Alert archive / Utah / Special Weather Statements in 2021

Special Weather Statement, NWS Salt Lake City, UT

July 21, 2021Piute County, Utah

NWS Salt Lake City, UT issued this special weather statement at Jul 21, 2021, 3:16 PM MDT for Piute County, Utah. 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 outline as issued.

The facts

Issued: Jul 21, 2021, 3:16 PM MDT (21:16 UTC)
Expired: Jul 21, 2021, 3:45 PM MDT
In force: 29 min
Issued by: NWS Salt Lake City, UT

County Piute County, UT

The radar

The Cedar City radar (KICX), 122 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 nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.3 hours before the alert went out and 242 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: 14 J/kg
Mixed-layer CIN: -235 J/kg
Mixed-layer LCL: 2473 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 21, 8:04 AM MDT, 7 hours 12 minutes earlier.

Area forecast discussion, Jul 21, 8:04 AM MDT, 7 hours 12 minutes before

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Hazardous weather outlook, Jul 21, 4:16 AM MDT, 11 hours before

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In the hours before

Local storm report, Jul 21, 11:18 AM MDT, 3 hours 58 minutes before

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Special weather statement, Jul 21, 1:45 PM MDT, 1 hour 31 minutes before

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Special weather statement, Jul 21, 3:13 PM MDT, 3 minutes before

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Special weather statement, Jul 21, 3:16 PM MDT, 0 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
Jul 21, 1:45 PM MDT	Special Weather Statement	SLC	Sevier	30 min
Jul 21, 3:13 PM MDT	Special Weather Statement	SLC	Sanpete	32 min

Nearby

Special Weather Statements in Utah, 2021 Every special weather statement in 2021

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.