Alert archive / Arkansas / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 429, NWS Memphis, TN

July 21, 2006Craighead County, Poinsett County, Arkansas

NWS Memphis, TN issued this severe thunderstorm warning at Jul 21, 2006, 3:34 PM CDT for Craighead County, Poinsett County, Arkansas. 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 counties it named.

The facts

Issued
Jul 21, 2006, 3:34 PM CDT (20:34 UTC)
Expired
Jul 21, 2006, 4:21 PM CDT
In force
47 min
Issued by
NWS Memphis, TN
Area
Counties, with a storm outline in the text

Counties Craighead County, AR, Poinsett County, AR

The radar

The Memphis radar (KNQA), 81 km from the middle of the area, began a volume at 20:36 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
Jul 21, 3:32 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 8.6 hours before the alert went out and 116 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 2006-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 496 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 2006-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 square meters per square second.1939Sfc1 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
496 J/kg
Mixed-layer CIN
-302 J/kg
Mixed-layer LCL
1949 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 Jul 21, 2:25 PM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, Jul 21, 2:25 PM CDT, 1 hour 9 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
225 PM CDT FRI JUL 21 2006

.DISCUSSION...

HEAT ADVISORY WILL BE EXTENDED UNTIL 700 PM CDT TONIGHT.

RELIEF FROM THE HOT AND HUMID TEMPERATURES WILL COME TONIGHT AS A
COLD FRONT MOVES SOUTHWARD INTO THE CWA. THE FRONT WILL BE THE
FOCUS OF SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. THERE
WILL BE PLENTY OF INSTABILITY AROUND AND A 500 MB JET WILL ALSO BE
ENTERING THE CWA AT THE TIME THUS SOME THUNDERSTORMS COULD BECOME
SEVERE WITH LARGE HAIL AND DAMAGING WINDS BEING THE MAIN THREAT
FROM THE STORMS. BEST CHANCES FOR RAIN TONIGHT WILL OCCUR
NORTHWEST OF A LINE FROM MEMPHIS TO JACKSON TENNESSEE.

BY SATURDAY...FRONT WILL SAG FURTHER SOUTH INTO THE CWA AND SHOULD
BE LOCATED SOUTH OF THE CWA BY 00Z SATURDAY NIGHT. EXPECT REMNANT
SHOWERS AND THUNDERSTORMS FROM TONIGHTS CONVECTION TO BE MOVING
THROUGH MUCH OF THE CWA IN THE MORNING. REDEVELOPMENT WILL OCCUR
DURING THE AFTERNOON HOURS AHEAD OF THE FRONT WHICH WILL PROBABLY BE
LOCATED ACROSS NORTHEAST MISSISSIPPI AT THIS TIME. A FEW OF THESE
STORMS COULD BECOME SEVERE IN THE AFTERNOON.

HIGH PRESSURE WILL FILTER INTO THE REGION SATURDAY NIGHT BRINGING
COOLER AND DRIER AIR TO THE REGION. THE HIGH WILL DOMINATE THE
WEATHER THROUGH TUESDAY. EXPECT HIGHS IN THE UPPER 80S WARMING TO
THE LOWER 90S BY TUESDAY AS THE HIGH SHIFTS EAST. LOWS WILL BE
MAINLY IN THE 60S AND 70S.

WEDNESDAY THROUGH FRIDAY...MOISTURE FROM THE GULF OF MEXICO WILL
RETURN TO THE REGION AND THIS WILL HELP TO SET OFF DIURNAL
AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS DURING THIS TIME.

&&

.PRELIMINARY POINT TEMPS/POPS...
MEM  75  88  67  88 /  50  50  10   0
MKL  72  86  62  86 /  50  50  10   0
JBR  71  86  63  88 /  60  30  10   0
TUP  76  91  68  89 /  20  50  20  10

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR CLAY-CRAIGHEAD-
     CRITTENDEN-CROSS-GREENE-LAWRENCE-LEE(AR)-MISSISSIPPI-
     PHILLIPS-POINSETT-RANDOLPH-ST. FRANCIS.

MO...HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR DUNKLIN-PEMISCOT.

MS...HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR ALCORN-BENTON(MS)-
     CALHOUN-CHICKASAW-COAHOMA-DESOTO-ITAWAMBA-LAFAYETTE-LEE(MS)-
     MARSHALL-MONROE-PANOLA-PONTOTOC-PRENTISS-QUITMAN-
     TALLAHATCHIE-TATE-TIPPAH-TISHOMINGO-TUNICA-UNION-YALOBUSHA.

TN...HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR CARROLL-CHESTER-
     CROCKETT-DECATUR-DYER-FAYETTE-GIBSON-HARDEMAN-HARDIN-
     HAYWOOD-HENDERSON-HENRY-LAKE-LAUDERDALE-MADISON-MCNAIRY-
     OBION-SHELBY-TIPTON-WEAKLEY.

&&

KRM
Hazardous weather outlook, Jul 21, 4:54 AM CDT, 10 hours 40 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 6:37 PM CDTSevere Thunderstorm WarningMEGClay29 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2006Every severe thunderstorm warning in 2006

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.