Alert archive / Oklahoma / Flash Flood Watches in 2009

Flash Flood Watch 7, NWS Tulsa, OK

May 13, 200922 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this flash flood watch at May 13, 2009, 10:15 AM CDT for 22 counties in Oklahoma; 4 counties in Arkansas. It took effect at May 13, 2009, 7:00 PM CDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: May 13, 2009, 10:15 AM CDT (15:15 UTC)
In effect from: May 13, 2009, 7:00 PM CDT
Expired: May 14, 2009, 7:00 AM CDT
In force: 12 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 15:19 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

Lamont, OK (KLMN), launched 12:00Z, 3.3 hours before the alert went out and 214 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: 701 J/kg
Mixed-layer CIN: -565 J/kg
Mixed-layer LCL: 1492 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 329 m²/s²
0-3 km storm-relative helicity: 587 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 May 13, 6:25 AM CDT, 3 hours 50 minutes earlier.

Area forecast discussion, May 13, 6:25 AM CDT, 3 hours 50 minutes before

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Hazardous weather outlook, May 13, 5:15 AM CDT, 5 hours before

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In the hours before

Special weather statement, May 13, 4:24 AM CDT, 5 hours 51 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
May 13, 1:09 AM CDT	Special Weather Statement	TSA	Tulsa	36 min
May 13, 1:59 AM CDT	Wind Advisory	TSA	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 14 more	13 hr
May 13, 3:21 AM CDT	Special Weather Statement	TSA	Okfuskee	114 min
May 13, 4:24 AM CDT	Special Weather Statement	TSA	McIntosh	51 min
May 13, 9:57 AM CDT	River Flood Watch	TSA	Creek	5 hr
May 13, 9:57 AM CDT	River Flood Watch	TSA	Adair	23 hr
May 13, 9:57 AM CDT	River Flood Watch	TSA	Muskogee	5 hr
May 13, 9:57 AM CDT	River Flood Watch	TSA	LeFlore	4 days
May 13, 9:57 AM CDT	River Flood Watch	TSA	Pushmataha	29 hr
May 13, 2:35 PM CDT	River Flood Warning	TSA	Muskogee	12 hr
May 13, 2:38 PM CDT	River Flood Warning	TSA	Creek	12 hr
May 13, 9:57 AM CDT	River Flood Watch	TSA	Crawford, Sebastian	11 hr

Nearby

Flash Flood Watches in Oklahoma, 2009 Flash Flood Watches in Arkansas, 2009 Every flash flood 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.