Alert archive / Pennsylvania / Mifflin County
Weather alerts in Mifflin County, Pennsylvania, 2019
141 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mifflin County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 141
- Warnings
- 30
- Watches
- 23
- Advisories
- 30
- Busiest month
- May37 alerts
- Busiest day
- May 29, 20199 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 reports fell inside a warning.
Mifflin County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 20 | 15 | 25% | 17 | 94% | 15 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 21 | 6 | 71% | 17 | 35% | 7 min |
| NWS State College, PA: severe thunderstorm warnings | 284 | 177 | 38% | 468 | 81% | 22 min |
| NWS State College, PA: flash flood warnings | 22 | 12 | 45% | 30 | 87% | 49 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 7, 4:04 AM EST | Winter Weather Advisory | CTP | 32 hr |
| Jan 11, 2:45 PM EST | Winter Weather Advisory | CTP | 52 hr |
| Jan 17, 4:17 AM EST | Winter Storm Watch | CTP | 33 hr |
| Jan 18, 4:45 AM EST | Winter Storm Warning | CTP | 53 hr |
| Jan 19, 6:24 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 19, 9:33 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 20, 4:06 AM EST | Wind Chill Advisory | CTP | 33 hr |
| Jan 22, 12:45 PM EST | Winter Weather Advisory | CTP | 30 hr |
| Jan 28, 1:27 PM EST | Winter Weather Advisory | CTP | 30 hr |
| Jan 29, 2:31 PM EST | Wind Chill Advisory | CTP | 63 hr |
| Jan 30, 9:13 AM EST | Snow Squall Warning | CTP | 47 min |
| Jan 30, 10:04 AM EST | Snow Squall Warning | CTP | 71 min |
| Feb 7, 1:37 AM EST | Dense Fog Advisory | CTP | 9 hr |
| Feb 10, 12:25 PM EST | Winter Weather Advisory | CTP | 64 hr |
| Feb 10, 3:55 PM EST | Winter Storm Watch | CTP | 21 hr |
| Feb 11, 3:50 AM EST | Winter Storm Warning | CTP | 38 hr |
| Feb 12, 4:16 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 12, 10:48 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 17, 4:05 AM EST | Winter Weather Advisory | CTP | 33 hr |
| Feb 18, 2:38 PM EST | Winter Storm Watch | CTP | 24 hr |
| Feb 19, 2:34 PM EST | Winter Storm Warning | CTP | 37 hr |
| Feb 20, 5:55 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 20, 6:32 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 22, 4:12 AM EST | High Wind Watch | CTP | 34 hr |
| Feb 23, 2:24 PM EST | High Wind Warning | CTP | 47 hr |
| Feb 25, 12:54 PM EST | Wind Advisory | CTP | 6 hr |
| Mar 1, 3:06 PM EST | Winter Storm Watch | CTP | 37 hr |
| Mar 2, 2:37 PM EST | Winter Weather Advisory | CTP | 34 hr |
| Mar 22, 4:19 AM EDT | Wind Advisory | CTP | 15 hr |
| Apr 2, 10:53 AM EDT | Fire Weather Watch | CTP | 16 hr |
| Apr 3, 3:07 AM EDT | Red Flag Warning | CTP | 18 hr |
| Apr 14, 6:46 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 14, 9:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 14, 10:58 PM EDT | Severe Thunderstorm Warning | CTP | 47 min |
| Apr 14, 11:34 PM EDT | Severe Thunderstorm Warning | CTP | 86 min |
| Apr 14, 11:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 15, 3:49 AM EDT | Wind Advisory | CTP | 16 hr |
| Apr 18, 2:01 PM EDT | Flash Flood Watch | CTP | 42 hr |
| Apr 19, 6:34 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 19, 7:35 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| Apr 19, 8:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 26, 1:33 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 27, 4:12 AM EDT | Wind Advisory | CTP | 11 hr |
| Apr 28, 10:57 AM EDT | Frost Advisory | CTP | 21 hr |
| May 3, 6:16 PM EDT | Special Weather Statement | CTP | 44 min |
| May 3, 6:23 PM EDT | Severe Thunderstorm Warning | CTP | 52 min |
| May 3, 6:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 3, 7:14 PM EDT | Special Weather Statement | CTP | 31 min |
| May 19, 1:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 19, 3:07 PM EDT | Severe Thunderstorm Warning | CTP | 38 min |
| May 19, 3:42 PM EDT | Severe Thunderstorm Warning | CTP | 48 min |
| May 19, 4:13 PM EDT | Severe Thunderstorm Warning | CTP | 47 min |
| May 19, 4:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| May 19, 5:45 PM EDT | Severe Thunderstorm Warning | CTP | 30 min |
| May 23, 3:59 AM EDT | Special Weather Statement | CTP | 46 min |
| May 23, 11:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| May 23, 7:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| May 23, 8:52 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| May 23, 9:20 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 23, 9:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 9:42 PM EDT | Special Weather Statement | CTP | 18 min |
| May 23, 10:05 PM EDT | Severe Thunderstorm Warning | CTP | 55 min |
| May 25, 8:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 26, 11:14 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 26, 12:40 PM EDT | Special Weather Statement | CTP | 35 min |
