Alert archive / Oklahoma / Creek County

Weather alerts in Creek County, Oklahoma, 2009

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

Creek County and its neighbors

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

Alerts
278
Warnings
84
Watches
49
Advisories
44
Busiest month
March44 alerts
Busiest day
March 24, 200915 alerts

Over time

By month

Warning verification

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

Creek County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings592459%1794%27 min
Flash flood warnings4250%10%

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Tulsa, OK: tornado warnings39685%1644%21 min
NWS Tulsa, OK: severe thunderstorm warnings52623156%45786%31 min
NWS Tulsa, OK: flash flood warnings603837%13283%186 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 2, 9:51 PM CSTDense Fog AdvisoryTSA10 hr
Jan 12, 6:43 PM CSTWind AdvisoryTSA5 hr
Jan 21, 12:45 PM CSTFire Weather WatchTSA16 hr
Jan 22, 4:24 AM CSTRed Flag WarningTSA16 hr
Jan 24, 4:03 PM CSTWinter Storm WatchTSA37 hr
Jan 26, 4:41 AM CSTWinter Storm WarningTSA40 hr
Jan 26, 10:54 AM CSTMesoscale DiscussionSPC4 hr
Jan 27, 2:55 AM CSTMesoscale DiscussionSPC5 hr
Jan 27, 5:24 PM CSTWinter Weather AdvisoryTSA3 hr
Jan 31, 1:28 PM CSTRed Flag WarningTSA5 hr
Feb 6, 3:06 AM CSTWind AdvisoryTSA15 hr
Feb 8, 3:47 AM CSTFire Weather WatchTSA24 hr
Feb 8, 2:29 PM CSTWind AdvisoryTSA28 hr
Feb 9, 3:57 AM CSTRed Flag WarningTSA14 hr
Feb 9, 5:36 AM CSTSpecial Weather StatementTSA54 min
Feb 10, 12:17 PM CSTMesoscale DiscussionSPC118 min
Feb 10, 2:42 PM CSTTornado WatchSPC7 hr
Feb 10, 2:46 PM CSTFlood WatchTSA13 hr
Feb 10, 6:13 PM CSTMesoscale DiscussionSPC92 min
Feb 10, 6:44 PM CSTSevere Thunderstorm WarningTSA78 min
Feb 10, 7:11 PM CSTSevere Thunderstorm WarningTSA64 min
Feb 10, 7:37 PM CSTAreal Flood AdvisoryTSA53 min
Feb 11, 6:24 AM CSTWind AdvisoryTSA7 hr
Feb 20, 2:28 PM CSTRed Flag WarningTSA4 hr
Feb 21, 1:17 AM CSTWind AdvisoryTSA7 hr
Mar 4, 5:31 PM CSTFire Weather WatchTSA16 hr
Mar 5, 9:57 AM CSTRed Flag WarningTSA10 hr
Mar 9, 2:13 PM CDTMesoscale DiscussionSPC62 min
Mar 9, 3:49 PM CDTTornado WatchSPC6 hr
Mar 9, 9:25 PM CDTMesoscale DiscussionSPC65 min
Mar 10, 12:21 AM CDTSpecial Weather StatementTSA39 min
Mar 11, 3:50 PM CDTWinter Weather AdvisoryTSA24 hr
Mar 15, 7:00 AM CDTDense Fog AdvisoryTSA3 hr
Mar 23, 5:14 AM CDTWind AdvisoryTSA17 hr
Mar 23, 5:08 PM CDTMesoscale DiscussionSPC97 min
Mar 23, 5:19 PM CDTTornado WatchSPC7 hr
