Alert archive / Oklahoma / Freeze Watches in 2007

Freeze Watch 2, NWS Tulsa, OK

April 5, 200722 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this freeze watch at Apr 5, 2007, 3:59 PM CDT for 22 counties in Oklahoma; 4 counties in Arkansas. It took effect at Apr 6, 2007, 4:11 AM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Apr 5, 2007, 3:59 PM CDT (20:59 UTC)
In effect from: Apr 6, 2007, 4:11 AM CDT
Expired: Apr 6, 2007, 3:35 PM CDT
In force: 11 hr
Issued by: NWS Tulsa, OK

All 26 counties

Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Choctaw County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pawnee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 42 km from the middle of the area, began a volume at 20:58 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

Springfield, MO (KSGF), launched 12:00Z, 9.0 hours before the alert went out and 176 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: 1490 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: 4 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 watch 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 freeze watch went out at Apr 5, 3:23 PM CDT, 36 minutes earlier.

Area forecast discussion, Apr 5, 3:23 PM CDT, 36 minutes before

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Hazardous weather outlook, Apr 5, 3:15 PM CDT, 44 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
Apr 5, 11:37 AM CDT	Frost Advisory	TSA	Adair, Cherokee, Creek, Haskell, McIntosh, Mayes and 7 more	21 hr
Apr 5, 11:37 AM CDT	Freeze Warning	TSA	Craig, Delaware, Nowata, Ottawa, Washington	21 hr
Apr 5, 3:03 PM CDT	Winter Weather Advisory	TSA	Adair, Cherokee, Craig, Delaware, Mayes, Nowata and 5 more	9 hr
Apr 5, 3:59 PM CDT	Freeze Watch	TSA	Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more	24 hr

Nearby

Freeze Watches in Oklahoma, 2007 Freeze Watches in Arkansas, 2007 Every freeze watch in 2007

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.