Alert archive / Idaho / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 19, NWS Boise, ID

June 24, 2020Payette County, Washington County, Idaho; Malheur County, Oregon

NWS Boise, ID issued this severe thunderstorm warning at Jun 24, 2020, 4:57 PM MDT for Payette County, Washington County, Idaho; Malheur County, Oregon. It was in force for 18 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
Jun 24, 2020, 4:57 PM MDT (22:57 UTC)
Expired
Jun 24, 2020, 5:15 PM MDT
In force
18 min
Issued by
NWS Boise, ID
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

Counties Payette County, ID, Washington County, ID, Malheur County, OR

The radar

The Boise radar (KCBX), 79 km from the middle of the area, began a volume at 23:01 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

Spokane, WA (KOTX), launched 12:00Z, 11.0 hours before the alert went out and 427 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, Spokane, WA at 12:00Z on 2020-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 25 joules per kilogram.LCLLFCEL10008507005003002001001 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, Spokane, WA at 12:00Z on 2020-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 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
25 J/kg
Mixed-layer CIN
-241 J/kg
Mixed-layer LCL
2149 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 2:52 PM MDTSpecial Weather StatementBOITwin Falls38 min
Jun 24, 4:21 PM MDTSevere Thunderstorm WarningBOIWashington39 min
Jun 24, 3:09 PM MDTSpecial Weather StatementBOIBaker51 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2020Severe Thunderstorm Warnings in Oregon, 2020Every severe thunderstorm warning in 2020

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.