Alert archive / North Dakota / Steele County

Weather alerts in Steele County, North Dakota, 2009

102 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Steele County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
102
Warnings
22
Watches
16
Advisories
43
Busiest month
January21 alerts
Busiest day
June 27, 20096 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 Steele County in 2009 had a tornado report inside them.

Steele County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings2150%0
Flash flood warnings00

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Forks, ND: tornado warnings191047%2669%31 min
NWS Grand Forks, ND: severe thunderstorm warnings534123%11560%24 min
NWS Grand Forks, ND: flash flood warnings17759%1694%185 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.

IssuedProductOfficeLasted
Jan 1, 3:50 PM CSTWinter Storm WatchFGF24 hr
Jan 2, 3:43 PM CSTWinter Weather AdvisoryFGF30 hr
Jan 3, 6:29 AM CSTMesoscale DiscussionSPC4 hr
Jan 3, 3:09 PM CSTWind Chill AdvisoryFGF27 hr
Jan 4, 3:27 AM CSTWind Chill WarningFGF9 hr
Jan 7, 3:54 AM CSTWinter Storm WatchFGF31 hr
Jan 8, 11:08 AM CSTWinter Weather AdvisoryFGF31 hr
Jan 10, 2:56 PM CSTWinter Storm WatchFGF24 hr
Jan 11, 3:00 PM CSTBlizzard WarningFGF24 hr
Jan 12, 5:34 AM CSTMesoscale DiscussionSPC4 hr
Jan 12, 9:59 AM CSTWind Chill AdvisoryFGF14 hr
Jan 13, 4:13 AM CSTWind Chill AdvisoryFGF31 hr
Jan 13, 8:34 PM CSTWind Chill WarningFGF39 hr
Jan 13, 8:34 PM CSTWind Chill AdvisoryFGF14 hr
Jan 16, 10:57 PM CSTWinter Weather AdvisoryFGF10 hr
Jan 22, 5:57 AM CSTDense Fog AdvisoryFGF6 hr
Jan 22, 3:10 PM CSTWind Chill AdvisoryFGF5 days
Jan 22, 9:43 PM CSTWinter Weather AdvisoryFGF8 hr
Jan 30, 3:04 PM CSTBlizzard WatchFGF13 hr
Jan 31, 4:23 AM CSTHigh Wind WarningFGF14 hr
Jan 31, 4:23 AM CSTWind AdvisoryFGF18 hr
Feb 1, 4:08 AM CSTWind AdvisoryFGF17 hr
Feb 1, 9:23 PM CSTWind Chill AdvisoryFGF30 hr
Feb 7, 3:24 PM CSTWinter Storm WatchFGF24 hr
Feb 8, 3:44 PM CSTIce Storm WarningFGF32 hr
Feb 8, 3:44 PM CSTWinter Weather AdvisoryFGF36 hr
Feb 10, 6:16 AM CSTDense Fog AdvisoryFGF4 hr
Feb 10, 10:06 AM CSTDense Fog AdvisoryFGF4 hr
Feb 20, 3:39 AM CSTWinter Weather AdvisoryFGF17 hr
Feb 25, 2:49 PM CSTWind Chill AdvisoryFGF45 hr
Feb 26, 8:42 AM CSTWinter Weather AdvisoryFGF9 hr
Feb 27, 3:09 PM CSTWind Chill AdvisoryFGF19 hr
Mar 8, 5:13 AM CDTBlizzard WatchFGF35 hr
Mar 9, 4:24 AM CDTWinter Weather AdvisoryFGF18 hr
Mar 9, 3:56 PM CDTBlizzard WarningFGF37 hr
Mar 11, 4:48 AM CDTWind Chill AdvisoryFGF31 hr
Mar 21, 3:07 PM CDTFlood WatchFGF21 hr
Mar 22, 4:26 AM CDTWind AdvisoryFGF18 hr
Mar 22, 12:32 PM CDTAreal Flood WarningFGF3 days
Mar 24, 3:51 PM CDTWinter Storm WarningFGF21 hr
Mar 24, 3:51 PM CDTWinter Weather AdvisoryFGF21 hr
Mar 24, 8:36 PM CDTMesoscale DiscussionSPC4 hr
Mar 25, 3:09 PM CDTAreal Flood WarningFGF6 days
Mar 29, 3:27 PM CDTWinter Storm WarningFGF61 hr
