Alert archive / Oklahoma / Areal Flood Warnings in 2012

Areal Flood Warning 6, NWS Tulsa, OK

March 20, 20129 counties in Oklahoma

NWS Tulsa, OK issued this areal flood warning at Mar 20, 2012, 9:54 PM CDT for 9 counties in Oklahoma. It was in force for 35 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 20, 2012, 9:54 PM CDT (02:54 UTC)
Expired: Mar 22, 2012, 8:45 AM CDT
In force: 35 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 90 km from the middle of the area, began a volume at 02:56 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, 2.9 hours before the alert went out and 194 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: 6 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1260 m above ground
0-6 km bulk shear: 84 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 186 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 areal flood warning 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 areal flood warning went out at Mar 20, 9:25 PM CDT, 29 minutes earlier.

Area forecast discussion, Mar 20, 9:25 PM CDT, 29 minutes before

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Hazardous weather outlook, Mar 20, 5:10 PM CDT, 4 hours 44 minutes before

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In the hours before

Local storm report, Mar 20, 5:01 PM CDT, 4 hours 53 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
Mar 20, 9:51 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Craig, Delaware, McIntosh, Mayes and 6 more	36 hr
Mar 20, 9:58 PM CDT	Flash Flood Warning	TSA	Adair, Delaware, Haskell, LeFlore, Sequoyah	12 hr
Mar 21, 8:34 AM CDT	River Flood Advisory	TSA	Cherokee	4 hr
Mar 21, 9:45 AM CDT	Areal Flood Warning	TSA	Adair, Delaware, Haskell, LeFlore, Sequoyah	12 hr
Mar 21, 12:28 PM CDT	River Flood Warning	TSA	Cherokee	46 hr

Nearby

Areal Flood Warnings in Oklahoma, 2012 Every areal flood warning in 2012

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.