Alert archive / Pennsylvania / York County

Weather alerts in York County, Pennsylvania, 2023

155 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

York County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts: 155
Warnings: 42
Watches: 26
Advisories: 23
Busiest month: July51 alerts
Busiest day: September 7, 202312 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

2 of 2 tornado warnings covering York County in 2023 had a tornado report inside them; 2 of 4 tornado reports fell inside a warning, on average 3 minutes after it went out.

York County, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	2	0%	4	50%	3 min
Severe thunderstorm warnings	32	26	19%	48	85%	15 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS State College, PA: tornado warnings	18	5	72%	15	40%	3 min
NWS State College, PA: severe thunderstorm warnings	186	136	27%	381	83%	19 min
NWS State College, PA: flash flood warnings	8	3	63%	8	63%	42 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 24, 4:16 AM EST	Winter Weather Advisory	CTP	42 hr
Feb 21, 3:22 AM EST	Wind Advisory	CTP	16 hr
Feb 21, 2:22 PM EST	Mesoscale Discussion	SPC	53 min
Mar 3, 12:41 PM EST	Wind Advisory	CTP	26 hr
Mar 13, 2:35 PM EDT	Wind Advisory	CTP	33 hr
Mar 23, 8:37 PM EDT	Special Weather Statement	CTP	23 min
Mar 31, 3:22 PM EDT	High Wind Warning	CTP	30 hr
Mar 31, 3:22 PM EDT	Wind Advisory	CTP	35 hr
Apr 1, 2:27 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 1, 4:50 PM EDT	Severe Thunderstorm Warning	CTP	40 min
Apr 1, 5:16 PM EDT	Severe Thunderstorm Warning	CTP	74 min
Apr 2, 11:00 AM EDT	Frost Advisory	CTP	22 hr
Apr 7, 8:03 PM EDT	Freeze Watch	CTP	7 hr
Apr 8, 3:07 AM EDT	Freeze Warning	CTP	30 hr
Apr 8, 11:50 AM EDT	Freeze Watch	CTP	22 hr
Apr 9, 9:28 AM EDT	Freeze Warning	CTP	24 hr
Apr 11, 3:49 PM EDT	Fire Weather Watch	CTP	17 hr
Apr 12, 8:54 AM EDT	Red Flag Warning	CTP	11 hr
Apr 16, 7:41 AM EDT	Dense Fog Advisory	CTP	2 hr
Apr 22, 2:10 PM EDT	Special Weather Statement	CTP	35 min
Apr 22, 2:33 PM EDT	Severe Thunderstorm Warning	CTP	42 min
Apr 22, 2:38 PM EDT	Severe Thunderstorm Warning	CTP	37 min
Apr 22, 2:47 PM EDT	Mesoscale Discussion	SPC	118 min
Apr 22, 3:04 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 22, 3:16 PM EDT	Severe Thunderstorm Warning	CTP	44 min
Apr 23, 12:52 PM EDT	Frost Advisory	CTP	19 hr
Apr 24, 2:09 PM EDT	Frost Advisory	CTP	19 hr
Apr 30, 2:23 AM EDT	Special Weather Statement	CTP	22 min
Apr 30, 8:31 AM EDT	Flood Watch	CTP	11 hr
May 17, 11:05 AM EDT	Frost Advisory	CTP	21 hr
Jun 3, 1:27 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 3, 7:58 PM EDT	Severe Thunderstorm Warning	CTP	47 min
Jun 5, 3:30 PM EDT	Fire Weather Watch	CTP	17 hr
Jun 6, 8:26 AM EDT	Red Flag Warning	CTP	12 hr
Jun 9, 5:28 PM EDT	Special Weather Statement	CTP	32 min
Jun 9, 6:36 PM EDT	Special Weather Statement	CTP	24 min
Jun 9, 7:02 PM EDT	Special Weather Statement	CTP	28 min
Jun 12, 1:16 PM EDT	Special Weather Statement	CTP	44 min
Jun 12, 1:27 PM EDT	Tornado Warning	CTP	18 min
Jun 16, 9:50 AM EDT	Special Weather Statement	CTP	25 min
Jun 16, 10:33 AM EDT	Severe Thunderstorm Warning	CTP	42 min
Jun 24, 3:45 PM EDT	Special Weather Statement	CTP	45 min
Jun 24, 4:23 PM EDT	Special Weather Statement	CTP	37 min
Jun 26, 12:36 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	11 hr
