Alert archive / New York / Nassau County
Weather alerts in Nassau County, New York, 2020
235 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Nassau County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 235
- Warnings
- 29
- Watches
- 16
- Advisories
- 76
- Busiest month
- August38 alerts
- Busiest day
- July 22, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Nassau County in 2020 had a tornado report inside them.
Nassau County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 12 | 10 | 17% | 16 | 94% | 23 min |
| Flash flood warnings | 6 | 5 | 17% | 15 | 93% | 56 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New York, NY: tornado warnings | 8 | 1 | 88% | 3 | 33% | 2 min |
| NWS New York, NY: severe thunderstorm warnings | 104 | 62 | 40% | 196 | 85% | 26 min |
| NWS New York, NY: flash flood warnings | 30 | 17 | 43% | 64 | 88% | 68 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 4, 11:36 AM EST | Dense Fog Advisory | OKX | 6 hr |
| Jan 7, 3:39 PM EST | Wind Advisory | OKX | 27 hr |
| Jan 8, 3:43 PM EST | Special Weather Statement | OKX | 32 min |
| Jan 11, 1:12 PM EST | Wind Advisory | OKX | 24 hr |
| Jan 15, 1:19 PM EST | Wind Advisory | OKX | 30 hr |
| Jan 17, 3:54 AM EST | Winter Weather Advisory | OKX | 45 hr |
| Jan 24, 3:27 AM EST | Coastal Flood Watch | OKX | 12 hr |
| Jan 24, 3:27 AM EST | Coastal Flood Statement | OKX | 36 hr |
| Jan 24, 3:16 PM EST | Coastal Flood Advisory | OKX | 24 hr |
| Feb 6, 3:37 PM EST | Wind Advisory | OKX | 30 hr |
| Feb 6, 8:13 PM EST | High Wind Warning | OKX | 23 hr |
| Feb 7, 3:34 AM EST | Coastal Flood Statement | OKX | 3 hr |
| Feb 7, 8:27 AM EST | Dense Fog Advisory | OKX | 3 hr |
| Feb 7, 11:43 AM EST | Special Weather Statement | OKX | 32 min |
| Feb 27, 10:08 AM EST | Wind Advisory | OKX | 8 hr |
| Mar 3, 10:31 PM EST | Special Weather Statement | OKX | 44 min |
| Mar 6, 3:57 PM EST | Coastal Flood Statement | OKX | 19 hr |
| Mar 6, 3:57 PM EST | Coastal Flood Advisory | OKX | 16 hr |
| Mar 7, 3:43 PM EST | Coastal Flood Statement | OKX | 17 hr |
| Mar 12, 3:40 AM EDT | Coastal Flood Statement | OKX | 24 hr |
| Mar 12, 3:40 AM EDT | Coastal Flood Advisory | OKX | 24 hr |
| Mar 13, 4:15 AM EDT | Coastal Flood Statement | OKX | 11 hr |
| Mar 13, 7:32 AM EDT | Special Weather Statement | OKX | 88 min |
| Mar 20, 5:40 AM EDT | Dense Fog Advisory | OKX | 8 hr |
| Mar 23, 3:37 PM EDT | Coastal Flood Statement | OKX | 9 hr |
| Mar 25, 4:06 AM EDT | Coastal Flood Statement | OKX | 19 hr |
| Apr 2, 3:47 PM EDT | Coastal Flood Statement | OKX | 17 hr |
| Apr 3, 3:45 AM EDT | Coastal Flood Statement | OKX | 19 hr |
| Apr 3, 3:45 AM EDT | Coastal Flood Advisory | OKX | 31 hr |
| Apr 3, 4:04 PM EDT | Coastal Flood Advisory | OKX | 18 hr |
| Apr 4, 12:16 PM EDT | Coastal Flood Statement | OKX | 10 hr |
| Apr 4, 10:10 PM EDT | Coastal Flood Statement | OKX | 12 hr |
| Apr 6, 3:46 PM EDT | Coastal Flood Statement | OKX | 43 hr |
| Apr 6, 3:46 PM EDT | Coastal Flood Statement | OKX | 46 hr |
| Apr 7, 4:25 PM EDT | Coastal Flood Advisory | OKX | 34 hr |
| Apr 8, 3:39 PM EDT | Coastal Flood Advisory | OKX | 22 hr |
| Apr 8, 3:39 PM EDT | Coastal Flood Advisory | OKX | 33 hr |
| Apr 8, 3:44 PM EDT | Wind Advisory | OKX | 28 hr |
