Alert archive / Idaho / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Idaho, 2023

94 severe thunderstorm warnings in 2023. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in 2023. Tap one for its archive.

Severe Thunderstorm Warnings
94
Busiest month
May34 severe thunderstorm warnings
Busiest day
May 26, 20239 severe thunderstorm warnings

Over time

By month

Warning verification

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

30 of 94 severe thunderstorm warnings covering Idaho in 2023 had a qualifying storm report inside them; 84 of 237 hail, wind and damage reports fell inside a warning, on average 16 minutes after it went out.

Idaho, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Severe thunderstorm warnings943068%23735%16 min

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Spokane, WA: severe thunderstorm warnings361947%11657%16 min
NWS Boise, ID: severe thunderstorm warnings40880%4045%11 min
NWS Pocatello, ID: severe thunderstorm warnings551769%15527%20 min
NWS Missoula, MT: severe thunderstorm warnings13377%2520%10 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeCountiesLasted
May 2, 6:14 PM MDTSevere Thunderstorm WarningOTXShoshone46 min
May 15, 2:32 PM MDTSevere Thunderstorm WarningBOIAda, Elmore, Owyhee43 min
May 15, 4:57 PM MDTSevere Thunderstorm WarningPIHCassia, Oneida, Power33 min
May 15, 5:29 PM MDTSevere Thunderstorm WarningPIHOneida, Power31 min
May 21, 5:14 PM MDTSevere Thunderstorm WarningOTXBonner26 min
May 21, 5:29 PM MDTSevere Thunderstorm WarningBOIOwyhee46 min
May 21, 6:08 PM MDTSevere Thunderstorm WarningBOICanyon, Owyhee37 min
May 21, 8:29 PM MDTSevere Thunderstorm WarningMSOIdaho31 min
May 21, 10:29 PM MDTSevere Thunderstorm WarningOTXBonner, Boundary46 min
May 23, 4:56 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Power49 min
May 23, 5:44 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Bonneville46 min
May 23, 6:23 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville37 min
May 24, 2:50 PM MDTSevere Thunderstorm WarningPIHBannock, Cassia, Power40 min
May 24, 2:57 PM MDTSevere Thunderstorm WarningPIHBlaine, Cassia, Lincoln, Minidoka63 min
May 24, 2:58 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Power47 min
May 24, 3:33 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Bonneville, Caribou42 min
May 24, 4:01 PM MDTSevere Thunderstorm Warning Considerable damage threatPIHBlaine, Cassia, Lincoln, Minidoka, Power59 min
May 24, 5:44 PM MDTSevere Thunderstorm WarningPIHBingham, Power29 min
May 25, 2:50 PM MDTSevere Thunderstorm Warning Considerable damage threatBOIOwyhee40 min
May 25, 3:26 PM MDTSevere Thunderstorm WarningBOIOwyhee, Twin Falls49 min
May 25, 4:11 PM MDTSevere Thunderstorm WarningBOIOwyhee, Twin Falls34 min
May 25, 8:31 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Power44 min
May 26, 2:16 PM MDTSevere Thunderstorm WarningBOITwin Falls44 min
May 26, 2:55 PM MDTSevere Thunderstorm WarningPIHCassia35 min
May 26, 3:27 PM MDTSevere Thunderstorm WarningPIHLincoln33 min
May 26, 3:31 PM MDTSevere Thunderstorm WarningPIHCassia, Power29 min
May 26, 3:37 PM MDTSevere Thunderstorm WarningPIHBlaine, Power53 min
May 26, 4:15 PM MDTSevere Thunderstorm WarningPIHBlaine16 min
May 26, 4:16 PM MDTSevere Thunderstorm WarningPIHBlaine, Butte, Minidoka, Power59 min
May 26, 5:12 PM MDTSevere Thunderstorm WarningPIHButte48 min
May 30, 5:58 PM MDTSevere Thunderstorm WarningPIHBannock, Power42 min
May 31, 4:12 PM MDTSevere Thunderstorm WarningPIHCassia48 min
May 31, 4:24 PM MDTSevere Thunderstorm WarningBOIElmore, Owyhee36 min
May 31, 4:55 PM MDTSevere Thunderstorm WarningBOIElmore, Gooding, Owyhee, Twin Falls50 min
Jun 1, 4:16 PM MDTSevere Thunderstorm WarningPIHFranklin, Oneida29 min
Jun 1, 4:50 PM MDTSevere Thunderstorm WarningPIHBannock, Caribou, Franklin25 min
Jun 1, 5:06 PM MDTSevere Thunderstorm WarningPIHBannock, Franklin, Oneida24 min
Jun 6, 5:17 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville31 min
Jun 6, 5:57 PM MDTSevere Thunderstorm Warning Considerable damage threatPIHBannock, Cassia, Oneida, Power48 min
Jun 6, 7:59 PM MDTSevere Thunderstorm WarningBOIAda, Elmore, Owyhee46 min
