Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 95, NWS Tulsa, OK

April 23, 2001Benton County, Arkansas; Adair County, Delaware County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 23, 2001, 12:52 AM CDT for Benton County, Arkansas; Adair County, Delaware County, Oklahoma. It was in force for 53 min. 3 reports 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 23, 2001, 12:52 AM CDT (05:52 UTC)
Expired: Apr 23, 2001, 1:45 AM CDT
In force: 53 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Benton County, AR, Adair County, OK, Delaware County, OK

The radar

The Tulsa radar (KINX), 95 km from the middle of the area, began a volume at 05:55 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
Apr 23, 1:02 AM CDT	Thunderstorm Wind 52 E	Watts, OK
Apr 23, 1:02 AM CDT	Thunderstorm Wind 52 E	West Siloam Spgs, OK
Apr 23, 1:05 AM CDT	Thunderstorm Wind 52 E	Siloam Spgs, 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 22, 7:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.9 hours before the alert went out and 95 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: 19 J/kg
Mixed-layer CIN: -256 J/kg
Mixed-layer LCL: 1428 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 230552
SVRTUL
ARC007-OKC001-041-230645-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1252 AM CDT MON APR 23 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ADAIR COUNTY IN NORTHEAST OKLAHOMA
  SOUTHEASTERN DELAWARE COUNTY IN NORTHEAST OKLAHOMA
  WESTERN BENTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 145 AM CDT

* AT 1252 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7
  MILES WEST OF WATTS...MOVING NORTHEAST AT 35 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BELLA VISTA...
  HIWASSE...DECATUR...CAVE SPRINGS...HIGHFILL...SPRINGTOWN...
  GENTRY...ROGERS...SILOAM SPRINGS...BENTONVILLE...WEST SILOAM
  SPRINGS AND WATTS.

HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN
THE WARNED AREA.

A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY
FROM SEVERXE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS.

LAT...LON 3624 9471 3601 9473 3629 9411 3653 9429

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 22, 11:55 PM CDT, 57 minutes earlier.

Area forecast discussion, Apr 22, 11:55 PM CDT, 57 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1155 PM CDT SUN APR 22 2001

UPDATED AGAIN TO CLEAR PORTION OF CWA FROM WATCH...ROUGHLY ZONES
WEST OF A VINITA TO OKEMAH LINE. STORMS HAVE BEEN WEAKENING AS THEY
MOVE EAST...LEAVING BEHIND SHALLOW SURFACE MOISTURE AS TRUE FRONT
APPROACHES. WENT AHEAD AND LEFT LOW POPS IN ZONES CLEARED FROM WATCH
JUST IN CASE SOMETHING GETS GOING ALONG FRONT. MADE MINOR TWEAKS TO
WINDS AS WELL.

FCSTID = 23

.TSA...
AR...TORNADO WATCH UNTIL 100 AM CDT MONDAY FOR ZONES ARZ001...
ARZ010...ARZ019...ARZ029.

OK...TORNADO WATCH UNTIL 100 AM CDT MONDAY FOR ZONES
OKZ049...OKZ053...OKZ058...OKZ063...OKZ068>076.

In the hours before

Local storm report, Apr 22, 8:41 PM CDT, 4 hours 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
841 PM CDT SUN APR 22 2001

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

0730 PM    2 SE AVANT                OK    60 MPH TSTM GUST
04/22/01   OSAGE                           SPOTTER REPORT

0730 PM    1 N SKIATOOK              OK    60 MPH TSTM GUST
04/22/01   TULSA                           SPOTTER REPORT

Local storm report, Apr 22, 8:42 PM CDT, 4 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
842 PM CDT SUN APR 22 2001

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

0730 PM    4 SW RAMONA               OK    60 MPH TSTM GUST
04/22/01   WASHINGTON                      SPOTTER REPORT

Local storm report, Apr 22, 11:30 PM CDT, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1130 PM CDT SUN APR 22 2001

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

1115 PM    4 NNW GROVE               OK    WIND DAMAGE
04/22/01   DELAWARE                        POWER LINES DOWN
                                           EMERGENCY MANAGER

Special weather statement, Apr 22, 11:38 PM CDT, 1 hour 14 minutes before

OKZ049-053>058-060>062-064>076-ARZ001-010-019-029-230600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1138 PM CDT SUN APR 22 2001

...TORNADO WATCH NUMBER 175 CANCELLED FOR PARTS OF EASTERN
OKLAHOMA...

TORNADO WATCH NUMBER 175 HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES IN EASTERN OKLAHOMA...

CRAIG...CREEK...MAYES...NOWATA...OKFUSKEE...OKMULGEE...OSAGE...
ROGERS...TULSA...WAGONER...WASHINGTON

TORNADO WATCH NUMBER 175 REMAINS IN EFFECT UNTIL 1 AM FOR THE
FOLLOWING COUNTIES IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS...

ADAIR...BENTON...CHEROKEE...CHOCTAW...CRAWFORD...DELAWARE...
HASKELL...LATIMER...LE FLORE...MCINTOSH...MUSKOGEE...OTTAWA...
PITTSBURG...PUSHMATAHA...SEBASTIAN...SEQUOYAH...WASHINGTON AR

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 5:29 AM CDT	Severe Thunderstorm Warning	TSA	Sebastian	46 min
Apr 22, 7:25 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	50 min
Apr 22, 7:41 PM CDT	Severe Thunderstorm Warning	TSA	Rogers	49 min
Apr 22, 8:07 PM CDT	Severe Thunderstorm Warning	TSA	Craig	38 min
Apr 22, 8:29 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	46 min
Apr 23, 2:45 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw	60 min
Apr 23, 3:23 AM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	67 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Severe Thunderstorm Warnings in Arkansas, 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; radar from the NEXRAD Level II archive.