Alert archive / Utah / Special Weather Statements in 2018

Special Weather Statement, NWS Salt Lake City, UT

May 30, 2018Box Elder County, Utah

NWS Salt Lake City, UT issued this special weather statement at May 30, 2018, 5:13 PM MDT for Box Elder County, Utah. It was in force for 47 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: May 30, 2018, 5:13 PM MDT (23:13 UTC)
Expired: May 30, 2018, 6:00 PM MDT
In force: 47 min
Issued by: NWS Salt Lake City, UT

County Box Elder County, UT

The radar

The Salt Lake City radar (KMTX), 34 km from the middle of the area, began a volume at 23:17 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

Elko, NV (KLKN), launched 12:00Z, 11.2 hours before the alert went out and 133 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: 1950 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 100 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 May 30, 3:25 PM MDT, 1 hour 48 minutes earlier.

Area forecast discussion, May 30, 3:25 PM MDT, 1 hour 48 minutes before

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Hazardous weather outlook, May 30, 8:05 AM MDT, 9 hours 8 minutes before

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In the hours before

Special weather statement, May 30, 3:09 PM MDT, 2 hours 4 minutes before

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Special weather statement, May 30, 3:48 PM MDT, 1 hour 25 minutes before

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Special weather statement, May 30, 4:29 PM MDT, 44 minutes before

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Special weather statement, May 30, 5:13 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
May 30, 1:49 PM MDT	Wind Advisory	SLC		31 hr
May 30, 3:09 PM MDT	Special Weather Statement	SLC		51 min
May 30, 3:48 PM MDT	Special Weather Statement	SLC	Box Elder	42 min
May 30, 4:29 PM MDT	Special Weather Statement	SLC	Box Elder	46 min
May 30, 5:55 PM MDT	Special Weather Statement	SLC	Box Elder	50 min

Nearby

Special Weather Statements in Utah, 2018 Every special weather statement in 2018

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.