Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 190, NWS Tulsa, OK

May 23, 2001LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 23, 2001, 10:51 PM CDT for LeFlore County, Oklahoma. It was in force for 54 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: May 23, 2001, 10:51 PM CDT (03:51 UTC)
Expired: May 23, 2001, 11:45 PM CDT
In force: 54 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 44 km from the middle of the area, began a volume at 03:55 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
May 23, 11:24 PM CDT	Hail 0.75	Poteau, 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

Springfield, MO (KSGF), launched 00:00Z, 3.9 hours before the alert went out and 224 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: 120 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 2214 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 158 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.

000 
WUUS54 KTSA 240352
SVRTUL

OKC079-240445-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1051 PM CDT WED MAY 23 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  LE FLORE COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 1145 PM CDT

* AT 1051 PM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS     
  UP TO 70 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 19 MILES     
  NORTHWEST OF BOKOSHE TO 32 MILES WEST OF FANSHAWE...MOVING         
  SOUTHEAST AT 60 MPH.

IN ADDITION TO DAMAGING WINDS...DIME SIZE HAIL IS ALSO LIKELY WITH 
THESE STORMS.

THESE STORMS WILL AFFECT A LARGE PORTION OF THE WARNED AREA WIXTH
WIDESPREAD DAMAGING WINDS. PERSONS IN THESE AREAS SHOULD TAKE COVER
FROM THESE STORMS.

LAT...LON 3535 9482 3454 9496 3452 9449 3534 9445

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 May 23, 9:35 PM CDT, 1 hour 16 minutes earlier.

Area forecast discussion, May 23, 9:35 PM CDT, 1 hour 16 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
935 PM CDT WED MAY 23 2001

LONG-LIVED FAST-MOVING LP SUPERCELL JUST NOW EXITING THE EXTREME SRN
EXTEND OF OUR CWA AND HAS BEEN ON A WEAKENING TREND OVER THE PAST
HOUR.  RECEIVED SEVERAL REPORTS OF 60 MPH GUSTS/WIND DAMAGE ALONG
ITS PATH.

COLD FRONT IS ABOUT HALFWAY THROUGH ERN OK AT THIS TIME...WITH SCT
SHRA/TSRA ALONG AND BEHIND THIS BOUNDARY.  SHORTWAVE/SPEED MAX
CURRENTLY ROTATING THROUGH SERN KS AND WILL ENTER NE OK SHORTLY.
ALSO NOTED THAT SLIGHTLY HIGHER SFC DEWPOINTS ARE PUSHING INTO SERN
OK.  ISOLATED GUSTY WINDS WILL STILL BE POSSIBLE WITH THESE
STORMS...BUT LOSS OF HEATING SHUD RESULT IN A GRADUAL WEAKENING
TREND.  WILL KEEP AN EYE ON IT.

WILL HAVE AN UPDATED ZONE PACKAGE OUT BETWEEN 945-1000 PM.

FCSTID = 18

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

In the hours before

Special weather statement, May 23, 7:45 PM CDT, 3 hours 6 minutes before

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211100-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
745 PM CDT WED MAY 23 2001

...ISOLATED SEVERE THUNDERSTORMS POSSIBLE THIS EVENING ACROSS
EASTERN OKLAHOMA AND NORTHWEST ARKANSAS...

ISOLATED THUNDERSTORMS HAVE RAPIDLY DEVELOPED THIS EVENING ALONG A
COLD FRONT PUSHING SOUTH INTO NORTHEAST OKLAHOMA.  SOME OF THESE
STORMS HAVE ALREADY REACHED SEVERE LEVELS WITH DIME SIZE HAIL AND
DAMAGING WINDS REPORTED IN CREEK AND OKFUSKEE COUNTIES.  THE THREAT
FOR ISOLATED SEVERE STORMS WILL CONTINUE THROUGH THE EVENING
HOURS...MAINLY SOUTH OF INTERSTATE 44. THESE STORMS WILL BE CAPABLE
OF PRODUCING DIME SIZE HAIL AND WIND GUSTS TO 60 MPH. THE
THUNDERSTORM ACTIVITY SHOULD BEGIN TO DECREASE IN COVERAGE AND
INTENSITY BY LATE EVENING...WITH THE LOSS OF DAYTIME HEATING.

.SPOTTER ACTIVATION...
SPOTTER ACTIVATION WILL NOT BE REQUIRED GIVEN THE ISOLATED NATURE OF
THE SEVERE STORMS EXPECTED.

THREAT TABLE
VALID THROUGH 1200 UTC MONDAY

AREA 1...MUCH OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS
THUNDERSTORM PROBABILITY...20
SEVERE PROBABILITY IF STORMS OCCUR...40
SIGNIFICANT SEVERE PROBABILITY IF STORMS OCCUR...5

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

RELATED GRAPHICAL INFORMATION CAN BE FOUND AT:
WWW.SRH.NOAA.GOV/TULSA.

Local storm report, May 23, 9:47 PM CDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
947 PM CDT WED MAY 23 2001

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

0700 PM    BRISTOW                   OK    60 MPH TSTM GUST
05/23/01   CREEK                           SOME TREE DAMAGE

0715 PM    5 NE WELTY                OK    .75 INCH HAIL
05/23/01   OKFUSKEE

0830 PM    HARTSHORNE                OK    60 MPH TSTM GUST
05/23/01   PITTSBURG

0830 PM    DAMON                     OK    60 MPH TSTM GUST
05/23/01   LATIMER

Local storm report, May 23, 9:59 PM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
959 PM CDT WED MAY 23 2001

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

0746 PM    HANNA                     OK    WIND DAMAGE
05/23/01   MCINTOSH                        ROOF BLOWN OFF BARN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 7:26 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okmulgee	49 min
May 23, 7:49 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	56 min
May 23, 8:15 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	45 min
May 23, 10:16 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	44 min
May 23, 10:24 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	51 min
May 23, 10:28 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Pittsburg, Sequoyah	62 min
May 23, 10:45 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	45 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.