Alert archive / Oklahoma / Flash Flood Watches in 2007

Flash Flood Watch 17, NWS Tulsa, OK

September 7, 200722 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this flash flood watch at Sep 7, 2007, 3:24 AM CDT for 22 counties in Oklahoma; 4 counties in Arkansas. It took effect at Sep 7, 2007, 7:00 AM CDT. It was in force for 54 hr.

The area

The counties it named.

The facts

Issued: Sep 7, 2007, 3:24 AM CDT (08:24 UTC)
In effect from: Sep 7, 2007, 7:00 AM CDT
Expired: Sep 9, 2007, 1:00 PM CDT
In force: 54 hr
Issued by: NWS Tulsa, OK
Flood severity: None

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 08:27 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, 8.4 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-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: 1095 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1278 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood watch went out at Sep 7, 3:05 AM CDT, 19 minutes earlier.

Area forecast discussion, Sep 7, 3:05 AM CDT, 19 minutes before

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Hazardous weather outlook, Sep 6, 4:53 AM CDT, 22 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
453 AM CDT THU SEP 6 2007

ARZ001-002-010-011-019-020-029-OKZ049-053>076-071000-
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-
453 AM CDT THU SEP 6 2007

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

.DAY ONE...TODAY AND TONIGHT.
SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA AND THE NORTHWEST CORNER
               OF ARKANSAS.
	ONSET...ONGOING AND THEN AGAIN LATE TONIGHT.

DISCUSSION...
THE UPPER LOW WHICH PRODUCED RAIN ACROSS THE AREA YESTERDAY
WAS STILL BRINGING A FEW THUNDERTORMS TO THE NORTHEAST CORNER
OF THE FORECAST AREA THIS MORNING.  A STRONG STORM OR TWO WILL
REMAIN POSSIBLE.  ADDTIONAL STORMS WERE OCCURRING OVER CENTRAL
AND WESTERN OKLAHOMA.  A FEW OF THESE STORMS MAY TRY TO MOVE
INTO THE AREA THIS MORNING BEFORE THEY DISSIPATE WITH THE
WEAKENING OF THE LOW LEVEL JET.

MORE STORMS WILL BE POSSIBLE LATER TONIGHT AS AN UPPER
TROUGH AND ITS ASSOCIATED COLD FRONT MOVE EAST OF THE
ROCKIES AND INTO THE PLAINS.  A SEVERE WEATHER EVENT IS
EXPECTED OVER THE CENTRAL PLAINS THIS AFTERNOON AND
EVENING.  A FEW OF THESE STORMS MAY TRY TO MOVE INTO
NORTHEAST OKLAHOMA LATE TONIGHT.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
SPOTTER ACTIVATION NOT EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
FRIDAY...THUNDERSTORM POTENTIAL...HEAVY RAIN POTENTIAL.
SATURDAY...THUNDERSTORM POTENTIAL.
SUNDAY...THUNDERSTORM POTENTIAL.
MONDAY...THUNDERSTORM POTENTIAL.
TUESDAY...NO HAZARDS.
WEDNESDAY...NO HAZARDS.

EXTENDED DISCUSSION...
THE AFOREMENTIONED UPPER TROUGH AND COLD FRONT WILL MAKE
PROGRESS EASTWARD AND SOUTHEASTWARD RESPECTIVELY FRIDAY.
THUNDERSTORM CHANCES WILL INCREASE AGAIN.  THE COMBINATION
OF THE FRONT SLOWING DOWN AS IT MOVES INTO OUR AREA AND
ABUNDANT MOISTURE LEFT BEHIND THE PREVIOUS SYSTEM WILL
LIKELY RESULT IN HEAVY RAIN ACROSS PARTS OF THE AREA.

THE FRONT WILL STUGGLE TO MAKE FURTHER SOUTH THAN EASTERN
OKLAHOMA AND NORTHWEST ARKANSAS SO THUNDERSTORM CHANCES
WILL CONTINUE INTO THE WEEKEND.  A MORE PROGRESSIVE FRONT
WILL MOVE ACROSS THE AREA SUNDAY AND MONDAY ENHANCING
RAIN CHANCES IN THAT TIME FRAME.

HIGH PRESSURE WILL BRING SUNSHINE AND PLEASANT TEMPERATURES
TO THE AREA DURING THE MIDDLE OF THE UPCOMING WEEK.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
EMERGENCY MANAGERS SHOULD BE PREPARED FOR HEAVY RAINS FROM
FRIDAY INTO SATURDAY.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL TABULAR AND GRAPHICAL
INFORMATION.

Nearby

Flash Flood Watches in Oklahoma, 2007 Flash Flood Watches in Arkansas, 2007 Every flash flood watch in 2007

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.