Jun 26, 4:30 PM EDT	Mesoscale Discussion	SPC	90 min
Jun 26, 4:53 PM EDT	Severe Thunderstorm Warning	CTP	42 min
Jun 26, 7:08 PM EDT	Severe Thunderstorm Warning	CTP	52 min
Jun 26, 8:03 PM EDT	Mesoscale Discussion	SPC	87 min
Jun 26, 8:04 PM EDT	Special Weather Statement	CTP	26 min
Jun 26, 8:20 PM EDT	Severe Thunderstorm Warning	CTP	40 min
Jun 27, 1:05 PM EDT	Severe Thunderstorm Warning	CTP	70 min
Jun 27, 3:07 PM EDT	Special Weather Statement	CTP	53 min
Jun 27, 8:46 PM EDT	Special Weather Statement	CTP	29 min
Jul 2, 2:06 PM EDT	Mesoscale Discussion	SPC	114 min
Jul 2, 3:24 PM EDT	Mesoscale Discussion	SPC	96 min
Jul 2, 4:31 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 2, 8:42 PM EDT	Special Weather Statement	CTP	33 min
Jul 3, 2:55 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 4:49 PM EDT	Mesoscale Discussion	SPC	116 min
Jul 3, 4:58 PM EDT	Special Weather Statement	CTP	32 min
Jul 6, 6:05 PM EDT	Special Weather Statement	CTP	25 min
Jul 7, 11:58 AM EDT	Special Weather Statement	CTP	32 min
Jul 7, 12:28 PM EDT	Areal Flood Advisory	CTP	2 hr
Jul 7, 2:02 PM EDT	Special Weather Statement	CTP	28 min
Jul 8, 3:12 PM EDT	Flood Watch	CTP	26 hr
Jul 9, 10:28 AM EDT	Mesoscale Discussion	SPC	92 min
Jul 9, 11:06 AM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 9, 1:20 PM EDT	Mesoscale Discussion	SPC	85 min
Jul 9, 1:46 PM EDT	Areal Flood Advisory	CTP	35 min
Jul 9, 2:21 PM EDT	Flash Flood Warning	CTP	117 min
Jul 9, 2:48 PM EDT	Special Weather Statement	CTP	42 min
Jul 9, 4:18 PM EDT	Areal Flood Advisory	CTP	53 min
Jul 13, 2:36 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 14, 2:02 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 14, 6:01 PM EDT	Special Weather Statement	CTP	44 min
Jul 14, 6:16 PM EDT	Severe Thunderstorm Warning	CTP	44 min
Jul 15, 3:50 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 15, 6:44 PM EDT	Flood Watch	CTP	23 hr
Jul 19, 4:48 PM EDT	Mesoscale Discussion	SPC	87 min
Jul 19, 8:22 PM EDT	Special Weather Statement	CTP	23 min
Jul 19, 8:41 PM EDT	Severe Thunderstorm Warning	CTP	42 min
Jul 19, 9:39 PM EDT	Special Weather Statement	CTP	21 min
Jul 20, 10:28 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 12:39 AM EDT	Severe Thunderstorm Warning	CTP	51 min
Jul 21, 1:05 AM EDT	Severe Thunderstorm Warning	CTP	40 min
Jul 21, 1:17 AM EDT	Areal Flood Advisory	CTP	118 min
Jul 21, 1:48 AM EDT	Severe Thunderstorm Warning	CTP	72 min
Jul 24, 3:41 PM EDT	Special Weather Statement	CTP	34 min
Jul 25, 10:58 AM EDT	Mesoscale Discussion	SPC	2 hr
Jul 25, 12:13 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 26, 5:36 AM EDT	Heat Advisory	CTP	62 hr
Jul 27, 11:40 AM EDT	Mesoscale Discussion	SPC	2 hr
Jul 27, 3:18 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 27, 4:46 PM EDT	Mesoscale Discussion	SPC	89 min
Jul 27, 5:15 PM EDT	Severe Thunderstorm Warning	CTP	60 min
Jul 27, 6:03 PM EDT	Special Weather Statement	CTP	27 min
Jul 28, 5:40 PM EDT	Severe Thunderstorm Warning	CTP	50 min
Jul 28, 6:18 PM EDT	Special Weather Statement	CTP	27 min
Jul 28, 6:22 PM EDT	Special Weather Statement	CTP	23 min
Jul 28, 6:33 PM EDT	Mesoscale Discussion	SPC	87 min
Jul 28, 6:46 PM EDT	Special Weather Statement	CTP	59 min
Jul 29, 1:56 PM EDT	Mesoscale Discussion	SPC	64 min
