Alert archive / Pennsylvania / Lehigh County

Weather alerts in Lehigh County, Pennsylvania, 2010

196 weather alerts in 2010, 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 2010. Tap one for its archive.

Alerts: 196
Warnings: 42
Watches: 33
Advisories: 30
Busiest month: July38 alerts
Busiest day: December 1, 201010 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 Lehigh County in 2010 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Lehigh County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	1	0%
Severe thunderstorm warnings	16	13	19%	13	85%	39 min
Flash flood warnings	0			0

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Philadelphia/Mount Holly: tornado warnings	12	1	92%	4	25%	1 min
NWS Philadelphia/Mount Holly: severe thunderstorm warnings	183	107	42%	252	82%	29 min
NWS Philadelphia/Mount Holly: flash flood warnings	14	2	86%	15	60%	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
Jan 2, 10:45 AM EST	Wind Advisory	PHI	32 hr
Jan 16, 4:00 PM EST	Winter Weather Advisory	PHI	38 hr
Jan 23, 3:38 PM EST	Flood Watch	PHI	49 hr
Jan 24, 3:13 PM EST	Wind Advisory	PHI	22 hr
Feb 4, 3:23 AM EST	Winter Storm Watch	PHI	10 hr
Feb 4, 1:43 PM EST	Winter Storm Warning	PHI	51 hr
Feb 8, 3:45 AM EST	Winter Storm Watch	PHI	24 hr
Feb 8, 3:51 PM EST	Winter Storm Warning	PHI	54 hr
Feb 10, 7:27 AM EST	Mesoscale Discussion	SPC	5 hr
Feb 10, 12:20 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 14, 2:41 PM EST	Winter Storm Watch	PHI	13 hr
Feb 15, 3:40 AM EST	Winter Weather Advisory	PHI	36 hr
Feb 22, 5:28 AM EST	Winter Weather Advisory	PHI	49 hr
Feb 23, 3:30 PM EST	Winter Storm Watch	PHI	24 hr
Feb 24, 3:16 PM EST	Winter Storm Warning	PHI	48 hr
Feb 25, 11:17 AM EST	Wind Advisory	PHI	24 hr
Feb 26, 12:44 AM EST	Mesoscale Discussion	SPC	4 hr
Mar 11, 3:42 PM EST	Flood Watch	PHI	59 hr
Mar 12, 2:35 AM EST	Wind Advisory	PHI	46 hr
Apr 5, 10:00 AM EDT	Fire Weather Watch	PHI	18 hr
Apr 5, 10:00 AM EDT	Red Flag Warning	PHI	8 hr
Apr 6, 3:30 PM EDT	Fire Weather Watch	PHI	13 hr
Apr 7, 4:02 AM EDT	Red Flag Warning	PHI	17 hr
Apr 10, 10:50 AM EDT	Red Flag Warning	PHI	8 hr
Apr 13, 3:30 PM EDT	Frost Advisory	PHI	17 hr
Apr 14, 3:32 PM EDT	Frost Advisory	PHI	16 hr
Apr 19, 4:18 PM EDT	Frost Advisory	PHI	16 hr
Apr 23, 3:34 PM EDT	Frost Advisory	PHI	16 hr
Apr 27, 3:30 AM EDT	Freeze Warning	PHI	28 hr
Apr 27, 2:34 PM EDT	Fire Weather Watch	PHI	14 hr
Apr 28, 4:03 AM EDT	Freeze Warning	PHI	28 hr
Apr 28, 4:12 AM EDT	Fire Weather Watch	PHI	16 hr
Apr 28, 7:55 PM EDT	Red Flag Warning	PHI	24 hr
May 2, 11:26 PM EDT	Areal Flood Advisory	PHI	3 hr
May 2, 11:33 PM EDT	Severe Thunderstorm Warning	PHI	42 min
May 3, 12:30 AM EDT	Areal Flood Advisory	PHI	3 hr
May 3, 1:51 AM EDT	Areal Flood Advisory	PHI	6 hr
May 8, 4:15 AM EDT	Wind Advisory	PHI	25 hr
May 8, 7:59 PM EDT	Fire Weather Watch	PHI	8 hr
May 9, 4:02 AM EDT	Red Flag Warning	PHI	16 hr
May 9, 4:45 AM EDT	Freeze Warning	PHI	27 hr
May 9, 3:47 PM EDT	Freeze Watch	PHI	23 hr
May 9, 3:57 PM EDT	Fire Weather Watch	PHI	12 hr
