Alert archive / Oklahoma / Flash Flood Watches in 2007

Flash Flood Watch 18, NWS Tulsa, OK

October 2, 20075 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this flash flood watch at Oct 2, 2007, 8:57 PM CDT for 5 counties in Oklahoma; 4 counties in Arkansas. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Oct 2, 2007, 8:57 PM CDT (01:57 UTC)
Expired: Oct 3, 2007, 3:51 AM CDT
In force: 7 hr
Issued by: NWS Tulsa, OK
Flood severity: None

Counties Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Delaware County, OK, Muskogee County, OK, Wagoner County, OK

The radar

The Western Arkansas radar (KSRX), 86 km from the middle of the area, began a volume at 02:00 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

Norman, OK (KOUN), launched 00:00Z, 2.0 hours before the alert went out and 272 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: 1431 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1527 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.1

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 Oct 2, 5:42 PM CDT, 3 hours 15 minutes earlier.

Area forecast discussion, Oct 2, 5:42 PM CDT, 3 hours 15 minutes before

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Hazardous weather outlook, Oct 2, 4:26 PM CDT, 4 hours 31 minutes before

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In the hours before

Special weather statement, Oct 2, 3:51 PM CDT, 5 hours 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
351 PM CDT TUE OCT 2 2007

OKZ054-059-022145-
OSAGE OK-PAWNEE OK-
351 PM CDT TUE OCT 2 2007

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 445 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     OSAGE AND PAWNEE

AT 351 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 6 MILES NORTHEAST OF OKESA TO 16 MILES WEST OF
PAWNEE...MOVING EAST AT 30 MPH. A LARGE PORTION OF SOUTHERN AND EASTERN
OSAGE AND PAWNEE COUNTIES WILL BE AFFECTED BY THESE STORMS THROUGH
445 PM CDT.

THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS
TO 50 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE
SIGNIFICANT WEATHER ALERT IS UPGRADED TO A WARNING.

LAT...LON 3699 9601 3656 9600 3620 9650 3629 9694
      3632 9694 3635 9705 3646 9706 3655 9700
      3658 9691 3659 9698 3669 9691
TIME...MOT...LOC 2051Z 269DEG 27KT 3677 9603 3634 9706

Special weather statement, Oct 2, 4:47 PM CDT, 4 hours 10 minutes before

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Special weather statement, Oct 2, 4:59 PM CDT, 3 hours 58 minutes before

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Special weather statement, Oct 2, 5:57 PM CDT, 3 hours before

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Special weather statement, Oct 2, 6:58 PM CDT, 1 hour 59 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
Oct 2, 7:55 PM CDT	Special Weather Statement	TSA	Adair, Cherokee, Creek, Delaware, McIntosh, Mayes and 5 more	65 min
Oct 2, 8:56 PM CDT	Special Weather Statement	TSA	Adair, Cherokee, Muskogee	64 min
Oct 2, 9:51 PM CDT	Special Weather Statement	TSA	Adair, Muskogee, Sequoyah	54 min
Oct 2, 10:32 PM CDT	Special Weather Statement	TSA	Sequoyah	43 min
Oct 2, 11:09 PM CDT	Special Weather Statement	TSA	Haskell, Sequoyah	66 min
Oct 3, 4:07 AM CDT	Flash Flood Warning	TSA	LeFlore, Sequoyah	3 hr
Oct 3, 4:51 AM CDT	Flash Flood Warning	TSA	Franklin, Sebastian	114 min

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.