Alert archive / Oklahoma / Flood Watches in 2008

Flood Watch 4, NWS Tulsa, OK

September 11, 200822 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this flood watch at Sep 11, 2008, 3:47 PM CDT for 22 counties in Oklahoma; 4 counties in Arkansas. It took effect at Sep 13, 2008, 7:00 PM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Sep 11, 2008, 3:47 PM CDT (20:47 UTC)
In effect from: Sep 13, 2008, 7:00 PM CDT
Expired: Sep 14, 2008, 5:51 AM CDT
In force: 11 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 20:51 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 12:00Z, 8.8 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: 336 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this 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 flood watch went out at Sep 11, 2:54 PM CDT, 53 minutes earlier.

Area forecast discussion, Sep 11, 2:54 PM CDT, 53 minutes before

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Hazardous weather outlook, Sep 11, 1:00 PM CDT, 2 hours 47 minutes before

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Nearby

Flood Watches in Oklahoma, 2008 Flood Watches in Arkansas, 2008 Every flood watch in 2008

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.