Alert archive / Pennsylvania / Columbia County
Weather alerts in Columbia County, Pennsylvania, 2023
160 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Columbia County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 160
- Warnings
- 29
- Watches
- 24
- Advisories
- 40
- Busiest month
- July50 alerts
- Busiest day
- July 9, 202312 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 Columbia County in 2023 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Columbia County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 17 | 9 | 47% | 9 | 78% | 22 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 18 | 5 | 72% | 15 | 40% | 3 min |
| NWS State College, PA: severe thunderstorm warnings | 186 | 136 | 27% | 381 | 83% | 19 min |
| NWS State College, PA: flash flood warnings | 8 | 3 | 63% | 8 | 63% | 42 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 3, 2:21 AM EST | Dense Fog Advisory | CTP | 7 hr |
| Jan 3, 11:19 PM EST | Dense Fog Advisory | CTP | 12 hr |
| Jan 21, 2:13 PM EST | Winter Weather Advisory | CTP | 43 hr |
| Jan 24, 4:16 AM EST | Winter Storm Watch | CTP | 23 hr |
| Jan 24, 4:16 AM EST | Winter Weather Advisory | CTP | 42 hr |
| Jan 27, 4:39 AM EST | Special Weather Statement | CTP | 66 min |
| Feb 21, 2:37 PM EST | Special Weather Statement | CTP | 23 min |
| Feb 21, 3:45 PM EST | Winter Weather Advisory | CTP | 28 hr |
| Feb 25, 8:16 AM EST | Special Weather Statement | CTP | 44 min |
| Feb 26, 3:45 PM EST | Winter Weather Advisory | CTP | 43 hr |
| Mar 2, 1:39 PM EST | Winter Weather Advisory | CTP | 43 hr |
| Mar 6, 3:44 AM EST | Winter Weather Advisory | CTP | 25 hr |
| Mar 6, 6:51 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 9, 10:33 AM EST | Winter Weather Advisory | CTP | 40 hr |
| Mar 13, 4:22 AM EDT | Winter Weather Advisory | CTP | 38 hr |
| Mar 31, 3:22 PM EDT | Wind Advisory | CTP | 35 hr |
| Apr 1, 2:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Apr 1, 2:27 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 11, 3:49 PM EDT | Fire Weather Watch | CTP | 17 hr |
| Apr 12, 8:54 AM EDT | Red Flag Warning | CTP | 11 hr |
| Apr 16, 7:41 AM EDT | Dense Fog Advisory | CTP | 2 hr |
| Apr 17, 1:15 AM EDT | Special Weather Statement | CTP | 60 min |
| Apr 22, 2:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Apr 22, 3:08 PM EDT | Severe Thunderstorm Warning | CTP | 37 min |
| Apr 22, 3:43 PM EDT | Special Weather Statement | CTP | 47 min |
| Apr 23, 12:52 PM EDT | Frost Advisory | CTP | 19 hr |
| Apr 24, 2:09 PM EDT | Frost Advisory | CTP | 19 hr |
| Apr 30, 8:31 AM EDT | Flood Watch | CTP | 11 hr |
| Apr 30, 7:20 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| May 16, 3:09 PM EDT | Freeze Watch | CTP | 20 hr |
| May 17, 11:05 AM EDT | Freeze Warning | CTP | 21 hr |
| Jun 3, 1:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 3:02 PM EDT | Special Weather Statement | BGM | 13 min |
| Jun 3, 3:06 PM EDT | Special Weather Statement | CTP | 24 min |
| Jun 3, 5:48 PM EDT | Special Weather Statement | CTP | 27 min |
| Jun 3, 6:13 PM EDT | Special Weather Statement | CTP | 32 min |
| Jun 5, 3:30 PM EDT | Fire Weather Watch | CTP | 17 hr |
| Jun 6, 8:26 AM EDT | Red Flag Warning | CTP | 12 hr |
| Jun 6, 1:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 6:32 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 25, 3:45 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 26, 3:49 AM EDT | Flood Watch | CTP | 19 hr |
| Jun 26, 8:37 AM EDT | Severe Thunderstorm Warning | CTP | 38 min |
| Jun 26, 9:14 AM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| Jun 26, 9:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 26, 12:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jun 26, 1:23 PM EDT | Special Weather Statement | CTP | 37 min |
| Jun 26, 1:47 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Jun 26, 2:07 PM EDT | Areal Flood Advisory | CTP | 61 min |
| Jun 26, 8:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 27, 2:41 PM EDT | Special Weather Statement | CTP | 64 min |
| Jul 1, 1:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 3:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 2, 4:50 PM EDT | Tornado Warning | CTP | 25 min |
| Jul 2, 5:15 PM EDT | Special Weather Statement | CTP | 30 min |
| Jul 2, 5:52 PM EDT | Special Weather Statement | CTP | 38 min |
| Jul 3, 2:55 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 4:35 PM EDT | Special Weather Statement | CTP | 25 min |
| Jul 8, 3:12 PM EDT | Flood Watch | CTP | 26 hr |
| Jul 9, 5:08 AM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 9, 8:28 AM EDT | Special Weather Statement | CTP | 32 min |
| Jul 9, 8:44 AM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Jul 9, 8:54 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 9, 9:22 AM EDT | Flash Flood Warning | CTP | 4 hr |
| Jul 9, 10:28 AM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 9, 11:06 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 9, 11:08 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 9, 11:56 AM EDT | Flash Flood Warning | CTP | 4 hr |
| Jul 9, 1:16 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 9, 1:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 9, 3:43 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 13, 2:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 2:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 5:50 AM EDT | Dense Fog Advisory | CTP | 3 hr |
| Jul 15, 6:44 PM EDT | Flood Watch | CTP | 23 hr |
