Alert archive / New York / Suffolk County
Weather alerts in Suffolk County, New York, 2009
176 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Suffolk County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 176
- Warnings
- 32
- Watches
- 20
- Advisories
- 96
- Busiest month
- July41 alerts
- Busiest day
- June 26, 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.
Suffolk County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 11 | 31% | 8 | 88% | 29 min |
| Flash flood warnings | 3 | 2 | 33% | 3 | 67% | 92 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New York, NY: tornado warnings | 12 | 1 | 92% | 3 | 33% | 7 min |
| NWS New York, NY: severe thunderstorm warnings | 119 | 61 | 49% | 154 | 85% | 25 min |
| NWS New York, NY: flash flood warnings | 45 | 27 | 40% | 84 | 80% | 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Dec 31, 7:01 PM EST | Wind Advisory | OKX | 4 hr |
| Jan 6, 4:15 AM EST | Winter Weather Advisory | OKX | 19 hr |
| Jan 6, 3:52 PM EST | Coastal Flood Advisory | OKX | 12 hr |
| Jan 6, 11:22 PM EST | Freezing Rain Advisory | OKX | 13 hr |
| Jan 7, 9:23 AM EST | Areal Flood Advisory | OKX | 112 min |
| Jan 7, 11:53 AM EST | Areal Flood Advisory | OKX | 112 min |
| Jan 7, 4:01 PM EST | Wind Advisory | OKX | 24 hr |
| Jan 9, 3:51 AM EST | Winter Storm Watch | OKX | 11 hr |
| Jan 9, 3:12 PM EST | Winter Storm Warning | OKX | 33 hr |
| Jan 9, 3:12 PM EST | Winter Weather Advisory | OKX | 42 hr |
| Jan 14, 3:07 PM EST | Winter Weather Advisory | OKX | 25 hr |
| Jan 17, 4:08 PM EST | Winter Weather Advisory | OKX | 23 hr |
| Jan 18, 8:17 PM EST | Winter Weather Advisory | OKX | 6 hr |
| Jan 27, 4:13 AM EST | Winter Weather Advisory | OKX | 36 hr |
| Jan 28, 3:16 PM EST | Dense Fog Advisory | OKX | 4 hr |
| Feb 3, 4:03 AM EST | Winter Weather Advisory | OKX | 23 hr |
| Feb 11, 3:49 AM EST | High Wind Watch | OKX | 11 hr |
| Feb 11, 2:56 PM EST | Wind Advisory | OKX | 35 hr |
| Feb 12, 5:13 AM EST | High Wind Warning | OKX | 15 hr |
| Feb 28, 3:37 AM EST | Winter Storm Watch | OKX | 27 hr |
| Mar 1, 3:48 AM EST | Winter Storm Warning | OKX | 39 hr |
| Mar 1, 9:09 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 2, 12:41 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 2, 3:17 AM EST | High Wind Warning | OKX | 4 hr |
| Mar 29, 8:25 PM EDT | Severe Thunderstorm Warning | OKX | 65 min |
| Apr 3, 3:58 PM EDT | Wind Advisory | OKX | 28 hr |
| Apr 3, 5:51 PM EDT | Dense Fog Advisory | OKX | 3 hr |
| Apr 21, 7:04 AM EDT | Dense Fog Advisory | OKX | 5 hr |
| Apr 21, 8:36 PM EDT | Dense Fog Advisory | OKX | 8 hr |
| Apr 23, 4:43 AM EDT | Frost Advisory | OKX | 27 hr |
| Apr 29, 2:50 PM EDT | Freeze Warning | OKX | 14 hr |
| May 7, 11:17 PM EDT | Dense Fog Advisory | OKX | 4 hr |
| May 15, 10:44 PM EDT | Dense Fog Advisory | OKX | 11 hr |
| May 16, 6:13 PM EDT | Dense Fog Advisory | OKX | 7 hr |
| May 18, 4:02 AM EDT | Frost Advisory | OKX | 28 hr |
| May 28, 12:20 AM EDT | Dense Fog Advisory | OKX | 11 hr |
| May 29, 8:10 PM EDT | Dense Fog Advisory | OKX | 5 hr |