Mar 23, 7:37 PM CDTSevere Thunderstorm WarningTSA53 min
Mar 23, 8:28 PM CDTSevere Thunderstorm WarningTSA51 min
Mar 23, 11:09 PM CDTMesoscale DiscussionSPC66 min
Mar 23, 11:35 PM CDTMesoscale DiscussionSPC115 min
Mar 23, 11:43 PM CDTSevere Thunderstorm WatchSPC5 hr
Mar 24, 12:27 AM CDTSevere Thunderstorm WarningTSA48 min
Mar 24, 1:09 AM CDTSevere Thunderstorm WarningTSA51 min
Mar 24, 1:11 AM CDTWind AdvisoryTSA7 hr
Mar 24, 1:27 AM CDTSevere Thunderstorm WarningTSA63 min
Mar 24, 1:43 AM CDTSevere Thunderstorm WarningTSA47 min
Mar 24, 2:17 AM CDTSevere Thunderstorm WarningTSA43 min
Mar 24, 2:28 AM CDTMesoscale DiscussionSPC2 hr
Mar 24, 2:55 AM CDTSpecial Weather StatementTSA35 min
Mar 24, 7:05 AM CDTSpecial Weather StatementTSA25 min
Mar 24, 8:02 AM CDTSevere Thunderstorm WarningTSA30 min
Mar 25, 3:25 PM CDTSpecial Weather StatementTSA65 min
Mar 26, 3:49 AM CDTWinter Storm WatchTSA36 hr
Mar 26, 12:40 PM CDTSevere Thunderstorm WarningTSA50 min
Mar 26, 12:54 PM CDTMesoscale DiscussionSPC2 hr
Mar 27, 4:07 AM CDTWinter Storm WarningTSA39 hr
Mar 27, 6:50 AM CDTMesoscale DiscussionSPC85 min
Mar 27, 8:09 AM CDTSevere Thunderstorm WarningTSA37 min
Mar 27, 1:14 PM CDTSpecial Weather StatementTSA46 min
Mar 27, 2:14 PM CDTSevere Thunderstorm WarningTSA61 min
Mar 27, 3:15 PM CDTSevere Thunderstorm WarningTSA39 min
Mar 27, 3:50 PM CDTWinter Weather AdvisoryTSA27 hr
Mar 27, 4:32 PM CDTSpecial Weather StatementTSA43 min
Mar 28, 5:03 PM CDTFreeze WarningTSA17 hr
Mar 30, 5:05 PM CDTMesoscale DiscussionSPC25 min
Mar 30, 5:18 PM CDTSevere Thunderstorm WatchSPC8 hr
Mar 30, 7:40 PM CDTMesoscale DiscussionSPC2 hr
Mar 30, 8:53 PM CDTSevere Thunderstorm WarningTSA52 min
Mar 30, 10:10 PM CDTMesoscale DiscussionSPC95 min
Apr 1, 11:12 AM CDTWind AdvisoryTSA8 hr
Apr 1, 12:52 PM CDTRed Flag WarningTSA6 hr
Apr 2, 4:02 AM CDTWind AdvisoryTSA12 hr
Apr 2, 3:42 PM CDTFreeze WarningTSA17 hr
Apr 3, 3:02 PM CDTFreeze WatchTSA48 hr
Apr 3, 3:02 PM CDTFreeze WatchTSA48 hr
Apr 4, 10:16 AM CDTWind AdvisoryTSA9 hr
Apr 5, 4:30 AM CDTWind AdvisoryTSA15 hr
Apr 5, 3:03 PM CDTFreeze WarningTSA42 hr
Apr 7, 3:32 PM CDTFreeze WarningTSA13 hr
Apr 8, 4:32 AM CDTFire Weather WatchTSA30 hr
Apr 9, 4:43 AM CDTRed Flag WarningTSA17 hr
Apr 9, 12:47 PM CDTMesoscale DiscussionSPC2 hr
Apr 9, 1:44 PM CDTTornado WatchSPC7 hr
Apr 9, 2:59 PM CDTWind AdvisoryTSA7 hr
Apr 9, 4:10 PM CDTSevere Thunderstorm WarningTSA65 min
Apr 12, 4:40 PM CDTSpecial Weather StatementTSA50 min
