Alert archive / Oklahoma / Tornado Warnings in 1993

Tornado Warning 12, NWS Tulsa, OK

May 2, 1993Delaware County, Oklahoma

NWS Tulsa, OK issued this tornado warning at May 2, 1993, 7:48 PM CDT for Delaware County, Oklahoma. It was in force for 27 min.

The area

The counties it named.

The facts

Issued: May 2, 1993, 7:48 PM CDT (00:48 UTC)
Expired: May 2, 1993, 8:15 PM CDT
In force: 27 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Delaware County, OK

The nearest sounding before it

Springfield, MO (KUMN), launched 00:00Z, 0.8 hours before the alert went out and 105 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: 317 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 693 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 030050
TORTUL
OKC041-030115-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
748 PM CDT SUN MAY 2 1993
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST OKLAHOMA
 
   ...NORTHWESTERN DELAWARE COUNTY
 
AT 747 PM...NATIONAL WEATHER SERVICE RADAR INDICATED A POSSIBLE TORNADO
BETWEEN JAY AND KETCHUM. MOVEMENT OF THE STORM WAS NORTH AT 15 MPH.
 
 
WATCH FOR SIGNS OF DEVELOPING STORMS.  LARGE HAILSTONES AND UNUSUALLY
LOW SWIRLING CLOUDS ARE MANY TIMES SEEN NEAR DEVELOPING TORNADOES.
STRONG DAMAGING WINDS AND TORNADOES OFTEN PRODUCE A LOUD ROARING
SOUND THAT CAN BE HEARD IN THE VICINITY OF STORMS. FREQUENT AND
DANGEROUS LIGHTNING OCCURS WITH MOST SEVERE THUNDERSTORMS.
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE IN THE
PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF AVAILABLE.
OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE.
STAY AWAY FROM OUTSIDE WALLS AND AVOID WINDOWS.  ABANDON CARS AND
MOBILE HOMES FOR A REINFORCED BUILDING OR GET IN A GROUND DEPRESSION.
 
KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at May 2, 3:36 PM CDT, 4 hours 12 minutes earlier.

Area forecast discussion, May 2, 3:36 PM CDT, 4 hours 12 minutes before

AREA FORECAST DISCUSSION FOR EASTERN OKLAHOMA
NATIONAL WEATHER SERVICE TULSA OK
335 PM CDT SUN MAY 2 1993

WEAK CDFNT LINGERS THRU ERN OK FROM JUST EAST OF BVO TO JUST WEST OF TUL
TO JUST WEST OF MLC AND SWD.  XPC TSTMS...PSBLY SVR...EAST OF THAT LINE.
GUID POPS POPS ARE ARND 50 PERCENT...BUT AMS HAS WARMED AND BECOME RATHER
UNSTABLE.  THAT SHOULD HELP DVLP NMRS RW/TRW TO DRIFT EWD ACRS AREA.
SO...WILL GO ABV GUID POPS FOR TNGT.

MODELS AGREE THAT 500 MB TROF WILL BE ON THE AR BDR BY 12Z.  THAT SHOULD
END PCPN OVER MOST OF THE AREA BEFORE 2ND PD.  WILL INCLUDE CHANCE OF
SPRINKLES IN ERN ZONES FOR MON MRNG...BUT 20 PERCENT CHANCE IN XTRM NERN
ZONE FOR WRAP-ARND SHOWERS.  OTRW...XPC CLDS TO THIN AND GENLY DSIPT
LATE MONDAY.  MOS TEMPS LOOK RSNBL...XCP LOWS TUE MRNG LOOK TOO HIGH FOR
THE FIRST NIGHT WITH FAIR SKIES AND GOOD RADIATION.  WILL SHADE THOSE
TEMPS DOWN A BIT.

TUL 053/071 054 080 4100
MLC 054/072 053 081 5100
BVO 050/069 05"0 080 5100
IDB 057/073 054 081 6100

...02...

.OK...NONE.

In the hours before

Special weather statement, May 2, 4:05 PM CDT, 3 hours 43 minutes before

OKZ026-027-029-030-031-033-022200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
405 PM CDT SUN MAY 2 1993

..THUNDERSTORMS DEVELOPING IN EAST CENTRAL OKLAHOMA...

AT 358 PM...NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF SHOWERS
AND THUNDERSTORMS ACROSS NORTHEAST AND EAST CENTRAL OKLAHOMA. THE
STRONGEST THUNDERSTORM WAS NEAR CROWDER AND WILL MOVE INTO SOUTHERN
MCINTOSH COUNTY BY 410 PM. THIS STORM WILL BE CAPABLE OF PRODUCING
FREQUENT LIGHTNING...HEAVY RAINFALL...AND SMALL HAIL.

OTHER THUNDERSTORMS WERE OVER OKMULGEE...SOUTHWEST WAGONER COUNTIES AS
WELL AS SOUTHEAST TULSA COUNTY NEAR BROKEN ARROW.

MOVEMENT WAS NORTH AT 20 MILES AN HOUR.

STAY TUNED TO THIS STATION FOR FURTHERT UPDATES FROM THE NATIONAL
WEATHER SERVICE.

Special weather statement, May 2, 4:05 PM CDT, 3 hours 43 minutes before

OKZ026-027-029-030-031-033-022200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
405 PM CDT SUN MAY 2 1993

..THUNDERSTORMS DEVELOPING IN EAST CENTRAL OKLAHOMA...

