Alert archive / Pennsylvania / Columbia County

Weather alerts in Columbia County, Pennsylvania, 2018

159 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Columbia County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts: 159
Warnings: 40
Watches: 23
Advisories: 53
Busiest month: August31 alerts
Busiest day: October 2, 201810 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 3 tornado warnings covering Columbia County in 2018 had a tornado report inside them.

Columbia County, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	0	100%	0
Severe thunderstorm warnings	10	7	30%	8	75%	49 min
Flash flood warnings	8	5	38%	4	100%	196 min

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS State College, PA: tornado warnings	22	5	77%	10	50%	7 min
NWS State College, PA: severe thunderstorm warnings	122	81	34%	244	80%	30 min
NWS State College, PA: flash flood warnings	57	36	37%	89	88%	96 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 4, 3:46 AM EST	Wind Chill Advisory	CTP	3 days
Jan 10, 3:07 PM EST	Winter Storm Watch	CTP	38 hr
Jan 11, 4:34 AM EST	Flood Watch	CTP	51 hr
Jan 12, 4:46 AM EST	Winter Weather Advisory	CTP	29 hr
Jan 12, 7:24 PM EST	Areal Flood Advisory	CTP	3 hr
Jan 13, 12:56 AM EST	Mesoscale Discussion	SPC	6 hr
Jan 15, 2:22 PM EST	Winter Weather Advisory	CTP	41 hr
Feb 3, 2:44 PM EST	Winter Weather Advisory	CTP	42 hr
Feb 4, 6:32 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 5, 2:40 PM EST	Winter Storm Watch	CTP	24 hr
Feb 6, 2:41 PM EST	Winter Storm Warning	CTP	27 hr
Feb 7, 5:28 AM EST	Mesoscale Discussion	SPC	5 hr
Feb 7, 11:25 AM EST	Mesoscale Discussion	SPC	6 hr
Feb 11, 12:01 AM EST	Dense Fog Advisory	CTP	10 hr
Feb 11, 6:40 PM EST	Dense Fog Advisory	CTP	5 hr
Feb 16, 7:14 PM EST	Winter Weather Advisory	CTP	33 hr
Feb 20, 12:33 AM EST	Dense Fog Advisory	CTP	9 hr
Feb 22, 11:29 AM EST	Flood Watch	CTP	68 hr
Feb 24, 4:12 AM EST	Dense Fog Advisory	CTP	6 hr
Mar 1, 3:48 PM EST	Winter Storm Watch	CTP	8 hr
Mar 1, 3:48 PM EST	Winter Weather Advisory	CTP	23 hr
Mar 1, 4:03 PM EST	Wind Advisory	CTP	33 hr
Mar 5, 2:17 PM EST	Winter Storm Watch	CTP	22 hr
Mar 6, 11:59 AM EST	Winter Storm Warning	CTP	27 hr
Mar 6, 4:21 PM EST	Winter Weather Advisory	CTP	22 hr
Mar 20, 4:36 AM EDT	Winter Weather Advisory	CTP	39 hr
Mar 29, 2:28 AM EDT	Dense Fog Advisory	CTP	8 hr
Apr 1, 4:17 AM EDT	Winter Weather Advisory	CTP	29 hr
Apr 2, 3:47 AM EDT	Mesoscale Discussion	SPC	6 hr
Apr 3, 3:25 PM EDT	Wind Advisory	CTP	12 hr
Apr 4, 3:36 AM EDT	High Wind Warning	CTP	16 hr
Apr 17, 5:45 PM EDT	Special Weather Statement	CTP	60 min
May 2, 4:45 AM EDT	Red Flag Warning	CTP	16 hr
May 3, 4:24 PM EDT	Special Weather Statement	CTP	36 min
May 3, 4:27 PM EDT	Severe Thunderstorm Warning	CTP	33 min
May 4, 6:20 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
May 4, 8:12 PM EDT	Special Weather Statement	CTP	78 min
May 4, 8:23 PM EDT	Mesoscale Discussion	SPC	67 min
May 4, 8:50 PM EDT	Mesoscale Discussion	SPC	85 min
May 7, 1:15 AM EDT	Dense Fog Advisory	CTP	8 hr
May 10, 4:23 PM EDT	Mesoscale Discussion	SPC	97 min
May 15, 11:43 AM EDT	Mesoscale Discussion	SPC	3 hr
May 15, 12:26 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 15, 2:14 PM EDT	Mesoscale Discussion	SPC	2 hr
May 15, 2:16 PM EDT	Severe Thunderstorm Warning	CTP	74 min
May 15, 2:48 PM EDT	Tornado Warning	CTP	42 min
