Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 201, NWS Tulsa, OK

May 27, 2001Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2001, 7:30 PM CDT for Pawnee County, Oklahoma. It was in force for 45 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 27, 2001, 7:30 PM CDT (00:30 UTC)
Expired: May 27, 2001, 8:15 PM CDT
In force: 45 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Pawnee County, OK

The radar

The Tulsa radar (KINX), 112 km from the middle of the area, began a volume at 00:35 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
May 27, 8:25 PM CDT	Thunderstorm Wind 52 M	Pawnee, 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.

Issued	Product	Office	Lasted
May 27, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.5 hours before the alert went out and 137 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: 2894 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1394 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 280031
SVRTUL

OKC117-280115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
730 PM CDT SUN MAY 27 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PAWNEE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 815 PM CDT

* AT 730 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5
  MILES NORTHWEST OF PAWNEE...MOVING SOUTHEAST AT 20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...CLEVELAND...
  SKEDEE...MARAMEC...HALLETT...TERLTON AND PAWNEE.

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

LAT...LON 3649 9701 3631 9701 3617 9648 3629 9644

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 27, 3:55 PM CDT, 3 hours 35 minutes earlier.

Area forecast discussion, May 27, 3:55 PM CDT, 3 hours 35 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
355 PM CDT SUN MAY 27 2001

STRONG/SEVERE THUNDERSTORMS ONGOING AT THIS TIME ACROSS SOUTHEAST KS
AND NORTHEAST OK NEAR THE KS BORDER.  AMS VERY UNSTABLE ACROSS THE
AREA...AND ACTIVITY EXPECTED TO CONTINUE TO SPREAD SLOWLY TO THE SE
AND SSE INTO THE EARLY EVENING HOURS.  STORMS EXPECTED TO THEN
WEAKEN WITH FOCUS TURNING TOWARD ADDITIONAL COMPLEX OF STORMS NOW
DEVELOPING OVER WESTERN KS.

OVERNIGHT MCS EXPECTED TO DROP FROM WESTERN KS DOWN ACROSS OK
AFFECTING MAINLY SOUTHERN PARTS OF THE AREA LATE TONIGHT INTO MONDAY
MORNING.  STILL UNSURE HOW ANY OUTFLOWS OR LINGERING BOUNDARIES FROM
CURRENT CONVECTION WILL AFFECT STORMS LATER ON.  WILL GENERALLY GO
WITH LIKELY POPS OVER THE ENTIRE AREA FOR THE TONIGHT PERIOD...AND
MENTION POSSIBILITY OF SEVERE ALL AREAS.  NORTHEAST OK AND NORTHWEST
AR FOR CURRENT ACTIVITY...AND SOUTHEAST OK FOR LATE NIGHT STORMS.

WILL CONTINUE TO SEE NORTHWESTERLY FLOW PATTERN THROUGH MUCH OF THE
UPCOMING WEEK...SO ADDITONAL WEAK IMPULSES WILL KEEP CHANCE POPS IN
THE FORECAST THROUGH FRIDAY.  WILL CUT DAYTIME TEMPS SOME FOR
TOMORROW DUE TO EXPECTED CLOUD COVER FROM PASSING MCS...THEN LITTLE
DAY TO DAY CHANGE IN TEMPS FOR MUCH OF THE REST OF THE WEEK.

FCSTID = 4
TUL   64  78  62  82 /  70  30  30  30
FSM   64  78  62  83 /  60  40  30  30
MLC   64  78  62  83 /  60  40  30  30
BVO   60  78  58  80 /  70  30  30  30
FYV   60  75  56  78 /  70  30  30  30
BYV   60  75  56  78 /  60  30  30  30
MIO   61  77  58  79 /  70  30  30  30
MKO   64  78  62  82 /  70  40  30  30
F10   64  78  62  82 /  70  40  30  30
HHW   63  80  63  83 /  60  50  30  30

.TSA...
AR...SEVERE THUNDERSTORM WATCH UNTIL 700 PM CDT SUNDAY FOR ZONES
ARZ001...ARZ010.

OK...SEVERE THUNDERSTORM WATCH UNTIL 700 PM CDT SUNDAY FOR ZONES
OKZ054>064...OKZ067>069.

In the hours before

Local storm report, May 27, 3:58 PM CDT, 3 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
358 PM CDT SUN MAY 27 2001

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

031z4 PM    FORAKER                   OK    .88 INCH HAIL
05/27/01   OSAGE                           REPORTED BY PUBLIC

Local storm report, May 27, 4:00 PM CDT, 3 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
400 PM CDT SUN MAY 27 2001

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

035*0 PM    4 W PAWHUSKA              OK    60 MPH TSTM GUST
05/27/01   OSAGE                           REPORTED BY SPOTTER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:03 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	57 min
May 27, 7:47 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee	58 min
May 27, 8:00 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	60 min
May 27, 8:10 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	50 min
May 27, 8:10 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	50 min
May 27, 8:43 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	32 min
May 27, 8:53 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	52 min
May 27, 8:54 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	66 min
May 27, 8:58 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	47 min
May 27, 9:33 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	42 min
May 27, 9:41 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	19 min
May 27, 9:43 PM CDT	Severe Thunderstorm Warning	TSA	Haskell	47 min
May 27, 10:00 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	45 min
May 27, 10:02 PM CDT	Severe Thunderstorm Warning	TSA	Creek	43 min
May 27, 10:25 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	50 min
May 27, 11:20 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	55 min
May 28, 12:11 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, McIntosh, Pittsburg, Pushmataha	64 min
May 28, 12:35 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw	40 min
May 28, 1:14 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw	61 min
May 28, 2:04 AM CDT	Flash Flood Warning	TSA	LeFlore	3 hr

Nearby

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; radar from the NEXRAD Level II archive.