Alert archive / Illinois / Rock Island County

Weather alerts in Rock Island County, Illinois, 2016

130 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Rock Island County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts
130
Warnings
39
Watches
23
Advisories
28
Busiest month
July19 alerts
Busiest day
March 15, 20167 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 6 tornado warnings covering Rock Island County in 2016 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 18 minutes after it went out.

Rock Island County, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings6267%250%18 min
Severe thunderstorm warnings14137%1250%29 min
Flash flood warnings00

Each office's whole area, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Quad Cities, IA: tornado warnings311648%3361%18 min
NWS Quad Cities, IA: severe thunderstorm warnings907022%24971%24 min
NWS Quad Cities, IA: flash flood warnings291838%4475%87 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 8, 6:21 AM CSTDense Fog AdvisoryDVN17 hr
Jan 9, 3:22 AM CSTWind Chill AdvisoryDVN33 hr
Jan 16, 3:14 PM CSTWind Chill AdvisoryDVN45 hr
Jan 19, 12:26 PM CSTRiver Flood WarningDVN13 days
Feb 1, 3:48 AM CSTWinter Weather AdvisoryDVN35 hr
Feb 1, 10:03 AM CSTDense Fog AdvisoryDVN4 hr
Feb 1, 9:14 PM CSTDense Fog AdvisoryDVN6 hr
Feb 2, 5:31 PM CSTDense Fog AdvisoryDVN9 hr
Feb 13, 3:38 AM CSTWinter Weather AdvisoryDVN38 hr
Feb 15, 4:30 AM CSTDense Fog AdvisoryDVN6 hr
Feb 18, 3:49 PM CSTWind AdvisoryDVN26 hr
Feb 19, 9:55 AM CSTHigh Wind WarningDVN8 hr
Mar 2, 2:48 PM CSTWinter Weather AdvisoryDVN12 hr
Mar 15, 3:48 AM CDTHigh Wind WatchDVN12 hr
Mar 15, 6:56 AM CDTSpecial Weather StatementDVN94 min
Mar 15, 2:24 PM CDTMesoscale DiscussionSPC66 min
Mar 15, 3:27 PM CDTWind AdvisoryDVN29 hr
Mar 15, 3:31 PM CDTTornado WatchSPC7 hr
Mar 15, 6:26 PM CDTSevere Thunderstorm WarningDVN49 min
Mar 15, 6:50 PM CDTSevere Thunderstorm WarningDVN55 min
Mar 15, 7:11 PM CDTTornado WarningDVN49 min
Mar 15, 7:31 PM CDTTornado Warning Tornado observedDVN44 min
Mar 23, 11:23 PM CDTSpecial Weather StatementDVN22 min
Mar 23, 11:48 PM CDTSpecial Weather StatementDVN42 min
Mar 24, 12:24 PM CDTRiver Flood WarningDVN5 days
Mar 24, 12:24 PM CDTRiver Flood WarningDVN6 days
Mar 24, 3:15 PM CDTRiver Flood WarningDVN6 days
Mar 24, 3:15 PM CDTRiver Flood WarningDVN7 days
Mar 31, 10:13 AM CDTSpecial Weather StatementDVN47 min
Mar 31, 10:46 AM CDTMesoscale DiscussionSPC89 min
Apr 1, 3:28 PM CDTWind AdvisoryDVN28 hr
Apr 3, 4:18 AM CDTWind AdvisoryDVN17 hr
Apr 7, 3:45 PM CDTFreeze WatchDVN12 hr
Apr 8, 3:16 AM CDTFreeze WarningDVN30 hr
Apr 11, 9:42 AM CDTFreeze WarningDVN23 hr
Apr 21, 3:42 AM CDTDense Fog AdvisoryDVN5 hr
Apr 21, 12:22 PM CDTSpecial Weather StatementDVN23 min
Apr 21, 1:18 PM CDTSpecial Weather StatementDVN117 min
Apr 21, 1:29 PM CDTMesoscale DiscussionSPC3 hr
Apr 25, 2:17 PM CDTSevere Thunderstorm WatchSPC8 hr
May 10, 1:01 PM CDTSpecial Weather StatementDVN59 min
May 11, 4:31 AM CDTDense Fog AdvisoryDVN5 hr
May 14, 3:47 AM CDTFrost AdvisoryDVN28 hr
May 26, 6:15 AM CDTSpecial Weather StatementDVN45 min
May 28, 12:37 PM CDTMesoscale DiscussionSPC113 min
May 28, 1:37 PM CDTSevere Thunderstorm WatchSPC7 hr
May 28, 3:44 PM CDTSpecial Weather StatementDVN46 min
May 28, 4:25 PM CDTSevere Thunderstorm WarningDVN50 min
May 28, 5:33 PM CDTMesoscale DiscussionSPC57 min
May 31, 3:50 PM CDTSpecial Weather StatementDVN25 min
Jun 14, 3:49 PM CDTMesoscale DiscussionSPC56 min
Jun 14, 6:24 PM CDTMesoscale DiscussionSPC66 min
Jun 21, 2:33 PM CDTFlash Flood WatchDVN19 hr
Jun 21, 11:18 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 22, 3:02 AM CDTSevere Thunderstorm WarningDVN43 min
Jun 22, 3:38 PM CDTMesoscale DiscussionSPC97 min
Jun 22, 6:11 PM CDTTornado WatchSPC7 hr
Jun 26, 4:19 AM CDTSpecial Weather StatementDVN41 min