Apr 17, 4:19 PM CDTWind AdvisoryTSA3 hr
Apr 18, 2:49 PM CDTMesoscale DiscussionSPC86 min
Apr 18, 4:23 PM CDTSevere Thunderstorm WatchSPC8 hr
Apr 18, 5:14 PM CDTMesoscale DiscussionSPC91 min
Apr 18, 7:47 PM CDTSpecial Weather StatementTSA73 min
Apr 18, 8:14 PM CDTMesoscale DiscussionSPC91 min
Apr 18, 8:56 PM CDTSpecial Weather StatementTSA64 min
Apr 18, 9:16 PM CDTSevere Thunderstorm WarningTSA59 min
Apr 18, 10:13 PM CDTSevere Thunderstorm WarningTSA47 min
Apr 23, 11:23 PM CDTSpecial Weather StatementTSA37 min
Apr 24, 8:51 AM CDTWind AdvisoryTSA11 hr
Apr 26, 3:40 AM CDTWind AdvisoryTSA15 hr
Apr 26, 7:25 PM CDTWind AdvisoryTSA3 hr
Apr 26, 10:32 PM CDTSpecial Weather StatementTSA28 min
Apr 26, 11:37 PM CDTSpecial Weather StatementTSA53 min
Apr 27, 12:32 PM CDTMesoscale DiscussionSPC88 min
Apr 27, 12:47 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 27, 3:28 PM CDTMesoscale DiscussionSPC2 hr
Apr 27, 6:03 PM CDTMesoscale DiscussionSPC27 min
Apr 29, 2:49 AM CDTFlash Flood WatchTSA40 hr
Apr 29, 12:46 PM CDTWind AdvisoryTSA3 hr
Apr 30, 1:04 AM CDTSpecial Weather StatementTSA41 min
Apr 30, 1:06 AM CDTSpecial Weather StatementTSA39 min
Apr 30, 5:13 PM CDTMesoscale DiscussionSPC92 min
May 1, 12:45 AM CDTSevere Thunderstorm WatchSPC6 hr
May 1, 3:00 AM CDTMesoscale DiscussionSPC2 hr
May 1, 3:39 AM CDTFlash Flood WatchTSA54 hr
May 1, 6:08 AM CDTMesoscale DiscussionSPC67 min
May 1, 7:26 AM CDTSevere Thunderstorm WatchSPC7 hr
May 1, 10:19 AM CDTFlash Flood WarningTSA3 hr
May 1, 1:22 PM CDTMesoscale DiscussionSPC53 min
May 1, 2:35 PM CDTRiver Flood WatchTSA58 hr
May 2, 2:58 AM CDTMesoscale DiscussionSPC3 hr
May 7, 4:04 AM CDTFlash Flood WatchTSA31 hr
May 7, 4:15 AM CDTDense Fog AdvisoryTSA8 hr
May 8, 4:31 AM CDTMesoscale DiscussionSPC59 min
May 8, 4:55 AM CDTSevere Thunderstorm Watch PDSSPC7 hr
May 12, 9:10 AM CDTMesoscale DiscussionSPC65 min
May 12, 10:12 AM CDTSpecial Weather StatementTSA63 min
May 12, 1:00 PM CDTSevere Thunderstorm WarningTSA27 min
May 13, 1:59 AM CDTWind AdvisoryTSA13 hr
May 13, 9:57 AM CDTRiver Flood WatchTSA5 hr
May 13, 10:15 AM CDTFlash Flood WatchTSA21 hr
May 13, 2:38 PM CDTRiver Flood WarningTSA12 hr
May 13, 3:21 PM CDTMesoscale DiscussionSPC84 min
May 13, 5:11 PM CDTSevere Thunderstorm WatchSPC6 hr
May 13, 8:22 PM CDTMesoscale DiscussionSPC53 min
May 13, 9:49 PM CDTSevere Thunderstorm WarningTSA44 min
May 13, 9:50 PM CDTSevere Thunderstorm WarningTSA55 min
May 13, 10:06 PM CDTSevere Thunderstorm WarningTSA24 min
