Alert archive / Arkansas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 569, NWS Tulsa, OK

December 3, 1999Crawford County, Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Dec 3, 1999, 1:06 AM CST for Crawford County, Sebastian County, Arkansas. It was in force for 54 min. 5 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: Dec 3, 1999, 1:06 AM CST (07:06 UTC)
Expired: Dec 3, 1999, 2:00 AM CST
In force: 54 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Crawford County, AR, Sebastian County, AR

What was reported inside it

Time	Report	Where	Remark
Dec 3, 1:18 AM CST	Thunderstorm Wind 52	Ft Smith, AR
Dec 3, 1:20 AM CST	Hail 0.88	Ft Smith, AR
Dec 3, 1:22 AM CST	Tornado F1	Ft Smith, AR	A gustnado occurred at 122 am near Phoenix and 46th street in Fort Smith and was on the ground for approximately 20 seconds. 3 warehouses and 2 office buildings were heavily damaged. A motor home,construction trailer and cessna airplane were also destroyed.
Dec 3, 1:27 AM CST	Thunderstorm Wind	Ft Smith, AR	Thunderstorm winds blew down numerous power poles.
Dec 3, 1:40 AM CST	Thunderstorm Wind	Mulberry, AR	Thunderstorms winds blew several trees down, 9 power poles down, and the roof off a barn near Mulberry.

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
Dec 2, 10:00 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 7.1 hours before the alert went out and 320 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: 1310 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.3

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 Dec 2, 8:17 PM CST, 4 hours 49 minutes earlier.

Area forecast discussion, Dec 2, 8:17 PM CST, 4 hours 49 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
817 PM CST THU DEC 2 1999

UPDATED ZONES HAVE ALREADY BEEN SENT. THE UPDATE REFLECTS NEW SEVERE
THUNDERSTORM WATCH AND ALSO DELAYED ENDING OF THUNDERSTORMS UNTIL
EARLY FRIDAY MORNING MOST ZONES.

LARGE SQUALL LINE HAS DEVELOPED ACROSS CENTRAL OKLAHOMA THIS EVENING
AND WAS MOVING INTO WESTERN PART OF COUNTY WARNING AREA AT THIS
TIME.  MAIN THREAT OVERNIGHT WILL BE DAMAGING WIND GUSTS...ALTHOUGH
WE WILL HAVE TO WATCH CLOSELY FOR SUPERCELLS IN ANY STORMS AHEAD OF
THE LINE SINCE LOW LEVEL WINDS HAVE BACKED AND SHEAR REMAINS
STRONG.

NO CHANGES WERE MADE TO LATER PERIODS OF FORECAST.

FCSTID = 9

.TUL...
AR...NONE.
OK...SEVERE THUNDERSTORM WATCH UNTIL 1000 PM THIS EVENING FOR ZONES
OKZ049...OKZ053...OKZ060...OKZ064>067...OKZ070>071...OKZ073>075.

SEVERE THUNDERSTORM WATCH UNTIL 100 AM CST FRIDAY FOR ZONES
OKZ054>063.

In the hours before

Local storm report, Dec 2, 11:06 PM CST, 2 hours before

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Local storm report, Dec 2, 11:14 PM CST, 1 hour 52 minutes before

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Local storm report, Dec 2, 11:48 PM CST, 1 hour 18 minutes before

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Local storm report, Dec 3, 12:07 AM CST, 59 minutes before

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Local storm report, Dec 3, 12:09 AM CST, 57 minutes before

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Special weather statement, Dec 3, 12:20 AM CST, 46 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 2, 8:07 PM CST	Severe Thunderstorm Warning	TSA	Osage, Pawnee	53 min
Dec 2, 8:45 PM CST	Severe Thunderstorm Warning	TSA	Osage, Pawnee	60 min
Dec 2, 9:04 PM CST	Severe Thunderstorm Warning	TSA	Creek, Tulsa	56 min
Dec 2, 9:20 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Tulsa, Washington	40 min
Dec 2, 9:25 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Washington	50 min
Dec 2, 9:25 PM CST	Severe Thunderstorm Warning	TSA	Tulsa	50 min
Dec 2, 9:43 PM CST	Severe Thunderstorm Warning	TSA	Creek, Osage	32 min
Dec 2, 10:11 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Tulsa	64 min
Dec 2, 10:11 PM CST	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	64 min
Dec 2, 10:48 PM CST	Severe Thunderstorm Warning	TSA	Delaware	42 min
Dec 2, 11:21 PM CST	Severe Thunderstorm Warning	TSA	Mayes, Muskogee, Wagoner	39 min
Dec 2, 11:58 PM CST	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	62 min
Dec 3, 12:22 AM CST	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	68 min
Dec 3, 12:54 AM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	51 min
Dec 2, 11:51 PM CST	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison	39 min
Dec 3, 12:25 AM CST	Severe Thunderstorm Warning	TSA	Madison	50 min
Dec 3, 12:38 AM CST	Severe Thunderstorm Warning	TSA	Carroll	52 min
Dec 3, 1:31 AM CST	Severe Thunderstorm Warning	TSA	Franklin	59 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 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.