Alert archive / Arkansas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 319, NWS Tulsa, OK

August 20, 1997Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 20, 1997, 5:38 PM CDT for Washington County, Arkansas. It was in force for 52 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: Aug 20, 1997, 5:38 PM CDT (22:38 UTC)
Expired: Aug 20, 1997, 6:30 PM CDT
In force: 52 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Washington County, AR

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.6 hours before the alert went out and 109 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: 351 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 202238 RRA
SVRTUL
ARC143-202330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
538 PM CDT WED AUG 20 1997
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST ARKANSAS
 
   ...EASTERN WASHINGTON COUNTY
 
AT 536 PM...DOPPLER WEATHER RADAR INDICATED A BAND OF SEVERE
THUNDERSTORMS FROM NEAR FARMINGTON...TO NEAR WEST FORK...TO NEAR
WINSLOW. WINSLOW...BRENTWOOD...SULPHUR CITY...ELKINS...AND DURHAM ARE IN
THE PATH OF THIS STORM.
 
DAMAGING WINDS WITH GUSTS UP TO 70 MPH WILL OCCUR WITH THIS LINE OF
THUNDERSTORMS.  IF YOU ARE IN THE PATH OF THESE STORMS SEEK SHELTER
IMMEDIATELY IN THE LOWEST FLOOR OF YOUR BUILDING OR HOME.  STAY
AWAY FROM OUTSIDE WALLS AND WINDOWS.  IF YOU ARE IN A MOBILE HOME
YOU SHOULD MOVE TO A MORE SUBSTANTIAL STRUCTURE IF ONE IS NEARBY.

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 Aug 20, 4:05 PM CDT, 1 hour 33 minutes earlier.

Area forecast discussion, Aug 20, 4:05 PM CDT, 1 hour 33 minutes before

FPUS3 KTUL 202101
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
405 PM CDT WED AUG 20 1997

CLUSTER OF STG/SVR TSRA CONTS MOVG SE ACRS NE OKLA THIS
AFTN. XPCT THIS ACTIVITY TO GRADLY DIMINISH THIS EVE
AFTER LOSS OF HEATING...ALTHO CANT RULE OUT AN ISOLD
TSRA AFTER DARK ACRS MAINLY NE OKLA AS LEFTOVER BNDRIES
AND UPR SPEED MAX AID DVLPMENT.

XPCT CONTD THREAT OF TSRA THRU LATE WEEK AS NW FLOW
REGIME CONTINUES. WL PLACE HIEST POPS THURS THROUGH
FRIDAY ACRS WRN PART OF FA...WHERE AN ORGANIZED MCS
MAY AFFECT A LARGE PART OF CNTRL/ERN OKLA LATE
THURS NITE AND EARLY FRI.

SOME LO LVL DRYING WILL GRADLY WORK INTO THE FCST
AREA FROM THE NE ON FRI...WITH NE WINDS AND CLDS/SHRA
KEEPING TEMPS IN THE 80S MOST AREAS.

FCSTID = 9
TUL   69  91  68  87 /  20  20  40  40
FSM   70  94  69  89 /  20  10  20  40
MLC   70  94  69  90 /  20  20  30  40
BVO   68  91  66  87 /  20  20  40  40
FYV   66  89  65  86 /  20  10  20  30
IDB   70  95  70  93 /  20  10  20  30
BYV   65  88  64  85 /  20  10  20  30
MIO   66  89  65  86 /  20  20  30  40
MKO   69  91  68  87 /  20  20  40  40
F10   69  92  68  88 /  20  20  40  40

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

In the hours before

Local storm report, Aug 20, 4:45 PM CDT, 53 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
445 PM CDT WED AUG 20 1997

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

0338 PM    4 S COLLINSVILLE          OK   60 MPH TSTM GUST
08/20/97   TULSA

0400 PM    1 S CATOOSA               OK   70 MPH TSTM GUST
08/20/97   TULSA                          TOP BLOWN OUT OF LARGE TREE
                                          ONTO A HOUSE AT 193RD E AVE
                                          AND ADMIRAL

0300 PM    DEWEY                     OK   60 MPH TSTM GUST
08/20/97   WASHINGTON                     POWER LINES DOWNED

Local storm report, Aug 20, 4:50 PM CDT, 48 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
445 PM CDT WED AUG 20 1997

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

0338 PM    4 S COLLINSVILLE          OK   60 MPH TSTM GUST
08/20/97   TULSA

0400 PM    1 S CATOOSA               OK   70 MPH TSTM GUST
08/20/97   TULSA                          TOP BLOWN OUT OF LARGE TREE
                                          ONTO A HOUSE AT 193RD E AVE
                                          AND ADMIRAL

0300 PM    DEWEY                     OK   60 MPH TSTM GUST
08/20/97   WASHINGTON                     POWER LINES DOWNED

Local storm report, Aug 20, 4:52 PM CDT, 46 minutes before

STORM REPORT CORRECTED
NATIONAL WEATHER SERVICE TULSA, OK
452 PM CDT WED AUG 20 1997

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

0338 PM    4 S COLLINSVILLE          OK   60 MPH TSTM GUST
08/20/97   TULSA

0400 PM    1 S CATOOSA               OK   70 MPH TSTM GUST
08/20/97   ROGERS                         TOP BLOWN OUT OF LARGE TREE
                                          ONTO A HOUSE AT 193RD E AVE
                                          AND ADMIRAL

0300 PM    DEWEY                     OK   60 MPH TSTM GUST
08/20/97   WASHINGTON                     POWER LINES DOWNED

Local storm report, Aug 20, 4:53 PM CDT, 45 minutes before

STORM REPORT CORRECTED
NATIONAL WEATHER SERVICE TULSA, OK
452 PM CDT WED AUG 20 1997

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

0338 PM    4 S COLLINSVILLE          OK   60 MPH TSTM GUST
08/20/97   TULSA

0400 PM    1 S CATOOSA               OK   70 MPH TSTM GUST
08/20/97   ROGERS                         TOP BLOWN OUT OF LARGE TREE
                                          ONTO A HOUSE AT 193RD E AVE
                                          AND ADMIRAL

0300 PM    DEWEY                     OK   60 MPH TSTM GUST
08/20/97   WASHINGTON                     POWER LINES DOWNED

Local storm report, Aug 20, 5:00 PM CDT, 38 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
500 PM CDT WED AUG 20 1997

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

0452 PM    SCRAPER                   OK   60 MPH TSTM GUST
08/20/97   CHEROKEE

Local storm report, Aug 20, 5:01 PM CDT, 37 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
500 PM CDT WED AUG 20 1997

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

0452 PM    SCRAPER                   OK   60 MPH TSTM GUST
08/20/97   CHEROKEE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 5:34 PM CDT	Severe Thunderstorm Warning	TSA	Crawford	41 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1997 Every severe thunderstorm warning in 1997

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.