Alert archive / Arkansas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 285, NWS Tulsa, OK

July 20, 2000Crawford County, Arkansas; Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 20, 2000, 9:27 AM CDT for Crawford County, Arkansas; Sequoyah County, Oklahoma. It was in force for 48 min. 1 report 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, 9:27 AM CDT (14:27 UTC)
Expired: Jul 20, 2000, 10:15 AM CDT
In force: 48 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Crawford County, AR, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 36 km from the middle of the area, began a volume at 14:28 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.

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, 2.5 hours before the alert went out and 155 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 201429
SVRTUL
ARC033-OKC135-201515-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
927 AM CDT THU JUL 20 2000

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  EASTERN SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
  CRAWFORD COUNTY IN NORTHWEST ARKANSAS
  
* UNTIL 1015 AM CDT

* AT 927 AM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO
65 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 3 MILES SOUTH   OF 
WINSLOW TO 4 MILES SOUTHEAST OF SALLISAW...MOVING SOUTHEAST AT   45 
MPH.

* SOME LOCATIONS AFFECTED INCLUDE...LEE CREEK...RUDY...FIGURE FIVE...
DYER...CHESTER...NATURAL DAM...CEDARVILLE...ALMA...VAN BUREN...  
MOUNTAINBURG...WINSLOW...MULBERRY...MOFFETT...SHORT...  
ROLAND...MULDROW AND SALLISAW.


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 REPORT SEVERE WEATHER TO THE NATIONAL WEATHER
SERVICE.

LAT...LON 3582 9434 3540 9489 3538 9420 3545 94I08
          3578 9386

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, 9:44 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Sebastian, Washington	46 min
Jul 20, 10:29 AM CDT	Severe Thunderstorm Warning	TSA	Franklin	31 min
Jul 20, 6:53 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee	52 min
Jul 20, 6:53 AM CDT	Severe Thunderstorm Warning	TSA	Washington	52 min
Jul 20, 7:23 AM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers	52 min
Jul 20, 7:23 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	52 min
Jul 20, 7:34 AM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	41 min
Jul 20, 8:13 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Delaware, Mayes	47 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2000 Severe Thunderstorm Warnings in Oklahoma, 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.