May 15, 3:14 PM EDT	Severe Thunderstorm Warning	CTP	46 min
Jun 13, 6:33 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 13, 8:22 PM EDT	Severe Thunderstorm Warning	CTP	68 min
Jun 13, 8:43 PM EDT	Mesoscale Discussion	SPC	62 min
Jun 17, 2:14 PM EDT	Heat Advisory	CTP	30 hr
Jun 18, 1:32 PM EDT	Special Weather Statement	CTP	58 min
Jun 18, 1:51 PM EDT	Severe Thunderstorm Warning	CTP	54 min
Jun 18, 2:45 PM EDT	Areal Flood Advisory	CTP	2 hr
Jun 18, 5:37 PM EDT	Special Weather Statement	CTP	23 min
Jun 27, 11:32 PM EDT	Special Weather Statement	CTP	43 min
Jun 29, 2:28 PM EDT	Heat Advisory	CTP	4 days
Jul 4, 9:54 AM EDT	Flash Flood Watch	CTP	10 hr
Jul 4, 1:08 PM EDT	Areal Flood Advisory	CTP	112 min
Jul 4, 1:28 PM EDT	Flash Flood Warning	CTP	3 hr
Jul 5, 4:17 AM EDT	Flash Flood Watch	CTP	30 hr
Jul 17, 9:29 AM EDT	Special Weather Statement	CTP	46 min
Jul 21, 4:40 AM EDT	Flash Flood Watch	CTP	23 hr
Jul 23, 3:59 AM EDT	Flash Flood Watch	CTP	4 days
Jul 23, 4:48 AM EDT	Areal Flood Advisory	CTP	3 hr
Jul 23, 4:52 AM EDT	Special Weather Statement	CTP	38 min
Jul 23, 5:44 AM EDT	Flash Flood Warning	CTP	3 hr
Jul 23, 8:06 AM EDT	Areal Flood Warning	CTP	6 hr
Jul 23, 2:40 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 23, 10:39 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 24, 5:50 AM EDT	Areal Flood Advisory	CTP	3 hr
Jul 24, 4:25 PM EDT	Areal Flood Advisory	CTP	2 hr
Jul 24, 5:20 PM EDT	Areal Flood Advisory	CTP	115 min
Jul 24, 5:58 PM EDT	Areal Flood Warning	CTP	48 hr
Jul 25, 1:35 AM EDT	Flash Flood Warning	CTP	5 hr
Jul 25, 10:20 AM EDT	River Flood Warning	CTP	57 hr
Jul 25, 10:20 AM EDT	River Flood Warning	CTP	61 hr
Jul 25, 5:27 PM EDT	Flash Flood Warning	CTP	4 hr
Jul 27, 3:55 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 27, 4:50 PM EDT	Mesoscale Discussion	SPC	55 min
Aug 1, 4:06 AM EDT	Flash Flood Watch	CTP	3 days
Aug 1, 3:15 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 3, 3:19 AM EDT	Areal Flood Advisory	CTP	3 hr
Aug 3, 6:26 AM EDT	Areal Flood Advisory	CTP	3 hr
Aug 3, 1:57 PM EDT	Special Weather Statement	CTP	33 min
Aug 3, 5:05 PM EDT	Areal Flood Advisory	CTP	115 min
Aug 7, 1:52 PM EDT	Severe Thunderstorm Warning	CTP	53 min
Aug 7, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	77 min
Aug 8, 3:41 PM EDT	Special Weather Statement	CTP	49 min
Aug 8, 4:56 PM EDT	Areal Flood Advisory	CTP	3 hr
Aug 11, 5:47 AM EDT	Areal Flood Advisory	CTP	118 min
Aug 11, 10:54 AM EDT	Flash Flood Watch	CTP	8 hr
Aug 11, 11:23 AM EDT	Areal Flood Advisory	CTP	3 hr
Aug 11, 12:14 PM EDT	Areal Flood Advisory	CTP	3 hr
Aug 13, 1:46 AM EDT	Flash Flood Watch	CTP	43 hr
Aug 13, 4:17 AM EDT	Flash Flood Warning	CTP	9 hr
Aug 13, 6:31 AM EDT	Flash Flood Warning	CTP	6 hr
Aug 13, 7:04 AM EDT	Flash Flood Warning	CTP	6 hr
Aug 13, 10:39 AM EDT	Areal Flood Warning	CTP	6 hr
Aug 13, 12:51 PM EDT	Areal Flood Warning	CTP	6 hr
Aug 13, 4:32 PM EDT	Areal Flood Warning	CTP	3 hr
Aug 13, 6:45 PM EDT	Areal Flood Warning	CTP	12 hr
Aug 13, 7:29 PM EDT	Areal Flood Warning	CTP	3 hr
Aug 13, 10:22 PM EDT	Areal Flood Warning	CTP	9 hr
Aug 14, 9:47 AM EDT	River Flood Warning	CTP	55 hr
Aug 14, 9:47 AM EDT	River Flood Warning	CTP	56 hr
Aug 14, 2:11 PM EDT	Areal Flood Advisory	CTP	3 hr
Aug 17, 6:22 AM EDT	Special Weather Statement	CTP	53 min
