Alert archive / Pennsylvania / Clearfield County
Weather alerts in Clearfield County, Pennsylvania, 2011
167 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clearfield County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 167
- Warnings
- 27
- Watches
- 25
- Advisories
- 45
- Busiest month
- April34 alerts
- Busiest day
- April 26, 201110 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clearfield County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 18 | 9 | 50% | 6 | 67% | 24 min |
| Flash flood warnings | 4 | 3 | 25% | 2 | 50% | 43 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 40 | 7 | 83% | 23 | 35% | 22 min |
| NWS State College, PA: severe thunderstorm warnings | 243 | 127 | 48% | 332 | 83% | 28 min |
| NWS State College, PA: flash flood warnings | 79 | 46 | 42% | 114 | 76% | 101 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, 8:02 AM EST | Special Weather Statement | CTP | 28 min |
| Jan 7, 8:30 AM EST | Special Weather Statement | CTP | 60 min |
| Jan 7, 2:33 PM EST | Winter Weather Advisory | CTP | 37 hr |
| Jan 10, 3:14 PM EST | Winter Weather Advisory | CTP | 3 days |
| Jan 12, 2:19 AM EST | Special Weather Statement | CTP | 116 min |
| Jan 15, 10:42 AM EST | Special Weather Statement | CTP | 48 min |
| Jan 20, 4:13 AM EST | Winter Weather Advisory | CTP | 40 hr |
| Jan 21, 9:27 AM EST | Special Weather Statement | CTP | 48 min |
| Jan 30, 12:16 AM EST | Special Weather Statement | CTP | 119 min |
| Jan 30, 7:18 PM EST | Winter Storm Watch | CTP | 20 hr |
| Jan 31, 3:07 PM EST | Winter Storm Warning | CTP | 40 hr |
| Feb 1, 2:42 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 1, 8:39 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 2, 5:38 PM EST | Special Weather Statement | CTP | 112 min |
| Feb 4, 2:47 PM EST | Winter Weather Advisory | CTP | 32 hr |
| Feb 7, 2:52 PM EST | Winter Weather Advisory | CTP | 19 hr |
| Feb 8, 2:11 PM EST | Wind Chill Advisory | CTP | 19 hr |
| Feb 12, 10:34 AM EST | Special Weather Statement | CTP | 86 min |
| Feb 12, 11:55 AM EST | Special Weather Statement | CTP | 80 min |
| Feb 13, 3:14 PM EST | Wind Advisory | CTP | 30 hr |
| Feb 18, 11:00 AM EST | High Wind Watch | CTP | 10 hr |
| Feb 18, 4:32 PM EST | Areal Flood Advisory | CTP | 15 hr |
| Feb 18, 9:18 PM EST | High Wind Warning | CTP | 24 hr |
| Feb 20, 4:29 AM EST | Winter Weather Advisory | CTP | 30 hr |
| Feb 20, 7:46 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 20, 11:50 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 21, 1:22 PM EST | Winter Weather Advisory | CTP | 17 hr |
| Feb 24, 3:00 AM EST | Flood Watch | CTP | 30 hr |
| Feb 24, 10:06 PM EST | Wind Advisory | CTP | 20 hr |
| Feb 27, 1:59 PM EST | Flood Watch | CTP | 22 hr |
| Feb 28, 6:26 AM EST | Special Weather Statement | CTP | 19 min |
| Feb 28, 8:04 AM EST | Areal Flood Advisory | CTP | 6 hr |
| Mar 4, 3:33 AM EST | Flood Watch | CTP | 3 days |
| Mar 5, 10:50 PM EST | Winter Weather Advisory | CTP | 32 hr |
| Mar 6, 2:50 PM EST | Areal Flood Advisory | CTP | 4 hr |
| Mar 6, 3:06 PM EST | Areal Flood Advisory | CTP | 4 hr |
| Mar 6, 8:00 PM EST | Areal Flood Advisory | CTP | 6 hr |
| Mar 8, 4:25 AM EST | Flood Watch | CTP | 66 hr |
| Mar 8, 2:18 PM EST | Winter Weather Advisory | CTP | 38 hr |
| Mar 10, 4:31 PM EST | Areal Flood Warning | CTP | 10 hr |
| Mar 11, 1:01 AM EST | Winter Weather Advisory | CTP | 21 hr |
| Mar 11, 2:26 AM EST | Areal Flood Warning | CTP | 8 hr |
| Mar 21, 4:27 AM EDT | Special Weather Statement | CTP | 63 min |
| Mar 22, 3:49 PM EDT | Winter Weather Advisory | CTP | 22 hr |
| Mar 23, 5:25 PM EDT | Special Weather Statement | CTP | 35 min |
| Mar 23, 5:29 PM EDT | Winter Weather Advisory | CTP | 4 hr |
| Apr 4, 10:00 PM EDT | Flood Watch | CTP | 10 hr |
| Apr 5, 4:05 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 5, 7:21 AM EDT | Areal Flood Advisory | CTP | 4 hr |
