Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 192, NWS Tulsa, OK

May 6, 1998Carroll County, Madison County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at May 6, 1998, 8:25 PM CDT for Carroll County, Madison County, Arkansas. It was in force for 50 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 6, 1998, 8:25 PM CDT (01:25 UTC)
Expired: May 6, 1998, 9:15 PM CDT
In force: 50 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Carroll County, AR, Madison County, AR

The radar

The Western Arkansas radar (KSRX), 119 km from the middle of the area, began a volume at 01:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 6, 4:00 PM CDT	Tornado Watch	SPC	6 hr
May 6, 8:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.4 hours before the alert went out and 82 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: 1358 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1166 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 070121 RRA
SVRTUL
ARC015-087-070215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
825 PM CDT WED MAY 6 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  CARROLL COUNTY - NORTHWESTERN ARKANSAS
  NORTHERN MADISON COUNTY - NORTHWESTERN ARKANSAS

* UNTIL 915 PM CDT

* AT 822 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM NEAR FORUM...MOVING NORTHEAST AT 20 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...
  GREEN FOREST
  FORUM
  METALTON

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

A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY
FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS.

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 DON'T 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 6, 3:10 PM CDT, 5 hours 15 minutes earlier.

Area forecast discussion, May 6, 3:10 PM CDT, 5 hours 15 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
310 PM CDT WED MAY 6 1998

MADE A QUICK UPDATE TO GOING AFTN ZONE PACKAGE TO REFLECT INCREASING
THREAT OF SVR TSTMS ALG KS BORDER.  UPR JET SWINGING IN LATE TODAY
IN ADDITION TO INCRSG SHORTWAVE ENERGY AND WKNG CAP.  RAISED POPS A
BIT NRN AREAS FOR TONIGHT AS MODELS IN BETTER AGREEMENT IN DVLPG
CONVECTION ACRS ERN KS/SWRN MO LATE TONIGHT AND CLIPPING OUR NRN
ZONE GROUPS.

IN AFTN PACKAGE...WL KEEP TREND OF SLIGHTLY HIR POPS IN THE NRN
ZONES (CLOSER TO BETTER UPR SUPPORT AND ENERGY)...HOWEVER CIRCLN
ARND SHORTWAVE SHUD SHOVE LLVL BNDRY A BIT FARTHER TO THE SE
TONIGHT.  CAP STRONGER DOWN SOUTH...HOWEVER BNDRY MAY FOCUS ACTIVITY
IN THE OVERNIGHT HRS...SO WL INTRODUCE SOME LOW POPS SWD.

SHORTWAVE SHUD PASS TO THE EAST EARLY IN THE MORNING...WITH SFC
BNDRY SETTLING INTO THE SERN ZONES.  BY MIDDAY...BNDRY SHUD MOVE INTO
SERN TX WITH LLVL MSTR SHALLOWING OUT ACRS FCST AREA.  HOWEVER...WITH
MIDLVL CAP WEAKENING A BIT (IN RESPONSE TO MIDLVL COOLING BY PASSING
SHORTWAVE TONIGHT) MAY MENTION ISOLD TSTMS TOMORROW AFTN AS WE
WARM IN AFTN SUNSHINE.

NEXT REAL SGFNT SHOT AT RAIN TO COME FRI INTO SAT.  CANNOT ARGUE
MUCH WITH AVN/MRF SOLNS OF EJECTING LOW FROM SWRN US ACRS FCST AREA
SAT MORNING.  LLVL REFLECTION WL FORM ALG STALLED SFC BNDRY ACRS
NRN TX FRI AFTN...PULLING MSTR ACRS SFC BNDRY INTO ERN OK/WRN AR.
SFC-850 MB FIELDS FROM MRF SUGGEST ISENTROPIC LIFT WL BE THE
STRONGEST FRI NIGHT...ENDING MIDDAY SAT.  BNDRY SHUD RETREAT SE OF
AREA LATE SAT AFTN WITH CLEARING SKIES EXPECTED SUNDAY.

UPDATED FCST ALREADY OUT.  REGULAR PACKAGE TO COME BETWEEN 4 AND 430 PM.

FCSTID = 14

SORRY FOLKS...DON`T HAVE TIME TO COMPUTE PRELIM NUMBERS ATTM.

