Alert archive / Pennsylvania / Snyder County

Weather alerts in Snyder County, Pennsylvania, 2015

144 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Snyder County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts: 144
Warnings: 32
Watches: 17
Advisories: 37
Busiest month: June39 alerts
Busiest day: June 23, 20159 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 Snyder County in 2015 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Snyder County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	1	0%
Severe thunderstorm warnings	22	16	27%	12	67%	26 min
Flash flood warnings	0			0

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS State College, PA: tornado warnings	12	1	92%	7	14%	11 min
NWS State College, PA: severe thunderstorm warnings	174	111	36%	302	78%	27 min
NWS State College, PA: flash flood warnings	17	9	47%	15	93%	47 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, 3:04 PM EST	Winter Weather Advisory	CTP	29 hr
Jan 3, 9:59 AM EST	Mesoscale Discussion	SPC	4 hr
Jan 6, 3:28 PM EST	Wind Chill Advisory	CTP	46 hr
Jan 7, 11:58 AM EST	Special Weather Statement	CTP	62 min
Jan 7, 1:04 PM EST	Special Weather Statement	CTP	26 min
Jan 9, 12:05 PM EST	Special Weather Statement	CTP	55 min
Jan 9, 1:07 PM EST	Special Weather Statement	CTP	23 min
Jan 11, 4:49 AM EST	Winter Weather Advisory	CTP	38 hr
Jan 18, 6:48 PM EST	Special Weather Statement	CTP	3 hr
Jan 18, 9:44 PM EST	Special Weather Statement	CTP	3 hr
Jan 20, 2:54 PM EST	Winter Weather Advisory	CTP	34 hr
Jan 23, 3:58 AM EST	Winter Weather Advisory	CTP	32 hr
Jan 23, 10:23 AM EST	Winter Storm Warning	CTP	25 hr
Jan 23, 11:48 PM EST	Mesoscale Discussion	SPC	6 hr
Jan 25, 5:15 AM EST	Winter Weather Advisory	CTP	50 hr
Jan 30, 3:42 PM EST	Winter Storm Watch	CTP	23 hr
Jan 31, 2:57 PM EST	Winter Storm Warning	CTP	43 hr
Feb 8, 4:23 AM EST	Winter Weather Advisory	CTP	34 hr
Feb 9, 4:09 AM EST	Freezing Rain Advisory	CTP	18 hr
Feb 12, 3:10 AM EST	Wind Chill Advisory	CTP	32 hr
Feb 12, 10:33 AM EST	Special Weather Statement	CTP	42 min
Feb 12, 11:20 AM EST	Special Weather Statement	CTP	40 min
Feb 13, 3:22 AM EST	Wind Chill Watch	CTP	24 hr
Feb 13, 2:16 PM EST	Winter Weather Advisory	CTP	41 hr
Feb 14, 3:12 AM EST	Wind Advisory	CTP	37 hr
Feb 14, 3:42 AM EST	Wind Chill Warning	CTP	54 hr
Feb 14, 5:52 PM EST	Special Weather Statement	CTP	38 min
Feb 18, 4:05 AM EST	Wind Chill Advisory	CTP	56 hr
Feb 18, 5:15 PM EST	Special Weather Statement	CTP	75 min
Feb 18, 6:16 PM EST	Special Weather Statement	CTP	89 min
Feb 20, 10:26 AM EST	Winter Storm Watch	CTP	5 hr
Feb 20, 3:10 PM EST	Winter Storm Warning	CTP	39 hr
Feb 20, 3:10 PM EST	Winter Weather Advisory	CTP	39 hr
Feb 22, 3:13 AM EST	Wind Chill Advisory	CTP	54 hr
Feb 28, 12:14 PM EST	Winter Weather Advisory	CTP	43 hr
Mar 2, 1:54 PM EST	Winter Weather Advisory	CTP	41 hr
Mar 3, 7:01 PM EST	Mesoscale Discussion	SPC	4 hr
Mar 4, 9:41 AM EST	Winter Weather Advisory	CTP	30 hr
Mar 10, 5:30 PM EDT	Dense Fog Advisory	CTP	16 hr
Mar 12, 3:57 PM EDT	Areal Flood Advisory	CTP	18 hr
Mar 19, 4:09 AM EDT	Winter Weather Advisory	CTP	38 hr
Mar 30, 4:00 PM EDT	Special Weather Statement	CTP	3 hr
