Alert archive / Pennsylvania / Centre County
Weather alerts in Centre County, Pennsylvania, 2020
125 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Centre County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 125
- Warnings
- 29
- Watches
- 15
- Advisories
- 23
- Busiest month
- June28 alerts
- Busiest day
- January 8, 202011 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Centre County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 13 | 19% | 22 | 55% | 18 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 3 | 0 | 100% | 0 | ||
| NWS State College, PA: severe thunderstorm warnings | 163 | 128 | 21% | 422 | 76% | 23 min |
| NWS State College, PA: flash flood warnings | 10 | 6 | 40% | 25 | 92% | 57 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, 7:12 PM EST | Special Weather Statement | CTP | 33 min |
| Jan 8, 5:23 AM EST | Snow Squall Warning | CTP | 67 min |
| Jan 8, 5:52 AM EST | Snow Squall Warning | CTP | 53 min |
| Jan 8, 6:25 AM EST | Snow Squall Warning | CTP | 50 min |
| Jan 8, 7:12 AM EST | Snow Squall Warning | CTP | 48 min |
| Jan 8, 7:41 AM EST | Snow Squall Warning | CTP | 34 min |
| Jan 8, 8:06 AM EST | Special Weather Statement | CTP | 54 min |
| Jan 8, 8:27 AM EST | Snow Squall Warning | CTP | 48 min |
| Jan 8, 9:04 AM EST | Special Weather Statement | CTP | 41 min |
| Jan 8, 9:28 AM EST | Snow Squall Warning | CTP | 22 min |
| Jan 8, 10:09 AM EST | Special Weather Statement | CTP | 36 min |
| Jan 8, 10:26 AM EST | Special Weather Statement | CTP | 49 min |
| Jan 10, 7:58 AM EST | Winter Weather Advisory | CTP | 4 hr |
| Jan 11, 4:07 AM EST | High Wind Watch | CTP | 10 hr |
| Jan 11, 4:07 AM EST | Wind Advisory | CTP | 30 hr |
| Jan 15, 2:23 PM EST | Wind Advisory | CTP | 29 hr |
| Jan 16, 4:30 PM EST | Special Weather Statement | CTP | 45 min |
| Jan 17, 3:01 PM EST | Winter Weather Advisory | CTP | 30 hr |
| Jan 18, 11:53 AM EST | Special Weather Statement | CTP | 82 min |
| Feb 5, 3:41 AM EST | Winter Weather Advisory | CTP | 30 hr |
| Feb 6, 1:27 PM EST | Winter Weather Advisory | CTP | 25 hr |
| Feb 12, 4:11 AM EST | Winter Weather Advisory | CTP | 30 hr |
| Feb 13, 10:37 PM EST | Special Weather Statement | CTP | 53 min |
| Feb 13, 11:38 PM EST | Special Weather Statement | CTP | 52 min |
| Feb 26, 3:40 AM EST | Wind Advisory | CTP | 40 hr |
| Feb 26, 2:49 PM EST | Mesoscale Discussion | SPC | 116 min |
| Feb 27, 4:36 PM EST | Special Weather Statement | CTP | 54 min |
| Feb 27, 5:29 PM EST | Special Weather Statement | CTP | 2 hr |
| Feb 27, 10:07 PM EST | Special Weather Statement | CTP | 68 min |
| Feb 27, 11:26 PM EST | Special Weather Statement | CTP | 2 hr |
| Feb 29, 8:59 AM EST | Special Weather Statement | CTP | 61 min |
| Feb 29, 10:05 AM EST | Special Weather Statement | CTP | 55 min |
| Mar 3, 4:27 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 6:17 PM EST | Special Weather Statement | CTP | 43 min |
| Mar 3, 9:42 PM EST | Special Weather Statement | CTP | 33 min |
| Mar 3, 10:14 PM EST | Special Weather Statement | CTP | 46 min |
| Mar 20, 3:01 PM EDT | Special Weather Statement | CTP | 44 min |
| Mar 20, 3:43 PM EDT | Special Weather Statement | CTP | 47 min |
| Mar 23, 1:33 PM EDT | Special Weather Statement | CTP | 72 min |
| Mar 28, 6:21 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Mar 28, 10:00 PM EDT | Flash Flood Watch | CTP | 6 hr |
| Mar 30, 12:39 AM EDT | Dense Fog Advisory | CTP | 7 hr |
| Apr 7, 10:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 9, 10:29 AM EDT | Special Weather Statement | CTP | 46 min |
| Apr 9, 6:58 PM EDT | Special Weather Statement | CTP | 92 min |
| Apr 12, 12:43 PM EDT | Wind Advisory | CTP | 31 hr |
| Apr 13, 11:33 AM EDT | Tornado Watch | SPC | 5 hr |
| Apr 13, 12:45 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Apr 13, 1:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 13, 1:25 PM EDT | Severe Thunderstorm Warning | CTP | 50 min |
| Apr 13, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | 41 min |
| Apr 15, 10:01 PM EDT | Special Weather Statement | CTP | 44 min |
| Apr 17, 6:55 PM EDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 29, 3:33 AM EDT | Flood Watch | CTP | 50 hr |
| Apr 30, 10:59 AM EDT | Areal Flood Advisory | CTP | 6 hr |
| May 7, 1:44 PM EDT | Freeze Warning | CTP | 44 hr |
| May 9, 5:04 AM EDT | Freeze Warning | CTP | 27 hr |
| May 10, 1:35 PM EDT | Freeze Watch | CTP | 13 hr |
| May 11, 2:58 AM EDT | Freeze Warning | CTP | 30 hr |
| May 11, 3:09 PM EDT | Freeze Watch | CTP | 19 hr |