Jul 29, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 29, 4:45 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 4, 12:10 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Aug 4, 5:48 PM EDT	Severe Thunderstorm Warning	CTP	42 min
Aug 4, 6:13 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 8:18 AM EDT	Mesoscale Discussion	SPC	117 min
Aug 7, 12:14 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 1:20 PM EDT	Tornado Watch	SPC	11 hr
Aug 7, 3:17 PM EDT	Mesoscale Discussion	SPC	88 min
Aug 7, 4:40 PM EDT	Severe Thunderstorm Warning	CTP	35 min
Aug 7, 4:40 PM EDT	Mesoscale Discussion	SPC	95 min
Aug 7, 5:00 PM EDT	Tornado Warning	CTP	30 min
Aug 7, 5:10 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CTP	52 min
Aug 17, 11:04 PM EDT	Mesoscale Discussion	SPC	3 hr
Sep 5, 3:00 PM EDT	Heat Advisory	CTP	28 hr
Sep 7, 11:58 AM EDT	Mesoscale Discussion	SPC	3 hr
Sep 7, 1:14 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 7, 3:06 PM EDT	Mesoscale Discussion	SPC	84 min
Sep 7, 3:20 PM EDT	Special Weather Statement	CTP	25 min
Sep 7, 3:33 PM EDT	Severe Thunderstorm Warning	CTP	42 min
Sep 7, 3:42 PM EDT	Severe Thunderstorm Warning	CTP	48 min
Sep 7, 4:22 PM EDT	Severe Thunderstorm Warning	CTP	53 min
Sep 7, 5:11 PM EDT	Severe Thunderstorm Warning	CTP	34 min
Sep 7, 5:37 PM EDT	Severe Thunderstorm Warning	CTP	23 min
Sep 7, 5:59 PM EDT	Special Weather Statement	CTP	31 min
Sep 7, 6:16 PM EDT	Severe Thunderstorm Warning	CTP	44 min
Sep 7, 6:44 PM EDT	Severe Thunderstorm Warning	CTP	73 min
Sep 8, 2:46 PM EDT	Mesoscale Discussion	SPC	119 min
Sep 8, 3:11 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 8, 6:09 PM EDT	Severe Thunderstorm Warning	CTP	35 min
Sep 8, 6:34 PM EDT	Mesoscale Discussion	SPC	86 min
Sep 8, 8:02 PM EDT	Severe Thunderstorm Warning	CTP	43 min
Sep 8, 8:51 PM EDT	Severe Thunderstorm Warning	CTP	24 min
Sep 8, 9:15 PM EDT	Severe Thunderstorm Warning	CTP	45 min
Sep 9, 2:08 PM EDT	Mesoscale Discussion	SPC	3 hr
Sep 9, 4:23 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Sep 9, 4:50 PM EDT	Special Weather Statement	CTP	25 min
Sep 9, 6:06 PM EDT	Mesoscale Discussion	SPC	114 min
Sep 9, 8:08 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 12, 3:19 PM EDT	Flood Watch	CTP	12 hr
Oct 3, 3:46 AM EDT	Dense Fog Advisory	CTP	6 hr
Oct 23, 1:30 PM EDT	Frost Advisory	CTP	20 hr
Oct 30, 3:02 AM EDT	Frost Advisory	CTP	30 hr
Oct 31, 3:36 AM EDT	Freeze Watch	CTP	23 hr
Nov 1, 2:18 AM EDT	Freeze Warning	CTP	32 hr
Dec 2, 8:05 AM EST	Dense Fog Advisory	CTP	115 min
Dec 8, 2:50 PM EST	Flood Watch	CTP	58 hr
Dec 16, 1:39 PM EST	Flood Watch	CTP	46 hr
Dec 18, 12:37 AM EST	Areal Flood Advisory	CTP	6 hr
Dec 18, 2:21 AM EST	Areal Flood Warning	CTP	14 hr
Dec 26, 3:41 AM EST	Dense Fog Advisory	CTP	8 hr
Dec 27, 9:31 PM EST	Areal Flood Advisory	CTP	3 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	32
Tornado Warning	2
Severe Thunderstorm Watch	14
Tornado Watch	1
Mesoscale Discussion	34
Special Weather Statement	30
Flooding
Areal Flood Warning	1
Flash Flood Warning	1
Flood Watch	6
Areal Flood Advisory	6
Winter
Winter Weather Advisory	1
Heat
Heat Advisory	2
Cold
Freeze Warning	3
Freeze Watch	3
Frost Advisory	6
Wind and dust
High Wind Warning	1
Wind Advisory	4
Fire
Red Flag Warning	2
Fire Weather Watch	2
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 2022 2024

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.