Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 340, NWS Tulsa, OK

August 15, 2001Haskell County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 15, 2001, 9:22 PM CDT for Haskell County, Oklahoma. It was in force for 38 min. No storm report in the archive falls 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.

The facts

Issued
Aug 15, 2001, 9:22 PM CDT (02:22 UTC)
Expired
Aug 15, 2001, 10:00 PM CDT
In force
38 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Haskell County, OK

The radar

The Western Arkansas radar (KSRX), 70 km from the middle of the area, began a volume at 02:24 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.4 hours before the alert went out and 206 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, Norman, OK at 00:00Z on 2001-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2066 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, Norman, OK at 00:00Z on 2001-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 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
2066 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1836 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
76 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.

538 
WUUS54 KTSA 160223
SVRTUL
OKC061-160300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
922 PM CDT WED AUG 15 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HASKELL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 1000 PM CDT

* AT 922 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2
  MILES EAST OF WHITEFIELD...MOVING EAST AT 40 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...KEOTA...
  WHITEFIELD...MC CURTAIN AND STIGLER.

WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA.

LAT...LON 3532 9528 3515 9528 3512 9493 3542 9490

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 15, 9:00 PM CDT, 22 minutes earlier.

Area forecast discussion, Aug 15, 9:00 PM CDT, 22 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
900 PM CDT WED AUG 15 2001

CONVECTION EXPECTED TO CONTINUR FROM NORTHWEST ARKANSAS TO SOUTHEAST
OKLAHOMA ALONG AND AHEAD OF THE COLD FRONT MOVING THROUGH THE AREA.
NEW MODELS NOT YET IN...BUT EXPECT FRONT TO SLOW AS IT GETS INTO
SOUTHEAST OKLAHOMA.  18Z MESOETA INDICATED AN INCREASE IN
PRECIPITATION OVER SOUTHEAST OKLAHOMA AFTER MIDNIGHT.  THIS APPEARS
REASONABLE AS CLOUD TOPS OVER OKFUSKEE AND HUGHES COUNTIES ARE
COOLING.  LOW LEVEL JET DOES NOT APPEAR ESPECIALLY STRONG...BUT IS
APPARENTLY SUFFICIENT TO BE INCREASING THE CONVECTION.  AIRMASS IS
SOMEWHAT UNSTABLE WITH CAPES AROUND 1000-1500 J/KG IN THAT AREA...SO
WILL MAINTAIN A CAREFUL WATCH.

DO NOT EXPECT ANY SIGNIFICANT PRECIPITATION NORTHWEST OF THE CURRENT
LINE OF CONVECTION...EXCEPT POSSIBLE SPRINKLES FROM REMAINS OF
EARLIER STORMS.  THERE IS CONSIDERABLE CLOUD TO GROUND LIGHTNING
ASSOCIATED WITH THE COLDER CLOUD TOPS FROM CHEROKEE COUNTY TO
PITTSBURG COUNTY AND SOUTHWEST.  HOWEVER ISOLATED STRIKES ARE
OCCURRING WELL BEHIND THE LINE...AS FAR BACK AS CLAREMORE IN THE
LAST FEW MINUTES.  LIGHTNING MAY BE THE GREATEST HAZARD FROM THESE
STORMS IN THE NEAR TERM.

WILL MAKE SOME ADJUSTMENTS TO POPS...BUT DO NOT ANTICIPATE ANY OTHER
SIGNIFICANT CHANGES.

FCSTID = 2

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

In the hours before

Local storm report, Aug 15, 5:44 PM CDT, 3 hours 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
544 PM CDT WED AUG 15 2001

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

0505 PM    MANNFORD                  OK    59 MPH TSTM GUST
08/15/01   CREEK                           PUBLIC REPORT.

0510 PM    5 W SAND SPGS             OK    60 MPH TSTM GUST
08/15/01   TULSA                           MEDIA REPORT.
Local storm report, Aug 15, 5:51 PM CDT, 3 hours 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
551 PM CDT WED AUG 15 2001

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

0545 PM    BROKEN ARROW              OK    70 MPH TSTM GUST
08/15/01   TULSA                           REPORT FROM EOC.
Local storm report, Aug 15, 6:26 PM CDT, 2 hours 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
626 PM CDT WED AUG 15 2001

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

0550 PM    1 N BROKEN ARROW          OK    60 MPH TSTM GUST
08/15/01   WAGONER                         INTERSECTION OF 40TH
                                           ST. AND 196TH E. AVE.
                                           PUBLIC REPORT.