May 13, 10:43 PM CDTSevere Thunderstorm WarningTSA49 min
May 13, 11:13 PM CDTAreal Flood AdvisoryTSA2 hr
May 13, 11:27 PM CDTMesoscale DiscussionSPC93 min
May 15, 12:19 PM CDTFlash Flood WatchTSA11 hr
May 15, 7:11 PM CDTMesoscale DiscussionSPC64 min
May 15, 7:48 PM CDTSevere Thunderstorm WatchSPC5 hr
May 15, 8:33 PM CDTSevere Thunderstorm WarningTSA72 min
May 15, 9:03 PM CDTSevere Thunderstorm WarningTSA72 min
May 15, 10:05 PM CDTSevere Thunderstorm WarningTSA70 min
May 23, 5:23 PM CDTSpecial Weather StatementTSA52 min
Jun 2, 8:50 PM CDTFlash Flood WatchTSA4 hr
Jun 8, 4:35 AM CDTSpecial Weather StatementTSA25 min
Jun 10, 3:38 PM CDTSevere Thunderstorm WarningTSA37 min
Jun 10, 3:46 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 11, 3:59 AM CDTDense Fog AdvisoryTSA4 hr
Jun 12, 6:23 AM CDTMesoscale DiscussionSPC67 min
Jun 12, 7:46 AM CDTSevere Thunderstorm WatchSPC7 hr
Jun 12, 9:33 AM CDTSevere Thunderstorm WarningTSA72 min
Jun 12, 10:35 AM CDTSevere Thunderstorm WarningTSA55 min
Jun 12, 10:46 AM CDTSevere Thunderstorm WarningTSA29 min
Jun 12, 11:01 AM CDTMesoscale DiscussionSPC89 min
Jun 12, 11:16 AM CDTSevere Thunderstorm WarningTSA59 min
Jun 12, 10:08 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 12, 11:29 PM CDTSevere Thunderstorm WarningTSA61 min
Jun 13, 10:33 PM CDTMesoscale DiscussionSPC57 min
Jun 13, 11:02 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 14, 8:23 AM CDTSpecial Weather StatementTSA52 min
Jun 19, 1:40 PM CDTMesoscale DiscussionSPC95 min
Jun 21, 9:12 PM CDTExcessive Heat WatchTSA19 hr
Jun 21, 9:12 PM CDTHeat AdvisoryTSA19 hr
Jun 22, 2:55 AM CDTExcessive Heat WarningTSA6 days
Jun 30, 12:53 PM CDTMesoscale DiscussionSPC97 min
Jun 30, 3:47 PM CDTMesoscale DiscussionSPC58 min
Jul 8, 9:50 AM CDTMesoscale DiscussionSPC85 min
Jul 8, 11:13 AM CDTSpecial Weather StatementTSA32 min
Jul 8, 12:31 PM CDTSpecial Weather StatementTSA44 min
Jul 8, 10:01 PM CDTMesoscale DiscussionSPC119 min
Jul 9, 5:57 AM CDTSpecial Weather StatementTSA33 min
Jul 9, 6:37 AM CDTSevere Thunderstorm WarningTSA28 min
Jul 9, 4:15 PM CDTExcessive Heat WatchTSA23 hr
Jul 9, 4:15 PM CDTHeat AdvisoryTSA39 hr
Jul 10, 3:21 PM CDTExcessive Heat WarningTSA6 days
Jul 13, 5:55 PM CDTMesoscale DiscussionSPC2 hr
Jul 15, 9:39 PM CDTSevere Thunderstorm WarningTSA66 min
Jul 15, 9:45 PM CDTMesoscale DiscussionSPC90 min
Jul 15, 10:12 PM CDTSevere Thunderstorm WarningTSA63 min
Jul 15, 10:34 PM CDTSevere Thunderstorm WarningTSA36 min
