 min |
| Jun 26, 12:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 26, 12:32 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 4:03 PM EDT | Severe Thunderstorm Warning | ALY | 57 min |
| Jun 26, 4:26 PM EDT | Areal Flood Advisory | ALY | 81 min |
| Jun 26, 4:45 PM EDT | Flash Flood Warning | ALY | 52 min |
| Jun 26, 6:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 30, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 12:59 PM EDT | Severe Thunderstorm Warning | ALY | 61 min |
| Jun 30, 2:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 30, 3:16 PM EDT | Flash Flood Watch | ALY | 55 hr |
| Jul 1, 2:55 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 1, 5:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 3, 4:00 AM EDT | Flash Flood Watch | ALY | 9 hr |
| Jul 7, 11:05 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 7, 1:47 PM EDT | Severe Thunderstorm Warning | ALY | 58 min |
| Jul 7, 2:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 7, 2:37 PM EDT | Severe Thunderstorm Warning | ALY | 53 min |
| Jul 7, 4:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 10:31 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 11, 10:57 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 7:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 11, 11:18 PM EDT | Severe Thunderstorm Warning | ALY | 57 min |
| Jul 16, 12:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 16, 1:39 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 16, 3:01 PM EDT | Severe Thunderstorm Warning | ALY | 59 min |
| Jul 16, 4:00 PM EDT | Severe Thunderstorm Warning | ALY | 60 min |
| Jul 26, 1:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 29, 2:22 PM EDT | Mesoscale Discussion | SPC | 23 min |
| Aug 2, 11:54 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 2:00 PM EDT | Areal Flood Advisory | ALY | 3 hr |
| Aug 4, 6:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 10, 5:09 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 10, 8:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 12:33 AM EDT | Areal Flood Advisory | ALY | 6 hr |
| Aug 12, 4:38 PM EDT | Areal Flood Advisory | ALY | 93 min |
| Aug 18, 2:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 22, 9:52 PM EDT | Areal Flood Advisory | ALY | 3 hr |
| Aug 22, 10:11 PM EDT | Flash Flood Warning | ALY | 2 hr |
| Aug 23, 3:06 PM EDT | Areal Flood Advisory | ALY | 80 min |
| Aug 27, 4:07 AM EDT | Frost Advisory | ALY | 16 hr |
| Aug 31, 3:16 AM EDT | Frost Advisory | ALY | 25 hr |
| Sep 8, 6:06 AM EDT | Dense Fog Advisory | ALY | 3 hr |
| Sep 9, 1:06 PM EDT | Frost Advisory | ALY | 14 hr |
| Sep 19, 3:18 AM EDT | Frost Advisory | ALY | 29 hr |
| Sep 19, 3:18 AM EDT | Freeze Warning | ALY | 29 hr |
| Sep 23, 1:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Sep 23, 6:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 25, 6:25 AM EDT | Freeze Warning | ALY | 26 hr |
| Sep 25, 11:22 AM EDT | Frost Advisory | ALY | 21 hr |
| Oct 7, 4:21 AM EDT | Wind Advisory | ALY | 16 hr |
| Oct 7, 6:27 AM EDT | Severe Thunderstorm Warning | ALY | 48 min |
| Oct 10, 4:10 AM EDT | Frost Advisory | ALY | 28 hr |
| Oct 11, 3:07 AM EDT | Freeze Warning | ALY | 30 hr |
| Oct 28, 11:21 AM EDT | Areal Flood Advisory | ALY | 6 hr |
| Nov 27, 4:10 AM EST | Wind Advisory | ALY | 33 hr |
| Dec 8, 4:25 AM EST | Winter Weather Advisory | ALY | 31 hr |
| Dec 8, 4:54 PM EST | Winter Storm Warning | ALY | 22 hr |
| Dec 8, 11:32 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 9, 3:22 PM EST | Lake Effect Snow Warning | ALY | 61 hr |
| Dec 10, 7:51 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 13, 10:00 AM EST | Freezing Rain Advisory | ALY | 10 hr |
| Dec 17, 8:16 AM EST | Wind Chill Advisory | ALY | 26 hr |
| Dec 25, 4:47 AM EST | Winter Weather Advisory | ALY | 49 hr |
| Dec 25, 4:47 AM EST | Freezing Rain Advisory | ALY | 49 hr |
| Dec 26, 12:37 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 26, 2:59 PM EST | Ice Storm Warning | ALY | 6 hr |
| Dec 27, 2:58 PM EST | Winter Storm Warning | ALY | 39 hr |
| Dec 27, 2:58 PM EST | Winter Weather Advisory | ALY | 42 hr |
| Dec 28, 4:18 PM EST | Wind Chill Advisory | ALY | 41 hr |
| Dec 29, 6:06 AM EST | Wind Advisory | ALY | 13 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.