Alert archive / Arkansas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 9, NWS Tulsa, OK

February 9, 2001Benton County, Arkansas; Delaware County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 9, 2001, 3:41 AM CST for Benton County, Arkansas; Delaware County, Oklahoma. 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
Feb 9, 2001, 3:41 AM CST (09:41 UTC)
Expired
Feb 9, 2001, 4:30 AM CST
In force
49 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Benton County, AR, Delaware County, OK

The radar

The Tulsa radar (KINX), 100 km from the middle of the area, began a volume at 09:42 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
Feb 9, 4:20 AM CSTThunderstorm WindGentry, ARThunderstorm winds blew the roof off a barn.

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 watch it was issued in

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

IssuedProductOfficeLasted
Feb 9, 2:45 AM CSTTornado WatchSPC4 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 9.7 hours before the alert went out and 83 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 00:00Z on 2001-02-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 69 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 00:00Z on 2001-02-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 362 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
69 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
556 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
362 m²/s²
0-3 km storm-relative helicity
399 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.

000 
WUUS54 KTSA 090942
SVRTUL
ARC007-OKC041-091030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
341 AM CST FRI FEB 9 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DELAWARE COUNTY IN NORTHEAST OKLAHOMA
  BENTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 430 AM CST

* AT 341 AM CST...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 4 MILES WEST OF JAY TO 6 MILES NORTH OF
  KANSAS TO 2 MILES SOUTH OF TWIN OAKS...MOVING EAST AT 60 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...GARFIELD...
  BELLA VISTA...HIWASSE...DECATUR...WAR EAGLE...CAVE SPRINGS...
  HIGHFILL...SPRINGTOWN...GATEWAY...PEA RIDGE...GRAVETTE...
  MAYSVILLE...GENTRY...LOWELL...ROGERS...BENTONVILLE...COLCORD...
  KANSAS...TWIN OAKS AND JAY.

DAMAGING WINDS MAY OCCUR UP TO 10 MILES AHEAD OF THE HEAVY RAIN
AND HAIL. MOVE TO A SAFE PLACE NOW.

A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY
FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS.

LAT...LON 3652 9494 3629 9485 3618 9489 3626 9392
          3649 9386 3653 9399
x

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 9, 4:15 AM CSTSevere Thunderstorm WarningTSABenton, Carroll, Madison60 min
Feb 9, 4:15 AM CSTSevere Thunderstorm WarningTSAWashington60 min
Feb 9, 4:32 AM CSTSevere Thunderstorm WarningTSACrawford, Sebastian58 min
Feb 9, 4:32 AM CSTSevere Thunderstorm WarningTSAFranklin58 min
Feb 9, 5:13 AM CSTSevere Thunderstorm WarningTSACarroll, Madison32 min
Feb 9, 5:27 AM CSTSevere Thunderstorm WarningTSAFranklin, Sebastian48 min
Feb 9, 5:43 AM CSTSevere Thunderstorm WarningTSACarroll, Madison32 min
Feb 9, 1:59 AM CSTSevere Thunderstorm WarningTSAOkfuskee, Okmulgee46 min
Feb 9, 2:31 AM CSTSevere Thunderstorm WarningTSAOkmulgee, Tulsa, Wagoner44 min
Feb 9, 2:31 AM CSTSevere Thunderstorm WarningTSAMuskogee44 min
Feb 9, 3:01 AM CSTSevere Thunderstorm WarningTSAMayes29 min
Feb 9, 3:07 AM CSTSevere Thunderstorm WarningTSAChoctaw, Pushmataha53 min
Feb 9, 3:07 AM CSTSevere Thunderstorm WarningTSALatimer, Pittsburg53 min
Feb 9, 3:15 AM CSTSevere Thunderstorm WarningTSADelaware30 min
Feb 9, 3:25 AM CSTSevere Thunderstorm WarningTSAAdair, Cherokee50 min
Feb 9, 3:56 AM CSTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore, Pushmataha64 min
Feb 9, 3:56 AM CSTSevere Thunderstorm WarningTSAChoctaw64 min
Feb 9, 4:11 AM CSTSevere Thunderstorm WarningTSASequoyah49 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2001Severe Thunderstorm Warnings in Oklahoma, 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.