Alert archive / Georgia / Henry County

Weather alerts in Henry County, Georgia, 2010

142 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Henry County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts
142
Warnings
49
Watches
43
Advisories
21
Busiest month
October28 alerts
Busiest day
November 30, 20107 alerts

Over time

By month

Warning verification

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

1 of 2 tornado warnings covering Henry County in 2010 had a tornado report inside them.

Henry County, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings2150%0
Severe thunderstorm warnings9544%580%10 min
Flash flood warnings00

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Atlanta, GA: tornado warnings37392%1127%14 min
NWS Atlanta, GA: severe thunderstorm warnings35718149%49559%17 min
NWS Atlanta, GA: flash flood warnings22959%2186%75 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.

IssuedProductOfficeLasted
Jan 6, 4:09 PM ESTWinter Weather AdvisoryFFC32 hr
Jan 15, 4:21 AM ESTRed Flag WarningFFC15 hr
Jan 16, 7:47 AM ESTWind AdvisoryFFC18 hr
Jan 20, 3:12 PM ESTFlood WatchFFC22 hr
Jan 23, 3:50 AM ESTFlood WatchFFC42 hr
Jan 23, 3:41 PM ESTWind AdvisoryFFC27 hr
Jan 24, 12:26 PM ESTTornado WatchSPC5 hr
Jan 24, 2:51 PM ESTMesoscale DiscussionSPC54 min
Jan 24, 5:18 PM ESTTornado WatchSPC7 hr
Jan 25, 3:50 AM ESTWind AdvisoryFFC14 hr
Jan 25, 10:50 AM ESTRiver Flood WarningFFC22 hr
Feb 4, 3:21 AM ESTWind AdvisoryFFC31 hr
Feb 4, 3:34 AM ESTFlood WatchFFC39 hr
Feb 5, 1:51 PM ESTRiver Flood WarningFFC27 hr
Feb 9, 4:16 AM ESTWind AdvisoryFFC48 hr
Feb 11, 3:04 PM ESTWinter Storm WatchFFC13 hr
Feb 11, 3:04 PM ESTWinter Storm WarningFFC31 hr
Feb 12, 4:22 AM ESTWinter Weather AdvisoryFFC17 hr
Feb 12, 12:46 PM ESTMesoscale DiscussionSPC5 hr
Feb 14, 3:57 AM ESTWinter Weather AdvisoryFFC29 hr
Feb 20, 4:29 AM ESTRed Flag WarningFFC15 hr
Feb 24, 1:58 PM ESTFire Weather WatchFFC13 hr
Feb 24, 2:09 PM ESTFire Weather WatchFFC25 hr
Feb 24, 3:17 PM ESTWind AdvisoryFFC28 hr
Feb 25, 3:15 AM ESTRed Flag WarningFFC16 hr
Feb 25, 2:42 PM ESTFire Weather WatchFFC37 hr
Feb 25, 2:42 PM ESTRed Flag WarningFFC28 hr
Feb 26, 3:47 AM ESTRed Flag WarningFFC39 hr
Mar 1, 2:45 PM ESTWinter Weather AdvisoryFFC26 hr
Mar 4, 3:19 PM ESTFire Weather WatchFFC25 hr
Mar 4, 3:19 PM ESTRed Flag WarningFFC29 hr
Mar 5, 4:36 PM ESTFire Weather WatchFFC22 hr
Mar 5, 4:36 PM ESTRed Flag WarningFFC27 hr
Mar 6, 2:09 PM ESTRed Flag WarningFFC30 hr
Mar 7, 3:21 AM ESTFire Weather WatchFFC11 hr
Mar 7, 2:09 PM ESTRed Flag WarningFFC29 hr
Mar 12, 1:13 AM ESTDense Fog AdvisoryFFC8 hr
Mar 12, 12:07 PM ESTMesoscale DiscussionSPC53 min
Mar 28, 7:19 PM EDTMesoscale DiscussionSPC86 min
Mar 29, 3:48 PM EDTFire Weather WatchFFC23 hr
Mar 30, 3:05 PM EDTFire Weather WatchFFC24 hr
Mar 30, 3:05 PM EDTRed Flag WarningFFC29 hr
