Alert archive / Idaho / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 36, NWS Pocatello, ID

August 19, 2007Fremont County, Madison County, Teton County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Aug 19, 2007, 1:31 PM MDT for Fremont County, Madison County, Teton County, Idaho. It was in force for 29 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: Aug 19, 2007, 1:31 PM MDT (19:31 UTC)
Expired: Aug 19, 2007, 2:00 PM MDT
In force: 29 min
Issued by: NWS Pocatello, ID
Area: Counties, with a storm outline in the text

Counties Fremont County, ID, Madison County, ID, Teton County, ID

The radar

The Pocatello radar (KSFX), 135 km from the middle of the area, began a volume at 19:33 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

Riverton, WY (KRIW), launched 12:00Z, 7.5 hours before the alert went out and 264 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2424 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pocatello, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 19, 8:55 AM MDT, 4 hours 36 minutes earlier.

Area forecast discussion, Aug 19, 8:55 AM MDT, 4 hours 36 minutes before

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Hazardous weather outlook, Aug 19, 4:03 AM MDT, 9 hours 28 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 3:34 AM MDT	Lake Wind Advisory	PIH		6 hr
Aug 19, 3:51 AM MDT	Red Flag Warning	PIH	Bannock, Bear Lake, Bingham, Bonneville, Butte, Caribou and 9 more	18 hr
Aug 19, 9:14 AM MDT	Wind Advisory	PIH		11 hr

Nearby

Severe Thunderstorm Warnings in Idaho, 2007 Every severe thunderstorm warning in 2007

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.