Jun 6, 8:22 PM MDTSevere Thunderstorm WarningBOIAda, Elmore, Owyhee38 min
Jun 6, 8:54 PM MDTSevere Thunderstorm WarningBOIAda, Canyon, Owyhee51 min
Jun 7, 5:24 PM MDTSevere Thunderstorm WarningBOIAda, Boise51 min
Jun 8, 4:08 PM MDTSevere Thunderstorm WarningOTXKootenai22 min
Jun 8, 4:28 PM MDTSevere Thunderstorm WarningOTXKootenai47 min
Jun 8, 5:10 PM MDTSevere Thunderstorm WarningOTXBenewah, Kootenai50 min
Jun 9, 5:08 PM MDTSevere Thunderstorm WarningOTXLewis, Nez Perce25 min
Jun 9, 5:10 PM MDTSevere Thunderstorm WarningOTXBenewah, Latah, Shoshone50 min
Jun 9, 5:51 PM MDTSevere Thunderstorm WarningOTXBenewah, Kootenai39 min
Jun 10, 2:48 PM MDTSevere Thunderstorm WarningPIHCassia27 min
Jun 11, 2:49 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham26 min
Jun 11, 5:33 PM MDTSevere Thunderstorm WarningBOIAda27 min
Jun 13, 2:15 PM MDTSevere Thunderstorm WarningOTXBonner30 min
Jun 13, 4:17 PM MDTSevere Thunderstorm WarningBOIOwyhee22 min
Jun 13, 5:02 PM MDTSevere Thunderstorm WarningBOIOwyhee28 min
Jun 13, 5:15 PM MDTSevere Thunderstorm WarningOTXBonner, Kootenai30 min
Jun 13, 7:31 PM MDTSevere Thunderstorm WarningPIHCassia29 min
Jun 13, 9:57 PM MDTSevere Thunderstorm WarningBOIPayette, Washington33 min
Jun 13, 11:21 PM MDTSevere Thunderstorm WarningBOIAda, Boise39 min
Jun 23, 1:40 PM MDTSevere Thunderstorm WarningPIHButte, Jefferson35 min
Jun 23, 2:54 PM MDTSevere Thunderstorm WarningPIHBonneville, Clark, Fremont, Jefferson, Madison38 min
Jun 27, 2:41 PM MDTSevere Thunderstorm WarningOTXShoshone34 min
Jul 1, 2:26 PM MDTSevere Thunderstorm WarningPIHButte34 min
Jul 1, 5:52 PM MDTSevere Thunderstorm WarningPIHTeton23 min
Jul 3, 1:32 PM MDTSevere Thunderstorm WarningPIHBannock, Caribou43 min
Jul 3, 2:05 PM MDTSevere Thunderstorm WarningPIHBonneville, Caribou25 min
Jul 4, 5:40 PM MDTSevere Thunderstorm WarningPIHButte, Clark, Jefferson35 min
Jul 10, 8:11 PM MDTSevere Thunderstorm WarningOTXBonner37 min
Jul 20, 4:08 PM MDTSevere Thunderstorm Warning Considerable damage threatPIHBingham, Bonneville, Butte, Jefferson37 min
Jul 21, 5:06 PM MDTSevere Thunderstorm WarningPIHBannock, Bear Lake, Franklin24 min
Jul 21, 5:48 PM MDTSevere Thunderstorm WarningPIHBear Lake, Franklin14 min
Jul 23, 6:43 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Bonneville, Butte, Caribou, Power31 min
Jul 24, 7:00 PM MDTSevere Thunderstorm WarningPIHBannock, Caribou, Cassia, Franklin, Oneida, Power60 min
Jul 24, 8:38 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Bonneville, Caribou52 min
Jul 27, 4:19 PM MDTSevere Thunderstorm WarningPIHBannock, Bear Lake, Caribou26 min
Jul 27, 4:41 PM MDTSevere Thunderstorm WarningPIHBear Lake, Caribou34 min
Aug 5, 9:22 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville38 min
Aug 7, 3:58 PM MDTSevere Thunderstorm WarningBOIPayette, Washington47 min
Aug 7, 4:48 PM MDTSevere Thunderstorm WarningBOIAda, Gem27 min
Aug 8, 1:32 AM MDTSevere Thunderstorm WarningPIHCaribou25 min
Aug 22, 4:56 PM MDTSevere Thunderstorm WarningBOIWashington49 min
Aug 22, 8:46 PM MDTSevere Thunderstorm WarningBOIBoise, Elmore44 min
Aug 26, 1:50 PM MDTSevere Thunderstorm WarningPIHFremont25 min
Aug 29, 5:10 PM MDTSevere Thunderstorm WarningMSOClearwater, Idaho35 min
Aug 29, 5:55 PM MDTSevere Thunderstorm WarningMSOIdaho35 min
Aug 29, 6:59 PM MDTSevere Thunderstorm WarningPIHClark, Jefferson46 min
Sep 1, 3:44 PM MDTSevere Thunderstorm WarningPIHFremont23 min
Sep 1, 8:20 PM MDTSevere Thunderstorm WarningBOIJerome, Twin Falls22 min
Sep 3, 1:25 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville, Jefferson, Madison44 min
Sep 3, 5:43 PM MDTSevere Thunderstorm WarningPIHBannock, Caribou, Franklin32 min
Sep 3, 5:54 PM MDTSevere Thunderstorm WarningPIHBear Lake, Franklin34 min
Sep 3, 6:20 PM MDTSevere Thunderstorm WarningPIHBannock, Caribou, Franklin, Oneida40 min
Sep 13, 2:44 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville, Jefferson31 min
Sep 20, 4:02 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Caribou26 min

By county

Every county with at least one alert. A county page lists each alert that covered it.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordThe radar archive20222024

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.