Alert archive / Arkansas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 84, NWS Tulsa, OK

April 15, 2001LeFlore County, Oklahoma; Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 15, 2001, 3:54 AM CDT for LeFlore County, Oklahoma; Franklin County, Sebastian County, Arkansas. It was in force for 66 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Apr 15, 2001, 3:54 AM CDT (08:54 UTC)
Expired: Apr 15, 2001, 5:00 AM CDT
In force: 66 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Franklin County, AR, Sebastian County, AR, LeFlore County, OK

What was reported inside it

Time	Report	Where	Remark
Apr 15, 4:20 AM CDT	Hail 0.75	Greenwood, AR

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.

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 15, 1:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.9 hours before the alert went out and 190 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: 56 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1245 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 65 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.

902 
WUUS54 KTSA 150854
SVRTUL
ARC047-131-OKC079-151000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
354 AM CDT SUN APR 15 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA
  SOUTHERN FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS
  SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS

* UNTIL 500 AM CDT

* AT 353 AM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 3 MILES SOUTH OF DENNING TO 3 MILES EAST OF
  BLOOMER TO 3 MILES NORTHWEST OF JENNY LIND TO 8 MILES NORTH OF
  BOKOSHE...MOVING SOUTHEAST AT 35 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...BLOOMER...
  JENNY LIND...FT CHAFFEE...BONANZA...MANSFIELD...EXCELSIOR...
  BURNVILLE...WASHBURN...MIDLAND...HUNTINGTON...LAVACA...BARLING...
  GREENWOOD...HACKETT...HARTFORD...FORT SMITH...ALTUS...DENNING...
  BRANCH...ARKOMA...POCOLA...SPIRO...BOKOSHE...PANAMA...CAMERON...
  WISTER...HOWE...FANSHAWE...POTEAU AND MOFFETT.

WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA.

LAT...LON 3545 9369 3536 9489 3488 9490 3496 9368

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 Apr 15, 3:15 AM CDT, 39 minutes earlier.

Area forecast discussion, Apr 15, 3:15 AM CDT, 39 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
315 AM CDT SUN APR 15 2001

STRONG TO SVR MCS CURRENTLY PUSHING SE THROUGH EAST-CENTRAL OK/NW
ARK. TSTM LINE HAS PRODUCED WIDESPREAD WIND DAMAGE/HAIL ACROSS MUCH
OF NE OK/NW ARK EARLY THIS MORNING.  STRONG 50KT LOW LEVEL JET WILL
CONTINUE TO MAINTAIN LINE AS IT MOVES SE THROUGH THE REMAINDER OF
FA.  LINE SHOULD MOVE SOUTH OF AREA AROUND 600 AM WITH SVR WX THREAT
ENDING.

GOOD CLEARING NOTED BEHIND FRONT WITH ONLY SCT LOW CLOUDS OVER SE
KANSAS.  WITH SKIES BECOMING MOSTLY SUNNY THIS MORNING...TEMPS
SHOULD REBOUND BACK INTO THE 70S ALL AREAS.  WILL TREND MORE TOWARD
THE WARMER NGM MOS GUIDANCE ON HIGH TEMPS...ALTHOUGH IS LIKELY TOO
WARM ON FORECASTED LOWS.  MILD/DRY WX EXPECTED THROUGH MID WEEK.
SFC WINDS BECOME EASTERLY ON MONDAY AS INITIAL SFC HIGH SHIFTS
EAST.  SECONDARY SURGE OF COLDER AIR EXPECTED MONDAY AFTERNOON AS
ARCTIC HIGH PRESSURE BUILDS INTO THE SOUTHERN PLAINS. NORTHERN ZONES
WILL BE CLOSE TO FREEZING BY TUE MORNING...HOWEVER WINDS WILL KEEP
TEMPS FROM BOTTOMING OUT. SIGNIFICANT FREEZE STILL APPEARS LIKELY
TUE NIGHT/WED MORNING AS WINDS DROP OFF UNDER CLEAR SKIES.