| May 28, 1:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 28, 1:13 PM EDT | Flash Flood Watch | CTP | 32 hr |
| May 28, 1:48 PM EDT | Tornado Watch | SPC | 8 hr |
| May 28, 4:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 4:49 PM EDT | Severe Thunderstorm Warning | CTP | 31 min |
| May 28, 8:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 29, 12:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 29, 1:10 PM EDT | Tornado Watch | SPC | 8 hr |
| May 29, 2:15 PM EDT | Special Weather Statement | CTP | 30 min |
| May 29, 2:47 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| May 29, 3:19 PM EDT | Severe Thunderstorm Warning | CTP | 26 min |
| May 29, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | 60 min |
| May 29, 3:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 29, 3:53 PM EDT | Severe Thunderstorm Warning | CTP | 32 min |
| May 30, 3:48 AM EDT | Flash Flood Watch | CTP | 18 hr |
| Jun 17, 3:30 AM EDT | Flash Flood Watch | CTP | 42 hr |
| Jun 19, 1:49 PM EDT | Flash Flood Watch | CTP | 10 hr |
| Jun 20, 4:17 AM EDT | Flash Flood Watch | CTP | 24 hr |
| Jun 20, 1:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 7:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 11:34 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 29, 12:08 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 29, 12:33 PM EDT | Special Weather Statement | CTP | 42 min |
| Jun 29, 12:45 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Jun 29, 1:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 2, 3:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 6, 1:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 5:11 PM EDT | Special Weather Statement | CTP | 49 min |
| Jul 7, 12:01 PM EDT | Flash Flood Watch | CTP | 22 hr |
| Jul 9, 3:48 AM EDT | Dense Fog Advisory | CTP | 5 hr |
| Jul 16, 3:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 1:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 3:02 PM EDT | Excessive Heat Warning | CTP | 3 days |
| Jul 18, 3:02 PM EDT | Heat Advisory | CTP | 53 hr |
| Jul 20, 4:22 AM EDT | Heat Advisory | CTP | 40 hr |
| Jul 30, 12:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 1:11 PM EDT | Special Weather Statement | CTP | 34 min |
| Jul 30, 2:43 PM EDT | Special Weather Statement | CTP | 47 min |
| Aug 2, 3:45 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 3, 12:40 AM EDT | Dense Fog Advisory | CTP | 8 hr |
| Aug 8, 12:37 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 15, 1:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 6:16 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Aug 15, 6:55 PM EDT | Severe Thunderstorm Warning | CTP | 65 min |
| Aug 15, 8:00 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 16, 1:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 6:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 7:45 PM EDT | Special Weather Statement | CTP | 30 min |
| Aug 18, 5:06 PM EDT | Severe Thunderstorm Warning | CTP | 24 min |
| Aug 18, 5:25 PM EDT | Severe Thunderstorm Warning | CTP | 50 min |
| Aug 20, 4:33 PM EDT | Special Weather Statement | CTP | 42 min |
| Aug 22, 2:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 4:43 PM EDT | Special Weather Statement | CTP | 62 min |
| Sep 2, 3:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 3, 5:27 AM EDT | Dense Fog Advisory | CTP | 4 hr |
| Sep 11, 3:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 8:38 PM EDT | Special Weather Statement | CTP | 37 min |
| Sep 12, 2:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Sep 28, 5:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 16, 4:40 AM EDT | Wind Advisory | CTP | 37 hr |
| Oct 18, 2:48 AM EDT | Freeze Warning | CTP | 29 hr |
| Oct 27, 7:37 AM EDT | Special Weather Statement | CTP | 23 min |
| Oct 27, 8:06 AM EDT | Special Weather Statement | CTP | 54 min |
| Oct 31, 4:32 AM EDT | Wind Advisory | CTP | 29 hr |
| Oct 31, 2:56 PM EDT | Tornado Watch | SPC | 10 hr |
| Oct 31, 6:55 PM EDT | Special Weather Statement | CTP | 50 min |
| Nov 26, 2:32 PM EST | Wind Advisory | CTP | 45 hr |
| Nov 29, 2:17 PM EST | Winter Weather Advisory | CTP | 71 hr |
| Nov 30, 7:29 PM EST | Winter Weather Advisory | CTP | 63 hr |
| Dec 1, 5:45 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 11, 8:27 PM EST | Special Weather Statement | CTP | 33 min |
| Dec 13, 2:26 AM EST | Winter Weather Advisory | CTP | 12 hr |
| Dec 14, 8:20 AM EST | Dense Fog Advisory | CTP | 3 hr |
| Dec 16, 4:24 AM EST | Winter Weather Advisory | CTP | 31 hr |
| Dec 18, 2:30 PM EST | Snow Squall Warning | CTP | 75 min |
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 | 20 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 40 |
| Special Weather Statement | 18 |
| Flooding | |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 2 |
| Winter | |
| Snow Squall Warning | 3 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 11 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.