| Jul 15, 7:06 PM EDT | Special Weather Statement | CTP | 24 min |
| Jul 15, 7:30 PM EDT | Special Weather Statement | CTP | 30 min |
| Jul 15, 7:55 PM EDT | Special Weather Statement | CTP | 35 min |
| Jul 15, 8:15 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Jul 15, 9:50 PM EDT | Special Weather Statement | CTP | 40 min |
| Jul 15, 10:21 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 16, 1:06 AM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 17, 8:27 PM EDT | Special Weather Statement | CTP | 33 min |
| Jul 17, 8:39 PM EDT | Areal Flood Advisory | CTP | 81 min |
| Jul 19, 4:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 20, 6:19 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 20, 10:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 20, 11:12 PM EDT | Severe Thunderstorm Warning | CTP | 48 min |
| Jul 24, 8:46 PM EDT | Special Weather Statement | CTP | 44 min |
| Jul 24, 9:00 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Jul 24, 10:38 PM EDT | Special Weather Statement | CTP | 22 min |
| Jul 24, 11:35 PM EDT | Areal Flood Advisory | CTP | 70 min |
| Jul 25, 10:58 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 5:36 AM EDT | Heat Advisory | CTP | 62 hr |
| Jul 27, 11:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 4:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 27, 5:06 PM EDT | Special Weather Statement | CTP | 54 min |
| Jul 27, 5:59 PM EDT | Severe Thunderstorm Warning | CTP | 76 min |
| Jul 27, 6:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 29, 1:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 29, 4:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 4, 11:21 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 4, 12:10 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Aug 4, 2:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 4, 3:11 PM EDT | Severe Thunderstorm Warning | CTP | 49 min |
| Aug 4, 4:06 PM EDT | Severe Thunderstorm Warning | CTP | 17 min |
| Aug 4, 6:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 1:20 PM EDT | Tornado Watch | SPC | 11 hr |
| Aug 7, 3:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 7, 4:39 PM EDT | Severe Thunderstorm Warning | CTP | 51 min |
| Aug 7, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 7, 5:33 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Aug 7, 5:39 PM EDT | Severe Thunderstorm Warning | CTP | 51 min |
| Aug 9, 5:23 PM EDT | Special Weather Statement | CTP | 37 min |
| Aug 12, 12:50 PM EDT | Tornado Watch | SPC | 8 hr |
| Aug 12, 3:19 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| Aug 12, 4:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 15, 7:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 15, 7:09 PM EDT | Special Weather Statement | CTP | 36 min |
| Aug 17, 11:04 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 18, 12:52 AM EDT | Special Weather Statement | CTP | 53 min |
| Aug 18, 1:41 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 18, 1:48 AM EDT | Special Weather Statement | CTP | 57 min |
| Aug 18, 6:23 AM EDT | Areal Flood Advisory | CTP | 4 hr |
| Aug 29, 1:57 PM EDT | Flood Watch | CTP | 14 hr |
| Aug 30, 3:04 AM EDT | Special Weather Statement | CTP | 56 min |
| Aug 30, 3:58 AM EDT | Special Weather Statement | CTP | 47 min |
| Sep 7, 11:58 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 7, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 7, 3:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 7, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Sep 7, 3:37 PM EDT | Special Weather Statement | CTP | 38 min |
| Sep 7, 3:58 PM EDT | Severe Thunderstorm Warning | CTP | 47 min |
| Sep 7, 4:41 PM EDT | Severe Thunderstorm Warning | CTP | 49 min |
| Sep 8, 2:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 8, 3:11 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 9, 2:08 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 9, 4:23 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 9, 4:24 PM EDT | Special Weather Statement | CTP | 36 min |
| Sep 9, 6:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 9, 7:16 PM EDT | Areal Flood Advisory | CTP | 119 min |
| Sep 9, 7:49 PM EDT | Areal Flood Warning | CTP | 116 min |
| Sep 9, 8:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 12, 3:19 PM EDT | Flood Watch | CTP | 12 hr |
| Oct 1, 2:31 AM EDT | Dense Fog Advisory | CTP | 7 hr |
| Oct 3, 3:46 AM EDT | Dense Fog Advisory | CTP | 6 hr |
| Oct 4, 2:53 AM EDT | Dense Fog Advisory | CTP | 7 hr |
| Oct 23, 1:30 PM EDT | Frost Advisory | CTP | 20 hr |
| Oct 30, 3:02 AM EDT | Freeze Warning | CTP | 30 hr |
| Oct 31, 3:36 AM EDT | Freeze Watch | CTP | 23 hr |
| Nov 1, 2:18 AM EDT | Freeze Warning | CTP | 32 hr |
| Dec 2, 8:05 AM EST | Dense Fog Advisory | CTP | 115 min |
| Dec 8, 2:50 PM EST | Flood Watch | CTP | 58 hr |
| Dec 10, 11:07 AM EST | Winter Weather Advisory | CTP | 18 hr |
| Dec 16, 1:39 PM EST | Flood Watch | CTP | 46 hr |
| Dec 18, 12:37 AM EST | Areal Flood Advisory | CTP | 6 hr |
| Dec 18, 2:21 AM EST | Areal Flood Warning | CTP | 14 hr |
| Dec 19, 3:27 AM EST | River Flood Warning | CTP | 11 hr |
| Dec 19, 4:36 AM EST | River Flood Warning | CTP | 23 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 | 17 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 36 |
| Special Weather Statement | 31 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 2 |
| River Flood Warning | 2 |
| Flood Watch | 8 |
| Areal Flood Advisory | 18 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.