Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 421, NWS Memphis, TN

May 25, 2011Randolph County, Arkansas

NWS Memphis, TN issued this severe thunderstorm warning at May 25, 2011, 4:42 PM CDT for Randolph County, Arkansas. It was in force for 33 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 25, 2011, 4:42 PM CDT (21:42 UTC)
Expired
May 25, 2011, 5:15 PM CDT
In force
33 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon

County Randolph County, AR

The radar

The Memphis radar (KNQA), 180 km from the middle of the area, began a volume at 21:43 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 25, 12:28 PM CDTTornado Watch PDSSPC8 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 9.7 hours before the alert went out and 219 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 2011-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2124 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 2011-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 445 square meters per square second.1939587897Sfc1 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
2124 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
600 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
445 m²/s²
0-3 km storm-relative helicity
413 m²/s²
Significant tornado parameter
6.0
Supercell composite
20.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

248 
WUUS54 KMEG 252142
SVRMEG
ARC121-252215-
/O.NEW.KMEG.SV.W.0421.110525T2142Z-110525T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
442 PM CDT WED MAY 25 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN RANDOLPH COUNTY IN EASTERN ARKANSAS...

* UNTIL 515 PM CDT

* AT 442 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 24 MILES WEST OF
  ELM STORE...OR 34 MILES NORTHWEST OF BLACK ROCK...AND MOVING
  NORTHEAST AT 50 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ELM STORE
  AND WARM SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

.A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A STORM SHELTER OR SMALL INTERIOR ROOM.

.STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT SEVERE WEATHER ONLY...CALL 1 800 4 3 2 0 8 7 5.

&&

LAT...LON 3649 9142 3650 9141 3650 9139 3650 9103
      3649 9103 3637 9129 3642 9132 3642 9135
      3642 9136 3646 9137 3647 9140
TIME...MOT...LOC 2142Z 243DEG 44KT 3642 9155

$$
1 follow-up statement
977 
WWUS54 KMEG 252206
SVSMEG

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
506 PM CDT WED MAY 25 2011

ARC121-252215-
/O.CON.KMEG.SV.W.0421.000000T0000Z-110525T2215Z/
RANDOLPH AR-
506 PM CDT WED MAY 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHWESTERN RANDOLPH COUNTY...

AT 506 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
NORTHWEST OF ELM STORE...OR 25 MILES NORTHWEST OF POCAHONTAS...MOVING
NORTHEAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ELM STORE AND
WARM SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A STORM SHELTER OR SMALL INTERIOR ROOM.

.STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT SEVERE WEATHER ONLY...CALL 1 800 4 3 2 0 8 7 5.

&&

LAT...LON 3649 9142 3650 9141 3650 9139 3650 9103
      3649 9103 3637 9129 3642 9132 3642 9135
      3642 9136 3646 9137 3647 9140
TIME...MOT...LOC 2206Z 243DEG 44KT 3655 9122

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 3:30 AM CDTWind AdvisoryMEGClay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more16 hr
May 25, 2:29 PM CDTTornado WarningMEGRandolph31 min
May 25, 3:35 PM CDTSevere Thunderstorm WarningMEGLawrence, Randolph40 min
May 25, 3:41 PM CDTTornado WarningMEGLawrence, Randolph49 min
May 25, 3:55 PM CDTTornado WarningMEGLawrence, Randolph50 min
May 25, 4:22 PM CDTTornado WarningMEGCraighead, Greene, Lawrence38 min
May 25, 4:27 PM CDTSevere Thunderstorm WarningMEGClay, Randolph33 min
May 25, 4:44 PM CDTSevere Thunderstorm WarningMEGClay, Greene, Lawrence, Randolph46 min
May 25, 4:52 PM CDTTornado WarningMEGCraighead, Greene, Lawrence38 min
May 25, 4:52 PM CDTTornado WarningMEGCraighead, Crittenden, Cross, Poinsett38 min
May 25, 5:15 PM CDTSevere Thunderstorm WarningMEGClay45 min
May 25, 5:15 PM CDTTornado WarningMEGCross, Lee, St. Francis45 min
May 25, 5:22 PM CDTTornado WarningMEGCraighead, Cross, Poinsett38 min
May 25, 5:26 PM CDTTornado WarningMEGClay, Greene49 min
May 25, 5:54 PM CDTTornado WarningMEGCrittenden, Cross, St. Francis51 min
May 25, 5:57 PM CDTTornado WarningMEGCraighead, Mississippi, Poinsett48 min
May 25, 5:58 PM CDTSevere Thunderstorm WarningMEGCraighead, Greene, Mississippi47 min
May 25, 6:15 PM CDTSevere Thunderstorm WarningMEGRandolph30 min
May 25, 6:17 PM CDTSevere Thunderstorm WarningMEGLee, Phillips43 min
May 25, 6:37 PM CDTTornado WarningMEGCrittenden, St. Francis38 min
May 25, 6:39 PM CDTTornado WarningMEGMississippi51 min
May 25, 6:56 PM CDTSevere Thunderstorm WarningMEGLee, Phillips49 min
May 25, 6:58 PM CDTSevere Thunderstorm WarningMEGPhillips47 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2011Every severe thunderstorm warning in 2011

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.