May 10, 4:17 AM EDT	Red Flag Warning	PHI	16 hr
May 10, 2:32 PM EDT	Freeze Warning	PHI	17 hr
May 14, 3:43 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 14, 5:04 PM EDT	Severe Thunderstorm Warning	PHI	56 min
May 14, 5:38 PM EDT	Tornado Warning	PHI	37 min
May 14, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	67 min
May 27, 11:28 AM EDT	Mesoscale Discussion	SPC	92 min
May 27, 1:23 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
May 27, 4:13 PM EDT	Mesoscale Discussion	SPC	62 min
May 27, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	64 min
May 27, 6:05 PM EDT	Severe Thunderstorm Warning	PHI	25 min
May 27, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	55 min
May 27, 8:08 PM EDT	Mesoscale Discussion	SPC	97 min
May 27, 9:55 PM EDT	Areal Flood Advisory	PHI	118 min
May 29, 3:54 PM EDT	Mesoscale Discussion	SPC	96 min
May 29, 10:03 PM EDT	Special Weather Statement	PHI	57 min
Jun 3, 11:27 AM EDT	Mesoscale Discussion	SPC	93 min
Jun 3, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 4, 2:39 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 4, 4:24 PM EDT	Mesoscale Discussion	SPC	66 min
Jun 4, 7:03 PM EDT	Mesoscale Discussion	SPC	57 min
Jun 4, 11:24 PM EDT	Special Weather Statement	PHI	111 min
Jun 6, 10:25 AM EDT	Mesoscale Discussion	SPC	65 min
Jun 6, 11:08 AM EDT	Tornado Watch	SPC	8 hr
Jun 6, 1:25 PM EDT	Severe Thunderstorm Warning	PHI	65 min
Jun 6, 2:16 PM EDT	Special Weather Statement	PHI	59 min
Jun 6, 2:38 PM EDT	Mesoscale Discussion	SPC	67 min
Jun 6, 2:51 PM EDT	Special Weather Statement	PHI	54 min
Jun 13, 12:58 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 5:00 PM EDT	Special Weather Statement	PHI	60 min
Jun 24, 9:38 AM EDT	Mesoscale Discussion	SPC	97 min
Jun 24, 12:16 PM EDT	Mesoscale Discussion	SPC	89 min
Jun 24, 12:28 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 24, 3:07 PM EDT	Mesoscale Discussion	SPC	53 min
Jun 28, 12:49 PM EDT	Mesoscale Discussion	SPC	56 min
Jun 28, 1:03 PM EDT	Special Weather Statement	PHI	57 min
Jun 28, 1:12 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 28, 3:53 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 30, 4:12 AM EDT	Red Flag Warning	PHI	16 hr
Jul 1, 3:55 AM EDT	Red Flag Warning	PHI	16 hr
Jul 6, 3:23 AM EDT	Heat Advisory	PHI	17 hr
Jul 6, 4:04 PM EDT	Heat Advisory	PHI	26 hr
Jul 7, 12:55 PM EDT	Red Flag Warning	PHI	9 hr
Jul 8, 2:36 PM EDT	Special Weather Statement	PHI	39 min
Jul 10, 4:00 AM EDT	Special Weather Statement	PHI	60 min
Jul 10, 5:50 AM EDT	Special Weather Statement	PHI	85 min
Jul 10, 6:16 AM EDT	Areal Flood Advisory	PHI	3 hr
Jul 12, 6:39 PM EDT	Special Weather Statement	PHI	61 min
Jul 12, 11:42 PM EDT	Special Weather Statement	PHI	63 min
Jul 14, 3:27 AM EDT	Areal Flood Advisory	PHI	3 hr
Jul 14, 10:15 AM EDT	Flash Flood Watch	PHI	9 hr
Jul 19, 6:04 AM EDT	Special Weather Statement	PHI	56 min
Jul 19, 6:58 AM EDT	Special Weather Statement	PHI	62 min
Jul 19, 1:17 PM EDT	Mesoscale Discussion	SPC	58 min
