Alert archive / California / Fresno County

Weather alerts in Fresno County, California, 2017

91 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Fresno County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
91
Warnings
22
Watches
0
Advisories
39
Busiest month
January46 alerts
Busiest day
January 9, 201710 alerts

Over time

By month

Warning verification

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

Fresno County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings6350%667%26 min
Flash flood warnings7271%200%

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Hanford, CA: tornado warnings20100%0
NWS Hanford, CA: severe thunderstorm warnings31584%2642%22 min
NWS Hanford, CA: flash flood warnings421076%9815%70 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, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 7, 11:57 AM PSTAreal Flood AdvisoryHNX63 min
Jan 7, 12:57 PM PSTFlash Flood WarningHNX63 min
Jan 7, 2:17 PM PSTFlash Flood WarningHNX58 min
Jan 7, 6:20 PM PSTAreal Flood AdvisoryHNX6 hr
Jan 8, 4:12 PM PSTAreal Flood AdvisoryHNX2 hr
Jan 8, 6:09 PM PSTAreal Flood AdvisoryHNX3 hr
Jan 8, 10:39 PM PSTAreal Flood AdvisoryHNX6 hr
Jan 9, 1:01 AM PSTFlash Flood WarningHNX3 hr
Jan 9, 6:42 AM PSTSpecial Weather StatementHNX48 min
Jan 9, 7:11 AM PSTAreal Flood AdvisoryHNX3 hr
Jan 9, 7:51 AM PSTAreal Flood AdvisoryHNX3 hr
Jan 9, 9:08 AM PSTAreal Flood WarningHNX6 hr
Jan 9, 9:16 AM PSTSpecial Weather StatementHNX44 min
Jan 9, 2:54 PM PSTAreal Flood WarningHNX6 hr
Jan 9, 9:00 PM PSTAreal Flood WarningHNX9 hr
Jan 10, 9:44 PM PSTAreal Flood AdvisoryHNX3 hr
Jan 10, 11:21 PM PSTAreal Flood AdvisoryHNX3 hr
Jan 11, 12:10 AM PSTSpecial Weather StatementHNX35 min
Jan 11, 12:48 AM PSTSpecial Weather StatementHNX42 min
Jan 11, 1:57 AM PSTSpecial Weather StatementHNX48 min
Jan 11, 8:58 AM PSTSpecial Weather StatementHNX47 min
Jan 11, 9:48 AM PSTSpecial Weather StatementHNX42 min
Jan 12, 2:45 AM PSTAreal Flood AdvisoryHNX3 hr
Jan 12, 6:05 AM PSTAreal Flood AdvisoryHNX10 hr
Jan 12, 6:27 AM PSTAreal Flood AdvisoryHNX12 hr
Jan 12, 12:28 PM PSTAreal Flood AdvisoryHNX62 min
Jan 12, 1:14 PM PSTFlash Flood WarningHNX3 hr
Jan 12, 1:45 PM PSTAreal Flood AdvisoryHNX2 hr
Jan 12, 4:14 PM PSTSpecial Weather StatementHNX46 min
Jan 12, 5:10 PM PSTSpecial Weather StatementHNX50 min
Jan 12, 8:19 PM PSTAreal Flood AdvisoryHNX3 hr
Jan 19, 5:32 PM PSTSpecial Weather StatementHNX43 min
Jan 20, 8:19 AM PSTAreal Flood AdvisoryHNX8 hr
Jan 20, 8:43 AM PSTAreal Flood AdvisoryHNX4 hr
Jan 20, 3:04 PM PSTSpecial Weather StatementHNX26 min
Jan 20, 4:54 PM PSTSpecial Weather StatementHNX51 min
Jan 20, 5:17 PM PSTSpecial Weather StatementHNX43 min
Jan 20, 5:45 PM PSTSpecial Weather StatementHNX45 min
Jan 20, 6:13 PM PSTSpecial Weather StatementHNX47 min