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

In the hours before

Special weather statement, May 6, 3:00 PM CDT, 5 hours 25 minutes before

ARZ001-002-010-011-019-020-029-OKZ049-053>076-071100-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE TULSA OK
300 PM CDT WED MAY 6 1998

A FEW SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND TONIGHT
ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS MAINLY ALONG AND NORTH OF
A MCALESTER TO FORT SMITH LINE.

A TORNADO WATCH IS IN EFFECT UNTIL 9 PM THIS EVENING FOR PORTIONS OF
NORTHEAST OKLAHOMA...ALONG AND NORTH OF A BRISTOW TO TULSA TO WAGONER TO
JAY LINE.

A WEAK EAST TO WEST SURFACE BOUNDARY WAS LOCATED ACROSS FAR SOUTHERN
KANSAS THIS AFTERNOON.  AFTERNOON HEATING COMBINED WITH SURFACE
DEWPOINTS IN THE LOWER TO MID 60S HAVE RESULTED IN THUNDERSTORM
DEVELOPMENT ACROSS SOUTHERN KANSAS AND NORTHERN OKLAHOMA.  THESE STORMS
WILL CONTINUE TO STRENGTHEN AND MAY REACH PORTIONS OF PAWNEE AND OSAGE
COUNTIES AFTER 4 PM.  THE STORMS SHOULD EVENTUALLY SPREAD THROUGH
NORTHEAST OKLAHOMA EARLY THIS EVENING...POSSIBLY MOVING INTO NORTHWEST
ARKANSAS BY MID TO LATE EVENING.  GIVEN THE DEGREE OF
INSTABILITY...LARGE HAIL WILL BE THE PRIMARY SEVERE WEATHER THREAT.
HOWEVER...WIND PROFILES ALSO SUGGEST SUPERCELL THUNDERSTORMS ARE
POSSIBLE...SO AN ISOLATED TORNADO CANNOT BE RULED OUT.

ELSEWHERE...THE CAP OF WARM AIR ALOFT CONTINUES TO SUPPRESS THUNDERSTORM
DEVELOPMENT ACROSS SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.  THE
CAP HAS BEENING WEAKENING...HOWEVER...SO ISOLATED SEVERE THUNDERSTORMS
ARE STILL POSSIBLE THROUGH THE EARLY EVENING ACROSS SOUTHEAST OKLAHOMA
AND WEST CENTRAL ARKANSAS.

EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN NORTHEAST
OKLAHOMA AND NORTHWEST ARKANSAS SHOULD LISTEN FOR THE LATEST FORECASTS
AND BE PREPARED FOR POSSIBLE ACTIVATION LATE THIS AFTERNOON OR TONIGHT.

Local storm report, May 6, 3:59 PM CDT, 4 hours 26 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
359 PM CDT WED MAY 06 1998

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

0321 AM    HEAVENER                  OK   .88 INCH HAIL
05/06/98   LE FLORE

0400 AM    POTEAU                    OK   FLOODING
05/06/98   LE FLORE                       HIGH WATER TEMPORARILY
                                          COVERED DEWEY AVENUE
                                          TOWARDS HOSPITAL

Local storm report, May 6, 3:59 PM CDT, 4 hours 26 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
359 PM CDT WED MAY 06 1998

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

0321 AM    HEAVENER                  OK   .88 INCH HAIL
05/06/98   LE FLORE

0400 AM    POTEAU                    OK   FLOODING
05/06/98   LE FLORE                       HIGH WATER TEMPORARILY
                                          COVERED DEWEY AVENUE
                                          TOWARDS HOSPITAL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 7:01 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	59 min
May 6, 7:34 PM CDT	Tornado Warning	TSA	Crawford	56 min
May 6, 7:43 PM CDT	Tornado Warning	TSA	Franklin	62 min
May 6, 7:52 PM CDT	Severe Thunderstorm Warning	TSA	Madison	38 min
May 6, 8:01 PM CDT	Tornado Warning	TSA	Washington	44 min
May 6, 8:15 PM CDT	Tornado Warning	TSA	Crawford	45 min
May 6, 8:40 PM CDT	Severe Thunderstorm Warning	TSA	Sebastian	65 min
May 6, 8:45 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin	45 min
May 6, 8:52 PM CDT	Tornado Warning	TSA	Sebastian	38 min
May 6, 9:47 PM CDT	Severe Thunderstorm Warning	TSA	Crawford	43 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1998 Every 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.