Mar 31, 2:56 PM EDTRed Flag WarningFFC29 hr
Apr 2, 4:24 AM EDTRed Flag WarningFFC16 hr
Apr 6, 5:07 AM EDTFire Weather WatchFFC11 hr
Apr 8, 5:04 AM EDTFire Weather WatchFFC10 hr
Apr 8, 5:04 AM EDTFire Weather WatchFFC47 hr
Apr 10, 3:51 AM EDTRed Flag WarningFFC16 hr
Apr 12, 2:23 AM EDTRed Flag WarningFFC18 hr
Apr 16, 2:47 PM EDTFire Weather WatchFFC38 hr
Apr 17, 3:15 PM EDTRed Flag WarningFFC30 hr
Apr 20, 6:23 PM EDTSevere Thunderstorm WarningFFC22 min
Apr 20, 7:06 PM EDTSevere Thunderstorm WarningFFC24 min
Apr 24, 6:48 PM EDTMesoscale DiscussionSPC57 min
Apr 24, 10:58 PM EDTMesoscale DiscussionSPC32 min
Apr 24, 11:46 PM EDTTornado WatchSPC7 hr
Apr 25, 1:17 AM EDTTornado WatchSPC8 hr
May 2, 4:15 AM EDTFlash Flood WatchFFC35 hr
May 3, 2:33 AM EDTMesoscale DiscussionSPC3 hr
May 3, 5:20 AM EDTMesoscale DiscussionSPC2 hr
May 8, 3:18 AM EDTRed Flag WarningFFC17 hr
May 9, 3:34 AM EDTRed Flag WarningFFC16 hr
May 21, 3:10 PM EDTMesoscale DiscussionSPC65 min
Jun 2, 5:28 AM EDTDense Fog AdvisoryFFC5 hr
Jun 11, 3:41 PM EDTSevere Thunderstorm WarningFFC49 min
Jun 14, 9:07 PM EDTSevere Thunderstorm WarningFFC38 min
Jun 17, 5:39 PM EDTMesoscale DiscussionSPC66 min
Jun 25, 6:05 PM EDTSevere Thunderstorm WarningFFC40 min
Jul 9, 9:13 PM EDTSevere Thunderstorm WarningFFC47 min
Jul 13, 12:05 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 13, 3:03 PM EDTMesoscale DiscussionSPC87 min
Jul 13, 6:31 PM EDTMesoscale DiscussionSPC29 min
Jul 21, 3:45 PM EDTHeat AdvisoryFFC52 hr
Jul 23, 3:09 PM EDTHeat AdvisoryFFC13 days
Jul 31, 11:13 AM EDTMesoscale DiscussionSPC62 min
Jul 31, 1:31 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 31, 3:21 PM EDTMesoscale DiscussionSPC54 min
Jul 31, 7:00 PM EDTMesoscale DiscussionSPC60 min
Aug 1, 3:13 PM EDTMesoscale DiscussionSPC62 min
Aug 2, 4:22 PM EDTHeat AdvisoryFFC3 days
Aug 6, 12:58 PM EDTMesoscale DiscussionSPC32 min
Aug 6, 1:25 PM EDTSevere Thunderstorm WatchSPC10 hr
Aug 6, 4:59 PM EDTMesoscale DiscussionSPC61 min
Aug 6, 7:02 PM EDTMesoscale DiscussionSPC58 min
Aug 11, 3:13 PM EDTHeat AdvisoryFFC52 hr
Aug 14, 4:26 PM EDTMesoscale DiscussionSPC94 min
Aug 24, 12:25 PM EDTMesoscale DiscussionSPC95 min
Aug 27, 1:28 AM EDTSevere Thunderstorm WarningFFC32 min
Sep 4, 4:13 AM EDTFire Weather WatchFFC24 hr
Sep 4, 4:13 AM EDTRed Flag WarningFFC15 hr
Sep 5, 4:13 AM EDTRed Flag WarningFFC15 hr
Sep 27, 6:01 PM EDTMesoscale DiscussionSPC119 min
Oct 4, 3:43 PM EDTFire Weather WatchFFC24 hr
Oct 5, 3:17 PM EDTRed Flag WarningFFC28 hr
Oct 6, 4:27 AM EDTFire Weather WatchFFC10 hr
Oct 6, 2:38 PM EDTRed Flag WarningFFC28 hr
Oct 13, 4:41 AM EDTFire Weather WatchFFC23 hr
Oct 13, 4:41 AM EDTFire Weather WatchFFC35 hr
Oct 14, 3:18 PM EDTRed Flag WarningFFC29 hr
Oct 15, 3:57 AM EDTFire Weather WatchFFC12 hr
Oct 15, 3:53 PM EDTFire Weather WatchFFC23 hr