Jul 19, 6:57 PM EDT	Special Weather Statement	PHI	48 min
Jul 21, 12:38 PM EDT	Mesoscale Discussion	SPC	67 min
Jul 21, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 21, 3:41 PM EDT	Mesoscale Discussion	SPC	64 min
Jul 21, 5:56 PM EDT	Special Weather Statement	PHI	64 min
Jul 21, 7:00 PM EDT	Mesoscale Discussion	SPC	90 min
Jul 21, 7:02 PM EDT	Special Weather Statement	PHI	58 min
Jul 21, 9:32 PM EDT	Special Weather Statement	PHI	58 min
Jul 23, 3:24 PM EDT	Heat Advisory	PHI	51 hr
Jul 23, 6:23 PM EDT	Mesoscale Discussion	SPC	67 min
Jul 23, 7:13 PM EDT	Special Weather Statement	PHI	62 min
Jul 23, 7:44 PM EDT	Special Weather Statement	PHI	61 min
Jul 23, 8:22 PM EDT	Special Weather Statement	PHI	53 min
Jul 23, 9:55 PM EDT	Special Weather Statement	PHI	95 min
Jul 24, 8:23 PM EDT	Mesoscale Discussion	SPC	67 min
Jul 24, 10:22 PM EDT	Mesoscale Discussion	SPC	83 min
Jul 24, 10:32 PM EDT	Special Weather Statement	PHI	58 min
Jul 24, 11:26 PM EDT	Special Weather Statement	PHI	49 min
Jul 25, 10:48 AM EDT	Mesoscale Discussion	SPC	27 min
Jul 25, 11:29 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 25, 12:50 PM EDT	Mesoscale Discussion	SPC	55 min
Jul 25, 12:53 PM EDT	Special Weather Statement	PHI	112 min
Jul 25, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	64 min
Aug 4, 2:56 PM EDT	Heat Advisory	PHI	29 hr
Aug 16, 12:05 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 16, 2:17 PM EDT	Mesoscale Discussion	SPC	88 min
Aug 16, 7:16 PM EDT	Mesoscale Discussion	SPC	59 min
Aug 22, 1:00 PM EDT	Special Weather Statement	PHI	60 min
Sep 7, 4:27 AM EDT	Fire Weather Watch	PHI	11 hr
Sep 7, 3:42 PM EDT	Red Flag Warning	PHI	27 hr
Sep 13, 4:03 PM EDT	Mesoscale Discussion	SPC	87 min
Sep 13, 6:06 PM EDT	Mesoscale Discussion	SPC	54 min
Sep 14, 11:00 AM EDT	Red Flag Warning	PHI	7 hr
Sep 22, 1:26 PM EDT	Mesoscale Discussion	SPC	94 min
Sep 22, 3:10 PM EDT	Mesoscale Discussion	SPC	65 min
Sep 22, 3:43 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 22, 4:46 PM EDT	Mesoscale Discussion	SPC	59 min
Sep 22, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	64 min
Sep 22, 5:58 PM EDT	Special Weather Statement	PHI	62 min
Sep 22, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	67 min
Sep 22, 7:07 PM EDT	Severe Thunderstorm Warning	PHI	53 min
Sep 22, 7:14 PM EDT	Mesoscale Discussion	SPC	61 min
Sep 28, 7:39 AM EDT	Special Weather Statement	PHI	66 min
Sep 28, 8:00 AM EDT	Mesoscale Discussion	SPC	2 hr
Sep 28, 10:05 AM EDT	Severe Thunderstorm Warning	PHI	55 min
Sep 28, 10:58 AM EDT	Tornado Watch	SPC	7 hr
Sep 28, 12:06 PM EDT	Special Weather Statement	PHI	54 min
Sep 28, 1:23 PM EDT	Special Weather Statement	PHI	52 min
Sep 28, 1:50 PM EDT	Mesoscale Discussion	SPC	55 min
Sep 29, 3:52 AM EDT	Flood Watch	PHI	49 hr
Sep 30, 7:33 AM EDT	Special Weather Statement	PHI	117 min
Sep 30, 8:03 AM EDT	Areal Flood Warning	PHI	4 hr
Sep 30, 9:31 AM EDT	Areal Flood Warning	PHI	3 hr
Sep 30, 10:49 AM EDT	Mesoscale Discussion	SPC	116 min
Sep 30, 12:39 PM EDT	Tornado Watch	SPC	6 hr
