Alert archive / Maryland / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Maryland, 2013
167 severe thunderstorm warnings in 2013. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Severe Thunderstorm Warnings
- 167
- Busiest month
- June76 severe thunderstorm warnings
- Busiest day
- June 28, 201324 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
117 of 167 severe thunderstorm warnings covering Maryland in 2013 had a qualifying storm report inside them; 201 of 280 hail, wind and damage reports fell inside a warning, on average 22 minutes after it went out.
Maryland, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 167 | 117 | 30% | 280 | 72% | 22 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 127 | 69 | 46% | 212 | 73% | 24 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 262 | 223 | 15% | 746 | 84% | 24 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 210 | 141 | 33% | 495 | 74% | 21 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 97 | 78 | 20% | 287 | 84% | 21 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 | Counties | Lasted |
|---|---|---|---|---|
| Jan 30, 11:09 AM EST | Severe Thunderstorm Warning | PBZ | Garrett | 66 min |
| Jan 30, 7:41 PM EST | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Charles, Howard, Montgomery, Prince George's and 1 more | 49 min |
| Jan 31, 1:52 AM EST | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 53 min |
| Jan 31, 1:54 AM EST | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 66 min |
| Apr 12, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 39 min |
| Apr 12, 7:04 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 41 min |
| Apr 19, 6:31 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 44 min |
| Apr 19, 6:48 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Montgomery, Prince George's | 42 min |
| Apr 19, 7:00 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 45 min |
| Apr 19, 7:18 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 42 min |
| Apr 19, 7:22 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 38 min |
| Apr 19, 7:29 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 61 min |
| Apr 19, 7:44 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 46 min |
| Apr 19, 8:00 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 30 min |
| Apr 19, 8:08 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 52 min |
| Apr 24, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 31 min |
| May 8, 3:39 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 36 min |
| May 8, 4:42 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 48 min |
| May 11, 4:48 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 42 min |
| May 11, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 42 min |
| May 11, 5:49 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 41 min |
| May 22, 5:25 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 50 min |
| May 22, 6:23 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 37 min |
| May 23, 5:44 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 61 min |
| May 23, 6:16 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 44 min |
| May 23, 10:43 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Montgomery, Prince George's | 47 min |
| May 28, 6:37 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 38 min |
| May 28, 7:31 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 44 min |
| May 28, 7:58 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 47 min |
| May 28, 8:43 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 92 min |
| Jun 2, 3:08 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 37 min |
| Jun 10, 5:22 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 23 min |
| Jun 10, 5:42 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 48 min |
| Jun 13, 12:14 AM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 31 min |
| Jun 13, 1:09 AM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 66 min |
| Jun 13, 6:26 AM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 49 min |
| Jun 13, 6:53 AM EDT | Severe Thunderstorm Warning | LWX | Washington | 52 min |
| Jun 13, 7:26 AM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 49 min |
| Jun 13, 7:52 AM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 38 min |
| Jun 13, 8:07 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Harford | 38 min |
| Jun 13, 8:40 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 65 min |
| Jun 13, 8:40 AM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 50 min |
| Jun 13, 9:03 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, Howard, City of Baltimore | 42 min |
| Jun 13, 9:18 AM EDT | Severe Thunderstorm Warning | PHI | Cecil | 57 min |
| Jun 13, 9:26 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 49 min |
| Jun 13, 9:29 AM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 31 min |
| Jun 13, 9:55 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 35 min |
| Jun 13, 2:56 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 49 min |
| Jun 13, 3:29 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery, Prince George's | 61 min |
| Jun 13, 3:53 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 67 min |
| Jun 13, 4:06 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, Prince George's, City of Baltimore | 54 min |
| Jun 13, 4:14 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset | 31 min |
| Jun 13, 4:27 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico, Worcester | 48 min |
| Jun 13, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 68 min |
| Jun 13, 4:44 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset | 46 min |
| Jun 13, 5:33 PM EDT | Severe Thunderstorm Warning | AKQ | Worcester | 27 min |
| Jun 17, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 69 min |
| Jun 24, 12:54 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 51 min |
| Jun 24, 1:19 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 56 min |
| Jun 24, 1:22 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 53 min |
| Jun 24, 2:18 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 57 min |
| Jun 24, 3:10 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 50 min |
| Jun 24, 3:51 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 39 min |
| Jun 24, 4:06 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 39 min |
| Jun 24, 4:27 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 48 min |
| Jun 24, 6:08 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 37 min |
| Jun 25, 8:57 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 48 min |
| Jun 25, 9:10 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 50 min |
| Jun 25, 9:20 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 40 min |
| Jun 25, 9:37 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 38 min |
| Jun 25, 9:55 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Frederick, Harford, Howard and 1 more | 65 min |
| Jun 25, 10:06 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Howard, Montgomery | 54 min |
| Jun 25, 10:28 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 62 min |
| Jun 25, 10:33 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Charles, Montgomery, Prince George's | 57 min |
| Jun 25, 11:01 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 59 min |
| Jun 26, 2:46 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 44 min |
| Jun 26, 3:20 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 55 min |
| Jun 26, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 55 min |
| Jun 26, 4:50 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard, City of Baltimore | 40 min |
