Alert archive / Pennsylvania / Lehigh County
Weather alerts in Lehigh County, Pennsylvania, 2022
149 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lehigh County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 149
- Warnings
- 28
- Watches
- 18
- Advisories
- 50
- Busiest month
- May27 alerts
- Busiest day
- May 20, 202210 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lehigh County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 11 | 21% | 3 | 100% | 19 min |
| Flash flood warnings | 3 | 0 | 100% | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 7 | 0 | 100% | 3 | 0% | |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 170 | 93 | 45% | 306 | 90% | 21 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 19 | 9 | 53% | 26 | 81% | 45 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, 9:44 PM EST | Dense Fog Advisory | PHI | 12 hr |
| Jan 4, 3:00 PM EST | Winter Weather Advisory | PHI | 21 hr |
| Jan 5, 3:06 PM EST | Winter Weather Advisory | PHI | 43 hr |
| Jan 8, 3:51 AM EST | Winter Weather Advisory | PHI | 35 hr |
| Jan 15, 2:58 PM EST | Winter Weather Advisory | PHI | 37 hr |
| Jan 19, 3:03 PM EST | Winter Weather Advisory | PHI | 20 hr |
| Jan 28, 3:23 AM EST | Winter Weather Advisory | PHI | 35 hr |
| Feb 2, 3:21 PM EST | Dense Fog Advisory | PHI | 15 hr |
| Feb 3, 3:10 AM EST | Winter Weather Advisory | PHI | 42 hr |
| Feb 3, 1:33 PM EST | Dense Fog Advisory | PHI | 8 hr |
| Feb 3, 5:32 PM EST | Areal Flood Advisory | PHI | 3 hr |
| Feb 12, 3:10 PM EST | Winter Weather Advisory | PHI | 25 hr |
| Feb 17, 3:49 AM EST | Wind Advisory | PHI | 30 hr |
| Feb 18, 11:54 AM EST | Wind Advisory | PHI | 33 hr |
| Feb 19, 12:18 PM EST | Special Weather Statement | PHI | 3 hr |
| Feb 19, 12:53 PM EST | Snow Squall Warning | PHI | 52 min |
| Feb 19, 12:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 19, 1:19 PM EST | Snow Squall Warning | PHI | 56 min |
| Feb 19, 1:36 PM EST | Snow Squall Warning | PHI | 54 min |
| Feb 19, 2:20 PM EST | Snow Squall Warning | PHI | 40 min |
| Feb 23, 3:45 AM EST | Winter Storm Watch | PHI | 24 hr |
| Feb 24, 3:38 AM EST | Winter Weather Advisory | PHI | 33 hr |
| Feb 24, 9:13 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 7, 2:57 AM EST | Wind Advisory | PHI | 22 hr |
| Mar 7, 5:53 PM EST | Mesoscale Discussion | SPC | 97 min |
| Mar 7, 6:19 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 7, 7:29 PM EST | Severe Thunderstorm Warning | PHI | 61 min |
| Mar 7, 7:42 PM EST | Mesoscale Discussion | SPC | 93 min |
| Mar 7, 8:05 PM EST | Severe Thunderstorm Warning | PHI | 70 min |
| Mar 11, 3:57 AM EST | Winter Storm Watch | PHI | 11 hr |
| Mar 11, 3:57 AM EST | Winter Storm Warning | PHI | 38 hr |
| Mar 11, 3:19 PM EST | Wind Advisory | PHI | 34 hr |
| Mar 12, 8:53 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 12, 1:51 PM EST | Special Weather Statement | PHI | 39 min |
| Mar 18, 12:55 AM EDT | Dense Fog Advisory | PHI | 10 hr |
| Mar 19, 2:33 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 19, 5:52 PM EDT | Severe Thunderstorm Warning | PHI | 68 min |
| Mar 19, 7:20 PM EDT | Special Weather Statement | PHI | 25 min |
| Mar 31, 3:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 4:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Mar 31, 7:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Mar 31, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Mar 31, 8:14 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Mar 31, 8:47 PM EDT | Severe Thunderstorm Warning | PHI | 58 min |
| Mar 31, 9:12 PM EDT | Flash Flood Warning | PHI | 2 hr |
| Apr 7, 12:05 PM EDT | Flood Watch | PHI | 13 hr |
| Apr 7, 7:01 PM EDT | Areal Flood Advisory | PHI | 5 hr |
| Apr 7, 7:03 PM EDT | Areal Flood Advisory | PHI | 5 hr |
| Apr 8, 12:36 AM EDT | Areal Flood Warning | PHI | 7 hr |
| Apr 14, 2:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Apr 14, 2:53 PM EDT | Special Weather Statement | PHI | 22 min |
| Apr 18, 2:41 PM EDT | Flood Watch | PHI | 15 hr |
| Apr 20, 3:14 AM EDT | Frost Advisory | PHI | 27 hr |
| Apr 27, 3:05 PM EDT | Fire Weather Watch | PHI | 13 hr |
| Apr 27, 3:05 PM EDT | Fire Weather Watch | PHI | 36 hr |
| Apr 27, 5:51 PM EDT | Freeze Warning | PHI | 12 hr |
| Apr 28, 3:59 AM EDT | Red Flag Warning | PHI | 18 hr |
| Apr 28, 2:42 PM EDT | Freeze Warning | PHI | 17 hr |
| Apr 29, 3:27 AM EDT | Red Flag Warning | PHI | 18 hr |
| May 7, 10:39 AM EDT | Areal Flood Advisory | PHI | 5 hr |
| May 7, 12:14 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 16, 1:12 PM EDT | Special Weather Statement | PHI | 63 min |
| May 16, 1:33 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 16, 2:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 20, 11:35 AM EDT | Tornado Watch | SPC | 7 hr |
| May 20, 1:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| May 20, 2:22 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| May 20, 2:53 PM EDT | Severe Thunderstorm Warning | PHI | 52 min |
| May 20, 3:10 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| May 20, 3:25 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| May 20, 3:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 20, 3:41 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| May 20, 3:52 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| May 20, 3:55 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| May 21, 12:12 AM EDT | Dense Fog Advisory | PHI | 9 hr |
