Alert archive / Pennsylvania / Indiana County
Weather alerts in Indiana County, Pennsylvania, 2011
129 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Indiana County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 129
- Warnings
- 31
- Watches
- 14
- Advisories
- 4
- Busiest month
- July26 alerts
- Busiest day
- April 26, 20118 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 Indiana County in 2011 had a tornado report inside them.
Indiana County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 24 | 18 | 25% | 12 | 75% | 28 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 112 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 9 | 1 | 89% | 1 | 100% | 8 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 231 | 161 | 30% | 428 | 83% | 22 min |
| NWS Pittsburgh, PA: flash flood warnings | 21 | 11 | 48% | 23 | 91% | 81 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 6, 10:40 PM EST | Special Weather Statement | PBZ | 110 min |
| Jan 7, 7:09 AM EST | Special Weather Statement | PBZ | 51 min |
| Jan 7, 7:59 AM EST | Special Weather Statement | PBZ | 61 min |
| Jan 26, 7:30 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 12:12 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 8:39 PM EST | Mesoscale Discussion | SPC | 6 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, 5:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 28, 5:47 AM EST | Tornado Watch | SPC | 5 hr |
| Feb 28, 6:32 AM EST | Special Weather Statement | PBZ | 28 min |
| Feb 28, 8:14 AM EST | Areal Flood Warning | PBZ | 10 hr |
| Mar 8, 9:53 PM EST | River Flood Watch | PBZ | 30 hr |
| Mar 10, 3:54 PM EST | Areal Flood Advisory | PBZ | 7 hr |
| Mar 10, 9:54 PM EST | Areal Flood Warning | PBZ | 12 hr |
| Mar 21, 4:03 AM EDT | Special Weather Statement | PBZ | 57 min |
| Mar 23, 3:45 PM EDT | Severe Thunderstorm Warning | PBZ | 60 min |
| Mar 23, 3:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Mar 23, 4:25 PM EDT | Severe Thunderstorm Warning | PBZ | 65 min |
| Mar 23, 4:34 PM EDT | Severe Thunderstorm Warning | PBZ | 56 min |
| Mar 23, 4:54 PM EDT | Tornado Warning | PBZ | 36 min |
| Mar 23, 5:22 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Apr 4, 10:59 AM EDT | Special Weather Statement | PBZ | 2 hr |
| Apr 4, 2:55 PM EDT | Special Weather Statement | PBZ | 65 min |
| Apr 4, 6:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Apr 19, 8:43 PM EDT | Special Weather Statement | PBZ | 47 min |
| Apr 20, 2:22 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 20, 3:20 AM EDT | Mesoscale Discussion | SPC | 85 min |
| 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, 6:00 PM EDT | Mesoscale Discussion | SPC | 60 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, 3:01 PM EDT | Special Weather Statement | PBZ | 14 min |
| Apr 26, 4:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 26, 4:28 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Apr 26, 4:44 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Apr 26, 5:16 PM EDT | Severe Thunderstorm Warning | PBZ | 14 min |
| Apr 26, 6:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Apr 27, 1:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 27, 3:10 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 27, 4:06 PM EDT | Special Weather Statement | PBZ | 54 min |
| Apr 27, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | 30 min |
| Apr 27, 4:32 PM EDT | Severe Thunderstorm Warning | PBZ | 58 min |
| Apr 27, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| May 15, 8:42 AM EDT | Special Weather Statement | PBZ | 3 hr |
| May 15, 10:28 AM EDT | Areal Flood Warning | PBZ | 6 hr |
| May 15, 6:28 PM EDT | Special Weather Statement | PBZ | 47 min |
| May 18, 11:55 AM EDT | Mesoscale Discussion | SPC | 65 min |
| May 18, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 18, 3:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 23, 10:33 AM EDT | Mesoscale Discussion | SPC | 87 min |
| May 24, 12:10 AM EDT | Special Weather Statement | PBZ | 35 min |
| May 26, 4:53 PM EDT | Severe Thunderstorm Warning | PBZ | 52 min |
| May 26, 4:56 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| May 26, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| May 26, 5:40 PM EDT | Severe Thunderstorm Warning | PBZ | 33 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 27, 5:51 PM EDT | Special Weather Statement | PBZ | 39 min |