Sep 30, 1:48 PM EDT	Areal Flood Warning	PHI	6 hr
Sep 30, 3:16 PM EDT	Mesoscale Discussion	SPC	119 min
Sep 30, 7:37 PM EDT	Special Weather Statement	PHI	113 min
Sep 30, 7:50 PM EDT	Areal Flood Warning	PHI	16 hr
Sep 30, 8:29 PM EDT	Mesoscale Discussion	SPC	91 min
Sep 30, 11:36 PM EDT	Special Weather Statement	PHI	54 min
Oct 1, 1:21 AM EDT	River Flood Warning	PHI	14 hr
Oct 9, 4:00 AM EDT	Frost Advisory	PHI	28 hr
Oct 11, 3:19 PM EDT	Mesoscale Discussion	SPC	56 min
Oct 11, 3:38 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 11, 4:13 PM EDT	Special Weather Statement	PHI	2 hr
Oct 11, 6:07 PM EDT	Mesoscale Discussion	SPC	83 min
Oct 11, 8:15 PM EDT	Mesoscale Discussion	SPC	60 min
Oct 11, 9:51 PM EDT	Special Weather Statement	PHI	114 min
Oct 22, 4:31 AM EDT	Frost Advisory	PHI	27 hr
Oct 25, 7:50 PM EDT	Special Weather Statement	PHI	55 min
Oct 25, 8:46 PM EDT	Special Weather Statement	PHI	59 min
Oct 25, 9:41 PM EDT	Special Weather Statement	PHI	64 min
Nov 8, 3:19 AM EST	Wind Advisory	PHI	11 hr
Nov 16, 3:27 PM EST	Wind Advisory	PHI	27 hr
Nov 17, 12:06 AM EST	Severe Thunderstorm Watch	SPC	4 hr
Nov 17, 1:49 AM EST	Severe Thunderstorm Warning	PHI	56 min
Nov 17, 2:16 AM EST	Special Weather Statement	PHI	59 min
Nov 17, 2:40 AM EST	Severe Thunderstorm Warning	PHI	65 min
Nov 17, 3:28 AM EST	Severe Thunderstorm Warning	PHI	62 min
Nov 29, 2:40 PM EST	Flood Watch	PHI	49 hr
Nov 30, 3:15 PM EST	Wind Advisory	PHI	23 hr
Dec 1, 12:54 AM EST	Special Weather Statement	PHI	96 min
Dec 1, 6:55 AM EST	Mesoscale Discussion	SPC	65 min
Dec 1, 7:01 AM EST	Areal Flood Advisory	PHI	8 hr
Dec 1, 7:14 AM EST	Special Weather Statement	PHI	61 min
Dec 1, 7:43 AM EST	Special Weather Statement	PHI	47 min
Dec 1, 8:36 AM EST	Special Weather Statement	PHI	54 min
Dec 1, 9:31 AM EST	Special Weather Statement	PHI	59 min
Dec 1, 10:49 AM EST	Special Weather Statement	PHI	56 min
Dec 1, 11:35 AM EST	Severe Thunderstorm Warning	PHI	40 min
Dec 1, 11:48 AM EST	Special Weather Statement	PHI	57 min
Dec 1, 7:23 PM EST	River Flood Warning	PHI	4 hr
Dec 11, 3:06 PM EST	Freezing Rain Advisory	PHI	17 hr
Dec 15, 8:11 AM EST	Special Weather Statement	PHI	49 min
Dec 25, 4:16 AM EST	Winter Storm Watch	PHI	11 hr
Dec 25, 3:24 PM EST	Winter Storm Warning	PHI	38 hr
Dec 27, 2:49 AM EST	Mesoscale Discussion	SPC	4 hr
Dec 27, 4:14 AM EST	Wind Advisory	PHI	17 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
Tornado Warning	1
Severe Thunderstorm Watch	12
Tornado Watch	3
Mesoscale Discussion	45
Special Weather Statement	46
Flooding
Areal Flood Warning	4
River Flood Warning	2
Flash Flood Watch	1
Flood Watch	4
Areal Flood Advisory	7
Winter
Winter Storm Warning	4
Winter Storm Watch	5
Freezing Rain Advisory	1
Winter Weather Advisory	3
Heat
Heat Advisory	4
Cold
Freeze Warning	4
Freeze Watch	1
Frost Advisory	6
Wind and dust
Wind Advisory	9
Fire
Red Flag Warning	11
Fire Weather Watch	7

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2009 2011

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.