Alert archive / Pennsylvania / Lebanon County

Weather alerts in Lebanon County, Pennsylvania, 2021

181 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lebanon County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 181
Warnings: 47
Watches: 32
Advisories: 40
Busiest month: July57 alerts
Busiest day: July 12, 202112 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 reports fell inside a warning.

Lebanon County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			1	0%
Severe thunderstorm warnings	29	25	14%	4	100%	21 min
Flash flood warnings	3	3	0%	2	50%	250 min

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS State College, PA: tornado warnings	11	3	73%	12	25%	7 min
NWS State College, PA: severe thunderstorm warnings	289	212	27%	458	87%	23 min
NWS State College, PA: flash flood warnings	31	20	35%	46	89%	118 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, 3:16 PM EST	Winter Weather Advisory	CTP	32 hr
Jan 25, 3:29 AM EST	Winter Weather Advisory	CTP	43 hr
Jan 29, 8:54 PM EST	Winter Storm Watch	CTP	19 hr
Jan 30, 3:24 PM EST	Winter Storm Warning	CTP	13 hr
Jan 31, 4:52 AM EST	Winter Storm Warning	CTP	48 hr
Feb 2, 5:06 AM EST	Winter Weather Advisory	CTP	6 hr
Feb 6, 3:14 AM EST	Winter Weather Advisory	CTP	33 hr
Feb 10, 4:33 AM EST	Winter Weather Advisory	CTP	28 hr
Feb 13, 2:53 PM EST	Winter Weather Advisory	CTP	17 hr
Feb 14, 3:46 PM EST	Winter Storm Watch	CTP	13 hr
Feb 14, 3:46 PM EST	Winter Weather Advisory	CTP	38 hr
Feb 16, 3:35 PM EST	Winter Storm Watch	CTP	23 hr
Feb 17, 2:39 PM EST	Winter Storm Warning	CTP	22 hr
Feb 18, 12:25 PM EST	Winter Weather Advisory	CTP	22 hr
Feb 21, 2:29 PM EST	Winter Weather Advisory	CTP	23 hr
Feb 22, 7:48 AM EST	Mesoscale Discussion	SPC	4 hr
Feb 22, 8:15 AM EST	Snow Squall Warning	CTP	90 min
Mar 1, 2:33 AM EST	Dense Fog Advisory	CTP	5 hr
Mar 1, 3:40 AM EST	Wind Advisory	CTP	23 hr
Mar 13, 2:42 PM EST	Fire Weather Watch	CTP	13 hr
Mar 14, 4:19 AM EDT	Red Flag Warning	CTP	18 hr
Mar 25, 1:44 AM EDT	Dense Fog Advisory	CTP	7 hr
Mar 25, 11:51 AM EDT	Wind Advisory	CTP	30 hr
Mar 28, 4:26 PM EDT	Special Weather Statement	CTP	49 min
Apr 11, 4:54 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 21, 2:11 AM EDT	Freeze Watch	CTP	5 hr
Apr 21, 7:07 AM EDT	Freeze Warning	CTP	26 hr
Apr 22, 9:16 AM EDT	Freeze Watch	CTP	4 hr
Apr 22, 1:06 PM EDT	Freeze Warning	CTP	20 hr
Apr 29, 3:58 AM EDT	High Wind Watch	CTP	16 hr
Apr 29, 8:21 PM EDT	High Wind Warning	CTP	27 hr
Apr 29, 8:21 PM EDT	Wind Advisory	CTP	30 hr
May 26, 12:59 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 26, 2:33 PM EDT	Severe Thunderstorm Warning	CTP	57 min
May 26, 3:23 PM EDT	Severe Thunderstorm Warning	CTP	82 min
May 26, 3:51 PM EDT	Severe Thunderstorm Warning	CTP	54 min
May 26, 4:41 PM EDT	Mesoscale Discussion	SPC	64 min
May 26, 6:35 PM EDT	Special Weather Statement	CTP	25 min
