Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 11, NWS Tulsa, OK

January 3, 2000LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jan 3, 2000, 5:55 AM CST for LeFlore County, Oklahoma. It was in force for 35 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: Jan 3, 2000, 5:55 AM CST (11:55 UTC)
Expired: Jan 3, 2000, 6:30 AM CST
In force: 35 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), 77 km from the middle of the area, began a volume at 11:58 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
Jan 3, 6:15 AM CST	Thunderstorm Wind	Page, OK	Several large tree limbs blown down by thunderstorm winds.

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
Jan 2, 11:45 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 11.9 hours before the alert went out and 254 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: 473 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1063 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 341 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 031157
SVRTUL
OKC079-031230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
555 AM CST MON JAN 3 2000

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 630 AM CST

* AT 555 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF BIG CEDAR...MOVING
  NORTHEAST AT 55 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BIG CEDAR

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

LAT...LON 3460 9479 3452 9474 3462 9447 3486 9447

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 Jan 3, 4:10 AM CST, 1 hour 45 minutes earlier.

Area forecast discussion, Jan 3, 4:10 AM CST, 1 hour 45 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION...AMENDED
NATIONAL WEATHER SERVICE TULSA OK
410 AM CST MON JAN 3 2000

...ADDED TORNADO WATCH BANNER FOR AR ZONES...

VIGOROUS S/W RESPONSIBLE FOR SOME SVR CONVECTION THIS MORNING JUST
STARTING TO LIFT OUT AND MOVE NORTHEAST. SFC BOUNDARY DRAPED ACROSS
SRN OK EARLY THIS MORNING IS EXPECTED TO LIFT SOME AS THE SFC LOW
ASSOCIATED WITH THE UPPER WAVE MOVES NE. CONVECTION RAPIDLY MOVING
NORTHEAST.. AND THERE DOESNT APPEAR TO BE ANY ADDITIONAL DEVELOPMENT
DOWNSTREAM. WILL PROBABLY CONFINE POPS TO THIS MORNING ACROSS ALL
ZONES. MODELS OFFER VARYING SOLUTIONS WITH POSTIONING OF DRY SLOT
WHICH WILL LIKELY MAKE ITS PUNCH INTO SW ARKANSAS THIS AFTERNOON. LOW
RH'S WORK INTO SE OK THIS AFTERNOON...SO WILL GO PARTLY CLOUDY IN
ZONES SOUTH OF A MLC-FSM LINE. WRAP AROUND CLOUDS FILTER BACK IN FROM
THE NORTH THIS EVENING AND OVERNIGHT. MAIN SFC BOUNDARY WILL BE
MOVING ACROSS FA USHERING COLDER AIR. THICKNESS VALUES LOW ENOUGH TO
SUPPORT SNOW ACROSS ALL OF FA...THOUGH SFC WIND FIELDS TONIGHT ARE
NOT CONDUCIVE FOR ACCUMULATING SNOW. WILL GO WITH CHANCE OF LIGHT
SNOW NORTH OF I-40 WITH MENTION OF FLURRIES ELSEWHERE. UPPER TROUGH
AXIS SHIFTS EAST OF THE AREA BY AFTERNOON TUESDAY...LEAVING MOST
AREAS PARTLY CLOUDY. SFC RIDGE NEARLY CENTERED ON TOP OF REGION
TUESDAY NIGHT SHOULD MAKE FOR IDEAL RADIATIONAL COOLING.

1ST PERIOD TEMPS A REAL MESS WITH LOCATION OF SFC BOUNDARY AND PRECIP
CREATING A WIDE RANGE OF TEMPERATURES THIS MORNING. WILL BASE 1ST
PERIOD ON SFC BOUNDARY POSTIONING AND RADAR TRENDS. BEYOND 1ST
PD...STUCK PRETTY CLOSE TO GUIDANCE ON MAX TEMPS BUT UNDERCUT MINS
SLIGHTLY.

NOT MUCH TIME TO DIVE INTO THE EXTENDED. SETTLED WX EXPECTED THROUGH
WED. QUICK PEEK AT MRF HAS BOUNDARY APPROACHING FA THURSDAY WITH THE
BRUNT OF UPPER SUPPORT STAYING TO THE NORTH. CURRENT EXTENDED LOOKS
REASONABLE AND WILL LEAVE AS IS.

FCSTID = 23

PRELIMINARY NUMBERS

TUL   50  25  41  23 /  60  40  20   0
FSM   60  29  41  23 /  70  30  20   0
MLC   64  28  42  24 /  40  30  10   0
BVO   48  22  38  20 /  40  40  10   0
FYV   50  27  35  19 /  70  40  20   0
BYV   50  27  35  19 /  70  40  20   0
MIO   46  22  38  20 /  40  40  10   0
MKO   50  25  34  23 /  60  40  20   0
F10   50  25  34  23 /  60  40  20   0
HHW   65  30  44  24 /  30  20   5   0

.TUL...
SEVERE THUNDERSTORM QWATCH UNTIL 600 AM CST MONDAY FOR ZONES OKZ049...
OKZ053...OKZ073>076.

.AR...
TORNADO WATCH FROM UNTIL 1000 AM CST MONDAY FOR ZONES
ARZ002...ARZ010>011...ARZ019>020...ARZ029.

In the hours before

Special weather statement, Jan 3, 5:07 AM CST, 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
507 AM CST MON JAN 3 2000

OKZ073>075-031200-
A SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR THE FOLLOWING
COUNTIES IN

EASTERN OKLAHOMA.
         HASKELL             LATIMER             PITTSBURG

OKZ049-053-076-031200-
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM CST MONDAY
FOR THE FOLLOWING COUNTIES IN

EASTERN OKLAHOMA...
         CHOCTAW             LE FLORE            PUSHMATAHA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 2, 11:07 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	38 min
Jan 3, 1:09 AM CST	Severe Thunderstorm Warning	TSA	Muskogee	36 min
Jan 3, 3:14 AM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	46 min
Jan 3, 3:36 AM CST	Severe Thunderstorm Warning	TSA	Sequoyah	54 min
Jan 3, 4:05 AM CST	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	50 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2000 Every severe thunderstorm warning in 2000

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.