| May 27, 6:28 PM EDT | Special Weather Statement | PBZ | 62 min |
| Jun 4, 2:22 PM EDT | Special Weather Statement | PBZ | 53 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, 2:51 PM EDT | Severe Thunderstorm Warning | PBZ | 54 min |
| Jun 10, 2:52 PM EDT | Special Weather Statement | PBZ | 53 min |
| Jun 16, 5:53 PM EDT | Special Weather Statement | PBZ | 52 min |
| Jun 16, 6:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 16, 6:58 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 16, 7:04 PM EDT | Special Weather Statement | PBZ | 26 min |
| Jun 23, 12:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 23, 3:21 PM EDT | Special Weather Statement | PBZ | 54 min |
| Jun 23, 3:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 4:54 PM EDT | Special Weather Statement | PBZ | 66 min |
| Jun 28, 1:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 11, 5:14 PM EDT | Severe Thunderstorm Warning | PBZ | 61 min |
| Jul 11, 5:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 18, 1:18 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 18, 2:53 PM EDT | Special Weather Statement | PBZ | 22 min |
| Jul 22, 5:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 22, 5:37 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 22, 5:48 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Jul 22, 8:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 25, 8:58 AM EDT | Special Weather Statement | PBZ | 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, 3:48 PM EDT | Special Weather Statement | PBZ | 42 min |
| Jul 25, 4:29 PM EDT | Special Weather Statement | PBZ | 46 min |
| Jul 25, 5:30 PM EDT | Special Weather Statement | PBZ | 30 min |
| Jul 25, 6:03 PM EDT | Special Weather Statement | PBZ | 27 min |
| Jul 28, 4:03 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 28, 4:28 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Jul 28, 5:01 PM EDT | Special Weather Statement | PBZ | 29 min |
| Jul 28, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Jul 28, 6:16 PM EDT | Severe Thunderstorm Warning | PBZ | 59 min |
| Jul 28, 7:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 28, 7:10 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 29, 2:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 29, 2:17 PM EDT | Special Weather Statement | PBZ | 28 min |
| Jul 29, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 29, 4:50 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Aug 1, 3:11 PM EDT | Special Weather Statement | PBZ | 49 min |
| Aug 1, 3:20 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Aug 1, 3:52 PM EDT | Severe Thunderstorm Warning | PBZ | 23 min |
| Aug 1, 4:42 PM EDT | Special Weather Statement | PBZ | 48 min |
| Aug 7, 3:08 AM EDT | Flash Flood Warning | PBZ | 3 hr |
| Aug 8, 3:28 PM EDT | Special Weather Statement | PBZ | 47 min |
| Aug 19, 10:07 AM EDT | Special Weather Statement | PBZ | 53 min |
| Aug 21, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | 62 min |
| 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, 5:00 AM EDT | Special Weather Statement | PBZ | 60 min |
| Sep 1, 7:49 AM EDT | Special Weather Statement | PBZ | 56 min |
| Sep 4, 1:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Sep 5, 10:29 PM EDT | River Flood Watch | PBZ | 35 hr |
| Sep 9, 8:23 PM EDT | Special Weather Statement | PBZ | 52 min |
| Sep 9, 9:25 PM EDT | Special Weather Statement | PBZ | 50 min |
| Sep 10, 8:35 AM EDT | Special Weather Statement | PBZ | 55 min |
| Sep 10, 9:12 AM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Sep 10, 10:48 AM EDT | Areal Flood Warning | PBZ | 4 hr |
| Nov 14, 8:41 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 14, 9:48 PM EST | Special Weather Statement | PBZ | 57 min |
| Nov 22, 9:07 PM EST | Areal Flood Warning | PBZ | 6 hr |
| Dec 15, 4:51 PM EST | Special Weather Statement | PBZ | 69 min |
| Dec 15, 6:19 PM EST | Special Weather Statement | PBZ | 86 min |
| Dec 21, 3:49 PM EST | Special Weather Statement | PBZ | 26 min |
| Dec 21, 4:18 PM EST | Special Weather Statement | PBZ | 42 min |
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 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.