Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 59, NWS Tulsa, OK

April 3, 1998Carroll County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 3, 1998, 10:31 AM CST for Carroll County, Arkansas. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 3, 1998, 10:31 AM CST (16:31 UTC)
Expired
Apr 3, 1998, 11:15 AM CST
In force
44 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Carroll County, AR

The radar

The Springfield radar (KSGF), 100 km from the middle of the area, began a volume at 16:31 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.

What was reported inside it

TimeReportWhereRemark
Apr 3, 11:00 AM CSTHail 0.75Osage, AR

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 4.5 hours before the alert went out and 66 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 1998-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 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 12:00Z on 1998-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.19395878Sfc1 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
31 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
868 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
80 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 031631 RRA
SVRTUL
ARC015-031715-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1031 AM CST FRI APR 3 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWESTERN ARKANSAS

   ...SOUTHEASTERN CARROLL COUNTY

AT 1029 AM...NWS RADAR INDICATED A SEVERE THUNDERSTORM JUST
SOUTHEAST OF OSAGE MOVING EAST AT 20 MPH.

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

WHEN THUNDERSTORMS ARE OCCURRING... PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR
ELECTRICAL APP
LIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS
PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

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 Apr 3, 4:25 AM CST, 6 hours 6 minutes earlier.

Area forecast discussion, Apr 3, 4:25 AM CST, 6 hours 6 minutes before
FPUS3 KTUL 031040
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
425 AM CST FRI APR 3 1998

THE UPPER LOW OVER NW OK WILL MOVE EWD AND TAKE THE CLDS/PCPN WITH
IT.  SFC LOW AND H8 LOW WILL TRACK TO ERN AR ARND MIDDAY...CAUSING
WINDS TO BECOME STG N AND NW OVER THE FCST AREA.  THE COLD ADVECTION
WILL BEGIN OVER WRN AND NWRN ZONES THIS MORNING...AND GRDLY SPREAD TO
THE EAST.  THIS IS A CONCERN FOR THE HIGH TEMPS FOR TDA.  MOSTLY
CLEAR SKIES THIS MORNING SHD ALLOW SOME WARMING...BUT CLDS AND COOLER
AIR WILL ADVANCE AND SHD END ANY WARMUP.  HIGHS ARE PRETTY IFFY...AND
WENT COOLER THAN GUIDANCE.  WITH UPPER LOW MVG OVER THE AREA...AND
COLD AIR ALF...XPC A CHANCE OF SHOWERS OVER NRN HALF OF FCST AREA.
ANY PCPN WILL ALSO AFFECT TEMPS LATER TODAY.

THE ENTIRE SYSTEM MOVES EAST OF THE FCST AREA TNGT...WITH STG NEG
VORT ADVECTION.  CONSIDERED A SUBSIDENCE ADVISORY...BUT DECIDED NOT.
SKIES SHD CLEAR...AND SFC RIDGE WILL MOVE OVER THE AREA. MAY HAVE
SOME LOW CLDS OR LIGHT FOG ON SAT MRNG...BUT SHD BURN OFF QUICKLY.

FCSTID = 2
TUL   58  39  61  43 /  20   0   0   0
FSM   63  41  61  39 /  20   0   0   0
MLC   64  42  63  42 /  10   0   0   0
BVO   56  37  61  41 /  30   0   0   0
FYV   62  39  59  39 /  30  20   0   0
IDB   68  45  66  45 /  10   0   0   0
BYV   62  38  59  39 /  30  20   0   0
MIO   58  36  59  40 /  30  10   0   0
MKO   60  40  61  41 /  20   0   0   0
F10   62  42  64  42 /  10   0   0   0
HHW   69  44  66  43 /  20   0   0   0

.TUL...
OK...CAUTION ON AREA LAKES ZONES 54>76.
AR...CAUTION ON AREA LAKES ZONES 1/2/10/11/19/20/29.

In the hours before

Special weather statement, Apr 3, 6:00 AM CST, 4 hours 31 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-041200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
600 AM CST FRI APR 3 1998

NO HAZARDOUS WEATHER IS EXPECTED ACROSS NORTHWEST ARKANSAS OR
EASTERN OKLAHOMA THROUGH TONIGHT.

THE UPPER LEVEL LOW PRESSURE SYSTEM THAT BROUGHT SCATTERED
THUNDERSTORMS TO PARTS OF NORTHEAST OKLAHOMA AND NORTHWEST
ARKANSAS LAST NIGHT WAS OVER NORTHERN OKLAHOMA THIS MORNING.
THE THUNDERSTORMS ASSOCIATED WITH THIS SYSTEM HAD MOVED WELL EAST
OF THE AREA.

THE UPPER LEVEL WEATHER SYSTEM WILL MOVE ACROSS NORTHEAST OKLAHOMA
TODAY AND INTO SOUTHERN MISSOURI THIS AFTERNOON. A SURFACE LOW
PRESSURE SYSTEM NEAR PONCA CITY EARLY THIS MORNING WILL MOVE INTO
NORTHEAST ARKANSAS THIS AFTERNOON.

ALTHOUGH THE ATMOSPHERE VERY NEAR THE SURFACE WAS STILL MOIST...
WESTERLY WINDS JUST ABOVE THE SURFACE HAVE DELIVERED VERY DRY AIR
INTO THE AREA. THE DRY AIR NEAR THE SURFACE WILL KEEP THE ATMOSPHERE
RELATIVELY STABLE DESPITE COLD AIR ALOFT ASSOCIATED WITH THE UPPER LEVEL
LOW PRESSURE SYSTEM. A FEW SHOWERS ARE POSSIBLE ACROSS NORTHEAST
OKLAHOMA AND NORTHWEST ARKANSAS TODAY...BUT NO THUNDERSTORMS ARE
EXPECTED.

AS THE SURFACE LOW MOVES EAST OF THE AREA TODAY...GUSTY NORTHWEST
WINDS WILL DEVELOP. WIND GUSTS OVER 30 MPH ARE POSSIBLE THIS
AFTERNOON BEFORE THE WINDS DIMINISH TONIGHT.

Nearby

Severe Thunderstorm Warnings in Arkansas, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.