Weather alerts in Nemaha County, Kansas, 2008

151 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Nemaha County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts: 151
Warnings: 31
Watches: 29
Advisories: 36
Busiest month: June46 alerts
Busiest day: May 22, 20087 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 3 tornado warnings covering Nemaha County in 2008 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 15 minutes after it went out.

Nemaha County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	2	33%	1	100%	15 min
Severe thunderstorm warnings	16	10	38%	12	67%	18 min
Flash flood warnings	4	0	100%	1	0%

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Topeka, KS: tornado warnings	34	21	38%	42	90%	17 min
NWS Topeka, KS: severe thunderstorm warnings	256	162	37%	457	87%	21 min
NWS Topeka, KS: flash flood warnings	42	18	57%	35	74%	48 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 15, 3:21 PM CST	Snow Advisory	TOP	36 hr
Jan 21, 2:15 PM CST	Winter Weather Advisory	TOP	7 hr
Jan 28, 9:58 PM CST	Wind Advisory	TOP	17 hr
Jan 29, 7:39 AM CST	Mesoscale Discussion	SPC	5 hr
Jan 30, 4:17 AM CST	Snow and Blowing Snow Advisory	TOP	34 hr
Feb 3, 9:37 PM CST	Dense Fog Advisory	TOP	6 hr
Feb 4, 3:56 AM CST	Winter Storm Watch	TOP	24 hr
Feb 5, 3:59 AM CST	Winter Storm Warning	TOP	30 hr
Feb 5, 7:07 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 5, 5:26 PM CST	Mesoscale Discussion	SPC	5 hr
Feb 6, 12:30 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 15, 3:18 PM CST	Winter Storm Watch	TOP	24 hr
Feb 16, 3:02 PM CST	Snow and Blowing Snow Advisory	TOP	5 hr
Feb 16, 5:54 PM CST	Wind Advisory	TOP	24 hr
Feb 16, 7:49 PM CST	Winter Weather Advisory	TOP	16 hr
Feb 19, 3:19 PM CST	Wind Chill Advisory	TOP	19 hr
Mar 2, 4:39 AM CST	Winter Weather Advisory	TOP	20 hr
Mar 2, 2:31 PM CST	Mesoscale Discussion	SPC	104 min
Mar 2, 6:55 PM CST	Mesoscale Discussion	SPC	6 hr
Mar 30, 9:51 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 30, 11:20 PM CDT	Mesoscale Discussion	SPC	55 min
Mar 31, 1:45 AM CDT	Mesoscale Discussion	SPC	2 hr
Mar 31, 3:27 AM CDT	Severe Thunderstorm Warning	TOP	33 min
Mar 31, 5:59 AM CDT	Mesoscale Discussion	SPC	91 min
Apr 10, 2:03 PM CDT	Mesoscale Discussion	SPC	117 min
Apr 10, 2:28 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 10, 6:44 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 14, 3:39 PM CDT	Wind Advisory	TOP	48 hr
Apr 17, 4:07 AM CDT	Flood Watch	TOP	10 hr
Apr 21, 7:03 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 21, 10:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 24, 10:20 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 24, 11:55 PM CDT	Mesoscale Discussion	SPC	65 min
Apr 25, 12:55 AM CDT	Mesoscale Discussion	SPC	35 min
Apr 25, 1:13 AM CDT	Tornado Watch	SPC	5 hr
Apr 25, 3:18 AM CDT	Mesoscale Discussion	SPC	57 min
Apr 25, 3:50 AM CDT	Severe Thunderstorm Warning	TOP	40 min
May 1, 11:47 AM CDT	Wind Advisory	TOP	4 hr
May 3, 3:37 PM CDT	Frost Advisory	TOP	17 hr
May 6, 9:59 PM CDT	Mesoscale Discussion	SPC	61 min
May 9, 9:02 PM CDT	River Flood Warning	TOP	116 min
May 10, 3:28 AM CDT	Wind Advisory	TOP	28 hr
May 22, 3:38 AM CDT	Mesoscale Discussion	SPC	97 min
