Alert archive / Utah / Areal Flood Warnings in 2012

Areal Flood Warning 40, NWS Salt Lake City, UT

January 19, 2012Cache County, Utah

NWS Salt Lake City, UT issued this areal flood warning at Jan 19, 2012, 7:12 PM MST for Cache County, Utah. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 19, 2012, 7:12 PM MST (02:12 UTC)
Expired: Jan 20, 2012, 4:00 AM MST
In force: 9 hr
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Flood severity: None

County Cache County, UT

The radar

The Salt Lake City radar (KMTX), 78 km from the middle of the area, began a volume at 02:14 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 00:00Z, 2.2 hours before the alert went out and 313 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: 2167 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 229 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 areal flood 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 areal flood warning went out at Jan 19, 3:58 PM MST, 3 hours 14 minutes earlier.

Area forecast discussion, Jan 19, 3:58 PM MST, 3 hours 14 minutes before

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Hazardous weather outlook, Jan 19, 4:30 PM MST, 2 hours 42 minutes before

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<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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
Jan 20, 2:57 PM MST	Winter Storm Warning	SLC		42 hr
Jan 20, 3:11 PM MST	High Wind Warning	SLC		28 hr
Jan 20, 3:11 PM MST	Wind Advisory	SLC		41 hr
Jan 20, 4:24 PM MST	Areal Flood Advisory	SLC	Cache	41 hr
Jan 20, 4:29 PM MST	Areal Flood Advisory	SLC	Weber	41 hr
Jan 20, 4:31 PM MST	Areal Flood Advisory	SLC	Morgan	41 hr

Nearby

Areal Flood Warnings in Utah, 2012 Every areal flood warning in 2012

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.