Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 196, NWS Tulsa, OK

May 7, 1998Delaware County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 7, 1998, 7:40 PM CDT for Delaware County, Oklahoma. It was in force for 35 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 7, 1998, 7:40 PM CDT (00:40 UTC)
Expired
May 7, 1998, 8:15 PM CDT
In force
35 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Delaware County, OK

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.7 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 1998-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 199 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, Springfield, MO at 00:00Z on 1998-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -37 square meters per square second.1939587897117136156Sfc1 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
199 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1317 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
-37 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

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

825 
WUUS54 KTSA 080041
SVRTUL
OKC041-080115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
740 PM CDT THU MAY 7 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  SOUTHERN DELAWARE COUNTY - NORTHEASTERN OKLAHOMA

* UNTIL 815 PM CDT

* AT 738 PM...STORM SPOTTERS REPORTED AND DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM 1 MILE SOUTH OF JAY...MOVING SOUTHEAST AT 30
  MPH. DIME TO NICKEL SIZE HAIL WAS REPORTED AT 733 PM 5 MILES WEST
OF JAY.

* SOME LOCATIONS AFFECTED INCLUDE...
  JAY
  COLCORD

  HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 0 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 7, 4:00 PM CDT, 3 hours 40 minutes earlier.

Area forecast discussion, May 7, 4:00 PM CDT, 3 hours 40 minutes before
FPUS3 KTUL 072057
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
400 PM CDT THU MAY 7 1998

THE ISOLATED SHOWERS AND THUNDERSTORMS WHICH POPPED UP THIS
AFTERNOON OVER FAR NORTHEAST OKLAHOMA SHOULD DISSIPATE WITH THE
SUNSET LEAVING THE NEXT CHANCE FOR RAIN FOR FRIDAY NIGHT.  ALL
THE MODELS EJECT SIGNICANT SHORTWAVE ENERGY NORTHEAST OVER THE
AREA FRIDAY NIGHT AND SATURDAY AND SHIFT IT EAST SATURDAY NIGHT.
THE SPEED OF THE MODELS IS SOMEWHAT DIFFERENT WITH THE AVN AND
NGM THE FASTEST AND THE ETA THE SLOWEST.  HAVE USED A BLEND OF
BOTH OF THEM BRINGING IN PRECIP SOONER THAN THE ETA AND HOLDING
ON TO IT LONGER THAN THE NGM AND AVN WOULD SUGGEST. AFTER SATURDAY
NIGHT THE WEATHER SHOULD BE NICE.

TEMPERATURE WISE...TOMORROW SHOULD BE LIKE TODAY WITH SATURDAY
BEING COOLER WITH THE CLOUDS AND RAIN.  SUNDAY WILL BE A LITTLE
WARMER THAN SATURDAY DESPITE COOLER 8H TEMPS DUE TO SUNSHINE.
HAVE FOLLOWED THE ECMWF FOR THE EXTENDED WHICH SHOWS UPPER RIDGING
AND WARMING 8H TEMPS.

THE
FCSTID = 17
TUL   58  82  60  72 /  10  10  60  70
FSM   57  85  60  73 /  10  10  60  70
MLC   58  85  62  75 /  10  10  60  60
BVO   55  80  57  72 /  10  10  60  60
FYV   53  78  55  67 /  20  10  60  70
IDB   57  87  63  76 /  10  10  60  60
BYV   52  77  54  66 /  20  10  60  70
MIO   55  80  57  70 /  20  10  60  70
MKO   58  82  60  72 /  10  10  60  70
F10   58  83  60  73 /  10  10  60  70
HHW   58  87  64  76 /  10  10  60  60

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

ABBAS

In the hours before

Special weather statement, May 7, 2:40 PM CDT, 5 hours before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-081200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE TULSA OK
240 PM CDT THU MAY 7 1998

ISOLATED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND INTO THE EARLY
EVENING ACROSS FAR NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
HOWEVER...THEY ARE NOT EXPECTED TO BE SEVERE.

ISOLATED THUNDERSTORMS HAVE DEVELOPED ALONG A WEAK WIND SHIFT LINE
ACROSS FAR NORTHEAST OKLAHOMA THIS AFTERNOON.  AN ADDITIONAL
THUNDERSTORM OR TWO WILL BE POSSIBLE OVER PORTIONS OF FAR NORTHEAST
OKLAHOMA AND NORTHWEST ARKANSAS...BUT RELATIVELY WEAK INSTABILITY SHOULD
KEEP THUNDERSTORMS BELOW SEVERE LIMITS.

ANY THUNDERSTORMS THAT DO FORM SHOULD DISSIPATE SHORTLY AFTER SUNSET.
Local storm report, May 7, 7:37 PM CDT, 3 minutes before
PRELIMARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
737 PM CDT THU MAY 7 1998

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

0733 PM    5 W JAY                   OK   .88 INCH HAIL
05/07/98   DELAWARE
Local storm report, May 7, 7:37 PM CDT, 3 minutes before
PRELIMARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
737 PM CDT THU MAY 7 1998

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

0733 PM    5 W JAY                   OK   .88 INCH HAIL
05/07/98   DELAWARE

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.