| May 22, 12:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 22, 4:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 22, 5:02 PM EDT | Severe Thunderstorm Warning | PHI | 58 min |
| May 27, 3:23 AM EDT | Flood Watch | PHI | 21 hr |
| May 27, 11:55 AM EDT | Mesoscale Discussion | SPC | 95 min |
| May 27, 12:57 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 27, 2:46 PM EDT | Special Weather Statement | PHI | 29 min |
| May 27, 3:08 PM EDT | Special Weather Statement | PHI | 37 min |
| May 27, 3:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 28, 10:18 AM EDT | Areal Flood Advisory | PHI | 98 min |
| Jun 1, 2:19 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 1, 4:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 2, 12:33 AM EDT | Special Weather Statement | PHI | 27 min |
| Jun 9, 1:39 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 12, 6:51 PM EDT | Special Weather Statement | PHI | 24 min |
| Jun 16, 6:45 AM EDT | Areal Flood Advisory | PHI | 116 min |
| Jun 16, 7:51 AM EDT | Areal Flood Advisory | PHI | 99 min |
| Jul 1, 2:04 PM EDT | Severe Thunderstorm Warning | PHI | 20 min |
| Jul 2, 8:14 PM EDT | Special Weather Statement | PHI | 61 min |
| Jul 12, 11:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 1:26 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 12, 4:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 18, 12:18 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 18, 1:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 4:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 18, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 20, 3:48 AM EDT | Heat Advisory | PHI | 40 hr |
| Jul 22, 3:14 PM EDT | Heat Advisory | PHI | 3 days |
| Jul 28, 3:31 PM EDT | Special Weather Statement | PHI | 29 min |
| Jul 28, 3:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 28, 4:01 PM EDT | Special Weather Statement | PHI | 29 min |
| Jul 28, 4:34 PM EDT | Special Weather Statement | PHI | 26 min |
| Jul 28, 5:01 PM EDT | Special Weather Statement | PHI | 29 min |
| Jul 28, 5:30 PM EDT | Special Weather Statement | PHI | 30 min |
| Aug 2, 2:22 PM EDT | Heat Advisory | PHI | 7 days |
| Aug 7, 8:22 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Aug 9, 12:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 4:02 PM EDT | Special Weather Statement | PHI | 28 min |
| Aug 9, 4:32 PM EDT | Special Weather Statement | PHI | 28 min |
| Aug 22, 1:46 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 22, 4:10 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 22, 5:00 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 22, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| Aug 22, 6:01 PM EDT | Flash Flood Warning | PHI | 111 min |
| Aug 23, 3:23 AM EDT | Dense Fog Advisory | PHI | 6 hr |
| Aug 30, 1:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 30, 5:17 PM EDT | Special Weather Statement | PHI | 28 min |
| Aug 30, 5:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Sep 5, 3:04 AM EDT | Flood Watch | PHI | 35 hr |
| Sep 6, 7:00 AM EDT | Areal Flood Advisory | PHI | 114 min |
| Sep 12, 5:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 12, 11:27 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 13, 2:17 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 22, 8:58 AM EDT | Special Weather Statement | PHI | 62 min |
| Sep 25, 8:49 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Oct 8, 3:39 AM EDT | Frost Advisory | PHI | 28 hr |
| Oct 13, 5:55 PM EDT | Special Weather Statement | PHI | 35 min |
| Oct 13, 7:21 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Oct 13, 7:34 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Oct 13, 11:35 PM EDT | Areal Flood Advisory | PHI | 58 min |
| Oct 18, 3:42 AM EDT | Freeze Warning | PHI | 29 hr |
| Nov 12, 4:09 AM EST | Special Weather Statement | PHI | 36 min |
| Nov 18, 5:41 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 30, 3:48 PM EST | Special Weather Statement | PHI | 42 min |
| Dec 7, 8:26 AM EST | Dense Fog Advisory | PHI | 3 hr |
| Dec 14, 3:16 AM EST | Winter Weather Advisory | PHI | 45 hr |
| Dec 15, 11:24 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 21, 3:27 PM EST | Flood Watch | PHI | 34 hr |
| Dec 22, 3:38 AM EST | Wind Advisory | PHI | 42 hr |
| Dec 22, 8:33 AM EST | Winter Weather Advisory | PHI | 6 hr |
| Dec 22, 2:58 PM EST | Wind Chill Advisory | PHI | 46 hr |
| Dec 23, 9:09 AM EST | Winter Weather Advisory | PHI | 9 hr |
| Dec 31, 5:36 AM EST | Dense Fog Advisory | PHI | 22 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 | 14 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 31 |
| Special Weather Statement | 22 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 3 |
| Flood Watch | 5 |
| Areal Flood Advisory | 19 |
| Winter | |
| Snow Squall Warning | 4 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 5 |
| 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 archive20212023
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.