Alert archive / Pennsylvania / Dauphin County
Weather alerts in Dauphin County, Pennsylvania, 2018
179 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Dauphin County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 179
- Warnings
- 47
- Watches
- 27
- Advisories
- 51
- Busiest month
- July36 alerts
- Busiest day
- May 15, 20189 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Dauphin County in 2018 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Dauphin County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 1 | 0% | |
| Severe thunderstorm warnings | 11 | 7 | 36% | 13 | 54% | 20 min |
| Flash flood warnings | 6 | 5 | 17% | 6 | 83% | 113 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 22 | 5 | 77% | 10 | 50% | 7 min |
| NWS State College, PA: severe thunderstorm warnings | 122 | 81 | 34% | 244 | 80% | 30 min |
| NWS State College, PA: flash flood warnings | 57 | 36 | 37% | 89 | 88% | 96 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, 3:46 AM EST | Wind Chill Advisory | CTP | 3 days |
| Jan 7, 2:38 PM EST | Winter Weather Advisory | CTP | 40 hr |
| Jan 12, 4:46 AM EST | Winter Weather Advisory | CTP | 29 hr |
| Jan 13, 12:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 14, 7:48 AM EST | Flood Watch | CTP | 23 hr |
| Jan 15, 2:22 PM EST | Winter Weather Advisory | CTP | 41 hr |
| Jan 23, 6:34 AM EST | Areal Flood Advisory | CTP | 3 hr |
| Jan 23, 10:38 AM EST | Areal Flood Advisory | CTP | 3 hr |
| Jan 23, 2:17 PM EST | River Flood Warning | CTP | 24 hr |
| Feb 3, 2:44 PM EST | Winter Weather Advisory | CTP | 42 hr |
| Feb 4, 6:32 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 3:57 AM EST | Winter Weather Advisory | CTP | 38 hr |
| Feb 7, 5:28 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 11, 12:01 AM EST | Dense Fog Advisory | CTP | 10 hr |
| Feb 11, 6:40 PM EST | Dense Fog Advisory | CTP | 5 hr |
| Feb 15, 9:26 PM EST | Areal Flood Advisory | CTP | 3 hr |
| Feb 16, 7:14 PM EST | Winter Weather Advisory | CTP | 33 hr |
| Feb 17, 1:51 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 17, 5:40 PM EST | Special Weather Statement | CTP | 50 min |
| Feb 17, 6:33 PM EST | Winter Storm Warning | CTP | 9 hr |
| Feb 20, 12:33 AM EST | Dense Fog Advisory | CTP | 9 hr |
| Feb 22, 11:29 AM EST | Flood Watch | CTP | 68 hr |
| Feb 24, 4:12 AM EST | Dense Fog Advisory | CTP | 6 hr |
| Mar 1, 3:26 AM EST | High Wind Watch | CTP | 13 hr |
| Mar 1, 4:03 PM EST | High Wind Warning | CTP | 30 hr |
| Mar 1, 4:03 PM EST | Wind Advisory | CTP | 33 hr |
| Mar 5, 2:17 PM EST | Winter Storm Watch | CTP | 22 hr |
| Mar 6, 11:59 AM EST | Winter Storm Warning | CTP | 27 hr |
| Mar 19, 3:32 PM EDT | Winter Storm Watch | CTP | 13 hr |
| Mar 20, 4:36 AM EDT | Winter Storm Warning | CTP | 39 hr |
| Mar 25, 11:00 AM EDT | Special Weather Statement | CTP | 75 min |
| Mar 29, 2:28 AM EDT | Dense Fog Advisory | CTP | 8 hr |
| Apr 1, 4:17 AM EDT | Winter Weather Advisory | CTP | 29 hr |
| Apr 2, 3:47 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 3, 3:25 PM EDT | Wind Advisory | CTP | 12 hr |
| Apr 4, 3:36 AM EDT | High Wind Warning | CTP | 16 hr |
| Apr 16, 1:44 AM EDT | Flash Flood Watch | CTP | 10 hr |
| Apr 16, 6:48 AM EDT | Areal Flood Advisory | CTP | 4 hr |
| Apr 17, 1:07 PM EDT | Freeze Warning | CTP | 19 hr |
| Apr 17, 6:02 PM EDT | Special Weather Statement | CTP | 58 min |
| Apr 19, 2:22 PM EDT | Freeze Warning | CTP | 18 hr |
| Apr 20, 4:27 AM EDT | Freeze Watch | CTP | 10 hr |
| Apr 20, 2:38 PM EDT | Freeze Warning | CTP | 17 hr |
| May 2, 4:45 AM EDT | Red Flag Warning | CTP | 16 hr |
| May 3, 6:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 4:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| May 10, 4:56 PM EDT | Severe Thunderstorm Warning | CTP | 64 min |
| May 10, 6:14 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| May 12, 3:59 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 12, 4:58 PM EDT | Tornado Watch | SPC | 5 hr |
| May 12, 6:16 PM EDT | Special Weather Statement | CTP | 29 min |
