Alert archive / Oklahoma / Winter Storm Watches in 2009

Winter Storm Watch 4, NWS Tulsa, OK

December 23, 200922 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this winter storm watch at Dec 23, 2009, 4:04 AM CST for 22 counties in Oklahoma; 4 counties in Arkansas. It took effect at Dec 24, 2009, 6:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 23, 2009, 4:04 AM CST (10:04 UTC)
In effect from
Dec 24, 2009, 6:00 AM CST
Expired
Dec 24, 2009, 3:55 AM CST
In force
Issued by
NWS Tulsa, OK
All 26 counties

Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Choctaw County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pawnee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 42 km from the middle of the area, began a volume at 10:03 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 10.1 hours before the alert went out and 176 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2009-12-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2009-12-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 203 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
694 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
203 m²/s²
0-3 km storm-relative helicity
298 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm watch 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 winter storm watch went out at Dec 23, 3:20 AM CST, 44 minutes earlier.

Area forecast discussion, Dec 23, 3:20 AM CST, 44 minutes before
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Hazardous weather outlook, Dec 22, 5:00 PM CST, 11 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
500 PM CST TUE DEC 22 2009

ARZ001-002-010-011-019-020-029-OKZ049-053>076-231100-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
500 PM CST TUE DEC 22 2009

...STRONG STORM SYSTEM WILL AFFECT THE AREA TONIGHT THROUGH
CHRISTMAS...

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...SOUTHEAST OF I-44.
	ONSET...AFTER 10 PM.

DISCUSSION...
SHOWERS AND THUNDERSTORMS WILL DEVELOP LATER THIS EVENING AND
INCREASE THROUGH THE EARLY MORNING HOURS. A FEW STRONG TO SEVERE
ELEVATED THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL WILL BE
POSSIBLE AS THE LOW LEVEL JET STRENGTHENS AND MOISTURE CONTINUES
TO INCREASE THROUGH THE OVERNIGHT HOURS.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
LOCAL SPOTTER ACTIVATION MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
WEDNESDAY...SEVERE THUNDERSTORM POTENTIAL...HEAVY RAIN POTENTIAL.
THURSDAY...WINTER WEATHER POTENTIAL...HIGH WIND POTENTIAL.
CHRISTMAS DAY...HIGH WIND POTENTIAL.
SATURDAY THROUGH MONDAY...NO HAZARDS.

EXTENDED DISCUSSION...
THE FORECAST FOR A STRONG STORM SYSTEM TO IMPACT THE AREA
WEDNESDAY THROUGH FRIDAY CONTINUES. THUNDERSTORMS WILL BE ONGOING
EARLY WEDNESDAY MORNING...BEFORE SHIFTING FURTHER EAST BY
EARLY AFTERNOON. ADDITIONAL THUNDERSTORMS ARE LIKELY TO FORM BY
WEDNESDAY AFTERNOON ALONG AN ADVANCING COLD FRONT...WITH THESE
STORMS IMPACTING ALL OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS
THROUGH THE EVENING HOURS. INCREASING SURFACE BASED INSTABILITY
ACROSS SOUTHEAST OKLAHOMA INDICATES THE THREAT OF ALL MODES OF
SEVERE WEATHER WILL BE POSSIBLE SOUTH OF I-40...INCLUDING THE CHANCE
FOR A TORNADO. LARGE HAIL AND DAMAGING WINDS REMAIN THE
PRIMARY IMPACT TO THE NORTH WHERE STORMS SHOULD REMAIN MORE
ELEVATED. HEAVY RAINFALL ALSO APPEARS LIKELY ESPECIALLY OVER FAR
EASTERN OKLAHOMA AND NORTHWEST ARKANSAS BEFORE THIS ROUND OF
STORMS MOVES EAST OF THE FORECAST AREA BY LATE WEDNESDAY NIGHT.

THE ATTENTION WILL THEN FOCUS ON THE MUCH COLDER TEMPERATURES
FOLLOWING THE COLD FRONT...AND THE POTENTIAL FOR SNOW DEVELOPING
OVER PARTS OF THE AREA BY THURSDAY AFTERNOON. AT THIS TIME...
FORECAST MODELS INDICATE A SECONDARY UPPER LEVEL SYSTEM WILL LIFT
NORTH ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THURSDAY
AFTERNOON WITH INCREASING PRECIPITATION. BY THIS TIME THE AIRMASS
WILL LIKELY BE COLD ENOUGH FOR A TRANSITION TO SNOW. THE BEST
CHANCE OF ACCUMULATING SNOWFALL APPEARS TO BE FOCUSED ON NORTHEAST
OKLAHOMA AND MUCH OF NORTHWEST ARKANSAS...THOUGH THERE IS A CHANCE
FOR SNOW ACROSS THE ENTIRE AREA. WHILE ACCUMULATIONS AS THIS TIME
APPEAR TO LIGHT...NARROW BANDS OF HEAVIER SNOWFALL COULD BE
POSSIBLE. THE TRACK OF THE STORM SYSTEM ACROSS THE AREA WILL HAVE
A LARGE IMPACT ON THE SNOWFALL POTENTIAL...AND LATER FORECASTS
WILL CONTINUALLY UPDATE SNOW AMOUNTS AND PLACEMENT.

STRONG NORTHWESTERLY WINDS WILL DEVELOP ON THURSDAY AND PERSIST
INTO SATURDAY AS THE STRONG STORM MOVES SLOWLY NORTHWARD INTO THE
UPPER MIDWEST.  THIS COULD RESULT IN DANGEROUS WIND CHILLS EARLY
CHRISTMAS MORNING.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
SEVERE WEATHER OPERATIONS SHOULD BE ANTICIPATED WEDNESDAY...
AND CONSIDER POSSIBLE TRAVEL IMPACTS FOR THURSDAY INTO FRIDAY.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Dec 23, 3:11 AM CST, 53 minutes before
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Special weather statement, Dec 23, 3:48 AM CST, 16 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 22, 8:04 PM CSTFlash Flood WatchTSAAdair, Choctaw, Haskell, Latimer, Pushmataha34 hr
Dec 23, 3:11 AM CSTSpecial Weather StatementTSACreek49 min
Dec 23, 3:48 AM CSTSpecial Weather StatementTSATulsa42 min
Dec 23, 10:29 AM CSTSpecial Weather StatementTSAMayes31 min
Dec 23, 1:02 PM CSTSpecial Weather StatementTSACreek28 min
Dec 23, 2:08 PM CSTSpecial Weather StatementTSAPittsburg52 min
Dec 23, 2:31 PM CSTSevere Thunderstorm WarningTSAPittsburg33 min
Dec 23, 2:42 PM CSTSpecial Weather StatementTSAMcIntosh33 min
Dec 23, 2:44 PM CSTSpecial Weather StatementTSANowata31 min
Dec 23, 3:05 PM CSTSpecial Weather StatementTSAPittsburg25 min
Dec 23, 3:27 PM CSTSpecial Weather StatementTSACraig33 min
Dec 23, 3:28 PM CSTSpecial Weather StatementTSAHaskell47 min
Dec 23, 3:41 PM CSTSpecial Weather StatementTSANowata, Rogers49 min
Dec 23, 3:44 PM CSTSpecial Weather StatementTSARogers46 min
Dec 23, 3:55 PM CSTWinter Storm WarningTSAAdair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more36 hr
Dec 23, 4:24 PM CSTSpecial Weather StatementTSACraig36 min

Nearby

Winter Storm Watches in Oklahoma, 2009Winter Storm Watches in Arkansas, 2009Every winter storm watch in 2009

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.