Alert archive / Oklahoma / Areal Flood Warnings in 2017

Areal Flood Warning 20, NWS Tulsa, OK

August 7, 2017Choctaw County, Oklahoma

NWS Tulsa, OK issued this areal flood warning at Aug 7, 2017, 4:14 AM CDT for Choctaw County, Oklahoma. It was in force for 12 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: Aug 7, 2017, 4:14 AM CDT (09:14 UTC)
Expired: Aug 7, 2017, 4:15 PM CDT
In force: 12 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

County Choctaw County, OK

The radar

The Western Arkansas radar (KSRX), 178 km from the middle of the area, began a volume at 09:14 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

Fort Worth, TX (KFWD), launched 00:00Z, 9.2 hours before the alert went out and 209 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: 2574 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1772 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

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 Aug 6, 6:07 PM CDT, 10 hours 7 minutes earlier.

Area forecast discussion, Aug 6, 6:07 PM CDT, 10 hours 7 minutes before

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Hazardous weather outlook, Aug 6, 5:08 PM CDT, 11 hours 6 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
Aug 6, 9:26 PM CDT	Areal Flood Advisory	TSA	Choctaw	3 hr
Aug 6, 10:18 PM CDT	Flash Flood Warning	TSA	Choctaw	6 hr

Nearby

Areal Flood Warnings in Oklahoma, 2017 Every areal flood warning in 2017

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.