Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 370, NWS Tulsa, OK

September 7, 2001Creek County, Tulsa County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Sep 7, 2001, 8:03 PM CDT for Creek County, Tulsa County, Oklahoma. It was in force for 57 min. 4 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: Sep 7, 2001, 8:03 PM CDT (01:03 UTC)
Expired: Sep 7, 2001, 9:00 PM CDT
In force: 57 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Creek County, OK, Tulsa County, OK

The radar

The Tulsa radar (KINX), 43 km from the middle of the area, began a volume at 01:14 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
Sep 7, 8:20 PM CDT	Thunderstorm Wind 61 E	Sand Spgs, OK
Sep 7, 8:45 PM CDT	Thunderstorm Wind 61 E	Talala, OK
Sep 7, 9:08 PM CDT	Thunderstorm Wind 52 E	Verdigris, OK
Sep 7, 9:10 PM CDT	Thunderstorm Wind 61 E	Beggs, 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
Sep 7, 7:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 1.1 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: 263 J/kg
Mixed-layer CIN: -214 J/kg
Mixed-layer LCL: 1305 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -133 m²/s²
0-3 km storm-relative helicity: -52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

030 
WUUS54 KTSA 080103
SVRTUL
OKC037-131-143-080200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
803 PM CDT FRI SEP 7 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  CREEK COUNTY IN NORTHEAST OKLAHOMA
  ROGERS COUNTY IN NORTHEAST OKLAHOMA
  TULSA COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 900 PM CDT

* AT 802 PM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO
  70 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 23 MILES NORTHWEST 
  OF TALALA TO 16 MILES NORTHWEST OF COLLINSVILLE TO 12 MILES        
  SOUTHWEST OF MANNFORD...MOVING EAST AT 30 MPH.

* SOME LOCATIONS AFFECTED INCLUDE... SAPULPA...KELLYVILLE...
  MANNFORD...KIEFER...MOUNDS...DEPEW...SLICK...BRISTOW...BROKEN
  ARROW...COLLINSVILLE...SPERRY...GLENPOOL...OWASSO...JENKS...
  BIXBY...SAND SPRINGS...TULSA...CHELSEA...TALALA...OOLOGAH...
  FOYIL...VERDIGRIS...CATOOSA AND CLAREMORE.

DAMAGING WINDS ARE LIKELY WITH THESE STORMS...MOVE TO A SAFE PLACE
NOW.

IN ADDITION TO DAMAGING WINDS...LARGE HAIL IS ALSO LIKELY WITH THESE
STORMS.

DAMAGING WINDS MAY OCCUR AHEAD OF THE HEAVY RAIN AND HAIL. MOVE TO A 
SAFE PLACE NOW.

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

LAT...LON 3644 9600 3621 9604 3617 9630 3567 9666
          3572 9634 3588 9588 3659 9539 3661 9580
          3644 9583

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 Sep 7, 7:07 PM CDT, 56 minutes earlier.

Area forecast discussion, Sep 7, 7:07 PM CDT, 56 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
707 PM CDT FRI SEP 7 2001

WILL UPDATE FOR NEW TORNADO WATCH NUMBER 720 IN EFFECT UNTIL
MIDNIGHT.

MESONET WINDS AND 3 HOURLY PRESSURE FALLS SUGGEST THAT TORNADO
THREAT SHUD REMAIN N OF I-40.  PRIMARY SEVERE WEATHER
THREAT...HOWEVER...WILL BE LARGE HAIL AND DAMAGING WINDS.

ALSO PUSHED OFF POPS FOR FAR SE OK AND NW AR UNTIL AFTER MIDNIGHT.

UPDATE OUT AROUND 715 PM.

FCSTID = 18

.TSA...
AR...NONE.
OK...TORNADO WATCH UNTIL MIDNIGHT CDT SATURDAY FOR ZONES
OKZ054>068...OKZ070>071...OKZ073.