HIGH SHIFTS EAST BY THU WITH WARMING TREND INTO THE WEEKEND. PRECIP
CHANCES APPEAR TOO LOW AT THIS TIME TO INTRODUCE POPS...AND WILL
KEEP EXTENDED DRY FOR NOW.

FCSTID = 12

PRELIM NUMBERS:
TUL   75  44  67  34 /   0   0   0   0
FSM   75  47  70  35 /   0   0   0   0
MLC   78  47  72  36 /   0   0   0   0
BVO   73  40  62  33 /   0   0   0   0
FYV   72  42  60  32 /   0   0   0   0
BYV   72  42  60  32 /   0   0   0   0
MIO   72  42  62  33 /   0   0   0   0
MKO   78  47  72  36 /   0   0   0   0
F10   75  44  67  34 /   0   0   0   0
HHW   80  49  76  38 /   0   0   0   0

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

In the hours before

Local storm report, Apr 15, 2:19 AM CDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
219 AM CDT SUN APR 15 2001

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

0142 AM    3 N LOCUST GROVE          OK    65 MPH TSTM GUST
04/15/01   MAYES                           SPOTTER REPORT

Local storm report, Apr 15, 2:33 AM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
233 AM CDT SUN APR 15 2001

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

0218 AM    BROKEN ARROW              OK    .75 INCH HAIL
04/15/01   TULSA                           91ST AND MAIN SPOTTER
                                           REPORT

0220 AM    2 S GLENPOOL              OK    .75 INCH HAIL
04/15/01   TULSA                           DIME HAIL SPOTTER REPORT

0223 AM    COWETA                    OK    .75 INCH HAIL
04/15/01   WAGONER                         DIME HAIL SPOTTER REPORT

Local storm report, Apr 15, 2:58 AM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
258 AM CDT SUN APR 15 2001

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

0105 AM    BERNICE                   OK    WIND DAMAGE
04/15/01   DELAWARE                        1 FOOT TREE BLOCKING
                                           TRAFFIC ON HWY 85A IN
                                           DOWNTOWN BERNICE EM

0105 AM    2 NW ZENA                 OK    WIND DAMAGE
04/15/01   DELAWARE                        2 FOOT TREE BLOWN DOWN
                                           LAYING OVER ROADWAY EM

Local storm report, Apr 15, 3:12 AM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
312 AM CDT SUN APR 15 2001

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

0245 AM    ZENA                      OK    .75 INCH HAIL
04/15/01   DELAWARE                        DIME HAIL EM

Local storm report, Apr 15, 3:21 AM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
321 AM CDT SUN APR 15 2001

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

0105 AM    BERNICE                   OK    WIND DAMAGE
04/15/01   DELAWARE                        HALF OF ROOF TORN AWAY
                                           AT HWY 85A AND BROADWAY

Local storm report, Apr 15, 3:47 AM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
347 AM CDT SUN APR 15 2001

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

0346 AM    3 N MULBERRY              AR    .88 INCH HAIL
04/15/01   CRAWFORD                        SPOTTER REPORT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 7:20 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	70 min
Apr 14, 11:37 PM CDT	Severe Thunderstorm Warning	TSA	Osage	38 min
Apr 15, 12:11 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	49 min
Apr 15, 12:11 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	49 min
Apr 15, 12:58 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Tulsa	47 min
Apr 15, 1:27 AM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes, Rogers	48 min
Apr 15, 1:27 AM CDT	Severe Thunderstorm Warning	TSA	Tulsa	48 min
Apr 15, 1:40 AM CDT	Severe Thunderstorm Warning	TSA	Creek	50 min
Apr 15, 2:05 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	40 min
Apr 15, 2:05 AM CDT	Severe Thunderstorm Warning	TSA	Wagoner	40 min
Apr 15, 2:28 AM CDT	Severe Thunderstorm Warning	TSA	Muskogee	47 min
Apr 15, 3:03 AM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	57 min
Apr 15, 1:27 AM CDT	Severe Thunderstorm Warning	TSA	Benton	48 min
Apr 15, 2:05 AM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	40 min
Apr 15, 3:03 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin	57 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2001 Severe Thunderstorm Warnings in Oklahoma, 2001 Every severe thunderstorm warning in 2001

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.