0610 PM    JENKS                     OK    WIND DAMAGE
08/15/01   TULSA                           POWER POLE FELL ON A
                                           DAYCARE CENTER. SPOTTER
                                           REPORT.
Special weather statement, Aug 15, 7:00 PM CDT, 2 hours 22 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-161100-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
700 PM CDT WED AUG 15 2001

...ISOLATED SEVERE THUNDERSTORMS STILL POSSIBLE ACROSS EASTERN
OKLAHOMA AND NORTHWEST ARKANSAS TONIGHT...

STRONG TO SEVERE THUNDERSTORMS FORMED AHEAD OF THE COLD FRONT MOVING
INTO EASTERN OKLAHOMA DURING THE LATE AFTERNOON.  THUNDERSTORMS ARE
EXPECTED TO CONTINUE ALONG AND AHEAD OF THE COLD FRONT AS IT MOVES
TO THE SOUTHEAST.  THE FRONT IS EXPECTED TO REACH A LINE FROM NEAR
BERRYVILLE TO FORT SMITH TO MCALESTER BY AROUND MIDNIGHT. THE
ATMOSPHERE IS MORE STABLE IN FAR EASTERN OKLAHOMA AND NORTHWEST
ARKANSAS...SO THE GENERAL STRENGTH OF THUNDERSTORMS IS EXPECTED TO
GRADUALLY DIMINISH.  HOWEVER...ISOLATED SEVERE THUNDERSTORMS WILL
STILL BE POSSIBLE DURING THE NIGHT.

DAMAGING WINDS WILL BE THE MAIN THREAT FROM THE STORMS WITH THE
THREAT HIGHEST IN NORTHEAST OKLAHOMA BETWEEN 5PM AND 9PM AND IN
SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS AFTER 8PM.

.SPOTTER ACTIVATION...
SPOTTERS ACTIVATION MAY BE REQUIRED IN MUCH OF EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS TONIGHT SOUTHEAST OF A LINE FROM GROVE TO JUST
SOUTH OF TULSA TO BRISTOW.

.DISCUSSION...
THUNDERSTORMS MOVING ACROSS EASTERN OKLAHOMA ARE MOVING INTO MORE
STABLE AIR IN FAR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.  CAPE
VALUES IN THOSE AREAS ARE ONLY AROUND 800 TO 1200...BASED ON 23Z
DATA...WHICH IS CONSIDERABLY LOWER THAN THE 2000-3000 J/KG AIR THE
THUNDERSTORMS ENCOUNTERED EARLIER THIS AFTERNOON.  LOW LEVEL
SOUTHERLY WINDS ARE EXPECTED TO INCREASE LATER IN THE NIGHT...WHICH
WILL INCREASE THE THREAT OF SEVERE WEATHER LATER THIS EVENING AND
AFTER MIDNIGHT.

THREAT TABLE
VALID THROUGH 1200 UTC THURSDAY
AREA 1...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS
THUNDERSTORM PROBABILITY...100
SEVERE PROBABILITY IF STORMS OCCUR...30
SIGNIFICANT SEVERE PROBABILITY IF STORMS OCCUR...10

THREAT AREAS DEFINE THE GREATEST RISK. PROBABILITIES ARE IN PERCENT.
SIGNIFICANT SEVERE IS DEFINED AS F1 OR GREATER WIND/TORNADO DAMAGE
AND/OR GOLF BALL SIZE HAIL OR LARGER.

RELATED GRAPHICAL INFORMATION CAN BE FOUND AT: WWW.SRH.NOAA.GOV/TULSA
Local storm report, Aug 15, 8:06 PM CDT, 1 hour 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
806 PM CDT WED AUG 15 2001

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

0515 PM    TERLTON                   OK    WIND DAMAGE
08/15/01   PAWNEE                          TREES AND POWER LINES
                                           DOWN. REPORT FROM FIRE
                                           DEPT.
Local storm report, Aug 15, 9:12 PM CDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
912 PM CDT WED AUG 15 2001

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

0612 PM    PRYOR                     OK    WIND DAMAGE
08/15/01   MAYES                           TREES DOWN. EMERGENCY
                                           MANAGER

0625 PM    SALINA                    OK    60 MPH TSTM GUST
08/15/01   MAYES                           EMERGENCY MANAGER

Nearby

Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.