Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 472, NWS Tulsa, OK

November 7, 1998Cherokee County, Delaware County, Mayes County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Nov 7, 1998, 11:58 AM CST for Cherokee County, Delaware County, Mayes County, Oklahoma. It was in force for 32 min. No storm report in the archive falls 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.

The facts

Issued
Nov 7, 1998, 11:58 AM CST (17:58 UTC)
Expired
Nov 7, 1998, 12:30 PM CST
In force
32 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Cherokee County, OK, Delaware County, OK, Mayes County, OK

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 6.0 hours before the alert went out and 133 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 12:00Z on 1998-11-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 1998-11-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1431 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 071758 RRA
SVRTUL
OKC021-041-097-071830-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1158 AM CST SAT NOV 7 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
     MAYES COUNTY IN OKLAHOMA
     CHEROKEE COUNTY IN OKLAHOMA
     DELAWARE COUNTY IN OKLAHOMA

* UNTIL 1230 PM CST

* AT 1158 AM CST RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES
  SOUTHWEST OF PEGGS...MOVING NORTHEAST AT 30 MILES PER HOUR.

* SOME LOCATIONS AFFECTED INCLUDE...  SPAVINAW...ROSE...LOCUST
  GROVE...SCRAPER...PEGGS...KANSAS...TWIN OAKS...LEACH AND OAKS

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

LAT...LON 3621 9523 3598 9516 3617 9466 3637 9480
          3638 9505

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 Nov 7, 9:25 AM CST, 2 hours 33 minutes earlier.

Area forecast discussion, Nov 7, 9:25 AM CST, 2 hours 33 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
925 AM CST SAT NOV 7 1998

WARM AIR ADVECTION/ISENTROPIC LIFT GENERATED PRECIPITATION
EXITING NORTHEAST PART OF THE AREA WITH CONVECTION...PRODUCED
BY STRONG SHORT WAVE MOVING ACROSS SOUTHERN KANSAS...
ENTERING NORTHWEST ZONES. AMA SOUNDING SHOWED SOME POSITIVE
AREA ABOVE 750 MB UP TO NEAR 500 MB. LIGHTNING GRAPHICS
SHOWING A SURPRISING AMOUNT OF LIGHTNING IN BAND OF CONVECTION
MOVING EASTWARD INTO NORTHEAST OKLAHOMA EVIDENTLY TAPPING THE
MEAGER SOURCE OF INSTABLILTY ALOFT. OTHER SCATTERED
SHOWERS WILL CONTINUE TO MOVE NORTHEAST ACROSS SOUTHERN
ZONES. ELEVATED INSTABILITY SHOULD BE LIMITED TO NORTHERN
ZONES IN CLOSER VICINITY TO UPPER WAVE AND COLD AIR ALOFT.

UPDATED ZONES TO UP POPS TO CATEGORICAL IN NORTHERN PART OF
THE AREA AND LEFT LIKELY POPS IN THE SOUTH. MENTIONED THUNDER
OVER NORTHERN ZONES AS WELL.

BACK EDGE OF PRECIP AND DRY SLOT WRAPPING INTO UPPER SYSTEM
CURRENTLY MOVING INTO NORTHWEST OKLAHOMA. EXPECT THIS TO CONT
TO MOVE EAST AND SHOULD CUT MOST OF PRECIP OFF BY THIS EVENING.
DIDN'T MAKE ANY CHANGES TO LATER PERIODS IN UPDATE...WITH LOW
POPS LEFT MAINLY IN FAR EASTERN ZONES THIS EVENING. /13

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

In the hours before

Special weather statement, Nov 7, 6:00 AM CST, 5 hours 58 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-081200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
600 AM CST SAT NOV 7 1998

NO SEVERE THUNDERSTORMS OR OTHER HAZARDOUS WEATHER ARE EXPECTED ACROSS
EASTERN OKLAHOMA OR NORTHWEST ARKANSAS THROUGH TONIGHT.

PATCHY RAIN HAS DEVELOPED IN ADVANCE OF AN UPPER LEVEL DISTURBANCE THAT
WILL MOVE FROM THE SOUTHERN ROCKIES ACROSS THE PLAINS TODAY AND EARLY
TONIGHT.  THE THREAT OF RAIN WILL CONTINUE OVER EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS THROUGH THE DAY...HOWEVER THE ATMOSPHERE IS EXPECTED
TO REMAIN TO COOL AND TO STABLE FOR THE DEVELOPMENT OF THUNDERSTORMS.
THE RAIN WILL DIMINISH BY THIS EVENING OR EARLY TONIGHT OVER THE AREA
AS THIS SYSTEM PASSES BY.

THIS OUTLOOK IS INTENDED TO PROVIDE GUIDANCE TO EMERGENCY MANAGEMENT
AGENCIES AND STORM SPOTTER GROUPS CONCERNING TORNADOES...SEVERE
THUNDERSTORMS...HIGH WIND EVENTS...FLOODING AND WINTER WEATHER.
INFORMATION CONCERNING OTHER HAZARDS CAN BE FOUND IN OTHER PRODUCTS
ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN TULSA.
Special weather statement, Nov 7, 6:00 AM CST, 5 hours 58 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-081200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
600 AM CST SAT NOV 7 1998

NO SEVERE THUNDERSTORMS OR OTHER HAZARDOUS WEATHER ARE EXPECTED ACROSS
EASTERN OKLAHOMA OR NORTHWEST ARKANSAS THROUGH TONIGHT.

PATCHY RAIN HAS DEVELOPED IN ADVANCE OF AN UPPER LEVEL DISTURBANCE THAT
WILL MOVE FROM THE SOUTHERN ROCKIES ACROSS THE PLAINS TODAY AND EARLY
TONIGHT.  THE THREAT OF RAIN WILL CONTINUE OVER EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS THROUGH THE DAY...HOWEVER THE ATMOSPHERE IS EXPECTED
TO REMAIN TO COOL AND TO STABLE FOR THE DEVELOPMENT OF THUNDERSTORMS.
THE RAIN WILL DIMINISH BY THIS EVENING OR EARLY TONIGHT OVER THE AREA
AS THIS SYSTEM PASSES BY.

THIS OUTLOOK IS INTENDED TO PROVIDE GUIDANCE TO EMERGENCY MANAGEMENT
AGENCIES AND STORM SPOTTER GROUPS CONCERNING TORNADOES...SEVERE
THUNDERSTORMS...HIGH WIND EVENTS...FLOODING AND WINTER WEATHER.
INFORMATION CONCERNING OTHER HAZARDS CAN BE FOUND IN OTHER PRODUCTS
ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN TULSA.

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.