Jun 3, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 4, 1:36 PM EDT	Special Weather Statement	CTP	39 min
Jun 14, 1:40 PM EDT	Mesoscale Discussion	SPC	3 hr
Jun 14, 2:06 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 20, 9:29 PM EDT	Areal Flood Advisory	CTP	2 hr
Jun 20, 9:55 PM EDT	Special Weather Statement	PHI	35 min
Jun 21, 1:51 PM EDT	Mesoscale Discussion	SPC	114 min
Jun 21, 2:20 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 28, 10:35 PM EDT	Heat Advisory	CTP	20 hr
Jun 29, 8:56 PM EDT	Heat Advisory	CTP	22 hr
Jun 30, 4:41 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 30, 4:51 PM EDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 30, 6:58 PM EDT	Mesoscale Discussion	SPC	92 min
Jul 1, 1:51 PM EDT	Special Weather Statement	CTP	24 min
Jul 2, 3:13 PM EDT	Mesoscale Discussion	SPC	92 min
Jul 2, 4:04 PM EDT	Special Weather Statement	CTP	26 min
Jul 5, 2:13 PM EDT	Heat Advisory	CTP	28 hr
Jul 6, 12:33 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 6, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 6, 4:05 PM EDT	Severe Thunderstorm Warning	CTP	40 min
Jul 6, 4:23 PM EDT	Mesoscale Discussion	SPC	97 min
Jul 6, 4:41 PM EDT	Severe Thunderstorm Warning	CTP	33 min
Jul 6, 6:59 PM EDT	Heat Advisory	CTP	24 hr
Jul 8, 3:15 PM EDT	Severe Thunderstorm Warning	CTP	60 min
Jul 8, 3:38 PM EDT	Severe Thunderstorm Warning	CTP	52 min
Jul 8, 4:36 PM EDT	Special Weather Statement	CTP	54 min
Jul 8, 4:36 PM EDT	Mesoscale Discussion	SPC	114 min
Jul 8, 4:48 PM EDT	Severe Thunderstorm Warning	CTP	27 min
Jul 8, 4:51 PM EDT	Areal Flood Advisory	CTP	103 min
Jul 9, 4:16 PM EDT	Severe Thunderstorm Warning	CTP	74 min
Jul 9, 4:35 PM EDT	Mesoscale Discussion	SPC	115 min
Jul 9, 4:49 PM EDT	Severe Thunderstorm Warning	CTP	56 min
Jul 9, 5:24 PM EDT	Severe Thunderstorm Warning	CTP	81 min
Jul 11, 2:40 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 11, 8:44 PM EDT	Severe Thunderstorm Warning	CTP	76 min
Jul 11, 8:58 PM EDT	Mesoscale Discussion	SPC	62 min
Jul 11, 9:32 PM EDT	Severe Thunderstorm Warning	CTP	58 min
Jul 11, 10:06 PM EDT	Flash Flood Warning	CTP	118 min
Jul 11, 10:35 PM EDT	Special Weather Statement	CTP	70 min
Jul 12, 12:04 AM EDT	Areal Flood Advisory	CTP	116 min
Jul 12, 1:21 PM EDT	Flash Flood Watch	CTP	13 hr
Jul 12, 1:32 PM EDT	Mesoscale Discussion	SPC	88 min
Jul 12, 3:17 PM EDT	Special Weather Statement	CTP	43 min
Jul 12, 3:34 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 12, 4:11 PM EDT	Severe Thunderstorm Warning	CTP	34 min
Jul 12, 4:42 PM EDT	Severe Thunderstorm Warning	CTP	63 min
Jul 12, 11:52 PM EDT	Special Weather Statement	CTP	23 min
Jul 13, 12:53 AM EDT	Special Weather Statement	CTP	22 min
Jul 13, 12:48 PM EDT	Mesoscale Discussion	SPC	87 min
Jul 13, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 16, 1:46 PM EDT	Flash Flood Watch	CTP	32 hr