May 22, 9:06 AM CDT	Flash Flood Warning	TOP	3 hr
May 22, 10:18 AM CDT	Areal Flood Advisory	TOP	13 days
May 22, 11:14 AM CDT	Areal Flood Warning	TOP	15 days
May 22, 11:58 AM CDT	Areal Flood Warning	TOP	18 days
May 22, 1:24 PM CDT	River Flood Warning	TOP	3 hr
May 22, 3:14 PM CDT	Areal Flood Warning	TOP	33 days
May 25, 4:10 AM CDT	Flash Flood Watch	TOP	19 hr
May 25, 2:23 PM CDT	Mesoscale Discussion	SPC	67 min
May 25, 3:00 PM CDT	Tornado Watch	SPC	6 hr
May 25, 8:07 PM CDT	Mesoscale Discussion	SPC	113 min
May 29, 5:55 PM CDT	Mesoscale Discussion	SPC	35 min
May 29, 6:43 PM CDT	Tornado Watch	SPC	7 hr
May 29, 11:34 PM CDT	Mesoscale Discussion	SPC	56 min
May 30, 1:37 AM CDT	Mesoscale Discussion	SPC	53 min
Jun 2, 7:22 AM CDT	Mesoscale Discussion	SPC	53 min
Jun 2, 7:49 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 3, 10:43 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 5, 3:02 AM CDT	Wind Advisory	TOP	16 hr
Jun 5, 1:41 PM CDT	Flash Flood Watch	TOP	11 hr
Jun 5, 4:38 PM CDT	Mesoscale Discussion	SPC	37 min
Jun 5, 4:50 PM CDT	Tornado Watch PDS	SPC	7 hr
Jun 5, 6:04 PM CDT	Severe Thunderstorm Warning	TOP	26 min
Jun 5, 6:22 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 5, 6:28 PM CDT	Tornado Warning	TOP	47 min
Jun 5, 7:02 PM CDT	Flash Flood Warning	TOP	3 hr
Jun 5, 7:04 PM CDT	Tornado Warning	TOP	26 min
Jun 5, 8:17 PM CDT	Severe Thunderstorm Warning	TOP	43 min
Jun 5, 8:52 PM CDT	Severe Thunderstorm Warning	TOP	38 min
Jun 8, 6:39 AM CDT	Mesoscale Discussion	SPC	66 min
Jun 8, 12:28 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 8, 1:34 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 8, 2:21 PM CDT	Severe Thunderstorm Warning	TOP	39 min
Jun 10, 10:05 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 11, 3:49 AM CDT	Wind Advisory	TOP	16 hr
Jun 11, 3:09 PM CDT	Flash Flood Watch	TOP	11 hr
Jun 11, 3:37 PM CDT	Tornado Watch	SPC	6 hr
Jun 11, 7:18 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 11, 8:57 PM CDT	Mesoscale Discussion	SPC	93 min
Jun 11, 9:46 PM CDT	Tornado Watch	SPC	5 hr
Jun 11, 11:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 11:50 PM CDT	Tornado Warning	TOP	37 min
Jun 15, 8:44 AM CDT	Mesoscale Discussion	SPC	91 min
Jun 15, 9:09 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 15, 10:22 AM CDT	Severe Thunderstorm Warning	TOP	53 min
Jun 15, 11:09 AM CDT	Severe Thunderstorm Warning	TOP	51 min
Jun 15, 1:16 PM CDT	Mesoscale Discussion	SPC	119 min
Jun 19, 1:14 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 19, 1:27 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Jun 19, 6:11 PM CDT	Mesoscale Discussion	SPC	64 min
Jun 19, 8:32 PM CDT	Mesoscale Discussion	SPC	58 min
Jun 24, 2:02 AM CDT	Mesoscale Discussion	SPC	88 min
Jun 24, 3:00 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 26, 2:21 PM CDT	Severe Thunderstorm Warning	TOP	39 min
Jun 26, 2:58 PM CDT	Severe Thunderstorm Warning	TOP	47 min
Jun 26, 3:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 26, 4:50 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 26, 4:52 PM CDT	Severe Thunderstorm Warning	TOP	38 min
Jun 26, 5:26 PM CDT	Severe Thunderstorm Warning	TOP	49 min
