Alert archive / Oklahoma / Freeze Warnings in 2013

Freeze Warning 4, NWS Norman, OK

April 23, 201336 counties in Oklahoma; Foard County, Hardeman County, Knox County, Texas

NWS Norman, OK issued this freeze warning at Apr 23, 2013, 1:40 PM CDT for 36 counties in Oklahoma; Foard County, Hardeman County, Knox County, Texas. It took effect at Apr 24, 2013, 1:00 AM CDT. It was in force for 8 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: Apr 23, 2013, 1:40 PM CDT (18:40 UTC)
In effect from: Apr 24, 2013, 1:00 AM CDT
Expired: Apr 24, 2013, 9:07 AM CDT
In force: 8 hr
Issued by: NWS Norman, OK

All 39 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pottawatomie County, OK, Roger Mills County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Foard County, TX, Hardeman County, TX, Knox County, TX

The radar

The Norman radar (KTLX), 105 km from the middle of the area, began a volume at 18:38 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, 6.7 hours before the alert went out and 153 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: 1 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 485 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 731 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 freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this freeze warning went out at Apr 23, 12:02 PM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, Apr 23, 12:02 PM CDT, 1 hour 38 minutes before

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Hazardous weather outlook, Apr 23, 11:50 AM CDT, 1 hour 50 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 7:12 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	48 min
Apr 22, 7:23 PM CDT	Severe Thunderstorm Warning	OUN	Woods	37 min
Apr 22, 7:25 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	50 min
Apr 22, 7:56 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	49 min
Apr 22, 8:00 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	30 min
Apr 22, 8:28 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills	47 min
Apr 22, 8:30 PM CDT	Wind Advisory	OUN	Alfalfa, Beckham, Blaine, Caddo, Comanche, Cotton and 14 more	15 hr
Apr 22, 8:42 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Major	48 min
Apr 22, 9:10 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey	50 min
Apr 22, 9:49 PM CDT	Special Weather Statement	OUN	Blaine	41 min
Apr 22, 9:49 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Custer, Washita	41 min
Apr 22, 10:12 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian, Kingfisher	48 min
Apr 22, 10:26 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Custer, Washita	34 min
Apr 22, 10:46 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Oklahoma	44 min
Apr 22, 10:54 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	36 min
Apr 22, 11:27 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	33 min
Apr 22, 11:39 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland	51 min
Apr 22, 11:53 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	37 min
Apr 23, 12:15 AM CDT	Special Weather Statement	OUN	Logan	30 min
Apr 23, 12:26 AM CDT	Special Weather Statement	OUN	Pottawatomie	34 min
Apr 23, 12:48 AM CDT	Special Weather Statement	OUN	Logan	27 min
Apr 23, 12:56 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma	49 min
Apr 23, 1:46 AM CDT	Special Weather Statement	OUN	Lincoln	29 min
Apr 23, 1:40 PM CDT	Frost Advisory	OUN	Atoka, Bryan, Carter, Coal, Cotton, Hughes and 6 more	19 hr

Nearby

Freeze Warnings in Oklahoma, 2013 Freeze Warnings in Texas, 2013 Every freeze warning in 2013

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.