Alert archive / Arkansas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 18, NWS Tulsa, OK

March 9, 2002Benton County, Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 9, 2002, 1:57 AM CST for Benton County, Washington County, Arkansas. It was in force for 48 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: Mar 9, 2002, 1:57 AM CST (07:57 UTC)
Expired: Mar 9, 2002, 2:45 AM CST
In force: 48 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

Counties Benton County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 101 km from the middle of the area, began a volume at 07:56 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
Mar 9, 2:00 AM CST	Thunderstorm Wind 61 E	Bella Vista, AR	Thunderstorm winds estimated at 70 miles an hour blew a tree 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.

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
Mar 8, 9:30 PM CST	Tornado Watch	SPC	5 hr
Mar 9, 1:00 AM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.0 hours before the alert went out and 90 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: 217 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 955 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 414 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 090757
SVRTUL
ARC007-143-090845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
156 AM CST SAT MAR 9 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  BENTON COUNTY IN NORTHWEST ARKANSAS
  WASHINGTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 245 AM CST

* AT 156 AM CST SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO
  65 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 3 MILES NORTHEAST  
  OF PEA RIDGE TO 9 MILES WEST OF STRICKLER...MOVING EAST AT 45 MPH.

THESE STORMS HAVE A HISTORY OF PRODUCING WIND DAMAGE AND WILL LIKELY 
AFFECT A LARGE PORTION OF THE WARNED AREA WITH WIDESPREAD DAMAGING 
WINDS. PERSONS IN THESE AREAS SHOULD TAKE COVER FROM THESE STORMS.

LAT...LON 3649 9461 3577 9452 3576 9394 3650 9386

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 Mar 8, 10:00 PM CST, 3 hours 57 minutes earlier.

Area forecast discussion, Mar 8, 10:00 PM CST, 3 hours 57 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1000 PM CST FRI MAR 8 2002

STRONG CONVECTION CONTINUES OVER FAR EASTERN SECTIONS OF FA.  BELIEVE
THIS AREA WILL SHIFT EAST INTO CENTRAL ARK OVER THE NEXT HOUR OR SO.
MAIN CONVECTIVE LINE WITH FRONTAL BOUNDARY WILL MOVE INTO OSAGE AND
PAWNEE COUNTIES WITHIN THE HOUR.  LINE HAS WEAKENED SOMEWHAT...BUT
SEVERE THREAT SHOULD CONTINUE OVERNIGHT WITH DAMAGING WINDS THE MAIN
THREAT...PRIMARILY NORTH OF I-40.  ALSO INCLUDED REMAINDER OF FA IN
WIND ADVISORY OVERNIGHT AS WINDS WILL INCREASE SIGNIFICANTLY BEHIND
THE FRONT. ALREADY SENT UPDATED ZONES...MAINLY FOR WATCH/ADVISORY
CONFIGURATIONS.

FCSTID = 12

.TSA...
AR...WIND ADVISORY FOR TONIGHT THROUGH SATURDAY MORNING FOR
ZONES ARZ001>002...ARZ010>011.
...TORNADO WATCH IN EFFECT UNTIL 200 AM FOR ZONES ARZ001-ARZ002-
ARZ010-ARZ011-ARZ019-ARZ020-ARZ029.

OK...WIND ADVISORY FOR TONIGHT THROUGH SATURDAY MORNING FOR ZONES
OKZ054>071.
...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 200 AM FOR ZONES
OKZ054>056-OKCZ059-OKZ060-OKZ061-OKZ064.
...TORNADO WATCH IN EFFECT UNTIL 200 AM FOR ZONES OKZ069-OKZ072-
OKZ074>OKZ076-OKZ049-OKZ053.

In the hours before

Local storm report, Mar 8, 11:59 PM CST, 1 hour 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1159 PM CST FRI MAR 08 2002

TIME(CST)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0955 PM    CECIL                     AR    WIND DAMAGE
03/08/02   FRANKLIN                        SPOTTERS REPORTED
                                           SEVERAL TREES DOWN

Local storm report, Mar 9, 12:38 AM CST, 1 hour 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1238 AM CST SAT MAR 09 2002

TIME(CST)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1236 AM    PRYOR                     OK    WIND DAMAGE
03/09/02   MAYES                           ROOF DAMAGE TO A HOME
                                           IN THE SOUTH SIDE OF
                                           PRYOR

Local storm report, Mar 9, 12:45 AM CST, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1245 AM CST SAT MAR 09 2002

TIME(CST)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0955 PM    CECIL                     AR    WIND DAMAGE
03/08/02   FRANKLIN                        SPOTTERS REPORTED
                                           SEVERAL TREES DOWN

1205 AM    WELCH                     OK    64 MPH TSTM GUST
03/09/02   CRAIG                           MEASURED MESONET WIND
                                           GUST

1236 AM    PRYOR                     OK    WIND DAMAGE
03/09/02   MAYES                           ROOF DAMAGE TO A HOME
                                           IN THE SOUTH SIDE OF
                                           PRYOR

Special weather statement, Mar 9, 12:47 AM CST, 1 hour 10 minutes before

OKZ054>056-059>061-064-090700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1247 AM CST SAT MAR 9 2002

...SEVERE THUNDERSTORM WATCH NUMBER 12 HAS BEEN CANCELED FOR
PORTIONS OF NORTHEAST OKLAHOMA...

...ADDITIONAL THUNDERSTORMS EXPECTED OVERNIGHT...

THE LINE OF STRONG TO SEVERE THUNDERSTORMS HAS PUSHED EAST OF THE
WATCH AREA. THEREFORE...THE SEVERE THUNDERSTORM WATCH HAS BEEN
CANCELED FOR PARTS OF NORTHEAST OKLAHOMA.

THIS INCLUDES THE FOLLOWING COUNTIES IN NORTHEAST OKLAHOMA:
OSAGE...PAWNEE...WASHINGTON...NOWATA...ROGERS...TULSA AND
CREEK.

THE LINE OF STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO PUSH
RAPIDLY EAST ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS DURING
THE EARLY MORNING HOURS.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION
FOR THE LATEST ON THIS DEVELOPING SEVERE WEATHER EVENT. ADDITIONAL
WEATHER INFORMATION...INCLUDING RELATED GRAPHICS CAN BE FOUND AT:
WWW.SRH.NOAA.GOV/TULSA.

Local storm report, Mar 9, 1:28 AM CST, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
128 AM CST SAT MAR 09 2002

TIME(CST)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1250 AM    2 NW EUCHA                OK    WIND DAMAGE
03/09/02   DELAWARE                        EMERGENCY MANAGEMENT
                                           REPORTED TREES DOWN

Local storm report, Mar 9, 1:34 AM CST, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
134 AM CST SAT MAR 09 2002

TIME(CST)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1250 AM    2 NW EUCHA                OK    WIND DAMAGE
03/09/02   DELAWARE                        EMERGENCY MANAGEMENT
                                           REPORTED TREES DOWN

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 8, 9:55 PM CST	Severe Thunderstorm Warning	TSA	Franklin	50 min
Mar 9, 1:00 AM CST	Severe Thunderstorm Warning	TSA	Benton, Washington	60 min
Mar 9, 1:51 AM CST	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	69 min
Mar 9, 2:10 AM CST	Severe Thunderstorm Warning	TSA	Carroll, Franklin, Madison	65 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2002 Every severe thunderstorm warning in 2002

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.