Alert archive / Arkansas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 16, NWS Tulsa, OK

January 21, 1999Crawford County, Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Jan 21, 1999, 10:21 PM CST for Crawford County, Franklin County, Sebastian County, Arkansas. It was in force for 24 min. 2 reports 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: Jan 21, 1999, 10:21 PM CST (04:21 UTC)
Expired: Jan 21, 1999, 10:45 PM CST
In force: 24 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Crawford County, AR, Franklin County, AR, Sebastian County, AR

What was reported inside it

Time	Report	Where	Remark
Jan 21, 10:25 PM CST	Thunderstorm Wind	Barling, AR	A barn was blown away by thunderstorm winds. Power lines were also blown down.
Jan 21, 10:30 PM CST	Hail 0.88	Ft Smith, 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 00:00Z, 4.4 hours before the alert went out and 166 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: 852 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1195 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jan 21, 8:45 PM CST, 1 hour 36 minutes earlier.

Area forecast discussion, Jan 21, 8:45 PM CST, 1 hour 36 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
845 PM CST THU JAN 21 1999

HAVE ALREADY SENT AN UPDATED ZONE AND RDF PACKAGE TO ACCOUNT
FOR BATCH OF SEVERE STORMS MOVING ACROSS SOUTHEAST OKLAHOMA
AND WEST CENTRAL ARKANSAS.  CURRENT INDICATIONS ARE THAT
CLUSTER OF SEVERE STORMS WILL MOVE OUT OF COUNTY WARNING
AREA BY AROUND 0300Z...BUT AIRMASS REMAINS UNSTABLE ACROSS
THE REGION AND REDEVELOPMENT ALREADY OCCURRING ACROSS
SOUTHEAST OKLA. WILL KEEP LIKELY POPS GOING FOR MUCH OF THE
NIGHT IN SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS WHERE
BEST UPPER FORCING WILL PERSIST.

COLD FRONT MAKING SLOW SWD PROGRESS ACROSS NORTHEAST OKLAHOMA
THIS EVENING AND SHOULD CONTINUE A SLOW PUSH TO THE SOUTH
OVERNIGHT.  THE FRONT MAY AID DEVELOPMENT OF SHRA/TSRA LATER
TONIGHT...AND WILL KEEP THE MENTION OF CHANCE POPS FOR NORTHEAST
OKLAHOMA AND THE NORTHWEST CORNER OF ARK.

NO CHANGES TO LATER PERIODS OF FORECAST.

FCSTID = 9

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

In the hours before

Local storm report, Jan 21, 4:42 PM CST, 5 hours 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
442 PM CST THU JAN 21 1999

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

0423 PM    STANLEY                   OK   1 INCH HAIL
01/21/99   PUSHMATAHA                     REPORTED BY CLAYTON CD
                                          DIRECTOR

Local storm report, Jan 21, 5:41 PM CST, 4 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
541 PM CST THU JAN 21 1999

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

0529 PM    BENGAL                    OK   1 INCH HAIL
01/21/99   LATIMER                        REPORTED BY AMATEUR RADIO
                                          SPOTTER

Local storm report, Jan 21, 6:05 PM CST, 4 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
605 PM CST THU JAN 21 1999

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

0545 PM    LEFLORE                   OK   1 INCH HAIL
01/21/99   LE FLORE                       REPORTED BY PUBLIC

0554 PM    WISTER                    OK   1.75 INCH HAIL
01/21/99   LE FLORE                       REPORTED BY AMATEUR
                                          RADIO SPOTTER

0553 PM    8 SW CLAYTON              OK   0.75 INCH HAIL
01/21/99   PUSHMATAHA                       REPORTED BY AMATEUR
                                          RADIO SPOTTER

Special weather statement, Jan 21, 10:15 PM CST, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 6:11 PM CST	Severe Thunderstorm Warning	TSA	Latimer	34 min
Jan 21, 6:11 PM CST	Tornado Warning	TSA	LeFlore	34 min
Jan 21, 6:41 PM CST	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	49 min
Jan 21, 6:49 PM CST	Severe Thunderstorm Warning	TSA	Haskell	41 min
Jan 21, 7:28 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	47 min
Jan 21, 8:52 PM CST	Severe Thunderstorm Warning	TSA	Choctaw	38 min
Jan 21, 9:07 PM CST	Severe Thunderstorm Warning	TSA	Pushmataha	38 min
Jan 21, 9:12 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	33 min
Jan 21, 9:45 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	45 min
Jan 21, 6:41 PM CST	Tornado Warning	TSA	Sebastian	34 min
Jan 21, 6:53 PM CST	Severe Thunderstorm Warning	TSA	Franklin	52 min
Jan 21, 7:12 PM CST	Tornado Warning	TSA	Franklin, Sebastian	48 min
Jan 21, 7:20 PM CST	Severe Thunderstorm Warning	TSA	Sebastian	40 min
Jan 21, 7:37 PM CST	Tornado Warning	TSA	Sebastian	38 min
Jan 21, 8:13 PM CST	Tornado Warning	TSA	Franklin, Sebastian	47 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1999 Every severe thunderstorm warning in 1999

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.