AT 358 PM...NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF SHOWERS
AND THUNDERSTORMS ACROSS NORTHEAST AND EAST CENTRAL OKLAHOMA. THE
STRONGEST THUNDERSTORM WAS NEAR CROWDER AND WILL MOVE INTO SOUTHERN
MCINTOSH COUNTY BY 410 PM. THIS STORM WILL BE CAPABLE OF PRODUCING
FREQUENT LIGHTNING...HEAVY RAINFALL...AND SMALL HAIL.

OTHER THUNDERSTORMS WERE OVER OKMULGEE...SOUTHWEST WAGONER COUNTIES AS
WELL AS SOUTHEAST TULSA COUNTY NEAR BROKEN ARROW.

MOVEMENT WAS NORTH AT 20 MILES AN HOUR.

STAY TUNED TO THIS STATION FOR FURTHERT UPDATES FROM THE NATIONAL
WEATHER SERVICE.

Local storm report, May 2, 6:25 PM CDT, 1 hour 23 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
625 PM CDT SUN MAY 2 1993

TIME (CDT)      COUNTY       EVENT

500 PM         TULSA         65 MPH WINDS AND DIME SIZE HAIL AT
                             61ST AND YALE

510 PM         TULSA         DIME SIZE HAIL AT 31ST AND HARVARD

545 PM         WAGONER       DIME SIZE HAIL 6 MILES WEST OF INOLA
                             ON HIGHWAY 412

545 PM         ROGERS        DIME SIZE HAIL 5 MILES SOUTHEAST OF
                             VERDIGRIS ON HIGHWAY 412

530 PM         MUSKOGEE      NICKEL SIZE HAIL 6 MILES NORTHEAST OF
                             BOYNTON

450 PM         MCINTOSH      DIME SIZE HAIL AND A FUNNEL CLOUD REPORTED
                             5 MILES SOUTHWEST OF CHECOTAH

600 PM         WAGONER       NICKEL SIZE HAIL 1 MILE WEST OF PORTER

Local storm report, May 2, 6:25 PM CDT, 1 hour 23 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
625 PM CDT SUN MAY 2 1993

TIME (CDT)      COUNTY       EVENT

500 PM         TULSA         65 MPH WINDS AND DIME SIZE HAIL AT
                             61ST AND YALE

510 PM         TULSA         DIME SIZE HAIL AT 31ST AND HARVARD

545 PM         WAGONER       DIME SIZE HAIL 6 MILES WEST OF INOLA
                             ON HIGHWAY 412

545 PM         ROGERS        DIME SIZE HAIL 5 MILES SOUTHEAST OF
                             VERDIGRIS ON HIGHWAY 412

530 PM         MUSKOGEE      NICKEL SIZE HAIL 6 MILES NORTHEAST OF
                             BOYNTON

450 PM         MCINTOSH      DIME SIZE HAIL AND A FUNNEL CLOUD REPORTED
                             5 MILES SOUTHWEST OF CHECOTAH

600 PM         WAGONER       NICKEL SIZE HAIL 1 MILE WEST OF PORTER

Local storm report, May 2, 7:34 PM CDT, 14 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
735 PM CDT SUN MAY 2 1993

TIME (CDT)      COUNTY       EVENT

632 PM          MAYES        NICKEL SIZE HAIL AT ADAIR

648 PM          MAYES        GOLFBALL SIZE HAIL 4 MILES NORTH OF ADAIR

639 PM          LATIMER      GOLFBALL SIZE HAIL 2 MILES WEST OF
                             WILBURTON

658 PM          MAYES        QUARTER SIZE HAIL 4.5 MILES NORTH OF ADAIR
                             ON HIGHWAY 69

710 PM          CRAIG        DIME SIZE HAIL AT WHITE OAK

650 PM          CRAIG        GOLFBALL SIZE HAIL 2 MILES SOUTHWEST
                             OF BIG CABIN

Local storm report, May 2, 7:35 PM CDT, 13 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
735 PM CDT SUN MAY 2 1993

TIME (CDT)      COUNTY       EVENT

632 PM          MAYES        NICKEL SIZE HAIL AT ADAIR

648 PM          MAYES        GOLFBALL SIZE HAIL 4 MILES NORTH OF ADAIR

639 PM          LATIMER      GOLFBALL SIZE HAIL 2 MILES WEST OF
                             WILBURTON

658 PM          MAYES        QUARTER SIZE HAIL 4.5 MILES NORTH OF ADAIR
                             ON HIGHWAY 69

710 PM          CRAIG        DIME SIZE HAIL AT WHITE OAK

650 PM          CRAIG        GOLFBALL SIZE HAIL 2 MILES SOUTHWEST
                             OF BIG CABIN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 7:09 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	51 min
May 2, 7:12 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	33 min
May 2, 7:59 PM CDT	Severe Thunderstorm Warning	TSA	Craig	61 min
May 2, 8:15 PM CDT	Severe Thunderstorm Warning	TSA	Adair	60 min
May 2, 8:17 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	58 min
May 2, 8:31 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	59 min
May 2, 8:38 PM CDT	Flash Flood Warning	TSA	Craig	4 hr

Nearby

Tornado Warnings in Oklahoma, 1993 Every tornado warning in 1993 Tornadoes in 1993

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.