Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 212, NWS Tulsa, OK

May 9, 1998Haskell County, Latimer County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 9, 1998, 3:44 PM CDT for Haskell County, Latimer County, Oklahoma. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 9, 1998, 3:44 PM CDT (20:44 UTC)
Expired
May 9, 1998, 4:45 PM CDT
In force
61 min
Issued by
NWS Tulsa, OK
Area
Whole counties

Counties Haskell County, OK, Latimer County, OK

The radar

The Western Arkansas radar (KSRX), 79 km from the middle of the area, began a volume at 20:46 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 12:00Z, 8.7 hours before the alert went out and 202 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 12:00Z on 1998-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 208 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 12:00Z on 1998-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 589 square meters per square second.1939587897117Sfc1 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
208 J/kg
Mixed-layer CIN
-208 J/kg
Mixed-layer LCL
773 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
589 m²/s²
0-3 km storm-relative helicity
623 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.5

Open this sounding in Storm Lab

The text

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

379 
WUUS54 KTSA 092045 RRA
SVRTUL
OKC061-077-092145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
344 PM CDT SAT MAY 9 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  HASKELL COUNTY - SOUTHEASTERN OKLAHOMA
  LATIMER COUNTY - SOUTHEASTERN OKLAHOMA

* UNTIL 445 PM CDT

* AT 344 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A LINE
  OF SEVERE THUNDERSTORMS 8 MILES WEST OF ENTERPRISE TO NEAR
  BLOCKER...MOVING EAST AT 25 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...
  ROBBERS CAVE STATE PARK
  KINTA
  STIGLER

  HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 60 MPH CAN BE
  EXPECTED IN THE WARNED AREA.

BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.

WHEN THUNDERSTORMS APPROACH...TAKE COVER INSIDE A STURDY BUILDING.
STAY AWAY FROM WINDOWS. TO PROTECT YOURSELF FROM LIGHTNING STAY OFF
THE PHONE AND DONT USE HAND HELD ELECTRICAL APPLIANCES. MOTORISTS
SHOULD NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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 9, 3:30 PM CDT, 14 minutes earlier.

Area forecast discussion, May 9, 3:30 PM CDT, 14 minutes before
FPUS3 KTUL 092034
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
330 PM CDT SAT MAY 9 1998

MID LVL LOW LOCATED JUST THE THE NW OF TUL...WITH CONVECTION FIRING
ACRS MUCH OF ERN OK IN RESPONSE TO COOLING TEMPS ALOFT/STEEPENING
LAPSE RATES.  WL CARRY HIGH CHC/LIKELY POPS FOR NE OK/NW AR INTO THE
EVENING...WITH ACTIVITY EXPECTED TO DIMINISH THIS EVENING AS UPR LOW
SHIFTS E AND HEATING SUBSIDES.

UPR LOW MVS TO E CST...ALLOWING UPR RDG TO BUILD ACRS SRN PLAINS FOR
SUN.  SFC RDG SETS UP ACRS AREA AS WELL...SO SHUD BE A PLEASANT DAY
WITH WARM TEMPS AND LGT WNDS.

NEXT UPR LOW MVS INTO GT BASIN SUN AND EVENTUALLY INTO CNTRL ROCKIES
SUN NGT.  AVN IS QUITE A BIT STRONGER THAN ETA/NGM THROUGH 48
HRS...AND KPS UPR LOW CLOSED OFF AS IT MVS INTO CNTRL PLAINS BY MON.
WL HOLD OFF ON PCPN FOR MON AS BEST LIFT/UPR DIVG REMAINS N OF
AREA...BUT WL INTRODUCE CHC POPS MON NGT AS SFC BNDRY APCHS.

FCSTID = 18
TUL   54  79  56  84 /  40   0   0  10
FSM   56  80  55  84 /  50   0   0  10
MLC   54  80  56  85 /  30   0   0  10
BVO   53  79  55  83 /  40   0   0  10
FYV   52  78  50  81 /  60   0   0  10
IDB   55  83  56  86 /  20   0   0  10
BYV   52  78  50  81 /  60   0   0  10
MIO   53  78  52  82 /  60   0   0  10
MKO   54  79  55  84 /  60   0   0  10
F10   54  79  56  84 /  40   0   0  10
HHW   55  83  56  86 /  20   0   0  10

.TUL...
OK...NONE.
AR...NONE.