In the hours before

Local storm report, Sep 7, 6:42 PM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
642 PM CDT FRI SEP 07 2001

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

0635 PM    WEBB CITY                 OK    1 INCH HAIL
09/07/01   OSAGE                           QUARTER SIZE HAIL.
                                           PUBLIC REPORT.

Local storm report, Sep 7, 6:44 PM CDT, 1 hour 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
644 PM CDT FRI SEP 7 2001

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

0635 PM    WEBB CITY                 OK    1 INCH HAIL
09/07/01   OSAGE                           QUARTER SIZE HAIL.
                                           PUBLIC REPORT.

Local storm report, Sep 7, 7:32 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
732 PM CDT FRI SEP 07 2001

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

0645 PM    1 W SHIDLER               OK    .75 INCH HAIL
09/07/01   OSAGE                           DIME SIZE HAIL. PUBLIC
                                           REPORT.

0720 PM    10 W CLEVELAND            OK    .75 INCH HAIL
09/07/01   PAWNEE                          DIME SIZE HAIL. SPOTTER
                                           REPORT.

0720 PM    10 W CLEVELAND            OK    65 MPH TSTM GUST
09/07/01   PAWNEE                          SPOTTER REPORT.

Local storm report, Sep 7, 7:37 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
737 PM CDT FRI SEP 07 2001

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

0735 PM    HOMINY                    OK   70 MPH WIND GUST
09/07/01   OSAGE                          REPORTED BY HAM SPOTTER

0730 PM    5W HOMINY                 OK   1.75 INCH HAIL
09/07/01   OSAGE                          REPORTED BY PUBLIC

Local storm report, Sep 7, 7:44 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
744 PM CDT FRI SEP 7 2001

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

0710 PM    8 SE FORAKER              OK    60 MPH TSTM GUST
09/07/01   OSAGE                           MESONET REPORT.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 7:27 PM CDT	Severe Thunderstorm Warning	TSA	Creek	63 min
Sep 7, 7:38 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	52 min
Sep 7, 7:38 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	52 min
Sep 7, 7:59 PM CDT	Severe Thunderstorm Warning	TSA	Nowata	61 min
Sep 7, 8:03 PM CDT	Severe Thunderstorm Warning	TSA	Rogers	57 min
Sep 7, 8:10 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	50 min
Sep 7, 8:22 PM CDT	Severe Thunderstorm Warning	TSA	Craig	38 min
Sep 7, 8:39 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee, Wagoner	51 min
Sep 7, 8:55 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	35 min
Sep 7, 8:57 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	63 min
Sep 7, 8:57 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	63 min
Sep 7, 8:57 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	33 min
Sep 7, 9:13 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee	62 min
Sep 7, 9:13 PM CDT	Severe Thunderstorm Warning	TSA	Wagoner	62 min
Sep 7, 9:39 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	66 min
Sep 7, 9:40 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	65 min
Sep 7, 9:41 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee	64 min
Sep 7, 10:11 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	64 min
Sep 7, 10:14 PM CDT	Severe Thunderstorm Warning	TSA	Adair	61 min
Sep 7, 10:30 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	60 min
Sep 7, 10:39 PM CDT	Severe Thunderstorm Warning	TSA	Haskell	66 min
Sep 7, 10:54 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Sequoyah, Wagoner	66 min
Sep 7, 10:59 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	46 min
Sep 7, 11:13 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	47 min
Sep 7, 11:24 PM CDT	Severe Thunderstorm Warning	TSA	Adair	51 min
Sep 7, 11:31 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pushmataha	59 min
Sep 7, 11:42 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	63 min
Sep 8, 12:19 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	56 min
Sep 8, 1:15 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	60 min
Sep 8, 3:41 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer	64 min
Sep 8, 3:50 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	55 min
Sep 8, 4:45 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	60 min
Sep 8, 5:18 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	57 min
Sep 8, 5:30 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	60 min
Sep 8, 6:09 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	66 min
Sep 8, 6:14 PM CDT	Flash Flood Warning	TSA	Latimer	3 hr
Sep 8, 6:30 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	60 min
Sep 8, 6:43 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	62 min

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.