Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 326, NWS Tulsa, OK

August 10, 2001Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 10, 2001, 6:26 PM CDT for Okfuskee 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: Aug 10, 2001, 6:26 PM CDT (23:26 UTC)
Expired: Aug 10, 2001, 7:15 PM CDT
In force: 49 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Okfuskee County, OK

The radar

The Norman radar (KTLX), 78 km from the middle of the area, began a volume at 23:26 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

Time	Report	Where	Remark
Aug 10, 6:30 PM CDT	Hail 0.75	Mason, OK

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

Norman, OK (KOUN), launched 12:00Z, 11.4 hours before the alert went out and 93 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 343 J/kg
Mixed-layer CIN: -204 J/kg
Mixed-layer LCL: 1575 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -98 m²/s²
0-3 km storm-relative helicity: -119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

491 
WUUS54 KTSA 102328
SVRTUL
OKC107-110015-

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN OKFUSKEE COUNTY IN EAST CENTRAL OKLAHOMA

* UNTIL 715 PM CDT

* AT 626 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4   
MILES SOUTH OF WELTY...MOVING NEARLY STATIONARY.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...WELTY...BOLEY
  AND CASTLE.

HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 70 MPH CAN BE 
EXPECTED IN THE WARNED AREA. EXTREMELY HEAVY RAINFALL CAN ALSO BE 
EXPECTED IN THIS AREA...RADAR IS ESTIMATING 3 TO 5 INCHES OF 
RAINFALL SINCE 530 PM. DO NOT DRIVE INTO WATER OF UNKNOWN DEPTH

LAT...LON 3562 9659 3545 9656 3547 9631 3565 9628

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, 3:30 PM CDT, 2 hours 56 minutes earlier.

Area forecast discussion, Aug 10, 3:30 PM CDT, 2 hours 56 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
330 PM CDT FRI AUG 10 2001

THUNDERSTORMS DEVELOPING ACROSS THE CWA AT THIS TIME.  TEMPERATURES
CLIMBED QUITE NICELY TODAY AS SKIES REMAINED PARTLY CLOUDY INSTEAD
OF MOSTLY CLOUDY.  FRONT STALLED ACROSS NORTHERN PORTION OF CWA
DURING THE AFTERNOON HOURS.

FRONT POSITION SHOULD REMAIN ACROSS THE CWA TONIGHT MOVING A LITTLE
FURTHER SOUTH.  THIS WILL KEEP CHANCE POPS GOING FOR TONIGHT INTO
TOMORROW.  FRONTAL POSITION AND CLOUDS WILL REALLY PLAY INTO
TEMPERATURE FORECAST NEXT COUPLE OF DAYS AS WELL.  DRYING MOVING
INTO THE AREA ON SUNDAY FROM THE NORTH SO WILL BEGIN TO DRY THINGS
OUT.

EXTENDED STILL LOOKS DRY UNTIL THURSDAY INTO FRIDAY AS NEXT FRONTAL
SYSTEM MOVES SOUTH INTO THE AREA.  WILL INTRODUCE POPS ON FRIDAY FOR
NOW AS IT APPEARS TO BE THE MORE LIKELY DAY AT THIS TIME.

HOWIESON
FCSTID = 44

...PRELIMINARY NUMBERS CHANGES LIKELY...
TUL   70  92  71  93 /  30  30  20  20
FSM   71  93  71  95 /  40  40  30  20
MLC   71  94  72  94 /  40  40  30  20
BVO   66  89  67  90 /  30  30  20  10
FYV   65  87  66  89 /  30  30  20  20
BYV   65  87  66  89 /  30  30  20  20
MIO   67  88  67  87 /  30  30  20  20
MKO   70  92  71  93 /  30  30  20  20
F10   70  92  71  93 /  30  30  20  20
HHW   75  97  74  96 /  40  40  30  30

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

In the hours before

Local storm report, Aug 10, 1:08 PM CDT, 5 hours 18 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

Local storm report, Aug 10, 5:08 PM CDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
508 PM CDT FRI AUG 10 2001

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

0315 PM    WINSLOW                   AR    1 INCH HAIL
08/10/01   WASHINGTON

0420 PM    LINCOLN                   AR    WIND DAMAGE
08/10/01   WASHINGTON                      TREES BLOWN DOWN ON
                                           POWER LINES

0450 PM    9 E HALLETT               OK    .75 INCH HAIL
08/10/01   PAWNEE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 3:02 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee	43 min
Aug 10, 3:08 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee	52 min
Aug 10, 3:32 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	43 min
Aug 10, 4:03 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	42 min
Aug 10, 4:41 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee	49 min
Aug 10, 5:55 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	35 min
Aug 10, 6:12 PM CDT	Flash Flood Warning	TSA	Okfuskee	93 min
Aug 10, 6:58 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	47 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every 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.