Alert archive / Arkansas / Tornado Warnings in 2009

Tornado Warning 36, NWS Tulsa, OK

October 8, 2009Benton County, Washington County, Arkansas

NWS Tulsa, OK issued this tornado warning at Oct 8, 2009, 7:21 PM CDT for Benton County, Washington County, Arkansas. It was in force for 39 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Oct 8, 2009, 7:21 PM CDT (00:21 UTC)
Expired: Oct 8, 2009, 8:00 PM CDT
In force: 39 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Benton County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 88 km from the middle of the area, began a volume at 00:22 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
Oct 8, 7:35 PM CDT	TSTM WND DMG	2 N Prairie Grove, AR	SNAPPED TREE LIMB.
Oct 8, 7:52 PM CDT	TSTM WND DMG	Sonora, AR	TREES DOWNED BY WIND.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Oct 8, 4:41 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.4 hours before the alert went out and 102 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 499 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -367 m²/s²
0-3 km storm-relative helicity: -20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KTSA 090021
TORTSA
ARC007-143-090100-
/O.NEW.KTSA.TO.W.0036.091009T0021Z-091009T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
721 PM CDT THU OCT 8 2009

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN BENTON COUNTY IN NORTHWEST ARKANSAS
  NORTHERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 800 PM CDT

* AT 720 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  CINCINNATI...MOVING NORTHEAST AT 45 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...FARMINGTON...
  TONTITOWN...FAYETTEVILLE...CAVE SPRINGS...SPRINGDALE AND LOWELL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE 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 3592 9452 3612 9455 3633 9407 3613 9395
TIME...MOT...LOC 0021Z 243DEG 38KT 3604 9448

$$

1 follow-up statement

000 
WWUS54 KTSA 090038
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
738 PM CDT THU OCT 8 2009

ARC007-143-090100-
/O.CON.KTSA.TO.W.0036.000000T0000Z-091009T0100Z/
WASHINGTON AR-BENTON AR-
738 PM CDT THU OCT 8 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR CENTRAL
BENTON AND NORTHERN WASHINGTON COUNTIES...

AT 737 PM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM WAS
LOCATED NEAR WHEELER...MOVING EAST AT 45 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...TONTITOWN...ELM
SPRINGS...FAYETTEVILLE...OAK GROVE...JOHNSON...SHADY GROVE...
SPRINGDALE...LOWELL...SONORA AND MONTE NE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE 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 3597 9438 3624 9428 3633 9407 3613 9395
TIME...MOT...LOC 0039Z 255DEG 38KT 3609 9423

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 8, 7:52 PM CDT	Tornado Warning	TSA	Benton, Carroll, Madison, Washington	38 min
Oct 8, 8:33 PM CDT	Tornado Warning	TSA	Carroll, Madison	27 min
Oct 8, 8:47 PM CDT	Flash Flood Warning	TSA	Carroll, Madison	14 hr
Oct 8, 9:08 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	13 hr
Oct 8, 10:20 PM CDT	Special Weather Statement	TSA	Crawford, Franklin	40 min
Oct 9, 12:31 AM CDT	Flash Flood Warning	TSA	Benton, Washington	10 hr
Oct 9, 9:10 AM CDT	River Flood Warning	TSA	Crawford, Sebastian	29 hr
Oct 9, 10:20 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	6 hr
Oct 9, 3:56 PM CDT	Areal Flood Warning	TSA	Benton, Carroll, Crawford, Madison, Washington	27 hr

Nearby

Tornado Warnings in Arkansas, 2009 Every tornado warning in 2009 Tornadoes in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.