| Apr 9, 11:09 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 9, 12:01 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 9, 1:34 PM EDT | Severe Thunderstorm Warning | OKX | 41 min |
| Apr 9, 2:15 PM EDT | Severe Thunderstorm Warning | OKX | 45 min |
| Apr 9, 2:40 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Apr 11, 4:12 PM EDT | High Wind Watch | OKX | 24 hr |
| Apr 12, 3:54 PM EDT | High Wind Warning | OKX | 27 hr |
| Apr 12, 5:01 PM EDT | Coastal Flood Advisory | OKX | 25 hr |
| Apr 13, 9:41 AM EDT | Areal Flood Advisory | OKX | 2 hr |
| Apr 13, 2:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 15, 3:27 PM EDT | Freeze Watch | OKX | 24 hr |
| Apr 16, 3:20 PM EDT | Freeze Warning | OKX | 17 hr |
| Apr 20, 3:51 PM EDT | Wind Advisory | OKX | 30 hr |
| Apr 21, 12:20 PM EDT | Special Weather Statement | OKX | 40 min |
| Apr 21, 1:27 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 21, 2:33 PM EDT | Tornado Warning | OKX | 27 min |
| Apr 21, 2:56 PM EDT | Severe Thunderstorm Warning | OKX | 49 min |
| Apr 26, 5:26 AM EDT | Coastal Flood Statement | OKX | 19 hr |
| Apr 30, 4:00 AM EDT | Coastal Flood Statement | OKX | 26 hr |
| Apr 30, 10:47 AM EDT | Wind Advisory | OKX | 12 hr |
| May 5, 3:37 PM EDT | Coastal Flood Advisory | OKX | 33 hr |
| May 6, 4:52 PM EDT | Coastal Flood Statement | OKX | 33 hr |
| May 6, 4:52 PM EDT | Coastal Flood Advisory | OKX | 33 hr |
| May 7, 3:41 PM EDT | Coastal Flood Statement | OKX | 34 hr |
| May 7, 3:41 PM EDT | Coastal Flood Advisory | OKX | 34 hr |
| May 11, 2:16 PM EDT | Special Weather Statement | OKX | 29 min |
| May 11, 4:17 PM EDT | Special Weather Statement | OKX | 28 min |
| May 18, 3:34 PM EDT | High Surf Advisory | OKX | 72 hr |
| May 19, 4:29 AM EDT | Coastal Flood Advisory | OKX | 17 hr |
| May 21, 5:21 PM EDT | Rip Current Statement | OKX | 3 days |
| May 23, 6:52 AM EDT | Dense Fog Advisory | OKX | 3 hr |
| May 27, 7:53 PM EDT | Dense Fog Advisory | OKX | 11 hr |
| May 28, 3:57 PM EDT | Rip Current Statement | OKX | 52 hr |
| Jun 2, 5:13 PM EDT | Rip Current Statement | OKX | 3 days |
| Jun 3, 3:53 AM EDT | Coastal Flood Statement | OKX | 20 hr |
| Jun 3, 6:46 PM EDT | Coastal Flood Statement | OKX | 29 hr |
| Jun 3, 6:46 PM EDT | Coastal Flood Advisory | OKX | 30 hr |
| Jun 3, 6:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 3, 9:03 PM EDT | Special Weather Statement | OKX | 42 min |
| Jun 4, 6:19 PM EDT | Rip Current Statement | OKX | 27 hr |
| Jun 4, 8:54 PM EDT | Coastal Flood Statement | OKX | 25 hr |
| Jun 5, 12:19 AM EDT | Special Weather Statement | OKX | 41 min |
| Jun 5, 12:56 AM EDT | Special Weather Statement | OKX | 49 min |
| Jun 6, 3:24 AM EDT | Coastal Flood Statement | OKX | 20 hr |
| Jun 6, 2:16 PM EDT | Special Weather Statement | OKX | 59 min |
| Jun 6, 2:33 PM EDT | Special Weather Statement | OKX | 42 min |
| Jun 6, 3:18 PM EDT | Severe Thunderstorm Warning | OKX | 26 min |
| Jun 6, 4:45 PM EDT | Special Weather Statement | OKX | 45 min |
| Jun 7, 3:47 AM EDT | Coastal Flood Statement | OKX | 20 hr |
| Jun 10, 4:02 PM EDT | Rip Current Statement | OKX | 29 hr |
| Jun 11, 1:39 PM EDT | Areal Flood Advisory | OKX | 66 min |
| Jun 11, 2:44 PM EDT | Flash Flood Warning | OKX | 91 min |
