Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 280, NWS Tulsa, OK

June 29, 2001Cherokee County, Mayes County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 29, 2001, 1:27 AM CDT for Cherokee County, Mayes County, Oklahoma. It was in force for 63 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: Jun 29, 2001, 1:27 AM CDT (06:27 UTC)
Expired: Jun 29, 2001, 2:30 AM CDT
In force: 63 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Cherokee County, OK, Mayes County, OK

The radar

The Tulsa radar (KINX), 45 km from the middle of the area, began a volume at 06:27 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
Jun 29, 1:30 AM CDT	Hail 0.75	Locust Grove, 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.5 hours before the alert went out and 149 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: 453 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1304 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -70 m²/s²
0-3 km storm-relative helicity: -13 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 290627
SVRTUL
OKC021-097-290730-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
127 AM CDT FRI JUN 29 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  SOUTHERN MAYES COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 230 AM CDT

* AT 127 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5
  MILES SOUTHWEST OF LOCUST GROVE...MOVING SOUTHEAST AT 30 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...LOCUST
  GROVE...CHOUTEAU...SCRAPER...PEGGS...HULBERT AND TAHLEQUAH.

HAIL TO THE SIZE OF NICKELS CAN BE EXPECTED IN THE WARNED AREA.

LAT...LON 3627 9517 3619 9537 3569 9511 3580 9483
          3607 9488

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 Jun 28, 9:30 PM CDT, 3 hours 57 minutes earlier.

Area forecast discussion, Jun 28, 9:30 PM CDT, 3 hours 57 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
930 PM CDT THU JUN 28 2001

CONVECTION OVER SE OK THIS EVENING APPEARS TO BE DIURNALLY BASED AND
HAS BEEN GRADUALLY WEAKENING OVER THE PAST HOUR.
HOWEVER...LOW-LEVEL JET IS STARTING TO KICK IN OVER WRN/CNTRL OK
(AREA PROFILERS SHOWING 20-25KT SWLY 850-875 MB WINDS)...AND HAVE
NOTED AN INCREASE IS ELEVATED CONVECTION OVER CNTRL OK.  00Z MESOETA
SHOWS SOME IMPRESSIVE UPGLIDE ALONG 305K SURFACE OVER ERN OK AFTER
MIDNIGHT...AND SUGGESTS THAT CONVECTION WILL DEVELOP FARTHER E INTO
ENTRL/SE OK LATER TONIGHT.  A GENERAL SWD MOVEMENT IS
EXPECTED...WHICH WILL RESULT IN SOME TRAINING AND LOCALLY HEAVY
RAINFALL.  WILL INCLUDE MENTION OF POSSIBLE HEAVY RAIN FOR SE OK.

WILL LEAVE HIGHEST POPS ACROSS SE OK...AND PLAN ON TRIMMING BACK POPS
ACROSS FAR NE OK AND NW AR.

UPDATE WILL BE OUT AROUND 945 PM.

FCSTID = 18

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

In the hours before

Local storm report, Jun 28, 11:15 PM CDT, 2 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1115 PM CDT THU JUN 28 2001

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

11304 PM    TULSA                     OK    .75 INCH HAIL
06/28/01   TULSA                           REPORTED BY OFF DUTY
                                           NWS EMPLOYEE

Local storm report, Jun 29, 12:48 AM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1248 AM CDT FRI JUN 29 2001

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

1158 PM    TULSA                     OK    1 INCH HAIL
06/28/01   TULSA                           81ST AND HARVARD. PRTD
                                           BY HAM RADIO SPOTTER.

1200 AM    TULSA                     OK    1.25 INCH HAIL
06/29/01   TULSA                           RPTD AT 71ST AND
                                           HARVARD BY HAM RADIO
                                           SPOTTER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 10:54 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	51 min
Jun 28, 11:15 PM CDT	Severe Thunderstorm Warning	TSA	Wagoner	45 min
Jun 28, 11:47 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	43 min
Jun 29, 12:49 AM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers	41 min
Jun 29, 1:58 AM CDT	Severe Thunderstorm Warning	TSA	Rogers	62 min
Jun 29, 3:00 AM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	45 min
Jun 29, 3:22 AM CDT	Severe Thunderstorm Warning	TSA	Wagoner	53 min
Jun 29, 3:47 AM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	58 min
Jun 29, 4:15 AM CDT	Flash Flood Warning	TSA	Pushmataha	3 hr
Jun 29, 4:15 AM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Wagoner	60 min
Jun 29, 4:30 AM CDT	Severe Thunderstorm Warning	TSA	Rogers	45 min
Jun 29, 4:44 AM CDT	Flash Flood Warning	TSA	Rogers, Wagoner	3 hr
Jun 29, 6:12 AM CDT	Severe Thunderstorm Warning	TSA	Wagoner	48 min
Jun 29, 7:38 AM CDT	Flash Flood Warning	TSA	Rogers, Wagoner	112 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.