| Jun 9, 8:23 AM EDT | Areal Flood Advisory | OKX | 112 min |
| Jun 9, 9:11 AM EDT | Areal Flood Advisory | OKX | 94 min |
| Jun 12, 2:15 AM EDT | Areal Flood Advisory | OKX | 60 min |
| Jun 12, 3:08 AM EDT | Areal Flood Advisory | OKX | 82 min |
| Jun 12, 4:33 AM EDT | Areal Flood Advisory | OKX | 57 min |
| Jun 15, 5:31 PM EDT | Areal Flood Advisory | OKX | 71 hr |
| Jun 19, 3:34 PM EDT | Flood Watch | OKX | 37 hr |
| Jun 20, 8:57 PM EDT | Areal Flood Advisory | OKX | 2 hr |
| Jun 20, 9:24 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Jun 20, 11:19 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jun 22, 2:16 PM EDT | Coastal Flood Warning | OKX | 11 hr |
| Jun 22, 2:16 PM EDT | Coastal Flood Advisory | OKX | 8 hr |
| Jun 26, 2:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 5:53 PM EDT | Severe Thunderstorm Warning | OKX | 52 min |
| Jun 26, 6:18 PM EDT | Severe Thunderstorm Warning | OKX | 42 min |
| Jun 26, 6:19 PM EDT | Areal Flood Advisory | OKX | 116 min |
| Jun 26, 6:31 PM EDT | Severe Thunderstorm Warning | OKX | 44 min |
| Jun 26, 6:56 PM EDT | Severe Thunderstorm Warning | OKX | 49 min |
| Jun 26, 6:59 PM EDT | Severe Thunderstorm Warning | OKX | 46 min |
| Jun 26, 7:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 1, 11:43 AM EDT | Areal Flood Advisory | OKX | 92 min |
| Jul 1, 12:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 1, 12:55 PM EDT | Areal Flood Advisory | OKX | 118 min |
| Jul 1, 1:23 PM EDT | Flash Flood Warning | OKX | 104 min |
| Jul 1, 3:49 PM EDT | Flash Flood Watch | OKX | 30 hr |
| Jul 2, 3:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 3, 1:44 PM EDT | Areal Flood Advisory | OKX | 61 min |
| Jul 7, 11:05 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 7, 1:30 PM EDT | Severe Thunderstorm Warning | OKX | 45 min |
| Jul 7, 2:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 7, 3:02 PM EDT | Severe Thunderstorm Warning | OKX | 43 min |
| Jul 7, 3:31 PM EDT | Severe Thunderstorm Warning | OKX | 44 min |
| Jul 7, 3:34 PM EDT | Flash Flood Warning | OKX | 117 min |
| Jul 7, 3:46 PM EDT | Areal Flood Advisory | OKX | 119 min |
| Jul 7, 4:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 11:29 PM EDT | Severe Thunderstorm Warning | OKX | 61 min |
| Jul 8, 12:09 AM EDT | Areal Flood Advisory | OKX | 51 min |
| Jul 8, 12:15 AM EDT | Severe Thunderstorm Warning | OKX | 45 min |
| Jul 21, 4:37 AM EDT | Coastal Flood Advisory | OKX | 20 hr |
| Jul 21, 8:50 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 21, 2:55 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 22, 5:35 AM EDT | Coastal Flood Advisory | OKX | 20 hr |
| Jul 22, 3:54 PM EDT | Flood Watch | OKX | 36 hr |
| Jul 23, 3:46 PM EDT | Coastal Flood Advisory | OKX | 12 hr |
| Jul 23, 8:19 PM EDT | Areal Flood Advisory | OKX | 5 hr |
| Jul 23, 9:01 PM EDT | Coastal Flood Warning | OKX | 7 hr |
| Jul 24, 1:04 AM EDT | Areal Flood Advisory | OKX | 86 min |
| Jul 24, 2:36 AM EDT | Areal Flood Advisory | OKX | 114 min |
| Jul 25, 4:55 PM EDT | Coastal Flood Statement | OKX | 28 hr |