Aug 17, 2:42 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 17, 3:44 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 27, 4:25 AM EDT	Heat Advisory	CTP	64 hr
Sep 3, 7:00 PM EDT	Severe Thunderstorm Warning	CTP	45 min
Sep 3, 7:45 PM EDT	Special Weather Statement	CTP	45 min
Sep 6, 1:20 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 6, 2:55 PM EDT	Special Weather Statement	CTP	35 min
Sep 6, 3:15 PM EDT	Areal Flood Advisory	CTP	2 hr
Sep 6, 3:31 PM EDT	Special Weather Statement	CTP	44 min
Sep 6, 4:11 PM EDT	Areal Flood Advisory	CTP	2 hr
Sep 6, 4:18 PM EDT	Special Weather Statement	CTP	42 min
Sep 8, 3:33 AM EDT	Flood Watch	CTP	64 hr
Sep 10, 2:28 PM EDT	Areal Flood Advisory	CTP	5 hr
Sep 16, 7:11 AM EDT	Dense Fog Advisory	CTP	3 hr
Sep 17, 4:51 AM EDT	Flash Flood Watch	CTP	31 hr
Sep 18, 5:41 AM EDT	Areal Flood Advisory	CTP	3 hr
Sep 18, 8:57 AM EDT	Areal Flood Advisory	CTP	2 hr
Sep 21, 10:46 PM EDT	Areal Flood Advisory	CTP	3 hr
Sep 26, 2:48 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 26, 4:41 PM EDT	Areal Flood Advisory	CTP	3 hr
Oct 2, 1:12 PM EDT	Flash Flood Watch	CTP	9 hr
Oct 2, 2:26 PM EDT	Mesoscale Discussion	SPC	2 hr
Oct 2, 2:55 PM EDT	Tornado Watch	SPC	8 hr
Oct 2, 3:48 PM EDT	Severe Thunderstorm Warning	CTP	57 min
Oct 2, 3:51 PM EDT	Tornado Warning	CTP	54 min
Oct 2, 4:26 PM EDT	Tornado Warning	CTP	49 min
Oct 2, 4:43 PM EDT	Mesoscale Discussion	SPC	2 hr
Oct 2, 6:39 PM EDT	Severe Thunderstorm Warning	CTP	21 min
Oct 2, 7:24 PM EDT	Mesoscale Discussion	SPC	81 min
Oct 2, 7:53 PM EDT	Flash Flood Warning	CTP	3 hr
Oct 2, 8:10 PM EDT	Areal Flood Advisory	CTP	2 hr
Oct 8, 4:53 AM EDT	Areal Flood Advisory	CTP	3 hr
Oct 11, 10:07 AM EDT	Areal Flood Advisory	CTP	3 hr
Oct 11, 11:22 AM EDT	Areal Flood Advisory	CTP	3 hr
Oct 13, 1:13 PM EDT	Frost Advisory	CTP	19 hr
Oct 17, 2:28 PM EDT	Freeze Watch	CTP	13 hr
Oct 18, 3:14 AM EDT	Freeze Warning	CTP	30 hr
Nov 2, 6:19 AM EDT	Special Weather Statement	CTP	26 min
Nov 2, 6:51 AM EDT	Special Weather Statement	CTP	24 min
Nov 2, 7:17 AM EDT	Special Weather Statement	CTP	28 min
Nov 2, 8:40 PM EDT	Areal Flood Advisory	CTP	3 hr
Nov 10, 8:05 AM EST	Snow Squall Warning	CTP	55 min
Nov 14, 3:40 PM EST	Winter Storm Warning	CTP	38 hr
Nov 15, 9:56 AM EST	Mesoscale Discussion	SPC	6 hr
Nov 15, 4:39 PM EST	Mesoscale Discussion	SPC	6 hr
Nov 15, 10:06 PM EST	Mesoscale Discussion	SPC	6 hr
Nov 16, 3:56 AM EST	Mesoscale Discussion	SPC	6 hr
Nov 23, 11:02 AM EST	Winter Weather Advisory	CTP	27 hr
Nov 24, 10:08 AM EST	Mesoscale Discussion	SPC	5 hr
Dec 2, 7:37 PM EST	Dense Fog Advisory	CTP	8 hr
Dec 19, 3:49 AM EST	Flood Watch	CTP	69 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	10
Tornado Warning	3
Severe Thunderstorm Watch	4
Tornado Watch	1
Mesoscale Discussion	25
Special Weather Statement	18
Flooding
Areal Flood Warning	8
Flash Flood Warning	8
River Flood Warning	4
Flash Flood Watch	9
Flood Watch	4
Areal Flood Advisory	29
Winter
Snow Squall Warning	1
Winter Storm Warning	3
Winter Storm Watch	4
Winter Weather Advisory	9
Heat
Heat Advisory	3
Cold
Freeze Warning	1
Freeze Watch	1
Frost Advisory	1
Wind Chill Advisory	1
Wind and dust
High Wind Warning	1
Wind Advisory	2
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	8

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2017 2019

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.