| Jun 12, 5:25 AM EDT | Dense Fog Advisory | OKX | 3 hr |
| Jun 26, 5:04 PM EDT | Rip Current Statement | OKX | 28 hr |
| Jun 27, 12:34 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 12:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 28, 7:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 29, 5:49 PM EDT | Areal Flood Advisory | OKX | 48 min |
| Jul 1, 1:07 PM EDT | Areal Flood Advisory | OKX | 53 min |
| Jul 1, 5:19 PM EDT | Special Weather Statement | OKX | 56 min |
| Jul 1, 6:02 PM EDT | Severe Thunderstorm Warning | OKX | 28 min |
| Jul 1, 10:26 PM EDT | Special Weather Statement | OKX | 49 min |
| Jul 1, 10:46 PM EDT | Special Weather Statement | OKX | 44 min |
| Jul 2, 5:25 AM EDT | Coastal Flood Statement | OKX | 16 hr |
| Jul 3, 6:06 AM EDT | Coastal Flood Statement | OKX | 16 hr |
| Jul 3, 5:01 PM EDT | Special Weather Statement | OKX | 59 min |
| Jul 3, 6:04 PM EDT | Special Weather Statement | OKX | 41 min |
| Jul 3, 7:15 PM EDT | Areal Flood Advisory | OKX | 100 min |
| Jul 4, 4:06 AM EDT | Coastal Flood Advisory | OKX | 19 hr |
| Jul 6, 5:03 PM EDT | Severe Thunderstorm Warning | OKX | 42 min |
| Jul 9, 4:22 AM EDT | Rip Current Statement | OKX | 5 days |
| Jul 9, 4:05 PM EDT | Flash Flood Watch | OKX | 29 hr |
| Jul 9, 5:39 PM EDT | Tropical Storm Warning | OKX | 32 hr |
| Jul 9, 8:35 PM EDT | High Surf Advisory | OKX | 48 hr |
| Jul 10, 1:11 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 10, 3:23 PM EDT | Flash Flood Warning | OKX | 82 min |
| Jul 17, 3:41 PM EDT | Heat Advisory | OKX | 3 days |
| Jul 18, 6:52 AM EDT | Dense Fog Advisory | OKX | 2 hr |
| Jul 22, 1:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 2:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 22, 3:27 PM EDT | Heat Advisory | OKX | 28 hr |
| Jul 22, 6:01 PM EDT | Special Weather Statement | OKX | 44 min |
| Jul 22, 6:58 PM EDT | Severe Thunderstorm Warning | OKX | 47 min |
| Jul 22, 7:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 22, 7:29 PM EDT | Areal Flood Advisory | OKX | 91 min |
| Jul 22, 7:42 PM EDT | Special Weather Statement | OKX | 33 min |
| Jul 23, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 6:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 24, 10:20 AM EDT | Areal Flood Advisory | OKX | 55 min |
| Jul 25, 2:57 PM EDT | Heat Advisory | OKX | 3 days |
| Jul 30, 1:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 31, 2:14 AM EDT | Special Weather Statement | OKX | 46 min |
| Aug 1, 5:42 AM EDT | Rip Current Statement | OKX | 15 hr |
| Aug 2, 12:31 PM EDT | Rip Current Statement | OKX | 3 days |
| Aug 2, 6:00 PM EDT | Tropical Storm Watch | OKX | 17 hr |
| Aug 3, 5:20 AM EDT | Tropical Storm Warning | OKX | 39 hr |
| Aug 3, 5:55 AM EDT | Coastal Flood Watch | OKX | 11 hr |
| Aug 3, 4:43 PM EDT | Coastal Flood Warning | OKX | 24 hr |
| Aug 3, 4:43 PM EDT | Coastal Flood Advisory | OKX | 33 hr |
| Aug 3, 4:43 PM EDT | High Surf Advisory | OKX | 35 hr |
| Aug 3, 8:51 PM EDT | Special Weather Statement | OKX | 39 min |
| Aug 3, 8:56 PM EDT | Severe Thunderstorm Warning | OKX | 49 min |
| Aug 3, 9:06 PM EDT | Special Weather Statement | OKX | 39 min |
