Alert archive / Arkansas / Tornado Warnings in 2009

Tornado Warning 21, NWS Tulsa, OK

May 1, 2009Madison County, Arkansas

NWS Tulsa, OK issued this tornado warning at May 1, 2009, 7:28 PM CDT for Madison County, Arkansas. It was in force for 22 min. 1 report 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: May 1, 2009, 7:28 PM CDT (00:28 UTC)
Expired: May 1, 2009, 7:50 PM CDT
In force: 22 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Madison County, AR

The radar

The Western Arkansas radar (KSRX), 109 km from the middle of the area, began a volume at 00:28 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
May 1, 7:30 PM CDT	HAIL 1	Kingston, AR

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
May 1, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.5 hours before the alert went out and 107 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: 8 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 445 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 321 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 
WFUS54 KTSA 020028
TORTSA
ARC087-020100-
/O.NEW.KTSA.TO.W.0021.090502T0028Z-090502T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
728 PM CDT FRI MAY 1 2009

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN MADISON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 800 PM CDT

* AT 724 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES         
  SOUTHWEST OF KINGSTON...MOVING EAST AT 20 MPH. THIS STORM HAS A    
  HISTORY OF PRODUCING LARGE HAIL...AND HAIL TO THE SIZE OF GOLF     
  BALLS WILL BE POSSIBLE.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...WEATHERS AND
  RED STAR...

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 9344 3595 9348 3592 9348 3591 9349
      3589 9349 3585 9351 3584 9353 3592 9365
      3612 9355 3612 9346 3609 9346 3608 9343
TIME...MOT...LOC 0028Z 278DEG 17KT 3599 9353

$$

1 follow-up statement

000 
WWUS54 KTSA 020050
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
750 PM CDT FRI MAY 1 2009

ARC087-020059-
/O.CAN.KTSA.TO.W.0021.000000T0000Z-090502T0100Z/
MADISON AR-
750 PM CDT FRI MAY 1 2009

...THE TORNADO WARNING FOR EASTERN MADISON COUNTY IS CANCELLED...

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA...THEREFORE THE 
TORNADO WARNING HAS BEEN CANCELLED. ADDITIONAL SEVERE THUNDERSTORMS 
ARE AFFECTING CENTRAL AND EASTERN MADISON COUNTY AND LARGE HAIL AND 
STRONG WINDS WILL REMAIN POSSIBLE. 

LAT...LON 3597 9344 3595 9348 3592 9348 3591 9349
      3589 9349 3585 9351 3584 9353 3592 9365
      3612 9355 3612 9346 3609 9346 3608 9343
TIME...MOT...LOC 0049Z 278DEG 17KT 3598 9341

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 7:18 PM CDT	Special Weather Statement	TSA	Benton	42 min
May 1, 7:34 PM CDT	Severe Thunderstorm Warning	TSA	Madison	43 min
May 1, 7:42 PM CDT	Flash Flood Warning	TSA	Madison	4 hr
May 1, 9:05 PM CDT	River Flood Watch	TSA	Crawford, Sebastian	21 hr
May 1, 9:38 PM CDT	Areal Flood Advisory	TSA	Crawford, Franklin, Madison, Washington	112 min
May 1, 9:50 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Washington	55 min
May 1, 11:51 PM CDT	Areal Flood Warning	TSA	Madison, Washington	8 hr
May 2, 2:59 PM CDT	River Flood Warning	TSA	Crawford, Sebastian	42 hr
May 2, 3:23 PM CDT	Areal Flood Advisory	TSA	Franklin, Sebastian	112 min

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.