Alert archive / Arkansas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 114, NWS Memphis, TN

May 8, 2009Clay County, Randolph County, Arkansas

NWS Memphis, TN issued this severe thunderstorm warning at May 8, 2009, 2:33 PM CDT for Clay County, Randolph County, Arkansas. It was in force for 27 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
May 8, 2009, 2:33 PM CDT (19:33 UTC)
Expired
May 8, 2009, 3:00 PM CDT
In force
27 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon

Counties Clay County, AR, Randolph County, AR

The radar

The Memphis radar (KNQA), 136 km from the middle of the area, began a volume at 19:33 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 8, 9:21 AM CDTTornado WatchSPC7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 7.6 hours before the alert went out and 183 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-pSkew-T log-p diagram, Little Rock, AR at 12:00Z on 2009-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1297 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 12:00Z on 2009-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1297 J/kg
Mixed-layer CIN
-163 J/kg
Mixed-layer LCL
606 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.1

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 Memphis, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at May 8, 12:39 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, May 8, 12:39 PM CDT, 1 hour 54 minutes before
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Hazardous weather outlook, May 8, 12:10 PM CDT, 2 hours 23 minutes before
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In the hours before

Special weather statement, May 8, 11:48 AM CDT, 2 hours 45 minutes before
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Local storm report, May 8, 11:56 AM CDT, 2 hours 37 minutes before
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Special weather statement, May 8, 11:58 AM CDT, 2 hours 35 minutes before
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Local storm report, May 8, 1:17 PM CDT, 1 hour 16 minutes before
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Special weather statement, May 8, 1:35 PM CDT, 58 minutes before
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Special weather statement, May 8, 1:59 PM CDT, 34 minutes before
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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 8, 11:29 AM CDTSevere Thunderstorm WarningMEGLake31 min
May 8, 5:03 PM CDTSevere Thunderstorm WarningMEGDyer, Lauderdale27 min
May 8, 5:29 PM CDTSevere Thunderstorm WarningMEGDyer, Haywood, Lauderdale46 min
May 8, 9:16 AM CDTRiver Flood WarningMEGClay, Greene36 hr
May 8, 9:46 AM CDTSevere Thunderstorm WarningMEGClay, Craighead, Greene, Lawrence, Randolph44 min
May 8, 11:01 AM CDTSevere Thunderstorm WarningMEGClay29 min
May 8, 11:12 AM CDTSevere Thunderstorm WarningMEGClay, Greene, Mississippi33 min
May 8, 3:12 PM CDTSevere Thunderstorm WarningMEGClay, Greene, Randolph33 min
May 8, 3:43 PM CDTSevere Thunderstorm WarningMEGClay, Craighead, Greene, Mississippi47 min
May 8, 4:29 PM CDTSevere Thunderstorm WarningMEGCraighead, Greene, Mississippi46 min
May 8, 4:55 PM CDTFlash Flood WarningMEGClay, Greene2 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2009Every severe thunderstorm warning in 2009

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.