Jun 30, 1:29 PM CDTMesoscale DiscussionSPC3 hr
Jul 5, 9:50 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 6, 1:27 AM CDTMesoscale DiscussionSPC2 hr
Jul 6, 3:06 AM CDTSevere Thunderstorm WarningDVN54 min
Jul 6, 3:09 AM CDTSevere Thunderstorm WarningDVN51 min
Jul 6, 3:46 AM CDTSevere Thunderstorm WarningDVN59 min
Jul 6, 5:17 AM CDTSpecial Weather StatementDVN88 min
Jul 13, 2:37 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 13, 2:45 PM CDTSevere Thunderstorm WarningDVN60 min
Jul 13, 3:12 PM CDTSpecial Weather StatementDVN63 min
Jul 13, 3:48 PM CDTSevere Thunderstorm WarningDVN57 min
Jul 17, 6:14 AM CDTSevere Thunderstorm WarningDVN61 min
Jul 17, 6:36 AM CDTTornado WarningDVN24 min
Jul 17, 7:00 AM CDTMesoscale DiscussionSPC2 hr
Jul 18, 3:37 PM CDTExcessive Heat WatchDVN44 hr
Jul 20, 4:00 AM CDTExcessive Heat WarningDVN4 days
Jul 21, 6:18 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 21, 11:08 PM CDTMesoscale DiscussionSPC67 min
Jul 23, 3:23 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 24, 4:08 AM CDTExcessive Heat WarningDVN15 hr
Aug 4, 4:44 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 4, 8:41 PM CDTMesoscale DiscussionSPC64 min
Aug 4, 8:43 PM CDTSevere Thunderstorm WarningDVN62 min
Aug 11, 3:08 AM CDTFlash Flood WatchDVN30 hr
Aug 11, 11:02 AM CDTSpecial Weather StatementDVN58 min
Aug 11, 11:13 AM CDTSevere Thunderstorm WarningDVN62 min
Aug 11, 11:44 AM CDTSevere Thunderstorm WarningDVN36 min
Aug 11, 8:57 PM CDTSpecial Weather StatementDVN93 min
Aug 11, 9:07 PM CDTMesoscale DiscussionSPC53 min
Aug 11, 10:33 PM CDTSpecial Weather StatementDVN87 min
Aug 11, 11:53 PM CDTSpecial Weather StatementDVN67 min
Aug 12, 2:29 AM CDTSpecial Weather StatementDVN2 hr
Aug 12, 10:05 AM CDTAreal Flood WarningDVN9 hr
Aug 24, 4:05 AM CDTFlash Flood WatchDVN23 hr
Aug 24, 8:54 PM CDTSpecial Weather StatementDVN66 min
Aug 26, 10:46 PM CDTSpecial Weather StatementDVN119 min
Aug 27, 1:11 AM CDTSpecial Weather StatementDVN2 hr
Sep 6, 3:25 PM CDTFlash Flood WatchDVN39 hr
Sep 7, 1:00 PM CDTMesoscale DiscussionSPC3 hr
Sep 7, 2:50 PM CDTSpecial Weather StatementDVN40 min
Sep 19, 2:55 PM CDTTornado WatchSPC4 hr
Sep 19, 5:07 PM CDTMesoscale DiscussionSPC113 min
Sep 21, 2:00 PM CDTMesoscale DiscussionSPC2 hr
Sep 22, 12:04 PM CDTRiver Flood WatchDVN24 hr
Sep 22, 12:04 PM CDTRiver Flood WatchDVN24 hr
Sep 22, 12:04 PM CDTRiver Flood WatchDVN24 hr
Sep 22, 12:04 PM CDTRiver Flood WatchDVN24 hr
Sep 22, 12:04 PM CDTRiver Flood WatchDVN24 hr
Sep 23, 11:56 AM CDTRiver Flood WarningDVN12 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVN11 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVN13 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVN14 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVN15 days
Oct 6, 10:08 PM CDTSevere Thunderstorm WarningDVN52 min
Oct 6, 10:33 PM CDTTornado WarningDVN27 min
Oct 6, 10:42 PM CDTTornado WarningDVN24 min
Oct 6, 10:55 PM CDTTornado WarningDVN35 min
Oct 20, 2:17 PM CDTFrost AdvisoryDVN18 hr
Nov 1, 11:46 PM CDTMesoscale DiscussionSPC2 hr
Nov 4, 3:48 AM CDTDense Fog AdvisoryDVN8 hr
Nov 18, 11:12 AM CSTWind AdvisoryDVN25 hr
Dec 3, 2:44 PM CSTWinter Weather AdvisoryDVN24 hr
Dec 4, 10:27 AM CSTWinter Storm WarningDVN5 hr
Dec 5, 3:47 AM CSTDense Fog AdvisoryDVN9 hr
Dec 6, 6:03 AM CSTDense Fog AdvisoryDVN5 hr
Dec 9, 11:09 AM CSTWinter Weather AdvisoryDVN58 hr
Dec 14, 3:05 AM CSTWind Chill AdvisoryDVN31 hr
Dec 15, 11:34 AM CSTWinter Weather AdvisoryDVN60 hr
Dec 16, 3:37 PM CSTWind Chill AdvisoryDVN66 hr
Dec 23, 7:41 PM CSTRiver Flood WarningDVN7 days
Dec 29, 3:34 AM CSTWind AdvisoryDVN13 hr
Dec 30, 8:04 PM CSTRiver Flood WarningDVN64 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 archive20152017

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.