Jan 20, 6:46 PM PSTSpecial Weather StatementHNX44 min
Jan 22, 9:55 AM PSTAreal Flood AdvisoryHNX3 hr
Jan 22, 5:47 PM PSTAreal Flood AdvisoryHNX3 hr
Jan 22, 8:25 PM PSTAreal Flood AdvisoryHNX3 hr
Jan 22, 11:29 PM PSTAreal Flood AdvisoryHNX10 hr
Jan 23, 10:58 AM PSTSpecial Weather StatementHNX62 min
Jan 23, 11:22 AM PSTSpecial Weather StatementHNX38 min
Feb 3, 12:45 PM PSTSpecial Weather StatementHNX45 min
Feb 3, 2:41 PM PSTSpecial Weather StatementHNX49 min
Feb 3, 2:42 PM PSTAreal Flood WarningHNX3 hr
Feb 3, 3:14 PM PSTSpecial Weather StatementHNX46 min
Feb 3, 4:45 PM PSTSpecial Weather StatementHNX45 min
Feb 3, 5:27 PM PSTAreal Flood AdvisoryHNX63 min
Feb 7, 10:28 AM PSTAreal Flood AdvisoryHNX107 min
Feb 7, 11:56 AM PSTFlash Flood WarningHNX109 min
Feb 7, 1:49 PM PSTFlash Flood WarningHNX3 hr
Feb 7, 5:45 PM PSTAreal Flood WarningHNX12 hr
Feb 9, 2:38 PM PSTAreal Flood AdvisoryHNX23 hr
Feb 10, 12:10 PM PSTAreal Flood AdvisoryHNX2 hr
Feb 10, 1:31 PM PSTAreal Flood AdvisoryHNX119 min
Feb 10, 2:01 PM PSTAreal Flood AdvisoryHNX24 hr
Feb 10, 4:09 PM PSTAreal Flood AdvisoryHNX4 hr
Feb 11, 6:52 AM PSTAreal Flood WarningHNX24 hr
Feb 12, 6:43 AM PSTAreal Flood WarningHNX48 hr
Feb 14, 6:39 AM PSTAreal Flood WarningHNX72 hr
Feb 17, 4:47 AM PSTAreal Flood AdvisoryHNX5 days
Feb 20, 12:13 PM PSTAreal Flood AdvisoryHNX6 hr
Feb 22, 7:29 AM PSTAreal Flood AdvisoryHNX60 hr
Feb 24, 7:40 PM PSTAreal Flood AdvisoryHNX8 days
Mar 4, 3:35 PM PSTAreal Flood AdvisoryHNX5 days
Mar 9, 3:38 PM PSTAreal Flood AdvisoryHNX60 hr
Mar 12, 4:33 AM PDTAreal Flood AdvisoryHNX8 days
Mar 21, 5:42 PM PDTAreal Flood AdvisoryHNX3 hr
Apr 13, 1:28 PM PDTSpecial Weather StatementHNX47 min
Apr 13, 3:52 PM PDTSpecial Weather StatementHNX38 min
Apr 13, 4:58 PM PDTSpecial Weather StatementHNX47 min
Jun 11, 9:15 PM PDTSpecial Weather StatementHNX45 min
Jun 21, 2:46 PM PDTAreal Flood AdvisoryHNX60 hr
Jun 22, 2:17 PM PDTAreal Flood AdvisoryHNX60 hr
Jun 22, 3:42 PM PDTAreal Flood AdvisoryHNX3 days
Jun 23, 2:03 PM PDTAreal Flood WarningHNX6 days
Aug 2, 3:14 PM PDTSevere Thunderstorm WarningHNX31 min
Aug 18, 5:11 PM PDTFlash Flood WarningHNX3 hr
Sep 3, 7:03 PM PDTSevere Thunderstorm WarningHNX27 min
Sep 11, 3:06 PM PDTSpecial Weather StatementHNX39 min
Sep 11, 5:37 PM PDTSevere Thunderstorm WarningHNX38 min
Sep 11, 6:14 PM PDTSevere Thunderstorm WarningHNX46 min
Sep 11, 6:42 PM PDTSevere Thunderstorm WarningHNX48 min
Sep 11, 6:55 PM PDTSpecial Weather StatementHNX35 min
Sep 11, 7:30 PM PDTSpecial Weather StatementHNX45 min
Sep 11, 7:40 PM PDTSevere Thunderstorm WarningHNX50 min
Sep 11, 8:25 PM PDTSpecial Weather StatementHNX50 min

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 archive20162018

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.