Alert archive / Idaho / Elmore County

Weather alerts in Elmore County, Idaho, 2017

84 weather alerts in 2017, 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 2017. Tap one for its archive.

Alerts
84
Warnings
29
Watches
10
Advisories
37
Busiest month
January17 alerts
Busiest day
August 30, 20174 alerts

Over time

By month

Warning verification

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

Elmore County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings7271%617%32 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boise, ID: severe thunderstorm warnings23387%447%17 min
NWS Boise, ID: flash flood warnings80100%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 2, 2:31 PM MSTWinter Storm WatchBOI317 days
Jan 3, 4:23 AM MSTWinter Storm WarningBOI43 hr
Jan 3, 4:23 AM MSTWinter Weather AdvisoryBOI11 hr
Jan 5, 1:34 PM MSTWind Chill WarningBOI21 hr
Jan 6, 2:24 PM MSTWind Chill WarningBOI19 hr
Jan 6, 2:24 PM MSTWinter Storm WarningBOI43 hr
Jan 7, 2:30 PM MSTWinter Storm WarningBOI33 hr
Jan 7, 2:30 PM MSTWinter Weather AdvisoryBOI27 hr
Jan 9, 3:44 AM MSTWinter Weather AdvisoryBOI10 hr
Jan 9, 2:11 PM MSTWinter Storm WarningBOI51 hr
Jan 13, 2:29 PM MSTDense Fog AdvisoryBOI19 hr
Jan 16, 3:00 PM MSTWinter Storm WatchBOI25 hr
Jan 17, 4:49 AM MSTWinter Storm WarningBOI54 hr
Jan 17, 4:49 AM MSTWinter Weather AdvisoryBOI54 hr
Jan 22, 2:53 PM MSTWinter Weather AdvisoryBOI27 hr
Jan 25, 5:31 AM MSTDense Fog AdvisoryBOI4 hr
Jan 26, 9:35 PM MSTDense Fog AdvisoryBOI13 hr
Jan 31, 8:58 PM MSTWinter Storm WatchBOI41 hr
Feb 2, 1:28 PM MSTWinter Storm WarningBOI68 hr
Feb 6, 2:56 PM MSTWinter Weather AdvisoryBOI26 hr
Feb 8, 10:46 AM MSTAreal Flood WarningBOI57 hr
Feb 8, 11:04 AM MSTAreal Flood AdvisoryBOI57 hr
Feb 15, 4:29 AM MSTDense Fog AdvisoryBOI7 hr
Feb 23, 8:45 AM MSTWind AdvisoryBOI11 hr
Mar 8, 12:01 PM MSTFlood WatchBOI20 hr
Mar 9, 8:00 AM MSTAreal Flood AdvisoryBOI36 hr
Mar 17, 8:47 AM MDTAreal Flood AdvisoryBOI4 days
Mar 23, 1:52 PM MDTAreal Flood AdvisoryBOI4 days
Mar 27, 1:23 PM MDTAreal Flood AdvisoryBOI24 hr
Mar 28, 1:12 PM MDTAreal Flood AdvisoryBOI4 days
Mar 28, 1:49 PM MDTHigh Wind WatchBOI14 hr
Mar 28, 1:49 PM MDTWind AdvisoryBOI58 hr
Mar 29, 11:54 AM MDTHigh Wind WarningBOI36 hr
Apr 1, 1:56 PM MDTAreal Flood AdvisoryBOI4 days
Apr 5, 1:27 PM MDTAreal Flood AdvisoryBOI48 hr
Apr 18, 1:01 PM MDTSpecial Weather StatementBOI44 min
Apr 26, 2:28 PM MDTWind AdvisoryBOI31 hr
May 5, 3:16 PM MDTMesoscale DiscussionSPC119 min
May 5, 5:54 PM MDTSevere Thunderstorm WarningBOI27 min
May 7, 11:25 AM MDTAreal Flood WarningBOI48 hr
May 7, 11:56 AM MDTAreal Flood WarningBOI48 hr
May 9, 12:08 PM MDTAreal Flood WarningBOI4 days
May 13, 11:59 AM MDTAreal Flood WarningBOI48 hr
May 16, 6:08 PM MDTSpecial Weather StatementBOI52 min
May 26, 5:41 PM MDTSpecial Weather StatementBOI34 min
May 30, 12:41 PM MDTAreal Flood AdvisoryBOI48 hr
Jun 1, 12:50 PM MDTAreal Flood AdvisoryBOI48 hr
Jun 1, 5:12 PM MDTSpecial Weather StatementBOI33 min
Jun 3, 12:58 PM MDTAreal Flood AdvisoryBOI4 days
Jun 4, 7:13 PM MDTSevere Thunderstorm WarningBOI47 min
Jun 7, 1:42 PM MDTAreal Flood AdvisoryBOI48 hr
Jun 22, 12:44 PM MDTRed Flag WarningBOI8 hr
Jun 26, 2:12 PM MDTMesoscale DiscussionSPC3 hr
Jun 26, 7:37 PM MDTSevere Thunderstorm WarningBOI24 min
Jul 6, 3:12 PM MDTHeat AdvisoryBOI3 days
Jul 9, 4:20 PM MDTSpecial Weather StatementBOI25 min
Jul 13, 1:46 PM MDTFire Weather WatchBOI25 hr
Jul 14, 3:06 PM MDTRed Flag WarningBOI33 hr
Aug 8, 2:21 PM MDTFire Weather WatchBOI18 hr
Aug 9, 8:13 AM MDTRed Flag WarningBOI13 hr
Aug 21, 3:09 PM MDTFire Weather WatchBOI23 hr
Aug 22, 2:32 PM MDTRed Flag WarningBOI33 hr
Aug 24, 7:42 PM MDTSevere Thunderstorm WarningBOI48 min
Aug 29, 8:29 AM MDTFire Weather WatchBOI24 hr
Aug 30, 8:26 AM MDTRed Flag WarningBOI17 hr
Aug 30, 4:22 PM MDTSpecial Weather StatementBOI53 min
Aug 30, 4:49 PM MDTSevere Thunderstorm WarningBOI26 min
Aug 30, 5:14 PM MDTSevere Thunderstorm WarningBOI46 min
Aug 30, 10:47 PM MDTSevere Thunderstorm WarningBOI43 min
Sep 1, 2:47 PM MDTFire Weather WatchBOI24 hr
Sep 2, 2:34 PM MDTRed Flag WarningBOI4 days
Oct 7, 2:38 PM MDTFrost AdvisoryBOI42 hr
Nov 15, 2:55 AM MSTWinter Storm WarningBOI36 hr
Nov 23, 12:04 AM MSTDense Fog AdvisoryBOI13 hr
Nov 27, 2:37 AM MSTWind AdvisoryBOI14 hr
Dec 3, 4:15 AM MSTWind AdvisoryBOI22 hr
Dec 12, 1:59 PM MSTDense Fog AdvisoryBOI21 hr
Dec 22, 11:02 AM MSTWinter Weather AdvisoryBOI27 hr
Dec 23, 7:33 AM MSTWinter Storm WarningBOI3 hr
Dec 23, 2:58 PM MSTWinter Weather AdvisoryBOI43 hr
Dec 26, 1:21 AM MSTDense Fog AdvisoryBOI12 hr
Dec 27, 3:03 PM MSTWinter Weather AdvisoryBOI41 hr
Dec 28, 3:02 AM MSTDense Fog AdvisoryBOI8 hr
Dec 29, 9:01 PM MSTWinter Weather AdvisoryBOI13 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 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.