Jul 16, 5:51 PM EDT	Mesoscale Discussion	SPC	114 min
Jul 17, 12:00 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 17, 1:13 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 17, 2:13 PM EDT	Severe Thunderstorm Warning	CTP	47 min
Jul 17, 2:47 PM EDT	Areal Flood Advisory	CTP	2 hr
Jul 17, 3:02 PM EDT	Severe Thunderstorm Warning	CTP	43 min
Jul 17, 4:07 PM EDT	Areal Flood Advisory	CTP	2 hr
Jul 17, 4:38 PM EDT	Mesoscale Discussion	SPC	97 min
Jul 17, 5:20 PM EDT	Areal Flood Advisory	CTP	2 hr
Jul 17, 5:56 PM EDT	Flash Flood Warning Considerable damage threat	CTP	3 hr
Jul 17, 6:44 PM EDT	Severe Thunderstorm Warning	CTP	46 min
Jul 17, 6:54 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 21, 11:56 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 12:22 PM EDT	Special Weather Statement	CTP	38 min
Jul 21, 1:29 PM EDT	Special Weather Statement	CTP	31 min
Jul 21, 5:02 PM EDT	Special Weather Statement	CTP	28 min
Jul 21, 5:30 PM EDT	Special Weather Statement	CTP	30 min
Jul 29, 2:23 PM EDT	Tornado Watch	SPC	8 hr
Jul 29, 4:26 PM EDT	Mesoscale Discussion	SPC	94 min
Aug 1, 6:27 PM EDT	Severe Thunderstorm Warning	CTP	33 min
Aug 1, 6:59 PM EDT	Special Weather Statement	CTP	46 min
Aug 10, 12:55 PM EDT	Heat Advisory	CTP	30 hr
Aug 10, 12:55 PM EDT	Heat Advisory	CTP	54 hr
Aug 10, 2:21 PM EDT	Special Weather Statement	CTP	24 min
Aug 10, 2:30 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 10, 2:32 PM EDT	Severe Thunderstorm Warning	CTP	43 min
Aug 10, 5:52 PM EDT	Special Weather Statement	CTP	38 min
Aug 10, 6:17 PM EDT	Severe Thunderstorm Warning	CTP	73 min
Aug 11, 3:38 AM EDT	Excessive Heat Warning	CTP	39 hr
Aug 11, 2:03 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 11, 2:32 PM EDT	Severe Thunderstorm Warning	CTP	58 min
Aug 11, 3:02 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 11, 4:54 PM EDT	Special Weather Statement	CTP	36 min
Aug 11, 5:44 PM EDT	Areal Flood Advisory	CTP	2 hr
Aug 12, 3:33 AM EDT	Excessive Heat Warning	CTP	39 hr
Aug 12, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 12, 9:59 PM EDT	Severe Thunderstorm Warning	CTP	31 min
Aug 12, 10:08 PM EDT	Mesoscale Discussion	SPC	67 min
Aug 12, 10:31 PM EDT	Severe Thunderstorm Warning	CTP	59 min
Aug 12, 10:34 PM EDT	Special Weather Statement	CTP	26 min
Aug 12, 11:03 PM EDT	Special Weather Statement	CTP	27 min
Aug 12, 11:10 PM EDT	Severe Thunderstorm Warning	CTP	34 min
Aug 13, 12:33 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 13, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 13, 4:07 PM EDT	Severe Thunderstorm Warning	CTP	53 min
Aug 17, 2:13 PM EDT	Flash Flood Watch	CTP	34 hr
Aug 18, 10:58 AM EDT	Mesoscale Discussion	SPC	92 min
Aug 18, 11:37 AM EDT	Tornado Watch	SPC	11 hr
Aug 18, 3:29 PM EDT	Mesoscale Discussion	SPC	91 min
Aug 18, 4:57 PM EDT	Mesoscale Discussion	SPC	93 min
Aug 18, 6:47 PM EDT	Severe Thunderstorm Warning	CTP	43 min
