Alert archive / Utah / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 90, NWS Salt Lake City, UT

October 6, 2010Kane County, San Juan County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Oct 6, 2010, 9:18 AM MDT for Kane County, San Juan County, Utah. It was in force for 42 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, 9:18 AM MDT (15:18 UTC)
Expired: Oct 6, 2010, 10:00 AM MDT
In force: 42 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon

Counties Kane County, UT, San Juan County, UT

The radar

The Cedar City radar (KICX), 178 km from the middle of the area, began a volume at 15:21 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 3.3 hours before the alert went out and 262 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: 376 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 286 m²/s²
0-3 km storm-relative helicity: 320 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.8

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, 3 hours 58 minutes earlier.

Area forecast discussion, Oct 6, 5:20 AM MDT, 3 hours 58 minutes before

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Hazardous weather outlook, Oct 6, 5:51 AM MDT, 3 hours 27 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, 9:54 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, 3:15 PM MDT	Severe Thunderstorm Warning	SLC	Carbon, Duchesne	27 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.