Mar 30, 7:45 PM EDT	Special Weather Statement	CTP	9 hr
Apr 17, 2:39 PM EDT	Fire Weather Watch	CTP	12 hr
Apr 18, 2:54 AM EDT	Red Flag Warning	CTP	17 hr
Apr 20, 3:08 PM EDT	Tornado Watch	SPC	9 hr
Apr 20, 5:57 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 20, 8:19 PM EDT	Severe Thunderstorm Warning	CTP	56 min
Apr 20, 8:54 PM EDT	Severe Thunderstorm Warning	CTP	66 min
Apr 20, 9:17 PM EDT	Mesoscale Discussion	SPC	88 min
Apr 23, 3:35 AM EDT	Freeze Watch	CTP	10 hr
Apr 23, 3:35 AM EDT	Freeze Watch	CTP	34 hr
Apr 23, 1:21 PM EDT	Freeze Warning	CTP	18 hr
Apr 24, 2:02 PM EDT	Freeze Warning	CTP	18 hr
May 11, 11:59 PM EDT	Special Weather Statement	CTP	61 min
May 16, 1:35 PM EDT	Mesoscale Discussion	SPC	2 hr
May 16, 4:34 PM EDT	Special Weather Statement	CTP	56 min
May 16, 5:10 PM EDT	Severe Thunderstorm Warning	CTP	65 min
May 18, 3:31 PM EDT	Special Weather Statement	CTP	29 min
May 18, 7:15 PM EDT	Special Weather Statement	CTP	60 min
May 18, 8:11 PM EDT	Special Weather Statement	CTP	64 min
May 22, 2:18 AM EDT	Frost Advisory	CTP	30 hr
May 31, 12:51 PM EDT	Mesoscale Discussion	SPC	114 min
May 31, 4:25 PM EDT	Severe Thunderstorm Warning	CTP	35 min
May 31, 5:07 PM EDT	Special Weather Statement	CTP	23 min
May 31, 5:35 PM EDT	Special Weather Statement	CTP	25 min
Jun 8, 1:31 PM EDT	Mesoscale Discussion	SPC	119 min
Jun 8, 1:41 PM EDT	Special Weather Statement	CTP	34 min
Jun 8, 2:00 PM EDT	Severe Thunderstorm Warning	CTP	45 min
Jun 8, 2:34 PM EDT	Tornado Watch	SPC	5 hr
Jun 8, 2:42 PM EDT	Severe Thunderstorm Warning	CTP	48 min
Jun 8, 3:20 PM EDT	Mesoscale Discussion	SPC	85 min
Jun 8, 3:42 PM EDT	Severe Thunderstorm Warning	CTP	63 min
Jun 8, 4:18 PM EDT	Severe Thunderstorm Warning	CTP	72 min
Jun 11, 2:47 PM EDT	Mesoscale Discussion	SPC	118 min
Jun 11, 4:41 PM EDT	Special Weather Statement	CTP	34 min
Jun 11, 4:59 PM EDT	Severe Thunderstorm Warning	CTP	61 min
Jun 11, 7:13 PM EDT	Severe Thunderstorm Warning	CTP	62 min
Jun 11, 7:35 PM EDT	Severe Thunderstorm Warning	CTP	70 min
Jun 11, 8:49 PM EDT	Areal Flood Advisory	CTP	71 min
Jun 12, 2:03 PM EDT	Mesoscale Discussion	SPC	87 min
Jun 12, 3:47 PM EDT	Special Weather Statement	CTP	28 min
Jun 12, 4:12 PM EDT	Severe Thunderstorm Warning	CTP	45 min
Jun 12, 7:25 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 12, 7:42 PM EDT	Severe Thunderstorm Warning	CTP	63 min
Jun 12, 8:43 PM EDT	Severe Thunderstorm Warning	CTP	77 min
Jun 14, 4:31 PM EDT	Special Weather Statement	CTP	59 min
Jun 14, 5:16 PM EDT	Special Weather Statement	CTP	74 min
Jun 23, 6:08 AM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 23, 8:00 AM EDT	Special Weather Statement	CTP	60 min
Jun 23, 8:39 AM EDT	Mesoscale Discussion	SPC	96 min
Jun 23, 9:37 AM EDT	Severe Thunderstorm Warning	CTP	53 min
Jun 23, 10:20 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 23, 12:23 PM EDT	Severe Thunderstorm Warning	CTP	37 min
Jun 23, 12:50 PM EDT	Severe Thunderstorm Warning	CTP	55 min
Jun 23, 1:25 PM EDT	Special Weather Statement	CTP	35 min
Jun 23, 1:37 PM EDT	Severe Thunderstorm Warning	CTP	38 min
Jun 26, 3:55 AM EDT	Flood Watch	CTP	44 hr
