Alert archive / Arkansas / Tornado Warnings in 2004

Tornado Warning 18, NWS Tulsa, OK

April 21, 2004Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this tornado warning at Apr 21, 2004, 5:04 PM CDT for Franklin County, Sebastian County, Arkansas. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 21, 2004, 5:04 PM CDT (22:04 UTC)
Expired: Apr 21, 2004, 6:00 PM CDT
In force: 56 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

Counties Franklin County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 36 km from the middle of the area, began a volume at 22:04 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 21, 2:40 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.1 hours before the alert went out and 179 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: 297 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 855 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: -7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

718 
WFUS54 KTSA 212204
TORTUL
ARC047-131-212300-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
504 PM CDT WED APR 21 2004

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR
  SOUTHERN FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS
  NORTHEASTERN SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS

* UNTIL 600 PM CDT

* AT 504 PM CDT...DOPPLER RADAR INDICATED A DEVELOPING TORNADO 2
  MILES EAST OF BLOOMER. THIS DANGEROUS STORM IS MOVING EAST AT 20
  MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...CHARLESTON...
  BRANCH...LAVACA...FT CHAFFEE AND BLOOMER.

IF YOU ARE IN OR NEAR THE PATH OF THIS STORM...TAKE COVER NOW IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS

LAT...LON 3540 9417 3522 9421 3511 9365 3536 9360

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 11:08 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	52 min
Apr 21, 2:59 PM CDT	Severe Thunderstorm Warning	TSA	Franklin	76 min
Apr 21, 3:31 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	59 min
Apr 21, 4:28 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	62 min
Apr 21, 6:04 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	56 min

Nearby

Tornado Warnings in Arkansas, 2004 Every tornado warning in 2004 Tornadoes in 2004

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; radar from the NEXRAD Level II archive.