Jul 16, 2:02 AM CDTSpecial Weather StatementTSA58 min
Jul 16, 2:55 AM CDTAreal Flood AdvisoryTSA65 min
Jul 16, 3:13 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 20, 8:43 PM CDTTornado WatchSPC7 hr
Jul 21, 1:34 AM CDTMesoscale DiscussionSPC86 min
Jul 21, 2:20 AM CDTSevere Thunderstorm WarningTSA74 min
Jul 21, 3:20 AM CDTSpecial Weather StatementTSA70 min
Jul 28, 3:32 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 28, 6:32 PM CDTMesoscale DiscussionSPC88 min
Jul 28, 7:23 PM CDTSevere Thunderstorm WarningTSA67 min
Jul 28, 8:03 PM CDTSevere Thunderstorm WarningTSA57 min
Jul 28, 8:36 PM CDTSevere Thunderstorm WarningTSA54 min
Jul 29, 8:59 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 30, 9:15 AM CDTAreal Flood AdvisoryTSA2 hr
Aug 3, 3:32 AM CDTExcessive Heat WatchTSA12 hr
Aug 3, 3:31 PM CDTHeat AdvisoryTSA4 days
Aug 5, 3:17 PM CDTSpecial Weather StatementTSA43 min
Aug 5, 3:25 PM CDTSevere Thunderstorm WarningTSA23 min
Aug 10, 2:58 PM CDTMesoscale DiscussionSPC92 min
Aug 10, 4:35 PM CDTSevere Thunderstorm WatchSPC5 hr
Aug 10, 5:26 PM CDTMesoscale DiscussionSPC3 hr
Aug 10, 5:59 PM CDTSevere Thunderstorm WarningTSA61 min
Aug 10, 6:18 PM CDTAreal Flood AdvisoryTSA3 hr
Aug 10, 6:28 PM CDTSevere Thunderstorm WarningTSA47 min
Aug 10, 6:29 PM CDTSpecial Weather StatementTSA31 min
Aug 10, 6:42 PM CDTAreal Flood AdvisoryTSA63 min
Aug 10, 6:54 PM CDTSevere Thunderstorm WarningTSA66 min
Aug 10, 7:09 PM CDTAreal Flood AdvisoryTSA3 hr
Aug 10, 9:20 PM CDTMesoscale DiscussionSPC25 min
Aug 17, 11:53 AM CDTSpecial Weather StatementTSA52 min
Aug 17, 11:39 PM CDTSpecial Weather StatementTSA66 min
Aug 18, 12:40 AM CDTSpecial Weather StatementTSA65 min
Aug 19, 2:35 AM CDTSpecial Weather StatementTSA55 min
Aug 19, 3:13 AM CDTSpecial Weather StatementTSA77 min
Aug 19, 4:02 PM CDTTornado WatchSPC7 hr
Aug 19, 9:18 PM CDTMesoscale DiscussionSPC27 min
Aug 19, 11:57 PM CDTSevere Thunderstorm WarningTSA48 min
Aug 20, 12:54 AM CDTSpecial Weather StatementTSA51 min
Aug 20, 1:07 AM CDTSevere Thunderstorm WarningTSA38 min
Aug 20, 8:02 AM CDTAreal Flood AdvisoryTSA3 hr
Sep 3, 1:36 AM CDTSpecial Weather StatementTSA39 min
Sep 3, 2:14 AM CDTSpecial Weather StatementTSA46 min
Sep 3, 2:43 AM CDTSpecial Weather StatementTSA47 min
Sep 3, 2:57 AM CDTSevere Thunderstorm WarningTSA20 min
Sep 3, 3:45 AM CDTMesoscale DiscussionSPC2 hr
Sep 8, 2:37 PM CDTSevere Thunderstorm WarningTSA23 min
Sep 8, 3:10 PM CDTSpecial Weather StatementTSA35 min
