Alert archive / Oklahoma / Freeze Watches in 2016

Freeze Watch 4, NWS Tulsa, OK

March 19, 201622 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this freeze watch at Mar 19, 2016, 2:44 PM CDT for 22 counties in Oklahoma; 4 counties in Arkansas. It took effect at Mar 21, 2016, 1:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued: Mar 19, 2016, 2:44 PM CDT (19:44 UTC)
In effect from: Mar 21, 2016, 1:00 AM CDT
Expired: Mar 20, 2016, 3:56 AM CDT
In force
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 19:45 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 12:00Z, 7.7 hours before the alert went out and 204 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: 1703 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: -13 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 Mar 19, 2:31 PM CDT, 13 minutes earlier.

Area forecast discussion, Mar 19, 2:31 PM CDT, 13 minutes before

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Hazardous weather outlook, Mar 19, 1:06 PM CDT, 1 hour 38 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
Mar 19, 3:57 AM CDT	Freeze Watch	TSA	Choctaw, Latimer, Pittsburg, Pushmataha	11 hr
Mar 19, 3:57 AM CDT	Freeze Warning	TSA	Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more	29 hr

Nearby

Freeze Watches in Oklahoma, 2016 Freeze Watches in Arkansas, 2016 Every freeze watch in 2016

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.