Oct 15, 3:53 PM EDTRed Flag WarningFFC28 hr
Oct 16, 2:26 PM EDTRed Flag WarningFFC29 hr
Oct 17, 4:11 AM EDTFire Weather WatchFFC23 hr
Oct 18, 2:50 AM EDTRed Flag WarningFFC16 hr
Oct 20, 3:44 AM EDTFire Weather WatchFFC24 hr
Oct 21, 3:18 AM EDTFire Weather WatchFFC13 hr
Oct 21, 3:18 AM EDTRed Flag WarningFFC17 hr
Oct 21, 3:53 PM EDTFire Weather WatchFFC36 hr
Oct 21, 3:53 PM EDTRed Flag WarningFFC27 hr
Oct 22, 4:06 PM EDTRed Flag WarningFFC27 hr
Oct 25, 5:35 AM EDTTornado WatchSPC7 hr
Oct 25, 7:49 AM EDTMesoscale DiscussionSPC116 min
Oct 25, 7:54 AM EDTSevere Thunderstorm WarningFFC51 min
Oct 27, 6:48 AM EDTTornado WatchSPC6 hr
Oct 27, 8:54 AM EDTMesoscale DiscussionSPC96 min
Oct 27, 10:40 AM EDTMesoscale DiscussionSPC95 min
Oct 27, 12:49 PM EDTTornado WatchSPC7 hr
Oct 27, 2:13 PM EDTTornado WarningFFC13 min
Oct 27, 3:41 PM EDTMesoscale DiscussionSPC64 min
Nov 4, 3:16 AM EDTFreeze WatchFFC12 hr
Nov 4, 3:17 PM EDTFreeze WarningFFC43 hr
Nov 5, 3:44 AM EDTFreeze WatchFFC23 hr
Nov 6, 3:11 AM EDTFreeze WarningFFC31 hr
Nov 6, 4:19 PM EDTFreeze WatchFFC11 hr
Nov 7, 2:34 AM ESTFreeze WarningFFC30 hr
Nov 7, 2:58 PM ESTRed Flag WarningFFC26 hr
Nov 8, 2:55 PM ESTRed Flag WarningFFC27 hr
Nov 12, 2:46 PM ESTRed Flag WarningFFC27 hr
Nov 24, 4:19 AM ESTDense Fog AdvisoryFFC5 hr
Nov 30, 8:43 AM ESTTornado WatchSPC8 hr
Nov 30, 10:38 AM ESTMesoscale DiscussionSPC97 min
Nov 30, 1:17 PM ESTMesoscale DiscussionSPC118 min
Nov 30, 2:34 PM ESTTornado WatchSPC7 hr
Nov 30, 4:03 PM ESTSevere Thunderstorm WarningFFC42 min
Nov 30, 4:12 PM ESTTornado WarningFFC33 min
Nov 30, 4:24 PM ESTMesoscale DiscussionSPC96 min
Dec 4, 11:59 PM ESTWind AdvisoryFFC16 hr
Dec 7, 3:01 PM ESTRed Flag WarningFFC11 hr
Dec 11, 4:11 PM ESTWind AdvisoryFFC51 hr
Dec 24, 3:11 PM ESTWinter Weather AdvisoryFFC36 hr
Dec 25, 4:11 PM ESTWind AdvisoryFFC26 hr

By product

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

ProductAlerts
Severe storms
Severe Thunderstorm Warning9
Tornado Warning2
Severe Thunderstorm Watch3
Tornado Watch9
Mesoscale Discussion29
Flooding
River Flood Warning2
Flash Flood Watch1
Flood Watch3
Winter
Winter Storm Warning1
Winter Storm Watch1
Winter Weather Advisory5
Heat
Heat Advisory4
Cold
Freeze Warning3
Freeze Watch3
Wind and dust
Wind Advisory9
Fire
Red Flag Warning32
Fire Weather Watch23
Fog and smoke
Dense Fog Advisory3

The busiest days

Days with the most alerts issued, by UTC date.

  1. November 30, 20107alerts
  2. October 27, 20106alerts
  3. July 31, 20104alerts
  4. August 6, 20104alerts
  5. October 21, 20104alerts
  6. January 24, 20103alerts
  7. February 24, 20103alerts
  8. February 25, 20103alerts
  9. April 25, 20103alerts
  10. July 13, 20103alerts

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20092011

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.