Sep 9, 4:44 PM CDTSpecial Weather StatementTSA31 min
Sep 9, 8:43 PM CDTSpecial Weather StatementTSA32 min
Sep 11, 3:35 PM CDTFlood WatchTSA48 hr
Sep 21, 1:26 PM CDTMesoscale DiscussionSPC2 hr
Sep 21, 2:00 PM CDTSevere Thunderstorm WatchSPC8 hr
Sep 21, 2:23 PM CDTSevere Thunderstorm WarningTSA52 min
Sep 21, 2:54 PM CDTSevere Thunderstorm WarningTSA66 min
Sep 21, 3:24 PM CDTSevere Thunderstorm WarningTSA66 min
Sep 21, 3:53 PM CDTSevere Thunderstorm WarningTSA37 min
Sep 21, 4:28 PM CDTSevere Thunderstorm WarningTSA32 min
Sep 21, 5:06 PM CDTSevere Thunderstorm WarningTSA39 min
Sep 21, 6:10 PM CDTMesoscale DiscussionSPC65 min
Sep 21, 7:09 PM CDTSevere Thunderstorm WarningTSA51 min
Sep 25, 2:38 AM CDTDense Fog AdvisoryTSA6 hr
Oct 6, 3:15 AM CDTMesoscale DiscussionSPC2 hr
Oct 6, 3:46 PM CDTFlood WatchTSA67 hr
Oct 8, 2:42 PM CDTMesoscale DiscussionSPC63 min
Oct 8, 3:02 PM CDTSevere Thunderstorm WatchSPC6 hr
Oct 8, 4:02 PM CDTAreal Flood AdvisoryTSA118 min
Oct 8, 4:46 PM CDTFlash Flood WarningTSA6 hr
Oct 8, 5:27 PM CDTSpecial Weather StatementTSA48 min
Oct 8, 10:43 PM CDTFlash Flood WarningTSA4 hr
Oct 9, 2:35 AM CDTAreal Flood WarningTSA13 hr
Oct 23, 4:24 AM CDTFrost AdvisoryTSA29 hr
Oct 29, 6:43 AM CDTSevere Thunderstorm WatchSPC5 hr
Oct 29, 7:46 AM CDTSpecial Weather StatementTSA44 min
Oct 29, 8:02 AM CDTSevere Thunderstorm WarningTSA58 min
Oct 29, 8:23 AM CDTSevere Thunderstorm WarningTSA52 min
Oct 29, 8:46 AM CDTSevere Thunderstorm WarningTSA35 min
Oct 29, 9:14 AM CDTSevere Thunderstorm WarningTSA61 min
Oct 29, 9:42 AM CDTAreal Flood AdvisoryTSA3 hr
Oct 29, 11:18 AM CDTAreal Flood AdvisoryTSA117 min
Oct 29, 11:41 AM CDTFlash Flood WarningTSA4 hr
Oct 29, 1:57 PM CDTRiver Flood WarningTSA24 hr
Nov 18, 3:50 PM CSTFreeze WarningTSA17 hr
Dec 7, 7:40 PM CSTWinter Weather AdvisoryTSA14 hr
Dec 8, 9:39 PM CSTWind AdvisoryTSA6 hr
Dec 23, 2:37 AM CSTMesoscale DiscussionSPC2 hr
Dec 23, 3:11 AM CSTSpecial Weather StatementTSA49 min
Dec 23, 4:04 AM CSTWinter Storm WatchTSA24 hr
Dec 23, 10:31 AM CSTMesoscale DiscussionSPC89 min
Dec 23, 12:18 PM CSTMesoscale DiscussionSPC57 min
Dec 23, 1:02 PM CSTSpecial Weather StatementTSA28 min
Dec 23, 3:55 PM CSTWinter Storm WarningTSA36 hr
Dec 24, 7:25 AM CSTMesoscale DiscussionSPC6 hr
Dec 24, 10:50 AM CSTBlizzard WarningTSA17 hr
Dec 24, 11:23 AM CSTMesoscale DiscussionSPC6 hr
Dec 28, 9:01 PM CSTWinter Weather AdvisoryTSA31 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.