Mar 29, 3:27 PM CDTWinter Weather AdvisoryFGF61 hr
Apr 3, 4:37 AM CDTDense Fog AdvisoryFGF6 hr
Apr 6, 2:04 PM CDTAreal Flood WarningFGF4 days
Apr 10, 11:08 AM CDTAreal Flood WarningFGF5 days
Apr 15, 1:54 PM CDTAreal Flood WarningFGF9 days
Apr 22, 5:19 PM CDTAreal Flood WarningFGF46 hr
Apr 23, 4:51 PM CDTWind AdvisoryFGF11 hr
Apr 24, 1:35 PM CDTAreal Flood WarningFGF3 days
May 11, 3:27 PM CDTMesoscale DiscussionSPC63 min
May 12, 8:42 PM CDTMesoscale DiscussionSPC93 min
May 13, 5:01 AM CDTWind AdvisoryFGF16 hr
May 15, 2:50 PM CDTFrost AdvisoryFGF18 hr
May 29, 2:07 PM CDTMesoscale DiscussionSPC83 min
Jun 2, 10:31 AM CDTFrost AdvisoryFGF21 hr
Jun 23, 10:35 AM CDTMesoscale DiscussionSPC115 min
Jun 23, 11:01 AM CDTSevere Thunderstorm WatchSPC7 hr
Jun 26, 6:43 PM CDTTornado WatchSPC4 hr
Jun 26, 7:45 PM CDTTornado WarningFGF60 min
Jun 26, 9:19 PM CDTMesoscale DiscussionSPC56 min
Jun 27, 12:37 PM CDTMesoscale DiscussionSPC53 min
Jun 27, 1:39 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 27, 3:16 PM CDTMesoscale DiscussionSPC59 min
Jun 27, 5:02 PM CDTMesoscale DiscussionSPC58 min
Jun 27, 7:16 PM CDTMesoscale DiscussionSPC59 min
Jul 8, 10:29 PM CDTSevere Thunderstorm Watch PDSSPC6 hr
Jul 8, 11:27 PM CDTMesoscale DiscussionSPC93 min
Jul 9, 3:07 AM CDTMesoscale DiscussionSPC83 min
Jul 23, 3:39 PM CDTMesoscale DiscussionSPC2 hr
Jul 23, 4:51 PM CDTSevere Thunderstorm WatchSPC9 hr
Jul 23, 8:46 PM CDTSevere Thunderstorm WarningFGF59 min
Jul 26, 7:01 PM CDTMesoscale DiscussionSPC89 min
Aug 2, 2:35 PM CDTMesoscale DiscussionSPC115 min
Aug 7, 11:37 AM CDTMesoscale DiscussionSPC83 min
Aug 14, 8:53 AM CDTSevere Thunderstorm WarningFGF52 min
Aug 14, 5:40 PM CDTSevere Thunderstorm WatchSPC5 hr
Aug 14, 8:37 PM CDTMesoscale DiscussionSPC53 min
Aug 27, 5:10 PM CDTMesoscale DiscussionSPC95 min
Sep 8, 1:03 PM CDTSpecial Weather StatementFGF42 min
Sep 13, 3:34 AM CDTDense Fog AdvisoryFGF6 hr
Sep 28, 4:02 AM CDTFrost AdvisoryFGF29 hr
Sep 30, 11:30 AM CDTWind AdvisoryFGF8 hr
Oct 7, 4:58 PM CDTFreeze WatchFGF11 hr
Oct 8, 4:21 AM CDTFreeze WarningFGF30 hr
Oct 14, 4:11 AM CDTWinter Weather AdvisoryFGF27 hr
Oct 28, 4:46 AM CDTWinter Storm WatchFGF31 hr
Nov 23, 7:30 AM CSTFreezing Rain AdvisoryFGF3 hr
Dec 8, 2:20 PM CSTWind Chill AdvisoryFGF22 hr
Dec 9, 12:08 PM CSTWind Chill AdvisoryFGF22 hr
Dec 10, 3:28 PM CSTWind Chill AdvisoryFGF19 hr
Dec 12, 3:12 PM CSTWind Chill AdvisoryFGF20 hr
Dec 13, 11:14 AM CSTWind Chill AdvisoryFGF24 hr
Dec 14, 2:53 PM CSTWind Chill WarningFGF21 hr
Dec 15, 11:51 AM CSTWind Chill AdvisoryFGF8 hr
Dec 16, 10:29 PM CSTFreezing Rain AdvisoryFGF5 hr
Dec 22, 3:57 AM CSTWinter Storm WatchFGF24 hr
Dec 23, 4:10 AM CSTWinter Storm WarningFGF3 days
Dec 24, 10:51 AM CSTBlizzard WarningFGF46 hr
Dec 26, 9:01 AM CSTWinter Weather AdvisoryFGF9 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20082010

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.