Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 144, NWS Tulsa, OK

May 20, 2001Craig County, Mayes County, Rogers County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 20, 2001, 6:33 PM CDT for Craig County, Mayes County, Rogers County, Oklahoma. It was in force for 57 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
May 20, 2001, 6:33 PM CDT (23:33 UTC)
Expired
May 20, 2001, 7:30 PM CDT
In force
57 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Craig County, OK, Mayes County, OK, Rogers County, OK

The radar

The Tulsa radar (KINX), 47 km from the middle of the area, began a volume at 23:36 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

TimeReportWhereRemark
May 20, 6:56 PM CDTHail 0.88White Oak, OK

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.

IssuedProductOfficeLasted
May 20, 5:00 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.6 hours before the alert went out and 145 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2001-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2001-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
1325 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
97 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 202335
SVRTUL
OKC035-097-131-210030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
633 PM CDT SUN MAY 20 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CRAIG COUNTY IN NORTHEAST OKLAHOMA
  WESTERN MAYES COUNTY IN NORTHEAST OKLAHOMA
  ROGERS COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 730 PM CDT

* AT 633 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6
  MILES SOUTHEAST OF FOYIL...MOVING NORTH AT 40 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...OOLOGAH...    
  TALALA... WELCH...  BLUEJACKET...WHITE OAK...BIG CABIN...CHELSEA 
  AND FOYIL.

HAIL TO THE SIZE3 OF QUARTERS WIND GUSTS TO 65 MPH CAN BE EXPECTED IN 
THE WARNED AREA.

LAT...LON 3634 9558 3627 9537 3690 9501 3699 9530

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 May 20, 5:40 PM CDT, 53 minutes earlier.

Area forecast discussion, May 20, 5:40 PM CDT, 53 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
540 PM CDT SUN MAY 20 2001

UPDATED FORECAST TO INCLUDE HEADLINE FOR SEVERE TSTORM WATCH NUMBER
256. STILL WAITING ON POSSIBLE TOR WATCH FOR WESTERN AR...WILL HAVE
TO UPDATE AGAIN WHEN AND IF IT COMES OUT. INCREASED SEVERE THREAT
WORDING IN SEVERAL ZONES GROUPS. NEW STORMS GOING UP AND INCREASING
NOW...ONE IN EAST TULSA COUNTY AND THE ONE IN CREEK COUNTY. OTHER
STORMS GOING UP IN HUGHES AND PONTOTOC COUNTIES COULD ALSO BECOME
QUITE SEVERE AS IT TAPS EXTREME INSTABILITY.

FCSTID = 26

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

In the hours before

Local storm report, May 20, 5:26 PM CDT, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
526 PM CDT SUN MAY 20 2001

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

0450 PM    5 NW HANNA                OK    TORNADO
05/20/01   MCINTOSH                        DAMAGE REPORTED AT
                                           INDIAN NATION TURNPIKE
                                           TOLL BOOTH.

0522 PM   e 2 S STIDHAM               OK    TORNADO
05/20/01   MCINTOSH                        SAME
                                           TORNADO...CONTINUING ENE
Local storm report, May 20, 5:30 PM CDT, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
530 CDT SUN MAY 20 2001

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

0450 PM    5 NW HANNA                OK    TORNADO
05/20/01   MCINTOSH                        DAMAGE REPORTED AT
                                           INDIAN NATION TURNPIKE
                                           TOLL BOOTH.

0522 PM    2 S STIDHAM               OK    TORNADO
05/20/01   MCINTOSH                        SAME
                                           TORNADO...CONTINUING ENE
Local storm report, May 20, 5:52 PM CDT, 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
552 PM CDT SUN MAY 20 2001

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

0548 PM    VIVIAN                    OK    1.75 INCH HAIL
05/20/01   MCINTOSH

0550 PM    2 N BROKEN ARROW          OK    1 INCH HAIL
05/20/01   TULSA
Local storm report, May 20, 6:08 PM CDT, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
608 PM CDT SUN MAY 20 2001

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

K0548 PM    VIVIAN                    OK    1.75 INCH HAIL
05/20/01   MCINTOSH

0550 PM    2 N BROKEN ARROW          OK    1 INCH HAIL
05/20/01   TULSA
Local storm report, May 20, 6:11 PM CDT, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
611 PM CDT SUN MAY 20 2001

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

0556 PM    2 N FAIRFAX               OK    1 INCH HAIL
05/20/01   OSAGE                           REPORTED BY POLICE DEPT

0607 PM    SAND SPGS                 OK    1.75 INCH HAIL
05/20/01   TULSA                           AMATEUR RADIO REPORT
m
Local storm report, May 20, 6:14 PM CDT, 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
614 PM CDT SUN MAY 20 2001

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

053r5 PM    7 SW BURBANK              OK    67 MPH TSTM GUST
05/20/01   OSAGE                           MESONET MEASUREMENT

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 4:17 PM CDTSevere Thunderstorm WarningTSAOsage58 min
May 20, 4:24 PM CDTSevere Thunderstorm WarningTSAOkfuskee, Okmulgee51 min
May 20, 4:30 PM CDTSevere Thunderstorm WarningTSAMcIntosh60 min
May 20, 4:31 PM CDTTornado WarningTSAMcIntosh29 min
May 20, 4:56 PM CDTTornado WarningTSAMcIntosh49 min
May 20, 5:14 PM CDTSevere Thunderstorm WarningTSAOsage61 min
May 20, 5:23 PM CDTSevere Thunderstorm WarningTSACreek52 min
May 20, 5:32 PM CDTTornado WarningTSAOsage43 min
May 20, 5:45 PM CDTTornado WarningTSAMcIntosh60 min
May 20, 5:46 PM CDTSevere Thunderstorm WarningTSATulsa44 min
May 20, 5:51 PM CDTSevere Thunderstorm WarningTSARogers, Wagoner39 min
May 20, 6:02 PM CDTTornado WarningTSAPittsburg58 min
May 20, 6:11 PM CDTTornado WarningTSAHaskell, Muskogee64 min
May 20, 6:12 PM CDTSevere Thunderstorm WarningTSAOsage48 min
May 20, 6:13 PM CDTSevere Thunderstorm WarningTSAPawnee62 min
May 20, 6:16 PM CDTTornado WarningTSAOsage44 min
May 20, 6:41 PM CDTTornado WarningTSAWashington49 min
May 20, 6:43 PM CDTSevere Thunderstorm WarningTSACreek, Tulsa62 min
May 20, 6:56 PM CDTTornado WarningTSAMayes49 min
May 20, 6:59 PM CDTSevere Thunderstorm WarningTSAOsage46 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001Every 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.