Jun 27, 1:37 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 27, 4:04 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 2, 5:59 PM CDT	Mesoscale Discussion	SPC	61 min
Jul 2, 6:16 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 9, 3:36 AM CDT	Dense Fog Advisory	TOP	5 hr
Jul 11, 10:31 PM CDT	Mesoscale Discussion	SPC	89 min
Jul 17, 6:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 17, 11:05 PM CDT	Flash Flood Warning	TOP	4 hr
Jul 21, 1:48 PM CDT	Mesoscale Discussion	SPC	87 min
Jul 21, 5:48 PM CDT	Severe Thunderstorm Warning	TOP	42 min
Jul 21, 6:38 PM CDT	Areal Flood Advisory	TOP	67 min
Jul 21, 7:19 PM CDT	Flash Flood Warning	TOP	3 hr
Jul 24, 3:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 24, 5:00 PM CDT	Tornado Watch	SPC	6 hr
Jul 24, 6:52 PM CDT	Severe Thunderstorm Warning	TOP	38 min
Jul 24, 7:49 PM CDT	Mesoscale Discussion	SPC	86 min
Jul 24, 7:52 PM CDT	Areal Flood Advisory	TOP	113 min
Jul 24, 8:31 PM CDT	Areal Flood Advisory	TOP	119 min
Jul 26, 1:12 PM CDT	Mesoscale Discussion	SPC	63 min
Jul 26, 2:13 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 26, 7:38 PM CDT	Mesoscale Discussion	SPC	67 min
Jul 31, 12:55 AM CDT	Dense Fog Advisory	TOP	8 hr
Jul 31, 3:52 PM CDT	Heat Advisory	TOP	4 days
Aug 14, 10:06 AM CDT	Areal Flood Advisory	TOP	114 min
Aug 28, 3:22 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 8, 5:17 AM CDT	Mesoscale Discussion	SPC	2 hr
Sep 11, 3:41 AM CDT	Flood Watch	TOP	71 hr
Sep 24, 1:32 AM CDT	Mesoscale Discussion	SPC	88 min
Oct 15, 3:06 PM CDT	Frost Advisory	TOP	18 hr
Oct 25, 3:31 AM CDT	Freeze Watch	TOP	36 hr
Oct 26, 3:30 PM CDT	Freeze Warning	TOP	18 hr
Oct 26, 3:30 PM CDT	Wind Advisory	TOP	4 hr
Nov 5, 4:00 AM CST	Wind Advisory	TOP	10 hr
Nov 5, 2:55 PM CST	Mesoscale Discussion	SPC	65 min
Nov 5, 5:06 PM CST	Severe Thunderstorm Watch	SPC	4 hr
Nov 5, 5:22 PM CST	Severe Thunderstorm Warning	TOP	38 min
Nov 5, 6:00 PM CST	Severe Thunderstorm Warning	TOP	30 min
Nov 5, 7:08 PM CST	Mesoscale Discussion	SPC	97 min
Nov 6, 3:56 AM CST	Wind Advisory	TOP	13 hr
Dec 8, 4:16 PM CST	Winter Weather Advisory	TOP	26 hr
Dec 12, 3:27 PM CST	Wind Advisory	TOP	45 hr
Dec 14, 2:22 PM CST	Wind Chill Advisory	TOP	20 hr
Dec 15, 3:44 PM CST	Winter Weather Advisory	TOP	24 hr
Dec 17, 3:51 PM CST	Freezing Rain Advisory	TOP	35 hr
Dec 18, 4:11 AM CST	Ice Storm Warning	TOP	23 hr
Dec 18, 11:35 AM CST	Mesoscale Discussion	SPC	6 hr
Dec 18, 6:46 PM CST	Mesoscale Discussion	SPC	6 hr
Dec 20, 3:22 PM CST	Wind Chill Advisory	TOP	21 hr
Dec 23, 4:04 AM CST	Winter Weather Advisory	TOP	26 hr
Dec 27, 5:59 AM CST	Freezing Rain Advisory	TOP	4 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	3
Severe Thunderstorm Watch	14
Tornado Watch	7
Mesoscale Discussion	55
Flooding
Areal Flood Warning	3
Flash Flood Warning	4
River Flood Warning	2
Flash Flood Watch	3
Flood Watch	2
Areal Flood Advisory	5
Winter
Ice Storm Warning	1
Winter Storm Warning	1
Winter Storm Watch	2
Freezing Rain Advisory	2
Snow Advisory	1
Snow and Blowing Snow Advisory	2
Winter Weather Advisory	6
Heat
Heat Advisory	1
Cold
Freeze Warning	1
Freeze Watch	1
Frost Advisory	2
Wind Chill Advisory	3
Wind and dust
Wind Advisory	11
Fog and smoke
Dense Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2007 2009

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.