| Aug 4, 6:45 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 4, 7:23 AM EDT | Tornado Watch | SPC | 9 hr |
| Aug 4, 11:13 AM EDT | Mesoscale Discussion | SPC | 92 min |
| Aug 9, 3:52 PM EDT | Heat Advisory | OKX | 3 days |
| Aug 12, 1:22 PM EDT | Areal Flood Advisory | OKX | 83 min |
| Aug 12, 2:23 PM EDT | Areal Flood Advisory | OKX | 82 min |
| Aug 12, 2:56 PM EDT | Areal Flood Advisory | OKX | 94 min |
| Aug 12, 3:14 PM EDT | Flash Flood Warning | OKX | 113 min |
| Aug 13, 10:53 AM EDT | Flash Flood Warning | OKX | 86 min |
| Aug 15, 4:15 PM EDT | Rip Current Statement | OKX | 26 hr |
| Aug 16, 3:40 AM EDT | Coastal Flood Statement | OKX | 16 hr |
| Aug 17, 9:44 PM EDT | Special Weather Statement | OKX | 61 min |
| Aug 18, 3:57 PM EDT | Coastal Flood Statement | OKX | 6 hr |
| Aug 19, 4:31 AM EDT | Coastal Flood Statement | OKX | 17 hr |
| Aug 20, 5:10 AM EDT | Coastal Flood Statement | OKX | 18 hr |
| Aug 20, 4:13 PM EDT | Rip Current Statement | OKX | 29 hr |
| Aug 25, 11:45 AM EDT | Rip Current Statement | OKX | 9 hr |
| Aug 25, 3:12 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 25, 4:01 PM EDT | Special Weather Statement | OKX | 44 min |
| Aug 25, 6:00 PM EDT | Severe Thunderstorm Warning | OKX | 45 min |
| Aug 25, 6:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 25, 6:26 PM EDT | Severe Thunderstorm Warning | OKX | 32 min |
| Aug 27, 6:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 27, 8:14 PM EDT | Severe Thunderstorm Warning | OKX | 31 min |
| Aug 28, 5:38 AM EDT | Rip Current Statement | OKX | 40 hr |
| Aug 29, 6:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 4:19 PM EDT | Rip Current Statement | OKX | 52 hr |
| Sep 1, 2:31 AM EDT | Coastal Flood Statement | OKX | 21 hr |
| Sep 2, 5:01 PM EDT | Rip Current Statement | OKX | 27 hr |
| Sep 10, 4:48 AM EDT | Areal Flood Advisory | OKX | 87 min |
| Sep 10, 5:59 AM EDT | Flash Flood Warning | OKX | 2 hr |
| Sep 10, 6:19 AM EDT | Areal Flood Advisory | OKX | 116 min |
| Sep 10, 8:00 AM EDT | Flash Flood Warning | OKX | 60 min |
| Sep 10, 9:16 PM EDT | Areal Flood Advisory | OKX | 89 min |
| Sep 11, 5:06 PM EDT | Rip Current Statement | OKX | 5 days |
| Sep 13, 4:04 PM EDT | High Surf Advisory | OKX | 48 hr |
| Sep 17, 3:47 PM EDT | Coastal Flood Statement | OKX | 19 hr |
| Sep 18, 4:11 AM EDT | Coastal Flood Advisory | OKX | 20 hr |
| Sep 18, 4:44 PM EDT | Coastal Flood Statement | OKX | 47 hr |
| Sep 18, 4:44 PM EDT | Coastal Flood Advisory | OKX | 21 hr |
| Sep 18, 4:44 PM EDT | Coastal Flood Advisory | OKX | 46 hr |
| Sep 18, 4:44 PM EDT | High Surf Advisory | OKX | 5 days |
| Sep 19, 4:41 AM EDT | Rip Current Statement | OKX | 5 days |
| Sep 20, 4:12 AM EDT | Coastal Flood Statement | OKX | 21 hr |
| Sep 20, 4:47 PM EDT | Coastal Flood Statement | OKX | 24 hr |
| Sep 20, 4:47 PM EDT | Coastal Flood Advisory | OKX | 24 hr |
| Sep 21, 6:55 AM EDT | Coastal Flood Statement | OKX | 33 hr |
| Sep 21, 6:55 AM EDT | Coastal Flood Advisory | OKX | 35 hr |
| Sep 22, 4:59 AM EDT | Coastal Flood Advisory | OKX | 35 hr |
| Sep 30, 3:36 AM EDT | Special Weather Statement | OKX | 54 min |
| Oct 6, 3:15 PM EDT | Wind Advisory | OKX | 31 hr |
| Oct 11, 10:04 PM EDT | Coastal Flood Advisory | OKX | 21 hr |
| Oct 12, 9:45 PM EDT | Coastal Flood Statement | OKX | 12 hr |
