Alert archive / Oklahoma / Special Weather Statements in 2011

Special Weather Statement, NWS Norman, OK

November 20, 2011Okfuskee County, Oklahoma

NWS Norman, OK issued this special weather statement at Nov 20, 2011, 7:39 PM CST for Okfuskee County, Oklahoma. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Nov 20, 2011, 7:39 PM CST (01:39 UTC)
Expired: Nov 20, 2011, 8:00 PM CST
In force: 21 min
Issued by: NWS Norman, OK

County Okfuskee County, OK

The radar

The Norman radar (KTLX), 65 km from the middle of the area, began a volume at 01:42 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, 1.7 hours before the alert went out and 79 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: 14 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 403 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 285 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 20, 8:37 PM CST	Special Weather Statement	OUN	Pottawatomie	23 min
Nov 20, 9:12 PM CST	Special Weather Statement	OUN	Lincoln	18 min
Nov 21, 10:50 AM CST	Special Weather Statement	OUN	Harmon	25 min
Nov 21, 11:16 AM CST	Special Weather Statement	OUN	Greer, Harmon, Jackson	29 min
Nov 21, 11:47 AM CST	Special Weather Statement	OUN	Greer, Kiowa	28 min
Nov 21, 12:15 PM CST	Special Weather Statement	OUN	Greer, Harmon, Kiowa	30 min
Nov 21, 12:42 PM CST	Special Weather Statement	OUN	Harmon	33 min
Nov 21, 1:35 PM CST	Special Weather Statement	OUN	Jefferson	25 min
Nov 21, 1:50 PM CST	Special Weather Statement	OUN	Canadian	25 min
Nov 21, 5:13 PM CST	Special Weather Statement	OUN	Atoka, Bryan, Marshall	62 min
Nov 21, 5:54 PM CST	Areal Flood Advisory	OUN	Atoka, Bryan	3 hr
Nov 21, 12:41 PM CST	Special Weather Statement	OUN	Archer	34 min

Nearby

Special Weather Statements in Oklahoma, 2011 Every special weather statement in 2011

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.