Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 352, NWS Tulsa, OK

June 1, 1999Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 1, 1999, 7:12 PM CDT for Pittsburg County, Oklahoma. It was in force for 48 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 1, 1999, 7:12 PM CDT (00:12 UTC)
Expired: Jun 1, 1999, 8:00 PM CDT
In force: 48 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Pittsburg County, OK

What was reported inside it

Time	Report	Where	Remark
Jun 1, 7:22 PM CDT	Tornado F0	Canadian, OK	Spotters reported a brief tornado touchdown in open country.
Jun 1, 7:30 PM CDT	Tornado F0	Canadian, OK	Spotters reported a brief tornado touchdown in open country.

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
Jun 1, 5:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.2 hours before the alert went out and 154 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: 2445 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1590 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

746 
WUUS54 KTSA 020015 RRA
SVRTUL
OKC121-020100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
712 PM CDT TUE JUN 1 1999

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 800 PM CDT

* AT 712 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHWEST OF CANADIAN...MOVING SOUTHEAST AT
  20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...CANADIAN...
INDIANOLA...CROWDER...BLOCKER AND SCIPIO

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

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

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 1, 3:50 PM CDT, 3 hours 22 minutes earlier.

Area forecast discussion, Jun 1, 3:50 PM CDT, 3 hours 22 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
350 PM CDT TUE JUN 1 1999

PROBLEM(S) OF THE DAY:
WILL STORMS BE SUPERCELLS OR NOT?
POPS

RADAR IS NOW SHOWING CONVECTIVE INITIATION ALONG THE FRONT NEAR I-44
IN NE OK. TSRA SHOULD CONTINUE DEVELOPING SOUTHWEST ALONG THE FRONT
DURING NEXT HOUR OR TWO. WITH SUCH AN EXTREMELY UNSTABLE
ATMOSPHERE...TORNADOES ARE A POSSIBILITY WITH ANY STORM THAT
FORMS...THOUGH MORE FAVORABLE BACKED WINDS ARE IN SE OK. TEMPS IN SE
OK HAVE REACHED THE LOW 90S...SO CONVECTIVE TEMP IS NEAR AND THE CAP
SHOULD BREAK SOON. SPC HAS CALLED TO SAY THEY ARE CONSIDERING TORNADO
WATCH THERE IN NEXT HOUR OR SO. LOOKS LIKE AN ACTIVE EVENING. THE
LOGIC LAID OUT IN THE LATE MORNING DISCUSSION STILL LOOKS GOOD...SO
REFER TO THAT DISC FOR MORE SEVERE WEATHER LOGIC.

THE FRONT WILL CONTINUE TO SAG SOUTH TONIGHT TO NEAR THE RED RIVER.
AS THE FRONT SLOWS DOWN LATE TONIGHT...SOME TRAINING TSRA MAY TAKE
PLACE IN FAR SE OK.  3-HOUR FLASH FLOOD GUIDANCE VALUES DOWN THAT WAY
ARE OVER 2 INCHES...SO WILL HOLD OFF ON FLASH FLOOD WATCH FOR NOW.
EVENING SHIFT MAY WANT TO MONITOR.

AN UNSTABLE ATMOSPHERE WILL PERSIST ON WED AS THE FRONT LINGERS
AROUND THE RED RIVER. WILL INCLUDE POPS EVERYWHERE TMRW WITH THE
HIGHER POPS IN THE SOUTH WITH BETTER MOISTURE AND CONVERGENCE.

BIG UPPER TROF WILL DIG INTO THE WRN STATES AND BRING THE AREA INTO
SOUTHWEST FLOW STARTING LATE WED NGT. SHORTWAVES BEING EJECTED FROM
THE WESTERN TROF WILL LEAVE A CHANCE OF SHRA/TSRA IN THE FCST EACH
DAY FROM THU THRU SUN. THE ETA SHOWS AN MCS MOVING FROM WRN OK THRU
KS ON WED NGT. WILL HAVE HIGHER POPS IN NRN AND WRN ZNS ON WED NGT IN
CASE THE MCS ROUNDS THE TOP OF THE UPPER RIDGE AND HEADS SE INTO THE
FCST AREA. RAIN CHANCES ON SUN LOOK LIKE THE HIGHEST IN THE EXTENDED
FORECAST AS THE WEAKENING UPPER LOW FINALLY MOVES EAST OUT OF THE
SOUTHERN ROCKIES.

