Alert archive / Arkansas / Areal Flood Warnings in 2012

Areal Flood Warning 1, NWS Memphis, TN

March 8, 2012Lake County, Obion County, Tennessee; 4 counties in Arkansas

NWS Memphis, TN issued this areal flood warning at Mar 8, 2012, 5:06 PM CST for Lake County, Obion County, Tennessee; 4 counties in Arkansas. It was in force for 6 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: Mar 8, 2012, 5:06 PM CST (23:06 UTC)
Expired: Mar 8, 2012, 11:00 PM CST
In force: 6 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Clay County, AR, Craighead County, AR, Greene County, AR, Lawrence County, AR, Lake County, TN, Obion County, TN

The radar

The Memphis radar (KNQA), 98 km from the middle of the area, began a volume at 23:07 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

Little Rock, AR (KLZK), launched 12:00Z, 11.1 hours before the alert went out and 152 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: 799 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 451 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 327 m²/s²
0-3 km storm-relative helicity: 474 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 10.2

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 Memphis, TN wrote its last area forecast discussion before this areal flood warning went out at Mar 8, 3:30 PM CST, 1 hour 36 minutes earlier.

Area forecast discussion, Mar 8, 3:30 PM CST, 1 hour 36 minutes before

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Hazardous weather outlook, Mar 8, 3:31 PM CST, 1 hour 35 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 Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 8, 4:54 PM CST	Severe Thunderstorm Warning	MEG	Calhoun, Lafayette, Panola, Yalobusha	51 min
Mar 8, 5:10 PM CST	Wind Advisory	MEG	Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more	5 hr
Mar 8, 5:23 PM CST	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw, Lafayette, Pontotoc, Yalobusha	52 min
Mar 8, 5:53 PM CST	Severe Thunderstorm Warning	MEG	Chickasaw, Itawamba, Lee, Monroe	52 min

Nearby

Areal Flood Warnings in Arkansas, 2012 Areal Flood Warnings in Tennessee, 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.