Alert archive / Idaho / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 40, NWS Pocatello, ID

July 31, 2010Custer County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Jul 31, 2010, 2:33 PM MDT for Custer County, Idaho. It was in force for 27 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 31, 2010, 2:33 PM MDT (20:33 UTC)
Expired
Jul 31, 2010, 3:00 PM MDT
In force
27 min
Issued by
NWS Pocatello, ID
Area
Storm-based polygon

County Custer County, ID

The radar

The Boise radar (KCBX), 177 km from the middle of the area, began a volume at 20:33 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, 8.6 hours before the alert went out and 418 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 2010-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 69 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 2010-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 square meters per square second.1939587897Sfc1 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
69 J/kg
Mixed-layer CIN
-264 J/kg
Mixed-layer LCL
2380 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 6:03 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Power27 min
Jul 30, 6:09 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville, Jefferson51 min
Jul 30, 6:34 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville41 min
Jul 31, 5:34 AM MDTRed Flag WarningPIHBingham, Bonneville, Butte, Clark, Fremont, Jefferson and 3 more16 hr
Jul 31, 6:50 AM MDTSpecial Weather StatementPIHFremont40 min
Jul 31, 9:03 AM MDTSpecial Weather StatementPIHLincoln57 min
Jul 31, 9:43 AM MDTSpecial Weather StatementPIHCuster62 min
Jul 31, 10:03 AM MDTSpecial Weather StatementPIHButte42 min
Jul 31, 10:46 AM MDTSpecial Weather StatementPIHJefferson44 min
Jul 31, 11:09 AM MDTSpecial Weather StatementPIHCuster51 min
Jul 31, 11:37 AM MDTSpecial Weather StatementPIHClark38 min
Jul 31, 12:13 PM MDTSpecial Weather StatementPIHFremont47 min
Jul 31, 1:18 PM MDTSevere Thunderstorm WarningPIHFremont, Teton27 min
Jul 31, 2:50 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Caribou40 min
Jul 31, 3:30 PM MDTSevere Thunderstorm WarningPIHBannock, Power30 min
Jul 31, 4:13 PM MDTSevere Thunderstorm WarningPIHBonneville32 min
Jul 31, 4:24 PM MDTSevere Thunderstorm WarningPIHBannock, Power41 min
Jul 31, 4:54 PM MDTSpecial Weather StatementPIHBonneville51 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2010Every severe thunderstorm warning in 2010

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.