Alert archive / Arkansas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 291, NWS Tulsa, OK

July 11, 2003Benton County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 11, 2003, 11:24 PM CDT for Benton County, Arkansas. It was in force for 81 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: Jul 11, 2003, 11:24 PM CDT (04:24 UTC)
Expired: Jul 12, 2003, 12:45 AM CDT
In force: 81 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

County Benton County, AR

The radar

The Tulsa radar (KINX), 112 km from the middle of the area, began a volume at 04:26 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 11, 9:40 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.4 hours before the alert went out and 80 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: 1159 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1763 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 309 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

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

893 
WUUS54 KTSA 120424
SVRTUL
ARC007-120545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1124 PM CDT FRI JUL 11 2003

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  BENTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 1245 AM CDT

* AT 1124 PM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS     
  UP TO 70 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 16 MILES     
  NORTHWEST OF GRAVETTE TO 12 MILES NORTH OF GRAVETTE TO 14 MILES    
  NORTHWEST OF PEA RIDGE TO GATEWAY...MOVING SOUTHEAST AT 40 MPH.

* SOME LOCATIONS AFFECTED INCLUDE... BENTONVILLE...ROGERS...LOWELL...
  GENTRY...GRAVETTE...PEA RIDGE...GATEWAY...SPRINGTOWN...HIGHFILL...
  CAVE SPRINGS...WAR EAGLE...DECATUR...HIWASSE...BELLA VISTA AND
  GARFIELD.

DAMAGING WINDS ARE LIKELY WITH THESE STORMS...MOVE TO A SAFE PLACE
NOW. MOBILE HOMES AND VEHICLES ARE ESPECIALLY SUSCEPTIBLE TO HIGH
WINDS AND MAY BE OVERTURNED.

LAT...LON 3650 9461 3635 9460 3614 9448 3616 9433
          3621 9430 3624 9386 3649 9385

$$

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 11, 9:35 PM CDT, 1 hour 49 minutes earlier.

Area forecast discussion, Jul 11, 9:35 PM CDT, 1 hour 49 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OKLAHOMA
935 PM CDT FRI JUL 11 2003

CONVECTION GRADUALLY FILLING IN ALONG STRENGTHENING BOUNDARY WHILE
INDIVIDUAL CELLS ARE GAINING A MORE SOUTHERLY COMPONENT TO THEIR
MOVEMENT.  SEVERE WEATHER PARAMETERS /DEEP LAYER SHEAR...ELEVATED
INSTABILITY/  REMAIN FAVORABLE FOR A CONTINUATION OF A SEVERE
WEATHER THREAT.  A NEW WEATHER WATCH WILL BE FORTHCOMING.

WILL TAPER POPS OFF FURTHER SOUTH AS INSTABILITY AND FORCING REALLY
TAPERS OFF.

FORECAST ID= 07

.TSA...
AR...NONE.
OK...NONE.

Hazardous weather outlook, Jul 11, 4:40 PM CDT, 6 hours 44 minutes before

ARZ001-002-010-011-019-020-029-OKZ049-053>076-121100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
440 PM CDT FRI JUL 11 2003

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TODAY

SEVERE WEATHER OUTLOOK

...CHANCE OF SEVERE THUNDERSTORMS TONIGHT...

THUNDERSTORMS WILL DEVELOP THIS EVENING ACROSS CENTRAL KANSAS IN THE
VICINITY OF A WEAK COLD FRONT.  THE AIRMASS SOUTH OF THE FRONT HAS
BECOME INCREASINGLY UNSTABLE AND THUNDERSTORMS WHICH DEVELOP WILL
MOVE SOUTHWARD APPROACHING NORTHEAST OKLAHOMA BY LATE EVENING.
THE FAVORED AREA FOR OVERNIGHT SEVERE WEATHER WILL BE NORTH OF
INTERSTATE 40.  WINDS ALOFT AND ABUNDANT INSTABILITY ARE FAVORABLE
FOR SEVERE THUNDERSTORM DEVELOPMENT WITH HAIL TO THE SIZE OF
QUARTERS AND WINDS TO 80 MPH POSSIBLE.