In the hours before

Local storm report, May 9, 2:39 PM CDT, 1 hour 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
239 PM CDT SAT MAY 09 1998

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

0130 PM    ALTUS                     AR   .75 INCH HAIL
05/09/98   FRANKLIN
Special weather statement, May 9, 2:45 PM CDT, 59 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
245 PM CDT SAT MAY 9 1998

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS THROUGH THE EARLY EVENING HOURS.

AT MID AFTERNOON...LOW PRESSURE WAS LOCATED OVER SOUTHEAST OKLAHOMA WITH
A COLD FRONT TO ITS SOUTH ACROSS EASTERN TEXAS AND A WARM FRONT TO ITS
SOUTHEAST ACROSS SOUTHWEST ARKANSAS AND NORTHEAST LOUISIANA.
MEANWHILE...LOW PRESSURE IN THE UPPER ATMOSPHERE WAS LOCATED OVER NORTH
CENTRAL OKLAHOMA.  BOTH THE SURFACE AND UPPER ATMOSPHERIC SYSTEMS ARE
EXPECTED TO MOVE EAST THIS AFTERNOON AND EVENING AND SHOULD BE EAST OF
THE AREA BY LATE EVENING.

DUE TO THE VERY COLD AIR ALOFT ASSOCIATED WITH THE LOW PRESSURE IN THE
UPPER ATMOSPHERE ENOUGH INSTABILITY WILL EXIST FOR ISOLATED SEVERE
THUNDERSTORMS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSASv.  THE MAIN
THREAT WILL BE LARGE HAIL.  HOWEVER...DAMAGING WINDS CANNOT BE RULED OUT
AS WELL.

CIVIL DEFENSE AND SPOTTER GROUPS ACROSS EASTERN OKLAHOMA SHOULD MONITOR
THE LATEST WEATHER CONDTIONS AND BE PREPARED FOR POSSIBLE ACTIVATION.
Special weather statement, May 9, 2:45 PM CDT, 59 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
245 PM CDT SAT MAY 9 1998

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS THROUGH THE EARLY EVENING HOURS.

AT MID AFTERNOON...LOW PRESSURE WAS LOCATED OVER SOUTHEAST OKLAHOMA WITH
A COLD FRONT TO ITS SOUTH ACROSS EASTERN TEXAS AND A WARM FRONT TO ITS
SOUTHEAST ACROSS SOUTHWEST ARKANSAS AND NORTHEAST LOUISIANA.
MEANWHILE...LOW PRESSURE IN THE UPPER ATMOSPHERE WAS LOCATED OVER NORTH
CENTRAL OKLAHOMA.  BOTH THE SURFACE AND UPPER ATMOSPHERIC SYSTEMS ARE
EXPECTED TO MOVE EAST THIS AFTERNOON AND EVENING AND SHOULD BE EAST OF
THE AREA BY LATE EVENING.

DUE TO THE VERY COLD AIR ALOFT ASSOCIATED WITH THE LOW PRESSURE IN THE
UPPER ATMOSPHERE ENOUGH INSTABILITY WILL EXIST FOR ISOLATED SEVERE
THUNDERSTORMS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.  THE MAIN
THREAT WILL BE LARGE HAIL.  HOWEVER...DAMAGING WINDS CANNOT BE RULED OUT
AS WELL.

CIVIL DEFENSE AND SPOTTER GROUPS ACROSS EASTERN OKLAHOMA AND NORTHWEST
ARKANSAS SHOULD MONITOR THE LATEST WEATHER CONDTIONS AND BE PREPARED FOR
POSSIBLE ACTIVATION.
Special weather statement, May 9, 2:45 PM CDT, 59 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
245 PM CDT SAT MAY 9 1998

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS THROUGH THE EARLY EVENING HOURS.