| Oct 16, 4:00 AM EDT | Coastal Flood Statement | OKX | 5 hr |
| Oct 17, 3:54 PM EDT | Coastal Flood Statement | OKX | 22 hr |
| Oct 18, 3:56 PM EDT | Coastal Flood Statement | OKX | 23 hr |
| Oct 21, 12:25 AM EDT | Dense Fog Advisory | OKX | 9 hr |
| Oct 21, 10:23 PM EDT | Dense Fog Advisory | OKX | 11 hr |
| Oct 27, 12:30 AM EDT | Dense Fog Advisory | OKX | 5 hr |
| Oct 29, 6:08 AM EDT | Coastal Flood Advisory | OKX | 32 hr |
| Oct 30, 6:48 PM EDT | Coastal Flood Statement | OKX | 5 hr |
| Nov 1, 3:05 PM EST | Wind Advisory | OKX | 26 hr |
| Nov 10, 3:12 AM EST | Dense Fog Advisory | OKX | 6 hr |
| Nov 12, 4:02 AM EST | Coastal Flood Statement | OKX | 31 hr |
| Nov 12, 4:02 AM EST | Coastal Flood Advisory | OKX | 31 hr |
| Nov 13, 3:35 AM EST | Coastal Flood Statement | OKX | 30 hr |
| Nov 14, 4:25 AM EST | Coastal Flood Statement | OKX | 32 hr |
| Nov 14, 3:34 PM EST | Wind Advisory | OKX | 32 hr |
| Nov 15, 3:32 AM EST | Coastal Flood Statement | OKX | 18 hr |
| Nov 15, 2:24 PM EST | Coastal Flood Statement | OKX | 20 hr |
| Nov 15, 3:33 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 15, 7:01 PM EST | Mesoscale Discussion | SPC | 59 min |
| Nov 15, 7:32 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Nov 15, 8:41 PM EST | Severe Thunderstorm Warning | OKX | 64 min |
| Nov 15, 9:37 PM EST | Mesoscale Discussion | SPC | 113 min |
| Nov 29, 3:17 PM EST | Wind Advisory | OKX | 20 hr |
| Nov 30, 10:54 AM EST | Wind Advisory | OKX | 11 hr |
| Nov 30, 5:41 PM EST | Special Weather Statement | OKX | 49 min |
| Nov 30, 8:36 PM EST | Coastal Flood Statement | OKX | 12 hr |
| Dec 4, 4:05 PM EST | Coastal Flood Statement | OKX | 24 hr |
| Dec 13, 12:07 PM EST | Coastal Flood Statement | OKX | 21 hr |
| Dec 14, 4:00 PM EST | Winter Storm Watch | OKX | 36 hr |
| Dec 15, 3:40 PM EST | Winter Storm Warning | OKX | 45 hr |
| Dec 15, 3:41 PM EST | Coastal Flood Watch | OKX | 23 hr |
| Dec 15, 3:41 PM EST | Coastal Flood Advisory | OKX | 37 hr |
| Dec 16, 2:51 PM EST | Coastal Flood Warning | OKX | 12 hr |
| Dec 16, 2:51 PM EST | Coastal Flood Warning | OKX | 23 hr |
| Dec 16, 2:51 PM EST | Coastal Flood Advisory | OKX | 23 hr |
| Dec 16, 5:31 PM EST | Special Weather Statement | OKX | 74 min |
| Dec 16, 6:48 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 17, 1:23 PM EST | Special Weather Statement | OKX | 82 min |
| Dec 22, 3:49 PM EST | High Wind Watch | OKX | 23 hr |
| Dec 23, 2:55 PM EST | High Wind Warning | OKX | 41 hr |
| Dec 24, 4:27 AM EST | Coastal Flood Advisory | OKX | 28 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 | 12 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 29 |
| Flooding | |
| Flash Flood Warning | 6 |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 14 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 2 |
| Wind Advisory | 13 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
| Tropical | |
| Tropical Storm Warning | 2 |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| Coastal Flood Warning | 3 |
| Coastal Flood Watch | 3 |
| Coastal Flood Advisory | 28 |
| High Surf Advisory | 5 |
| Coastal Flood Statement | 48 |
| Rip Current Statement | 17 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.