| Apr 12, 10:16 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 15, 12:54 PM EDT | Flash Flood Watch | CTP | 33 hr |
| Apr 15, 1:56 PM EDT | Wind Advisory | CTP | 32 hr |
| Apr 16, 2:52 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 16, 9:40 PM EDT | Wind Advisory | CTP | 22 hr |
| Apr 25, 1:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 25, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 25, 3:14 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Apr 25, 6:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Apr 25, 8:48 PM EDT | Special Weather Statement | CTP | 42 min |
| Apr 26, 1:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 26, 1:49 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 26, 3:04 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| Apr 26, 4:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 26, 5:03 PM EDT | Severe Thunderstorm Warning | CTP | 57 min |
| Apr 26, 5:49 PM EDT | Special Weather Statement | CTP | 56 min |
| Apr 26, 5:58 PM EDT | Severe Thunderstorm Warning | CTP | 47 min |
| Apr 26, 6:44 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 26, 6:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Apr 27, 11:16 AM EDT | Flash Flood Watch | CTP | 23 hr |
| Apr 27, 1:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 27, 3:10 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 27, 4:55 PM EDT | Severe Thunderstorm Warning | CTP | 50 min |
| Apr 27, 5:43 PM EDT | Severe Thunderstorm Warning | CTP | 62 min |
| Apr 27, 6:45 PM EDT | Severe Thunderstorm Warning | CTP | 60 min |
| Apr 27, 7:07 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 27, 10:52 PM EDT | Special Weather Statement | CTP | 23 min |
| Apr 27, 11:19 PM EDT | Special Weather Statement | CTP | 41 min |
| Apr 27, 11:25 PM EDT | Severe Thunderstorm Warning | CTP | 37 min |
| Apr 27, 11:50 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 28, 6:32 AM EDT | Wind Advisory | CTP | 5 hr |
| May 14, 4:00 AM EDT | Flash Flood Watch | CTP | 24 hr |
| May 18, 5:52 PM EDT | Flash Flood Warning | CTP | 3 hr |
| May 18, 7:47 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 23, 10:33 AM EDT | Mesoscale Discussion | SPC | 87 min |
| May 23, 2:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 24, 7:18 PM EDT | Special Weather Statement | CTP | 57 min |
| May 25, 11:10 PM EDT | Severe Thunderstorm Warning | CTP | 65 min |
| May 26, 5:35 PM EDT | Severe Thunderstorm Warning | CTP | 55 min |
| May 26, 5:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 26, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 26, 6:28 PM EDT | Severe Thunderstorm Warning | CTP | 62 min |
| May 29, 6:17 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 29, 9:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 1, 10:02 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 4, 1:21 PM EDT | Severe Thunderstorm Warning | CTP | 39 min |
| Jun 4, 1:50 PM EDT | Special Weather Statement | CTP | 25 min |
| Jun 9, 10:36 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 9, 11:33 AM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 9, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 9, 2:42 PM EDT | Special Weather Statement | CTP | 63 min |
| Jun 9, 2:55 PM EDT | Severe Thunderstorm Warning | CTP | 2 hr |
| Jun 9, 2:59 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Jun 10, 3:05 PM EDT | Special Weather Statement | CTP | 55 min |
| Jun 10, 3:35 PM EDT | Severe Thunderstorm Warning | CTP | 55 min |
| Jun 10, 4:23 PM EDT | Severe Thunderstorm Warning | CTP | 82 min |
| Jun 11, 3:22 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 11, 4:37 PM EDT | Special Weather Statement | CTP | 68 min |
| Jun 16, 6:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 16, 6:16 PM EDT | Special Weather Statement | CTP | 29 min |
| Jun 16, 6:47 PM EDT | Special Weather Statement | CTP | 43 min |
| Jun 16, 7:32 PM EDT | Special Weather Statement | CTP | 73 min |
