Alert archive / Arkansas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 286, NWS Tulsa, OK

July 20, 20005 counties in Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 20, 2000, 9:44 AM CDT for 5 counties in Arkansas. It was in force for 46 min. 9 reports came from 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, with what was reported inside it.

The facts

Issued: Jul 20, 2000, 9:44 AM CDT (14:44 UTC)
Expired: Jul 20, 2000, 10:30 AM CDT
In force: 46 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 61 km from the middle of the area, began a volume at 14:46 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

Time	Report	Where	Remark
Jul 20, 9:45 AM CDT	Thunderstorm Wind	Alma, AR	Thunderstorm winds blew several large tree limbs down.
Jul 20, 9:45 AM CDT	Thunderstorm Wind	St Paul, AR	Thunderstorms winds blew tree down onto Highways 16 and 23.
Jul 20, 9:45 AM CDT	Thunderstorm Wind	Winslow, AR	Thunderstorm winds blew several trees down.
Jul 20, 9:50 AM CDT	Thunderstorm Wind	Turners Bend, AR	Thunderstorm winds blew down trees.
Jul 20, 9:53 AM CDT	Thunderstorm Wind 52 E	Ft Smith, AR
Jul 20, 10:00 AM CDT	Thunderstorm Wind	Ft Smith, AR	Thunderstorm winds blew down numerous trees.
Jul 20, 10:10 AM CDT	Thunderstorm Wind	Ozark, AR	Thunderstorm winds blew down trees.
Jul 20, 10:15 AM CDT	Thunderstorm Wind	Branch, AR	Thunderstorm winds blew tree down onto Highway 22.
Jul 20, 10:18 AM CDT	Thunderstorm Wind 52 E	Greenwood, 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, 2.7 hours before the alert went out and 130 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: 1500 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 550 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 201447
SVRTUL
ARC033-047-087-131-143-201530-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
944 AM CDT THU JUL 20 2000

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  CRAWFORD COUNTY IN NORTHWEST ARKANSAS
  MADISON COUNTY IN NORTHWEST ARKANSAS
  SOUTHEASTERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS
  FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS
  SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS

* UNTIL 1030 AM CDT

* AT 944 AM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO
65 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 3 MILES NORTHEAST OF 
WEATHERS TO 2 MILES SOUTH OF VAN BUREN...MOVING SOUTH AT 20 MPH.

* SOME LOCATIONS AFFECTED ST PAUL...MOUNTAINBURG...VAN BUREN...FORT 
SMITH...OZARK AND WINSLOW.

STORM SPOTTERS REPORTED TREES DOWN AND POWER OUTAGES IN NORTHERN 
MADISON COUNTY AROUND 915 AM. 

THESE STORMS WILL PRODUCE EXTENSIVE PROPERTY DAMAGE - TAKE COVER NOW!
IF NO UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON
THE LOWEST FLOOR. ABANDON MOBILE HOMES AND VEHICLES FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

CALL 1-800-722-2778 TO REPORTJ SEVERE WEATHER TO THE NATIONAL WEATHER
SERVICE.

LAT...LON 3620 9358 3594 9413 3563 9445 3545 9449
          3502 9426 3570 9323

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 Jul 20, 4:10 AM CDT, 5 hours 34 minutes earlier.

Area forecast discussion, Jul 20, 4:10 AM CDT, 5 hours 34 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
410 AM CDT THU JUL 20 2000

COLD POOL HAS FORMED WITH THE CONVECTIVE COMPLEX IN KANSAS AND
STORMS ARE NOW MAKING A BEELINE RIGHT DOWN THE INSTABILITY AXIS
TOWARDS OUR FORECAST AREA. AS HAS BEEN THE CASE LATELY...MODELS ARE
LAGGING BEHIND OBSERVED RADAR DATA BY SEVERAL HOURS SO HAVE
BASICALLY FOLLOWED THE 06Z ETA MODEL AS THE BASIS FOR THIS FORECAST
BUT SPED IT UP A FEW HOURS.

WITH UPPER RIDGE RETROGRADING TODAY AND NORTHWEST FLOW INCREASING
ACROSS THE AREA...EXPECT THE COMPLEX TO MAKE ITS WAY ACROSS MUCH OF
THE FORECAST AREA TODAY SO WILL GO LIKELY POPS IN MOST AREAS EXCEPT
FOR CHANCE POPS DOWN NEAR THE RED RIVER. IT WILL BE ANOTHER HOT DAY
IN SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS AS THEY WILL HAVE
PLENTY OF TIME TO HEAT UP BEFORE THE STORMS ARRIVE BUT MUCH COOLER
WEATHER IS ON TAP FURTHER NORTH. TEMPERATURE RECOVERY THIS
AFTERNOON WILL BE HAMPERED BY DEBRIS CLOUDINESS AND ALSO COOL NORTH
TO NORTHEAST LOW LEVEL FLOW BEHIND THE COLD FRONT WHICH WILL GET A
GOOD KICK SOUTH TODAY FROM THE STORMS.

