Alert archive / Idaho / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 39, NWS Boise, ID

July 23, 2026Canyon County, Owyhee County, Idaho

NWS Boise, ID issued this severe thunderstorm warning at Jul 23, 2026, 5:55 PM MDT for Canyon County, Owyhee County, Idaho. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 23, 2026, 5:55 PM MDT (23:55 UTC)
Expired
Jul 23, 2026, 6:30 PM MDT
In force
35 min
Issued by
NWS Boise, ID
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Canyon County, ID, Owyhee County, ID

The radar

The Boise radar (KCBX), 46 km from the middle of the area, began a volume at 23:59 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Reno, NV (KREV), launched 12:00Z, 11.9 hours before the alert went out and 419 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Reno, NV at 12:00Z on 2026-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Reno, NV at 12:00Z on 2026-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2110 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
233 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The office that day

Everything else NWS Boise, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 22, 10:17 PM MDTSpecial Weather StatementBOI43 min
Jul 23, 2:12 PM MDTRed Flag WarningBOIAdams, Idaho, Owyhee, Twin Falls, Valley, Washington55 hr
Jul 23, 2:34 PM MDTSpecial Weather StatementBOI41 min
Jul 23, 3:17 PM MDTSpecial Weather StatementBOIAda43 min
Jul 23, 3:59 PM MDTSpecial Weather StatementBOI46 min
Jul 23, 5:12 PM MDTSpecial Weather StatementBOIAdams48 min
Jul 23, 5:27 PM MDTSevere Thunderstorm WarningBOICanyon, Owyhee33 min
Jul 23, 5:39 PM MDTSpecial Weather StatementBOIPayette36 min
Jul 22, 6:50 PM MDTSpecial Weather StatementBOIHarney40 min
Jul 22, 10:24 PM MDTSpecial Weather StatementBOIHarney51 min
Jul 23, 4:02 PM MDTSpecial Weather StatementBOIMalheur43 min
Jul 23, 4:40 PM MDTSpecial Weather StatementBOIBaker35 min
Jul 23, 4:44 PM MDTSpecial Weather StatementBOIMalheur46 min
Jul 23, 5:05 PM MDTSevere Thunderstorm WarningBOIMalheur25 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2026Every severe thunderstorm warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.