| Jul 26, 4:35 AM EDT | Flash Flood Watch | OKX | 19 hr |
| Jul 26, 3:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 3:51 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 26, 6:55 PM EDT | Severe Thunderstorm Warning | OKX | 50 min |
| Jul 28, 6:00 PM EDT | Coastal Flood Statement | OKX | 27 hr |
| Jul 29, 7:58 PM EDT | Severe Thunderstorm Warning | OKX | 47 min |
| Jul 30, 3:50 PM EDT | Flash Flood Watch | OKX | 27 hr |
| Jul 30, 5:35 PM EDT | Coastal Flood Statement | OKX | 27 hr |
| Jul 31, 1:18 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 3:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 31, 4:32 PM EDT | Severe Thunderstorm Warning | OKX | 58 min |
| Jul 31, 4:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 2, 12:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 9:29 PM EDT | Severe Thunderstorm Warning | OKX | 27 min |
| Aug 12, 10:31 PM EDT | Areal Flood Advisory | OKX | 89 min |
| Aug 15, 3:41 PM EDT | Areal Flood Advisory | OKX | 64 min |
| Aug 21, 4:38 AM EDT | Coastal Flood Statement | OKX | 8 hr |
| Aug 21, 12:35 PM EDT | Coastal Flood Advisory | OKX | 48 hr |
| Aug 21, 12:35 PM EDT | High Surf Advisory | OKX | 58 hr |
| Aug 21, 5:55 PM EDT | Mesoscale Discussion | SPC | 80 min |
| Aug 22, 5:41 AM EDT | Areal Flood Advisory | OKX | 64 min |
| Aug 23, 11:02 PM EDT | Coastal Flood Statement | OKX | 46 hr |
| Aug 28, 4:03 PM EDT | Flash Flood Watch | OKX | 23 hr |
| Aug 28, 4:30 PM EDT | High Surf Advisory | OKX | 53 hr |
| Aug 29, 11:54 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Sep 5, 4:24 AM EDT | Coastal Flood Statement | OKX | 17 hr |
| Sep 6, 4:19 AM EDT | Coastal Flood Statement | OKX | 17 hr |
| Sep 8, 5:06 PM EDT | Coastal Flood Statement | OKX | 36 hr |
| Sep 9, 3:53 PM EDT | Coastal Flood Advisory | OKX | 51 hr |
| Sep 9, 5:52 PM EDT | Coastal Flood Statement | OKX | 11 hr |
| Sep 10, 4:57 AM EDT | High Surf Advisory | OKX | 39 hr |
| Sep 11, 4:15 PM EDT | Areal Flood Advisory | OKX | 105 min |
| Sep 11, 6:04 PM EDT | Areal Flood Advisory | OKX | 116 min |
| Sep 15, 5:01 PM EDT | Coastal Flood Statement | OKX | 11 hr |
| Sep 16, 3:50 AM EDT | Coastal Flood Advisory | OKX | 32 hr |
| Sep 16, 4:19 AM EDT | Coastal Flood Statement | OKX | 13 hr |
| Sep 16, 4:45 PM EDT | Coastal Flood Statement | OKX | 28 hr |
| Sep 16, 11:33 PM EDT | Coastal Flood Statement | OKX | 6 hr |
| Sep 28, 7:12 PM EDT | Severe Thunderstorm Warning | OKX | 48 min |
| Oct 3, 3:42 AM EDT | Areal Flood Advisory | OKX | 2 hr |
| Oct 3, 5:47 AM EDT | Areal Flood Advisory | OKX | 88 min |
| Oct 3, 9:08 AM EDT | Areal Flood Advisory | OKX | 112 min |
| Oct 6, 4:40 PM EDT | Wind Advisory | OKX | 28 hr |
| Oct 11, 4:14 AM EDT | Frost Advisory | OKX | 29 hr |
| Oct 14, 4:08 PM EDT | Coastal Flood Watch | OKX | 24 hr |
| Oct 15, 4:36 PM EDT | Coastal Flood Watch | OKX | 24 hr |
| Oct 15, 4:36 PM EDT | Coastal Flood Warning | OKX | 19 hr |
| Oct 16, 12:30 PM EDT | Coastal Flood Advisory | OKX | 25 hr |
| Oct 17, 10:59 AM EDT | Coastal Flood Watch | OKX | 4 hr |