FORECAST TRICKIER BEYOND TODAY AS TIMING AND LOCATION OF ADDITIONAL
CONVECTIVE COMPLEXES WILL BE TOUGH TO PIN DOWN. WITH THE AIRMASS
STABILIZED BY TODAYS CONVECTION...MAIN SHOW TONIGHT MAY BE TO OUR
WEST BUT CONFIDENCE ON THIS IS NOT HIGH. WILL BROADBRUSH 50% POPS
ACROSS MOST OF THE AREA TONIGHT THROUGH FRIDAY NIGHT AS MOIST
AIRMASS WILL REMAIN IN PLACE AND BE CONDUCIVE TO SEVERAL ROUNDS OF
CONVECTION WITH TIMING AND LOCATION THE BIG UNKNOWNS AT THIS POINT.

PATTERN CHANGES LITTLE THROUGH THE WEEKEND SO WILL KEEP POPS GOING
THROUGH THE EXTENDED BUT LOWER THEM TO SLIGHT CHANCE MONDAY. WILL
SEE A WELCOME BREAK FROM THE HEAT FOR SEVERAL DAYS BUT THINGS START
WARMING BACK UP DURING THE FIRST PART OF NEXT WEEK.

GENERALLY UNDERCUT GUIDANCE MAXIMUM TEMPERATURES DUE TO CLOUDS AND
CONVECTION THE NEXT COUPLE DAYS BUT STAYED CLOSER TO GUIDANCE ON
MINIMUMS. WENT WAY ABOVE GUIDANCE POPS TODAY BASED ON CURRENT RADAR
AND MAY MAKE FURTHER ADJUSTMENTS TO POPS TODAY AT THE LAST MINUTE.

FCSTID = 5
TUL   87  70  85  68 /  70  50  50  50
FSM   98  71  89  70 /  60  30  50  40
MLC   98  72  87  70 /  50  30  50  40
BVO   84  68  83  66 /  70  50  50  50
FYV   90  69  84  66 /  70  50  50  50
BYV   90  69  84  66 /  70  50  50  50
MIO   86  68  83  66 o/  70  50  50  50
MKO   92  70  86  69 /  60  40  50  50
F10   92  70  86  69 /  60  40  50  50
HHW  100  73  90  71 /  30  30  40  30

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

PLATE

In the hours before

Local storm report, Jul 20, 7:58 AM CDT, 1 hour 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
758 AM CDT THU JUL 20 2000

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

075R0 AM    1 W PRYOR                 OK    WIND DAMAGE
07/20/00   MAYES                           LARGE TREE LIMBS DOWN 1
                                           WEST OF PRYOR

Local storm report, Jul 20, 8:09 AM CDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
809 AM CDT THU JUL 20 2000

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

0735 AM    TULSA                     OK    WIND DAMAGE
07/20/00   TULSA                           NUMEROUS POWER LINES
                                           REPORTED DOWN...VARIOUS
                                           PART OF NORTH TULSA

Local storm report, Jul 20, 8:26 AM CDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
826 AM CDT THU JUL 20 2000

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

0820 AM    LOCUST GROVE              OK    WIND DAMAGE
07/20/00   MAYES                           TREES DOWN OVER SH82
                                           NEAR LOCUST GROVE

Local storm report, Jul 20, 8:33 AM CDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
833 AM CDT THU JUL 20 2000

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

0810 AM    ZENA                      OK    WIND DAMAGE
07/20/00   DELAWARE                        POWER LINES DOWN NEAR
                                           ZENA

Local storm report, Jul 20, 8:38 AM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
838 AM CDT THU JUL 20 2000

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

0820 AM    8 W JAY                   OK    WIND DAMAGE
07/20/00   DELAWARE                        LARGE TREES DOWN WEST
                                           OF JAY ON SH28

Local storm report, Jul 20, 8:45 AM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
845 AM CDT THU JUL 20 2000

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

0825 AM    5 S PRYOR                 OK    WIND DAMAGE
07/20/00   MAYES                           MOBILE HOME DAMAGED

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 8:13 AM CDT	Severe Thunderstorm Warning	TSA	Benton	47 min
Jul 20, 8:51 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison, Washington	54 min
Jul 20, 9:27 AM CDT	Severe Thunderstorm Warning	TSA	Crawford	48 min
Jul 20, 10:29 AM CDT	Severe Thunderstorm Warning	TSA	Franklin	31 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2000 Every severe thunderstorm warning in 2000

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.