Alert archive / Utah / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 98, NWS Salt Lake City, UT

October 6, 2010Carbon County, Duchesne County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Oct 6, 2010, 3:15 PM MDT for Carbon County, Duchesne County, Utah. 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: Oct 6, 2010, 3:15 PM MDT (21:15 UTC)
Expired: Oct 6, 2010, 3:42 PM MDT
In force: 27 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon

Counties Carbon County, UT, Duchesne County, UT

The radar

The Salt Lake City radar (KMTX), 218 km from the middle of the area, began a volume at 21:16 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 6, 10:29 AM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 9.3 hours before the alert went out and 196 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: 145 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1023 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Salt Lake City, UT wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 6, 5:20 AM MDT, 9 hours 55 minutes earlier.

Area forecast discussion, Oct 6, 5:20 AM MDT, 9 hours 55 minutes before

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Hazardous weather outlook, Oct 6, 11:30 AM MDT, 3 hours 45 minutes before

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In the hours before

Special weather statement, Oct 6, 12:15 PM MDT, 3 hours before

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Local storm report, Oct 6, 12:35 PM MDT, 2 hours 40 minutes before

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Special weather statement, Oct 6, 1:39 PM MDT, 1 hour 36 minutes before

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Local storm report, Oct 6, 2:15 PM MDT, 1 hour before

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Local storm report, Oct 6, 2:53 PM MDT, 22 minutes before

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Special weather statement, Oct 6, 3:07 PM MDT, 8 minutes before

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The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 6, 9:18 AM MDT	Severe Thunderstorm Warning	SLC	Kane, San Juan	42 min
Oct 6, 9:54 AM MDT	Areal Flood Warning	SLC	Emery, Garfield, Iron, Kane, San Juan, Sanpete and 3 more	23 hr
Oct 6, 11:12 AM MDT	Severe Thunderstorm Warning	SLC	Kane, San Juan	48 min
Oct 6, 11:25 AM MDT	Tornado Warning	SLC	Kane, San Juan	20 min
Oct 6, 12:02 PM MDT	Severe Thunderstorm Warning	SLC	Garfield, Kane, San Juan	43 min
Oct 6, 12:15 PM MDT	Special Weather Statement	SLC	Wayne	45 min
Oct 6, 12:45 PM MDT	Severe Thunderstorm Warning	SLC	Garfield, San Juan, Wayne	60 min
Oct 6, 1:39 PM MDT	Special Weather Statement	SLC	Emery	36 min
Oct 6, 1:47 PM MDT	Severe Thunderstorm Warning	SLC	Emery, Wayne	43 min
Oct 6, 1:50 PM MDT	Severe Thunderstorm Warning	SLC	Emery	40 min
Oct 6, 2:29 PM MDT	Severe Thunderstorm Warning	SLC	Emery, Wayne	46 min
Oct 6, 2:29 PM MDT	Severe Thunderstorm Warning	SLC	Emery	61 min
Oct 6, 3:07 PM MDT	Special Weather Statement	SLC	Carbon	38 min
Oct 6, 3:56 PM MDT	Special Weather Statement	SLC	Box Elder, Davis, Salt Lake, Tooele	94 min
Oct 6, 4:21 PM MDT	Special Weather Statement	SLC	Iron	24 min

Nearby

Severe Thunderstorm Warnings in Utah, 2010 Every 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.