Alert archive / Idaho / Elmore County

Weather alerts in Elmore County, Idaho, 2019

75 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Elmore County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts
75
Warnings
24
Watches
11
Advisories
31
Busiest month
February13 alerts
Busiest day
May 27, 20197 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 Elmore County in 2019 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Elmore County, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%10%
Severe thunderstorm warnings12467%633%29 min
Flash flood warnings00

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boise, ID: tornado warnings10100%30%
NWS Boise, ID: severe thunderstorm warnings40978%2945%9 min
NWS Boise, ID: flash flood warnings20100%0

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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 5, 4:09 AM MSTWinter Weather AdvisoryBOI51 hr
Jan 18, 3:29 AM MSTWinter Weather AdvisoryBOI32 hr
Jan 20, 2:55 AM MSTWind AdvisoryBOI41 hr
Feb 4, 2:57 PM MSTWinter Weather AdvisoryBOI6 hr
Feb 7, 1:38 PM MSTWinter Storm WatchBOI13 hr
Feb 8, 3:02 AM MSTWinter Storm WarningBOI56 hr
Feb 8, 3:02 AM MSTWinter Weather AdvisoryBOI56 hr
Feb 9, 2:13 PM MSTWinter Storm WatchBOI21 hr
Feb 9, 2:13 PM MSTWinter Weather AdvisoryBOI47 hr
Feb 10, 11:17 AM MSTWinter Storm WarningBOI3 days
Feb 15, 3:19 AM MSTWinter Weather AdvisoryBOI13 hr
Feb 19, 3:37 AM MSTWinter Weather AdvisoryBOI55 hr
Feb 20, 10:24 PM MSTWinter Storm WarningBOI5 hr
Feb 21, 2:09 PM MSTWinter Storm WatchBOI24 hr
Feb 22, 2:14 PM MSTWinter Storm WarningBOI4 days
Feb 26, 3:20 AM MSTWinter Weather AdvisoryBOI32 hr
Mar 12, 3:27 AM MDTWind AdvisoryBOI41 hr
Apr 8, 3:48 AM MDTWind AdvisoryBOI66 hr
Apr 20, 3:08 PM MDTSpecial Weather StatementBOI37 min
May 7, 3:24 AM MDTWind AdvisoryBOI17 hr
May 27, 1:53 PM MDTSpecial Weather StatementBOI52 min
May 27, 2:31 PM MDTSevere Thunderstorm WarningBOI44 min
May 27, 2:53 PM MDTSevere Thunderstorm WarningBOI52 min
May 27, 3:12 PM MDTSevere Thunderstorm WarningBOI48 min
May 27, 3:45 PM MDTSevere Thunderstorm WarningBOI45 min
May 27, 3:50 PM MDTTornado WarningBOI25 min
May 27, 4:21 PM MDTMesoscale DiscussionSPC114 min
May 28, 7:46 PM MDTAreal Flood AdvisoryBOI3 hr
May 29, 9:26 AM MDTFlash Flood WatchBOI13 hr
May 29, 8:47 PM MDTSpecial Weather StatementBOI43 min
May 29, 9:29 PM MDTSpecial Weather StatementBOI31 min
Jun 19, 2:06 PM MDTWind AdvisoryBOI30 hr
Jul 12, 5:29 PM MDTSevere Thunderstorm WarningBOI31 min
Jul 12, 5:56 PM MDTSevere Thunderstorm WarningBOI34 min
Jul 13, 8:17 AM MDTRed Flag WarningBOI14 hr
Jul 22, 1:28 PM MDTRed Flag WarningBOI35 hr
Aug 7, 8:17 AM MDTFire Weather WatchBOI6 hr
Aug 7, 2:01 PM MDTRed Flag WarningBOI3 days
Aug 8, 8:20 AM MDTFire Weather WatchBOI6 hr
Aug 9, 9:10 PM MDTSpecial Weather StatementBOI50 min
Aug 10, 11:41 AM MDTMesoscale DiscussionSPC2 hr
Aug 10, 1:36 PM MDTSevere Thunderstorm WatchSPC8 hr
Aug 10, 4:26 PM MDTSevere Thunderstorm WarningBOI49 min
Aug 10, 4:53 PM MDTMesoscale DiscussionSPC2 hr
Aug 10, 5:08 PM MDTSevere Thunderstorm WarningBOI37 min
Aug 10, 5:44 PM MDTSevere Thunderstorm WarningBOI61 min
Aug 21, 10:09 AM MDTWind AdvisoryBOI17 hr
Aug 31, 3:02 PM MDTFire Weather WatchBOI17 hr
Sep 3, 2:43 PM MDTFire Weather WatchBOI23 hr
Sep 4, 1:33 PM MDTRed Flag WarningBOI40 hr
Sep 6, 7:56 AM MDTRed Flag WarningBOI10 hr
Sep 6, 10:52 AM MDTFlash Flood WatchBOI3 hr
Sep 6, 12:31 PM MDTSevere Thunderstorm WarningBOI44 min
Sep 6, 12:44 PM MDTSevere Thunderstorm WarningBOI46 min
Sep 19, 4:34 AM MDTDense Fog AdvisoryBOI4 hr
Sep 29, 3:37 AM MDTFreeze WarningBOI29 hr
Oct 8, 3:19 AM MDTWind AdvisoryBOI40 hr
Oct 19, 12:06 PM MDTSpecial Weather StatementBOI39 min
Oct 19, 12:31 PM MDTSevere Thunderstorm WarningBOI29 min
Oct 26, 9:22 AM MDTWind AdvisoryBOI10 hr
Oct 28, 2:09 PM MDTWind AdvisoryBOI22 hr
Nov 1, 12:58 PM MDTAir Stagnation AdvisoryBOI4 days
Nov 7, 2:33 PM MSTAir Stagnation AdvisoryBOI8 days
Nov 11, 1:47 PM MSTAir Stagnation AdvisoryBOI4 days
Nov 16, 2:48 AM MSTAir Stagnation AdvisoryBOI56 hr
Nov 25, 11:40 AM MSTWinter Storm WarningBOI53 hr
Nov 25, 11:56 AM MSTHigh Wind WatchBOI19 hr
Nov 26, 3:27 AM MSTWinter Weather AdvisoryBOI38 hr
Nov 28, 3:27 AM MSTWinter Weather AdvisoryBOI38 hr
Nov 30, 1:35 PM MSTWinter Weather AdvisoryBOI49 hr
Dec 3, 2:48 AM MSTDense Fog AdvisoryBOI9 hr
Dec 3, 9:45 AM MSTAir Stagnation AdvisoryBOI3 days
Dec 4, 3:14 AM MSTDense Fog AdvisoryBOI8 hr
Dec 4, 9:59 PM MSTDense Fog AdvisoryBOI13 hr
Dec 10, 2:36 PM MSTWinter Weather AdvisoryBOI60 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 archive20182020

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.