| Jun 27, 1:51 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 24 min |
| Jun 28, 2:35 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 70 min |
| Jun 28, 2:43 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 32 min |
| Jun 28, 3:09 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 36 min |
| Jun 28, 3:19 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 41 min |
| Jun 28, 3:26 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 34 min |
| Jun 28, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 29 min |
| Jun 28, 3:33 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 27 min |
| Jun 28, 3:37 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 23 min |
| Jun 28, 3:45 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 30 min |
| Jun 28, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 25 min |
| Jun 28, 3:53 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 37 min |
| Jun 28, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 33 min |
| Jun 28, 4:14 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 31 min |
| Jun 28, 4:20 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 55 min |
| Jun 28, 4:29 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 46 min |
| Jun 28, 4:38 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 22 min |
| Jun 28, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 55 min |
| Jun 28, 4:52 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 38 min |
| Jun 28, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 46 min |
| Jun 28, 5:41 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 19 min |
| Jun 28, 6:07 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 38 min |
| Jun 28, 6:09 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 96 min |
| Jun 28, 6:30 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Worcester | 45 min |
| Jun 28, 7:52 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico, Worcester | 53 min |
| Jun 28, 8:06 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 39 min |
| Jun 30, 12:34 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 41 min |
| Jul 7, 12:27 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 63 min |
| Jul 7, 2:13 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 47 min |
| Jul 7, 3:46 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 44 min |
| Jul 7, 4:04 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 41 min |
| Jul 7, 5:04 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick | 41 min |
| Jul 10, 6:56 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 49 min |
| Jul 10, 7:28 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 47 min |
| Jul 10, 8:13 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 62 min |
| Jul 18, 4:03 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 42 min |
| Jul 18, 4:41 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, City of Baltimore | 49 min |
| Jul 19, 5:09 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 51 min |
| Jul 19, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard | 39 min |
| Jul 19, 5:59 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard | 61 min |
| Jul 19, 6:28 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 62 min |
| Jul 20, 12:28 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 47 min |
| Jul 20, 8:18 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 27 min |
| Jul 20, 8:49 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery | 41 min |
| Jul 20, 10:17 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 58 min |
| Jul 28, 10:31 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 44 min |
| Jul 28, 11:32 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 28 min |
| Jul 28, 11:54 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 51 min |
| Aug 1, 9:53 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 67 min |
| Aug 7, 9:03 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 42 min |
| Aug 9, 5:37 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 38 min |
| Aug 9, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 39 min |
| Aug 9, 7:14 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 46 min |
| Aug 9, 7:27 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 63 min |
| Aug 9, 8:32 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico, Worcester | 58 min |
| Aug 13, 5:51 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 54 min |
| Aug 13, 6:23 AM EDT | Severe Thunderstorm Warning | PHI | Cecil | 67 min |
| Aug 13, 7:57 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 48 min |
| Aug 21, 6:56 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 49 min |
| Aug 22, 12:06 AM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 24 min |
| Sep 2, 8:33 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 42 min |
| Sep 12, 12:46 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Howard, City of Baltimore | 44 min |
| Sep 12, 1:56 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 49 min |
| Sep 12, 2:27 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 48 min |
| Sep 12, 3:45 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery, Prince George's | 45 min |
| Sep 12, 4:19 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 41 min |
| Sep 12, 4:27 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick | 48 min |
| Sep 12, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Talbot | 39 min |
| Oct 7, 11:42 AM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 48 min |
| Oct 7, 1:05 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 25 min |
| Oct 7, 2:18 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 57 min |
| Nov 1, 3:31 AM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 44 min |
| Nov 1, 4:11 AM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 34 min |
| Nov 1, 4:27 AM EDT | Severe Thunderstorm Warning | LWX | Allegany | 63 min |
| Nov 1, 5:28 AM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 62 min |
| Nov 1, 6:16 AM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 44 min |
| Nov 1, 7:39 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 51 min |
| Nov 1, 8:27 AM EDT | Severe Thunderstorm Warning | PHI | Cecil | 63 min |
| Nov 1, 8:29 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 46 min |
| Nov 17, 10:25 PM EST | Severe Thunderstorm Warning | PBZ | Garrett | 65 min |
| Nov 17, 11:04 PM EST | Severe Thunderstorm Warning | PBZ | Garrett | 56 min |
| Nov 17, 11:25 PM EST | Severe Thunderstorm Warning | LWX | Allegany | 65 min |
| Nov 18, 12:16 AM EST | Severe Thunderstorm Warning | LWX | Allegany, Washington | 59 min |
| Nov 18, 2:28 AM EST | Severe Thunderstorm Warning | PHI | Cecil | 62 min |
| Nov 18, 2:46 AM EST | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 59 min |
| Nov 18, 3:39 AM EST | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 66 min |
| Dec 22, 3:26 AM EST | Severe Thunderstorm Warning | PBZ | Garrett | 49 min |
| Dec 22, 4:04 AM EST | Severe Thunderstorm Warning | LWX | Allegany | 41 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Charles County28
- Prince George's County26
- Washington County25
- Anne Arundel County21
- Baltimore County20
- Montgomery County20
- Cecil County20
- Frederick County17
- Saint Mary's County16
- Garrett County15
- Howard County15
- Calvert County15
- Allegany County14
- Carroll County13
- City of Baltimore11
- Caroline County11
- Queen Anne's County11
- Talbot County11
- Kent County10
- Harford County10
- Somerset County7
- Wicomico County5
- Worcester County5
- Dorchester County4
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20122014
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.