FCSTID = 22
TUL   65  86  69  83 /  10  20  40  30
FSM   67  88  67  88 /  40  30  20  30
MLC   65  88  70  86 /  40  30  30  30
BVO   62  86  66  82 /   5  20  50  30
FYV   60  84  62  84 /  40  20  30  30
IDB   69  87  68  88 /  40  40  20  30
BYV   60  85  62  85 /  40  20  30  30
MIO   62  85  63  83 /  30  20  30  30
MKO   65  87  68  85 /  30  30  30  30
F10   65  87  69  85 /  30  20  40  30
HHW   69  87  68  88 /  40  40  20  30

.TUL...
AR...TORNADO WATCH FROM 345 PM CDT TuesdAy UNTIL 1000 PM CDT TuesdAy
FOR ZONES ARZ001>002...ARZ010>011...ARZ019>020...ARZ029.

OK...TORNADO WATCH FROM 345 PM CDT TuesdAy UNTIL 1000 PM CDT TuesdAy
FOR ZONES OKZ057>058...OKZ061>063...OKZ065>072...OKZ074.

--------------------
EXPERIMENTAL OUTPUT:

HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: GOOD CHANCE SUPERCELL
THUNDERSTORMS
NGM CONFIDENCE:  7 ON A SCALE OF 0 TO 10
ETA CONFIDENCE:  8 ON A SCALE OF 0 TO 10
AVN CONFIDENCE:  8 ON A SCALE OF 0 TO 10
FCST CONFIDENCE: 8 ON A SCALE OF 0 TO 10

In the hours before

Local storm report, Jun 1, 6:19 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
619 PM CDT TUE JUN 01 1999

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

0618 PM    1 NE MUSKOGEE             OK    TORNADO
06/01/99   MUSKOGEE                        TORNADO REPORTED ON THE
                                           ARKANSAS RIVER NEAR THE
                                           OG&E POWER PLANT.

Local storm report, Jun 1, 6:19 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
619 PM CDT TUE JUN 01 1999

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

0618 PM    1 NE MUSKOGEE             OK    TORNADO
06/01/99   MUSKOGEE                        TORNADO REPORTED ON THE
                                           ARKANSAS RIVER NEAR THE
                                           OG&E POWER PLANT.

Local storm report, Jun 1, 6:47 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
647 PM CDT TUE JUN 01 1999

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

0646 PM    CHECOTAH                  OK    TORNADO
06/01/99   MCINTOSH

Local storm report, Jun 1, 6:47 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
647 PM CDT TUE JUN 01 1999

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

0646 PM    CHECOTAH                  OK    TORNADO
06/01/99   MCINTOSH

Local storm report, Jun 1, 6:58 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
658 PM CDT TUE JUN 01 1999

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

0650 PM    3 S BRAGGS                OK    1.75 INCH HAIL
06/01/99   MUSKOGEE

0657 PM    ONAPA                     OK    TORNADO
06/01/99   MCINTOSH

Local storm report, Jun 1, 6:58 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
658 PM CDT TUE JUN 01 1999

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

0650 PM    3 S BRAGGS                OK    1.75 INCH HAIL
06/01/99   MUSKOGEE

0657 PM    ONAPA                     OK    TORNADO
06/01/99   MCINTOSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 7:04 PM CDT	Tornado Warning	TSA	Haskell, McIntosh, Muskogee	41 min
Jun 1, 7:21 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	39 min
Jun 1, 7:27 PM CDT	Tornado Warning	TSA	Pittsburg	33 min
Jun 1, 7:40 PM CDT	Tornado Warning	TSA	Haskell, McIntosh, Muskogee	50 min
Jun 1, 7:47 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	58 min
Jun 1, 7:47 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	58 min
Jun 1, 8:26 PM CDT	Tornado Warning	TSA	Haskell, Latimer, Pittsburg	49 min
Jun 1, 8:41 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	49 min
Jun 1, 8:44 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	46 min
Jun 1, 9:16 PM CDT	Tornado Warning	TSA	Latimer	29 min
Jun 1, 9:26 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	49 min
Jun 1, 9:31 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	44 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1999 Every severe thunderstorm warning in 1999

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.