| Oct 17, 3:18 PM EDT | Coastal Flood Warning | OKX | 23 hr |
| Oct 17, 3:47 PM EDT | Wind Advisory | OKX | 24 hr |
| Oct 18, 2:28 PM EDT | Coastal Flood Advisory | OKX | 11 hr |
| Oct 19, 9:18 AM EDT | Coastal Flood Advisory | OKX | 3 hr |
| Oct 19, 10:15 PM EDT | Frost Advisory | OKX | 10 hr |
| Oct 22, 1:39 AM EDT | Dense Fog Advisory | OKX | 4 hr |
| Oct 24, 6:29 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Oct 24, 8:50 PM EDT | Areal Flood Advisory | OKX | 115 min |
| Oct 24, 10:52 PM EDT | Areal Flood Advisory | OKX | 53 min |
| Oct 28, 3:27 PM EDT | Wind Advisory | OKX | 7 hr |
| Nov 6, 4:22 AM EST | Freeze Warning | OKX | 28 hr |
| Nov 11, 5:03 PM EST | Coastal Flood Watch | OKX | 22 hr |
| Nov 11, 5:03 PM EST | Coastal Flood Advisory | OKX | 25 hr |
| Nov 12, 3:26 PM EST | Coastal Flood Advisory | OKX | 19 hr |
| Nov 13, 10:55 AM EST | Coastal Flood Advisory | OKX | 9 hr |
| Nov 13, 10:55 AM EST | High Surf Advisory | OKX | 40 hr |
| Nov 13, 4:44 PM EST | Coastal Flood Warning | OKX | 17 hr |
| Nov 13, 4:44 PM EST | Coastal Flood Advisory | OKX | 17 hr |
| Nov 14, 10:04 AM EST | Coastal Flood Advisory | OKX | 23 hr |
| Nov 27, 3:51 AM EST | Wind Advisory | OKX | 36 hr |
| Dec 2, 4:27 AM EST | High Wind Watch | OKX | 11 hr |
| Dec 2, 3:37 PM EST | Wind Advisory | OKX | 17 hr |
| Dec 2, 4:08 PM EST | Coastal Flood Advisory | OKX | 19 hr |
| Dec 2, 4:08 PM EST | High Surf Advisory | OKX | 32 hr |
| Dec 3, 6:10 AM EST | Coastal Flood Warning | OKX | 4 hr |
| Dec 3, 6:28 AM EST | Mesoscale Discussion | SPC | 62 min |
| Dec 8, 2:06 PM EST | Flash Flood Watch | OKX | 21 hr |
| Dec 8, 3:52 PM EST | Wind Advisory | OKX | 21 hr |
| Dec 9, 4:44 AM EST | Wind Advisory | OKX | 17 hr |
| Dec 9, 11:14 AM EST | Coastal Flood Advisory | OKX | 2 hr |
| Dec 10, 3:17 PM EST | Wind Advisory | OKX | 13 hr |
| Dec 18, 4:02 AM EST | Blizzard Watch | OKX | 12 hr |
| Dec 18, 3:57 PM EST | Blizzard Warning | OKX | 43 hr |
| Dec 19, 4:37 AM EST | Coastal Flood Advisory | OKX | 17 hr |
| Dec 19, 7:25 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 20, 12:32 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 26, 5:58 PM EST | Areal Flood Advisory | OKX | 77 min |
| Dec 26, 7:48 PM EST | Areal Flood Advisory | OKX | 3 hr |
| Dec 27, 2:51 AM EST | Coastal Flood Advisory | OKX | 3 hr |
| Dec 29, 3:54 AM EST | Wind Advisory | OKX | 15 hr |
| Dec 31, 3:52 AM EST | Winter Weather Advisory | OKX | 25 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 16 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 15 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 5 |
| Flood Watch | 2 |
| Areal Flood Advisory | 35 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 8 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 13 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
| Coast and beach | |
| Coastal Flood Warning | 6 |
| Coastal Flood Watch | 4 |
| Coastal Flood Advisory | 20 |
| High Surf Advisory | 5 |
| Coastal Flood Statement | 13 |
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.