Jun 30, 12:31 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 30, 1:21 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 30, 3:07 PM EDT	Severe Thunderstorm Warning	CTP	53 min
Jun 30, 3:28 PM EDT	Tornado Warning	CTP	47 min
Jun 30, 4:42 PM EDT	Areal Flood Advisory	CTP	3 hr
Jun 30, 7:38 PM EDT	Mesoscale Discussion	SPC	67 min
Jun 30, 7:57 PM EDT	Special Weather Statement	CTP	63 min
Jun 30, 9:00 PM EDT	Severe Thunderstorm Warning	CTP	60 min
Jul 4, 11:08 AM EDT	Areal Flood Advisory	CTP	3 hr
Jul 5, 3:57 AM EDT	Dense Fog Advisory	CTP	5 hr
Jul 6, 7:02 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 9, 12:59 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 9, 1:27 PM EDT	Tornado Watch	SPC	6 hr
Jul 9, 3:09 PM EDT	Mesoscale Discussion	SPC	96 min
Jul 9, 4:23 PM EDT	Special Weather Statement	CTP	37 min
Jul 9, 4:55 PM EDT	Mesoscale Discussion	SPC	95 min
Jul 14, 11:32 PM EDT	Areal Flood Advisory	CTP	3 hr
Jul 18, 3:54 AM EDT	Special Weather Statement	CTP	36 min
Jul 18, 4:30 AM EDT	Special Weather Statement	CTP	45 min
Jul 18, 7:21 PM EDT	Severe Thunderstorm Warning	CTP	39 min
Jul 21, 12:53 PM EDT	Mesoscale Discussion	SPC	67 min
Jul 26, 7:47 PM EDT	Special Weather Statement	CTP	58 min
Aug 20, 11:49 AM EDT	Mesoscale Discussion	SPC	2 hr
Aug 20, 12:05 PM EDT	Special Weather Statement	CTP	85 min
Aug 20, 3:45 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 20, 3:56 PM EDT	Special Weather Statement	CTP	79 min
Aug 20, 5:19 PM EDT	Severe Thunderstorm Warning	CTP	56 min
Aug 23, 7:23 AM EDT	Special Weather Statement	CTP	82 min
Sep 1, 8:51 AM EDT	Special Weather Statement	CTP	114 min
Sep 4, 8:48 AM EDT	Special Weather Statement	CTP	117 min
Sep 6, 6:48 AM EDT	Special Weather Statement	CTP	3 hr
Sep 29, 4:19 AM EDT	Flash Flood Watch	CTP	24 hr
Oct 16, 1:49 PM EDT	Freeze Watch	CTP	14 hr
Oct 16, 1:49 PM EDT	Freeze Watch	CTP	38 hr
Oct 17, 3:45 AM EDT	Freeze Warning	CTP	29 hr
Oct 18, 3:26 AM EDT	Freeze Warning	CTP	30 hr
Nov 13, 9:51 AM EST	Wind Advisory	CTP	8 hr
Dec 6, 11:07 AM EST	Dense Fog Advisory	CTP	114 min
Dec 6, 7:44 PM EST	Dense Fog Advisory	CTP	16 hr
Dec 7, 8:40 PM EST	Dense Fog Advisory	CTP	17 hr
Dec 9, 1:34 AM EST	Freezing Fog Advisory	CTP	10 hr
Dec 10, 5:35 AM EST	Dense Fog Advisory	CTP	4 hr
Dec 10, 10:03 AM EST	Dense Fog Advisory	CTP	117 min
Dec 22, 9:30 PM EST	Dense Fog Advisory	CTP	15 hr
Dec 25, 7:40 AM EST	Dense Fog Advisory	CTP	4 hr
Dec 28, 3:44 AM EST	Winter Weather Advisory	CTP	30 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	22
Tornado Warning	1
Severe Thunderstorm Watch	4
Tornado Watch	3
Mesoscale Discussion	20
Special Weather Statement	38
Flooding
Flash Flood Watch	1
Flood Watch	1
Areal Flood Advisory	6
Winter
Winter Storm Warning	3
Winter Storm Watch	2
Freezing Rain Advisory	1
Winter Weather Advisory	13
Cold
Freeze Warning	4
Wind Chill Warning	1
Freeze Watch	4
Wind Chill Watch	1
Frost Advisory	1
Wind Chill Advisory	4
Wind and dust
Wind Advisory	2
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	9
Freezing Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

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.