| May 12, 7:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 15, 3:47 AM EDT | Flash Flood Watch | CTP | 15 hr |
| May 15, 11:43 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 15, 12:26 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 15, 2:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 3:14 PM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| May 15, 3:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 15, 3:45 PM EDT | Severe Thunderstorm Warning | CTP | 60 min |
| May 15, 4:14 PM EDT | Tornado Warning | CTP | 31 min |
| May 15, 4:41 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| May 16, 1:26 PM EDT | Flood Watch | CTP | 72 hr |
| May 30, 4:37 AM EDT | Dense Fog Advisory | CTP | 4 hr |
| May 31, 10:14 PM EDT | Areal Flood Advisory | CTP | 88 min |
| Jun 5, 3:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 11:57 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 13, 8:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 17, 2:14 PM EDT | Heat Advisory | CTP | 30 hr |
| Jun 27, 7:37 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 11:03 PM EDT | Special Weather Statement | CTP | 42 min |
| Jun 27, 11:57 PM EDT | Special Weather Statement | CTP | 18 min |
| Jun 28, 12:28 AM EDT | Special Weather Statement | CTP | 47 min |
| Jun 28, 12:54 AM EDT | Severe Thunderstorm Warning | CTP | 50 min |
| Jun 28, 1:14 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 28, 10:20 AM EDT | River Flood Warning | CTP | 26 hr |
| Jun 29, 2:28 PM EDT | Heat Advisory | CTP | 4 days |
| Jul 2, 2:48 PM EDT | Excessive Heat Warning | CTP | 29 hr |
| Jul 4, 2:19 PM EDT | Heat Advisory | CTP | 4 hr |
| Jul 4, 4:40 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 4, 7:50 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 5, 4:17 AM EDT | Flash Flood Watch | CTP | 30 hr |
| Jul 17, 12:55 PM EDT | Special Weather Statement | CTP | 35 min |
| Jul 17, 1:19 PM EDT | Areal Flood Advisory | CTP | 116 min |
| Jul 21, 4:40 AM EDT | Flash Flood Watch | CTP | 23 hr |
| Jul 22, 11:43 AM EDT | Flash Flood Watch | CTP | 11 hr |
| Jul 23, 12:13 AM EDT | Areal Flood Advisory | CTP | 6 hr |
| Jul 23, 3:43 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 23, 3:59 AM EDT | Flash Flood Watch | CTP | 4 days |
| Jul 23, 4:32 AM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 23, 6:24 AM EDT | River Flood Warning | CTP | 5 days |
| Jul 23, 8:06 AM EDT | Areal Flood Warning | CTP | 6 hr |
| Jul 23, 11:02 AM EDT | River Flood Warning | CTP | 4 days |
| Jul 23, 1:47 PM EDT | Areal Flood Warning | CTP | 9 hr |
| Jul 23, 2:40 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 10:04 PM EDT | Flash Flood Warning | CTP | 5 hr |
| Jul 24, 2:56 AM EDT | Areal Flood Warning | CTP | 6 hr |
| Jul 24, 3:43 AM EDT | Areal Flood Advisory | CTP | 4 hr |
| Jul 24, 9:06 AM EDT | Areal Flood Warning | CTP | 9 hr |
| Jul 24, 10:54 AM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 24, 4:25 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 24, 5:58 PM EDT | Areal Flood Warning | CTP | 48 hr |
| Jul 24, 10:19 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| Jul 24, 11:02 PM EDT | Severe Thunderstorm Warning | CTP | 58 min |
| Jul 25, 12:52 AM EDT | Flash Flood Warning | CTP | 4 hr |
| Jul 25, 10:20 AM EDT | River Flood Warning | CTP | 58 hr |
| Jul 25, 10:20 AM EDT | River Flood Warning | CTP | 72 hr |
| Jul 25, 5:00 PM EDT | Special Weather Statement | CTP | 30 min |
| Jul 25, 5:27 PM EDT | Flash Flood Warning | CTP | 4 hr |
| Jul 27, 9:36 AM EDT | Flash Flood Watch | CTP | 13 hr |
| Jul 27, 12:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 27, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 27, 4:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 1, 4:06 AM EDT | Flash Flood Watch | CTP | 3 days |
| Aug 1, 3:15 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 1, 8:14 PM EDT | Special Weather Statement | CTP | 31 min |
| Aug 1, 9:00 PM EDT | Special Weather Statement | CTP | 45 min |
