Alert archive / Oklahoma / Freeze Warnings in 2018

Freeze Warning 2, NWS Norman, OK

April 3, 201846 counties in Oklahoma; 5 counties in Texas

NWS Norman, OK issued this freeze warning at Apr 3, 2018, 4:07 AM CDT for 46 counties in Oklahoma; 5 counties in Texas. It took effect at Apr 4, 2018, 12:00 AM CDT. It was in force for 10 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 3, 2018, 4:07 AM CDT (09:07 UTC)
In effect from: Apr 4, 2018, 12:00 AM CDT
Expired: Apr 4, 2018, 10:00 AM CDT
In force: 10 hr
Issued by: NWS Norman, OK

All 51 counties

Alfalfa County, OK, Atoka County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton 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, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Clay County, TX, Hardeman County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 76 km from the middle of the area, began a volume at 09:05 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, 9.1 hours before the alert went out and 276 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 358 m²/s²
0-3 km storm-relative helicity: 365 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 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 2, 10:37 PM CDT, 5 hours 30 minutes earlier.

Area forecast discussion, Apr 2, 10:37 PM CDT, 5 hours 30 minutes before

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Hazardous weather outlook, Apr 2, 3:45 PM CDT, 12 hours 22 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 3, 3:50 AM CDT	Fire Weather Watch	OUN	Ellis, Harper, Roger Mills, Woodward	24 hr
Apr 3, 3:50 AM CDT	Red Flag Warning	OUN	Alfalfa, Beckham, Custer, Dewey, Ellis, Greer and 10 more	15 hr
Apr 3, 1:32 PM CDT	Special Weather Statement	OUN	Bryan	28 min

Nearby

Freeze Warnings in Oklahoma, 2018 Freeze Warnings in Texas, 2018 Every freeze warning in 2018

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.