| May 12, 10:20 AM EDT | Freeze Warning | CTP | 22 hr |
| May 20, 1:14 PM EDT | Frost Advisory | CTP | 18 hr |
| May 28, 7:00 PM EDT | Special Weather Statement | CTP | 60 min |
| May 28, 9:02 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 3, 8:32 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 3, 9:52 AM EDT | Severe Thunderstorm Warning | CTP | 38 min |
| Jun 3, 10:08 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 3, 3:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 3:21 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Jun 3, 3:52 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 3, 4:11 PM EDT | Severe Thunderstorm Warning | CTP | 64 min |
| Jun 3, 4:49 PM EDT | Severe Thunderstorm Warning | CTP | 41 min |
| Jun 4, 2:29 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 4, 3:00 PM EDT | Special Weather Statement | CTP | 30 min |
| Jun 4, 3:52 PM EDT | Special Weather Statement | CTP | 53 min |
| Jun 4, 4:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 4, 4:43 PM EDT | Special Weather Statement | CTP | 62 min |
| Jun 4, 5:53 PM EDT | Severe Thunderstorm Warning | CTP | 37 min |
| Jun 4, 6:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 4, 7:13 PM EDT | Severe Thunderstorm Warning | CTP | 62 min |
| Jun 10, 12:34 PM EDT | Special Weather Statement | CTP | 26 min |
| Jun 10, 1:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 2:49 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| Jun 10, 4:12 PM EDT | Severe Thunderstorm Warning | CTP | 36 min |
| Jun 11, 2:37 AM EDT | Special Weather Statement | CTP | 53 min |
| Jun 19, 5:54 PM EDT | Special Weather Statement | CTP | 66 min |
| Jun 22, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 22, 4:13 PM EDT | Special Weather Statement | CTP | 47 min |
| Jun 22, 5:02 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Jun 22, 5:22 PM EDT | Special Weather Statement | CTP | 38 min |
| Jun 25, 7:13 PM EDT | Severe Thunderstorm Warning | CTP | 47 min |
| Jun 25, 7:30 PM EDT | Special Weather Statement | CTP | 30 min |
| Jul 8, 9:21 PM EDT | Areal Flood Advisory | CTP | 114 min |
| Jul 19, 6:22 PM EDT | Special Weather Statement | CTP | 23 min |
| Jul 19, 6:46 PM EDT | Special Weather Statement | CTP | 44 min |
| Jul 19, 7:20 PM EDT | Severe Thunderstorm Warning | CTP | 27 min |
| Jul 22, 12:01 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 7, 10:06 AM EDT | Flash Flood Watch | CTP | 9 hr |
| Aug 7, 11:04 AM EDT | Areal Flood Advisory | CTP | 2 hr |
| Aug 24, 12:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 24, 1:51 PM EDT | Special Weather Statement | CTP | 24 min |
| Aug 24, 10:13 PM EDT | Special Weather Statement | CTP | 32 min |
| Aug 25, 12:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 25, 1:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 27, 4:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 27, 5:32 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 27, 6:15 PM EDT | Severe Thunderstorm Warning | CTP | 75 min |
| Aug 27, 6:38 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Aug 27, 6:40 PM EDT | Special Weather Statement | CTP | 35 min |
| Aug 28, 9:55 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 28, 12:40 PM EDT | Special Weather Statement | CTP | 65 min |
| Aug 29, 3:38 PM EDT | Special Weather Statement | CTP | 52 min |
| Sep 19, 12:53 PM EDT | Frost Advisory | CTP | 20 hr |
| Sep 20, 11:59 AM EDT | Frost Advisory | CTP | 21 hr |
| Oct 21, 4:01 AM EDT | Dense Fog Advisory | CTP | 5 hr |
| Nov 1, 9:59 PM EST | Wind Advisory | CTP | 14 hr |
| Nov 14, 2:11 PM EST | Wind Advisory | CTP | 32 hr |
| Dec 14, 4:44 AM EST | Winter Storm Watch | CTP | 34 hr |
| Dec 15, 4:30 AM EST | Winter Storm Warning | CTP | 51 hr |
| Dec 16, 1:57 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 20, 8:49 AM EST | Special Weather Statement | CTP | 56 min |
| Dec 22, 3:09 PM EST | Flood Watch | CTP | 69 hr |
| Dec 24, 4:15 PM EST | Areal Flood Advisory | CTP | 4 hr |
| Dec 24, 5:58 PM EST | River Flood Warning | CTP | 18 hr |
| Dec 24, 7:59 PM EST | Areal Flood Advisory | CTP | 5 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 | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 42 |
| Flooding | |
| River Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Flood Watch | 2 |
| Areal Flood Advisory | 7 |
| Winter | |
| Snow Squall Warning | 7 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 5 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
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.