| Jun 23, 3:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 5:29 PM EDT | Special Weather Statement | CTP | 61 min |
| Jun 23, 6:11 PM EDT | Special Weather Statement | CTP | 49 min |
| Jun 24, 4:06 AM EDT | Special Weather Statement | CTP | 54 min |
| Jun 28, 1:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 11, 5:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 20, 1:43 PM EDT | Heat Advisory | CTP | 30 hr |
| Jul 22, 5:37 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 22, 8:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 25, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 3:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 25, 3:37 PM EDT | Special Weather Statement | CTP | 38 min |
| Jul 29, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 29, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 14, 7:08 PM EDT | Special Weather Statement | CTP | 52 min |
| Aug 19, 10:50 AM EDT | Special Weather Statement | CTP | 40 min |
| Aug 19, 11:26 AM EDT | Special Weather Statement | CTP | 49 min |
| Aug 19, 12:17 PM EDT | Severe Thunderstorm Warning | CTP | 58 min |
| Aug 19, 4:52 PM EDT | Special Weather Statement | CTP | 53 min |
| Aug 20, 4:15 AM EDT | Dense Fog Advisory | CTP | 7 hr |
| Aug 21, 7:07 AM EDT | Special Weather Statement | CTP | 23 min |
| Aug 21, 12:38 PM EDT | Special Weather Statement | CTP | 52 min |
| Aug 21, 12:52 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 24, 11:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 25, 12:42 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 25, 2:31 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 25, 3:16 AM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Aug 25, 4:10 AM EDT | Special Weather Statement | CTP | 65 min |
| Aug 25, 5:01 AM EDT | Special Weather Statement | CTP | 59 min |
| Sep 4, 1:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Sep 5, 9:07 PM EDT | Flood Watch | CTP | 71 hr |
| Sep 7, 2:53 AM EDT | Areal Flood Advisory | CTP | 6 hr |
| Sep 9, 6:54 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Sep 9, 8:19 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Sep 10, 6:51 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 10, 9:02 AM EDT | Flash Flood Warning | CTP | 4 hr |
| Sep 12, 12:29 AM EDT | Dense Fog Advisory | CTP | 10 hr |
| Sep 13, 9:47 PM EDT | Special Weather Statement | CTP | 43 min |
| Sep 13, 11:00 PM EDT | Special Weather Statement | CTP | 45 min |
| Sep 13, 11:52 PM EDT | Areal Flood Advisory | CTP | 113 min |
| Sep 14, 12:13 AM EDT | Special Weather Statement | CTP | 32 min |
| Sep 23, 1:15 AM EDT | Dense Fog Advisory | CTP | 9 hr |
| Sep 23, 9:32 PM EDT | Dense Fog Advisory | CTP | 6 hr |
| Sep 27, 9:12 AM EDT | Flash Flood Watch | CTP | 40 hr |
| Sep 28, 1:11 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 28, 1:35 AM EDT | Special Weather Statement | CTP | 40 min |
| Sep 28, 2:47 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Oct 6, 1:09 PM EDT | Frost Advisory | CTP | 19 hr |
| Oct 14, 1:32 PM EDT | Wind Advisory | CTP | 30 hr |
| Oct 22, 5:22 AM EDT | Frost Advisory | CTP | 28 hr |
| Oct 28, 1:08 PM EDT | Winter Storm Warning | CTP | 33 hr |
| Nov 14, 6:03 PM EST | Mesoscale Discussion | SPC | 117 min |
| Nov 14, 8:41 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 14, 9:09 PM EST | Special Weather Statement | CTP | 51 min |
| Dec 7, 4:51 AM EST | Winter Weather Advisory | CTP | 20 hr |
| Dec 21, 4:22 PM EST | Special Weather Statement | CTP | 53 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 | 18 |
| Severe Thunderstorm Watch | 12 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 42 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 4 |
| Flood Watch | 6 |
| Areal Flood Advisory | 18 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Frost Advisory | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.