THUNDERSTORM CHANCES WILL BE HIGHEST ACROSS NORTHERN LOCATIONS
OVERNIGHT WITH CHANCES GRADUALLY SHIFTING SOUTHWARD DURING SATURDAY
MORNING.

WARNING PROBABILITIES FOR SEVERE THUNDERSTORMS AND TORNADOES CAN BE
FOUND IN THE OUTLOOK SECTION AT: WWW.SRH.NOAA.GOV/TULSA. GIVEN
PROBABILITIES REPRESENT THE POTENTIAL FOR A WARNING TO BE ISSUED AT
YOUR LOCATION.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
THUNDERSTORMS WILL CONTINUE ACROSS EASTERN OKLAHOMA AND NORTHWEST
ARKANSAS INTO SATURDAY AS THE COLD FRONT SLOWLY MOVES THROUGH THE
AREA. SEVERE THUNDERSTORMS WILL BE POSSIBLE AS THE AIRMASS REMAINS
MODERATELY UNSTABLE ACROSS THE AREA. THE CHANCE OF THUNDERSTORMS
WILL DIMINISH ON SUNDAY AS THE COLD FRONT MOVES INTO NORTHERN TEXAS.
MONDAY THROUGH THURSDAY WILL BE HOT AND DRY AS HIGH PRESSURE
PREVAILS AT THE SURFACE AND ALOFT.

.SPOTTER / EMERGENCY MANAGEMENT ACTION STATEMENT...SPOTTER
ACTIVATION MAY BE NEEDED TONIGHT...MAINLY FOR AREAS NORTH OF
INTERSTATE 40.

ADDITIONAL WEATHER INFORMATION CAN BE FOUND AT...
WWW.SRH.NOAA.GOV/TULSA

In the hours before

Special weather statement, Jul 11, 9:42 PM CDT, 1 hour 42 minutes before

ARZ001>002-010-OKZ055>058-061>063-068>069-120800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
942 PM CDT FRI JUL 11 2003

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
#729 UNTIL 300 AM CDT SATURDAY MORNING FOR THE FOLLOWING AREAS:

IN ARKANSAS THIS WATCH INCLUDES 4 COUNTIES...
IN NORTHWEST ARKANSAS:

BENTON                CARROLL               MADISON
WASHINGTON

IN OKLAHOMA THIS WATCH INCLUDES 9 COUNTIES...
IN EAST CENTRAL OKLAHOMA:

CHEROKEE

IN NORTHEAST OKLAHOMA:

ADAIR                 CRAIG                 DELAWARE
MAYES                 NOWATA                OTTAWA
ROGERS                WASHINGTON

THIS INCLUDES THE CITIES OF BARTLESVILLE...BENTONVILLE...
BERRYVILLE...CLAREMORE...EUREKA SPRINGS...FAYETTEVILLE...
HUNTSVILLE...JAY...MIAMI...NOWATA...PRYOR...ROGERS...SILOAM
SPRINGS...SPRINGDALE...STILWELL...TAHLEQUAH AND VINITA.

Special weather statement, Jul 11, 11:10 PM CDT, 14 minutes before

ARZ001-120515-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1110 PM CDT FRI JUL 11 2003

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY EFFECTIVE UNTIL 1215 AM CDT FOR THE FOLLOWING
COUNTY:

IN NORTHWEST ARKANSAS
     EASTERN BENTON

AT 1110 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 13 MILES NORTH OF PEA RIDGE TO 7 MILES NORTHEAST
OF GATEWAY...MOVING SOUTHEAST AT 35 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED BY THESE STORMS
INCLUDE...WALNUT HILL...BLAND...HILL TOP...ROGERS...LOWELL...PEA
RIDGE...GATEWAY...WAR EAGLE...MONTE NE...LOOKOUT...LARUE...AVOCA AND
GARFIELD.

WIND GUSTS TO 50 MPH MAY PRECEDE THE LINE OF THUNDERSTORMS. RESIDENTS IN
THESE AREAS SHOULD REMAIN ALERT IN CASE THE ADVISORY IS UPGRADED TO
A WARNING.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 10:53 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	52 min
Jul 11, 11:39 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	81 min
Jul 12, 5:52 AM CDT	Severe Thunderstorm Warning	TSA	Carroll	53 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2003 Every severe thunderstorm warning in 2003

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.