Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 31, NWS Tulsa, OK

February 6, 1999LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 6, 1999, 7:55 PM CST for LeFlore County, Oklahoma. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 6, 1999, 7:55 PM CST (01:55 UTC)
Expired: Feb 6, 1999, 9:00 PM CST
In force: 65 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 53 km from the middle of the area, began a volume at 01:59 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 6, 3:00 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.9 hours before the alert went out and 237 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: 19 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 498 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Feb 6, 3:15 PM CST, 4 hours 40 minutes earlier.

Area forecast discussion, Feb 6, 3:15 PM CST, 4 hours 40 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
315 PM CST SAT FEB 6 1999

PROBLEM(S) OF THE DAY:
WILL THERE BE SEVERE CONVECTION?
WHAT TYPE(S) OF SEVERE WEATHER WILL OCCUR?

POTENT SHORT WAVE MOVING ACROSS NM THIS AFTERNOON TOWARD WEST TX WILL
MOVE ON RATHER QUICKLY ACROSS THE AREA OVER THE NEXT 12-18 HRS.
DEVELOPING SURFACE LOW WAS LOCATED NEAR SPS ALONG THE RED RIVER AT
21Z WITH SURFACE BOUNDARY ORIENTED SW-NE STRETCHING ACROSS THE AREA.
LATEST RUC DOING A FAIRLY GOOD JOB WITH THE DEVELOPING LOW AND MOVES
THE LOW ACROSS THE STATE...TO NEAR SEMINOLE AT 00Z...NEAR MIAMI AT
03Z...THEN ON INTO SOUTHWEST MO BY MIDNIGHT.  SEVERE THUNDERSTORM
WATCH JUST ISSUED TILL 9 PM THIS EVENING FOR AREAS ROUGHLY ALONG AND
SOUTH OF I-44.

MODELS IN FAIRLY GOOD AGREEMENT IN MOVING UPPER SYSTEM ACROSS WEST TX
AND INTO EASTERN OK BY MIDNIGHT...THEN ON TO THE EAST AND NORTHEAST
OF THE AREA BY 12Z.  WILL ALSO HAVE TO WATCH FOR THE POTENTIAL FOR
HEAVY RAIN THIS EVENING...BUT WILL NOT ISSUE FFA AT THIS TIME WITH
STORMS EXPECTED TO REMAIN ON THE MOVE.  SOME POTENTIAL FOR TRAINING
ALONG SW-NE SURFACE BOUNDARY IF IT REMAINS ORIENTED AS IT IS TOO
LONG...SO WILL NEED TO WATCH FOR THIS CLOSELY.

PRECIP IS EXPECTED TO CUT OFF QUICKLY AND MOVE TO THE EAST AND
NORTHEAST OF THE AREA BY MORNING.  SHOULD BE A PLEASANT DAY ON SUNDAY
WITH GOOD SUBSIDENCE BEHIND SYSTEM WITH NICE WEATHER EXTENDING INTO
MONDAY AND TUESDAY.  TEMPS WELL ABOVE NORMAL.

NEXT CHANCE OF RAIN STILL LOOKS TO BE WEDNESDAY INTO EARLY THURSDAY.

FCSTID = 4
TUL   46  62  44  70 /  90  10   0   0
FSM   47  63  39  70 /  90  10   0   0
MLC   47  64  42  70 /  90  10   0   0
BVO   42  62  40  70 /  80  10   0   0
FYV   48  60  38  67 /  90  10   0   0
IDB   50  65  39  72 /  90  10   0   0
BYV   47  60  37  67 /  90  10   0   0
MIO   45  61  40  68 /  90  10   0   0
MKO   46  62  44  70 /  90  10   0   0
F10   46  62  43  70 /  90  10   0   0
HHW   50  65  40  72 /  90  10   0   0

.TUL...
OK...NONE.
AR...NONE.

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

HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: CHANCE SEVERE THUNDERSTORMS
NGM CONFIDENCE:  6 ON A SCALE OF 0 TO 10
ETA CONFIDENCE:  7 ON A SCALE OF 0 TO 10
AVN CONFIDENCE:  6 ON A SCALE OF 0 TO 10
FCST CONFIDENCE: 7 ON A SCALE OF 0 TO 10

In the hours before

Special weather statement, Feb 6, 6:30 PM CST, 1 hour 25 minutes before

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Local storm report, Feb 6, 7:50 PM CST, 5 minutes before

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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Feb 6, 7:55 PM CST, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
755 PM CST SAT FEB 06 1999

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

0710 PM    WILBURTON                 OK   WIND DAMAGE
02/06/99   LATIMER                        MANY POWER LINES REPORTED
                                          DOWN...SEVERAL TREES
                                          UPROOTED

0710 PM    5 S WILBURTON             OK   WIND DAMAGE
02/06/99   LATIMER                        SEVERAL HOUSES DAMAGED BY
                                          WIND

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 6, 6:13 PM CST	Severe Thunderstorm Warning	TSA	Pittsburg	62 min
Feb 6, 7:18 PM CST	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	42 min
Feb 6, 7:55 PM CST	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	65 min
Feb 6, 10:56 PM CST	Severe Thunderstorm Warning	TSA	Osage, Pawnee	49 min
Feb 6, 11:42 PM CST	Severe Thunderstorm Warning	TSA	Osage, Pawnee	63 min
Feb 6, 7:32 PM CST	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	58 min
Feb 6, 8:07 PM CST	Severe Thunderstorm Warning	TSA	Franklin	53 min
Feb 6, 8:18 PM CST	Flash Flood Warning	TSA	Benton	87 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.