Alert archive / Arkansas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 318, NWS Tulsa, OK

August 10, 2001Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 10, 2001, 3:11 PM CDT for Washington County, Arkansas. It was in force for 49 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Aug 10, 2001, 3:11 PM CDT (20:11 UTC)
Expired
Aug 10, 2001, 4:00 PM CDT
In force
49 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Washington County, AR

The radar

The Western Arkansas radar (KSRX), 69 km from the middle of the area, began a volume at 20:25 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.

What was reported inside it

TimeReportWhereRemark
Aug 10, 3:15 PM CDTHail 1Winslow, AR

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.2 hours before the alert went out and 117 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, Springfield, MO at 12:00Z on 2001-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 904 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, Springfield, MO at 12:00Z on 2001-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 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
904 J/kg
Mixed-layer CIN
-202 J/kg
Mixed-layer LCL
1255 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
-86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

141 
WUUS54 KTSA 102012
SVRTUL
ARC143-102100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
311 PM CDT FRI AUG 10 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 400 PM CDT

* AT 311 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4   
MILES SOUTH OF WEST FORK.  LITTLE MOVEMENT WAS DETECTED WITH THIS 
STORM.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BRENTWOOD...
  BLACKBURN...ELKINS...WEST FORK AND WINSLOW.

HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 70 MPH CAN BE EXPECTED IN
THE WARNED AREA.

LAT...LON 3595 9436 3576 9428 3579 9396 3603 9400

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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 10, 10:15 AM CDT, 4 hours 56 minutes earlier.

Area forecast discussion, Aug 10, 10:15 AM CDT, 4 hours 56 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1015 AM CDT FRI AUG 10 2001

LATEST VISIBLE SATELLITE IMAGERY SHOWING PARTLY CLOUDY SKIES AT BEST
ACROSS THE CWA AT THIS TIME.  THIS WILL ALLOW TEMPS TO GET A GOOD
HEAD START SO WILL BUMP THEM UP A BIT MAINLY ACROSS THE SOUTHEAST
HALF.  NEAR THE FRONT...TEMPS ARE WARMING MUCH SLOWER SO WE MAY BE
O.K. THERE.  FEEL THAT CLOUDS WILL REDEVELOP AS HEATING TAKES PLACE
SO WILL GO WITH BECOMING MOSTLY CLOUDY WORDING ACROSS THE NORTHERN
ZONES.  KEPT PRECIP CHANCES ABOUT THE SAME WITH SCATTERED CONVECTION
LIKELY TO POP UP ANYWHERE.  UPDATE OUT ON THE HEELS OF THE
DISCUSSION.

HOWIESON
FCSTID = 44

.TSA...
AR...NONE.
OK...NONE.

In the hours before

Local storm report, Aug 10, 1:08 PM CDT, 2 hours 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
108 PM CDT FRI AUG 10 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0740 PM    1 N BLUEJACKET            OK    WIND DAMAGE
08/09/01   CRAIG                           TRAILER HOUSE ELEVATED
                                           FOR TRANSPORTING ROLLED
                                           OVER AND TREE DAMAGE
                                           RPTD BY EM.

TL

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 10, 3:41 PM CDTFlash Flood WarningTSAWashington2 hr
Aug 10, 4:10 PM CDTSevere Thunderstorm WarningTSAWashington50 min
Aug 10, 5:56 PM CDTSevere Thunderstorm WarningTSAFranklin49 min
Aug 10, 6:01 PM CDTSevere Thunderstorm WarningTSACarroll44 min
Aug 10, 6:30 PM CDTFlash Flood WarningTSAFranklin2 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2001Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.