Aug 18, 8:08 PM EDT	Severe Thunderstorm Warning	CTP	37 min
Aug 18, 8:27 PM EDT	Areal Flood Advisory	CTP	3 hr
Aug 22, 5:01 AM EDT	Flood Watch	CTP	24 hr
Aug 22, 5:47 AM EDT	Areal Flood Advisory	CTP	118 min
Aug 23, 5:20 PM EDT	Special Weather Statement	CTP	25 min
Aug 27, 4:40 AM EDT	Flash Flood Watch	CTP	17 hr
Aug 27, 5:38 PM EDT	Areal Flood Advisory	CTP	2 hr
Aug 27, 5:46 PM EDT	Areal Flood Advisory	CTP	80 min
Aug 27, 6:05 PM EDT	Special Weather Statement	CTP	25 min
Aug 27, 6:18 PM EDT	Areal Flood Advisory	CTP	2 hr
Aug 28, 12:57 AM EDT	Areal Flood Advisory	CTP	2 hr
Aug 30, 4:11 AM EDT	Flash Flood Watch	CTP	67 hr
Aug 31, 11:30 AM EDT	River Flood Warning	CTP	3 days
Aug 31, 11:30 AM EDT	River Flood Warning	CTP	67 hr
Sep 1, 9:45 AM EDT	Areal Flood Advisory	CTP	2 hr
Sep 1, 12:04 PM EDT	Flash Flood Warning Considerable damage threat	CTP	6 hr
Sep 1, 5:41 PM EDT	Areal Flood Warning	CTP	14 hr
Sep 8, 4:15 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 8, 10:22 PM EDT	Areal Flood Advisory	CTP	68 min
Sep 8, 11:24 PM EDT	Areal Flood Advisory	CTP	96 min
Sep 9, 5:15 PM EDT	Special Weather Statement	CTP	45 min
Sep 15, 10:33 AM EDT	Mesoscale Discussion	SPC	2 hr
Sep 15, 11:55 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 15, 4:38 PM EDT	Mesoscale Discussion	SPC	67 min
Sep 15, 5:54 PM EDT	Special Weather Statement	CTP	36 min
Sep 15, 6:17 PM EDT	Severe Thunderstorm Warning	CTP	43 min
Sep 15, 6:29 PM EDT	Special Weather Statement	PHI	31 min
Sep 15, 8:11 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 22, 3:42 AM EDT	Flash Flood Watch	CTP	33 hr
Sep 23, 3:13 AM EDT	Mesoscale Discussion	SPC	5 hr
Sep 23, 5:36 PM EDT	River Flood Warning	CTP	12 hr
Oct 14, 3:10 AM EDT	Dense Fog Advisory	CTP	6 hr
Oct 16, 11:06 AM EDT	Mesoscale Discussion	SPC	114 min
Oct 16, 1:27 PM EDT	Special Weather Statement	CTP	63 min
Nov 1, 4:23 AM EDT	Freeze Watch	CTP	22 hr
Nov 2, 2:47 AM EDT	Freeze Warning	CTP	30 hr
Nov 28, 9:15 PM EST	Special Weather Statement	CTP	30 min
Dec 10, 11:15 AM EST	Wind Advisory	CTP	38 hr
Dec 11, 7:29 PM EST	Mesoscale Discussion	SPC	3 hr
Dec 26, 2:58 PM EST	Winter Weather Advisory	CTP	33 hr
Dec 30, 10:09 PM EST	Dense Fog Advisory	CTP	12 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	29
Severe Thunderstorm Watch	15
Tornado Watch	2
Mesoscale Discussion	34
Special Weather Statement	28
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
River Flood Warning	3
Flash Flood Watch	6
Flood Watch	1
Areal Flood Advisory	16
Winter
Snow Squall Warning	1
Winter Storm Warning	3
Winter Storm Watch	3
Winter Weather Advisory	10
Heat
Excessive Heat Warning	2
Heat Advisory	6
Cold
Freeze Warning	3
Freeze Watch	3
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	4
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2020 2022

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.