| Aug 3, 10:30 PM EDT | Areal Flood Advisory | CTP | 60 min |
| Aug 3, 11:28 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 5, 2:37 PM EDT | Heat Advisory | CTP | 28 hr |
| Aug 7, 2:54 PM EDT | Special Weather Statement | CTP | 51 min |
| Aug 7, 3:07 PM EDT | Severe Thunderstorm Warning | CTP | 13 min |
| Aug 7, 4:03 PM EDT | Special Weather Statement | CTP | 57 min |
| Aug 8, 3:55 PM EDT | Special Weather Statement | CTP | 50 min |
| Aug 10, 6:23 PM EDT | Special Weather Statement | CTP | 37 min |
| Aug 11, 10:54 AM EDT | Flash Flood Watch | CTP | 8 hr |
| Aug 13, 1:46 AM EDT | Flash Flood Watch | CTP | 43 hr |
| Aug 13, 2:24 AM EDT | Areal Flood Advisory | CTP | 4 hr |
| Aug 13, 4:26 AM EDT | Flash Flood Warning | CTP | 6 hr |
| Aug 13, 6:38 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 13, 9:16 AM EDT | River Flood Warning | CTP | 37 hr |
| Aug 13, 10:39 AM EDT | Areal Flood Warning | CTP | 6 hr |
| Aug 13, 4:32 PM EDT | Areal Flood Warning | CTP | 3 hr |
| Aug 13, 7:29 PM EDT | Areal Flood Warning | CTP | 3 hr |
| Aug 14, 3:57 AM EDT | River Flood Warning | CTP | 66 hr |
| Aug 17, 2:42 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 17, 4:47 PM EDT | Special Weather Statement | CTP | 43 min |
| Aug 17, 5:21 PM EDT | Areal Flood Advisory | CTP | 114 min |
| Aug 17, 5:49 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 17, 6:22 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Aug 21, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 21, 4:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 7:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 27, 4:25 AM EDT | Heat Advisory | CTP | 64 hr |
| Sep 6, 4:01 PM EDT | Special Weather Statement | CTP | 44 min |
| Sep 6, 4:37 PM EDT | Special Weather Statement | CTP | 53 min |
| Sep 6, 4:45 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Sep 8, 3:33 AM EDT | Flood Watch | CTP | 64 hr |
| Sep 10, 2:41 AM EDT | Areal Flood Warning | CTP | 9 hr |
| Sep 11, 5:12 AM EDT | River Flood Warning | CTP | 49 hr |
| Sep 16, 7:11 AM EDT | Dense Fog Advisory | CTP | 3 hr |
| Sep 17, 4:51 AM EDT | Flash Flood Watch | CTP | 31 hr |
| Sep 17, 8:09 PM EDT | Special Weather Statement | CTP | 66 min |
| Sep 26, 3:40 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 26, 4:51 PM EDT | Special Weather Statement | CTP | 24 min |
| Sep 26, 5:02 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 26, 5:13 PM EDT | Special Weather Statement | CTP | 62 min |
| Oct 2, 2:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 2, 2:55 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 2, 4:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 2, 7:24 PM EDT | Mesoscale Discussion | SPC | 81 min |
| Oct 2, 8:38 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Oct 17, 2:28 PM EDT | Freeze Watch | CTP | 13 hr |
| Oct 18, 3:14 AM EDT | Frost Advisory | CTP | 30 hr |
| Nov 2, 6:19 AM EDT | Special Weather Statement | CTP | 26 min |
| Nov 2, 6:51 AM EDT | Special Weather Statement | CTP | 24 min |
| Nov 2, 7:17 AM EDT | Special Weather Statement | CTP | 28 min |
| Nov 2, 8:40 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Nov 2, 11:39 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Nov 14, 3:40 PM EST | Winter Storm Warning | CTP | 38 hr |
| Nov 15, 9:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 15, 4:39 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 16, 3:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 23, 11:02 AM EST | Winter Weather Advisory | CTP | 27 hr |
| Nov 24, 10:08 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Nov 24, 7:11 PM EST | Areal Flood Advisory | CTP | 3 hr |
| Nov 27, 3:14 PM EST | Wind Advisory | CTP | 25 hr |
| Dec 2, 7:37 PM EST | Dense Fog Advisory | CTP | 8 hr |
| Dec 19, 3:49 AM EST | Flood Watch | CTP | 69 hr |
| Dec 21, 7:59 AM EST | Areal Flood Advisory | CTP | 6 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 archive20172019
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.