AT MID AFTERNOON...LOW PRESSURE WAS LOCATED OVER SOUTHEAST OKLAHOMA WITH
A COLD FRONT TO ITS SOUTH ACROSS EASTERN TEXAS AND A WARM FRONT TO ITS
SOUTHEAST ACROSS SOUTHWEST ARKANSAS AND NORTHEAST LOUISIANA.
MEANWHILE...LOW PRESSURE IN THE UPPER ATMOSPHERE WAS LOCATED OVER NORTH
CENTRAL OKLAHOMA.  BOTH THE SURFACE AND UPPER ATMOSPHERIC SYSTEMS ARE
EXPECTED TO MOVE EAST THIS AFTERNOON AND EVENING AND SHOULD BE EAST OF
THE AREA BY LATE EVENING.

DUE TO THE VERY COLD AIR ALOFT ASSOCIATED WITH THE LOW PRESSURE IN THE
UPPER ATMOSPHERE ENOUGH INSTABILITY WILL EXIST FOR ISOLATED SEVERE
THUNDERSTORMS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSASv.  THE MAIN
THREAT WILL BE LARGE HAIL.  HOWEVER...DAMAGING WINDS CANNOT BE RULED OUT
AS WELL.

CIVIL DEFENSE AND SPOTTER GROUPS ACROSS EASTERN OKLAHOMA SHOULD MONITOR
THE LATEST WEATHER CONDTIONS AND BE PREPARED FOR POSSIBLE ACTIVATION.
Special weather statement, May 9, 2:45 PM CDT, 59 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
245 PM CDT SAT MAY 9 1998

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS THROUGH THE EARLY EVENING HOURS.

AT MID AFTERNOON...LOW PRESSURE WAS LOCATED OVER SOUTHEAST OKLAHOMA WITH
A COLD FRONT TO ITS SOUTH ACROSS EASTERN TEXAS AND A WARM FRONT TO ITS
SOUTHEAST ACROSS SOUTHWEST ARKANSAS AND NORTHEAST LOUISIANA.
MEANWHILE...LOW PRESSURE IN THE UPPER ATMOSPHERE WAS LOCATED OVER NORTH
CENTRAL OKLAHOMA.  BOTH THE SURFACE AND UPPER ATMOSPHERIC SYSTEMS ARE
EXPECTED TO MOVE EAST THIS AFTERNOON AND EVENING AND SHOULD BE EAST OF
THE AREA BY LATE EVENING.

DUE TO THE VERY COLD AIR ALOFT ASSOCIATED WITH THE LOW PRESSURE IN THE
UPPER ATMOSPHERE ENOUGH INSTABILITY WILL EXIST FOR ISOLATED SEVERE
THUNDERSTORMS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.  THE MAIN
THREAT WILL BE LARGE HAIL.  HOWEVER...DAMAGING WINDS CANNOT BE RULED OUT
AS WELL.

CIVIL DEFENSE AND SPOTTER GROUPS ACROSS EASTERN OKLAHOMA AND NORTHWEST
ARKANSAS SHOULD MONITOR THE LATEST WEATHER CONDTIONS AND BE PREPARED FOR
POSSIBLE ACTIVATION.
Local storm report, May 9, 3:35 PM CDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
335 PM CDT SAT MAY 09 1998

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

0330 PM    1 SW CROWDER              OK   1.00 INCH HAIL
05/09/98   PITTSBURG

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 8:15 AM CDTSevere Thunderstorm WarningTSACreek, Okfuskee45 min
May 9, 9:00 AM CDTSevere Thunderstorm WarningTSAOkfuskee45 min
May 9, 11:37 AM CDTSevere Thunderstorm WarningTSADelaware38 min
May 9, 11:54 AM CDTSevere Thunderstorm WarningTSAAdair21 min
May 9, 12:07 PM CDTSevere Thunderstorm WarningTSAAdair, Cherokee23 min
May 9, 12:43 PM CDTSevere Thunderstorm WarningTSASequoyah32 min
May 9, 1:45 PM CDTSevere Thunderstorm WarningTSAOkfuskee30 min
May 9, 3:04 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Pittsburg41 min
May 9, 3:46 PM CDTSevere Thunderstorm WarningTSAPittsburg29 min
May 9, 4:21 PM CDTSevere Thunderstorm WarningTSALeFlore54 min
May 9, 5:11 PM CDTSevere Thunderstorm WarningTSALeFlore34 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1998Every severe thunderstorm warning in 1998

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.