Alert archive / Oklahoma / Special Weather Statements in 2018

Special Weather Statement, NWS Norman, OK

April 6, 2018Carter County, Oklahoma

NWS Norman, OK issued this special weather statement at Apr 6, 2018, 2:13 AM CDT for Carter County, Oklahoma. It was in force for 32 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
Apr 6, 2018, 2:13 AM CDT (07:13 UTC)
Expired
Apr 6, 2018, 2:45 AM CDT
In force
32 min
Issued by
NWS Norman, OK

County Carter County, OK

The radar

The Norman radar (KTLX), 118 km from the middle of the area, began a volume at 07:14 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, 7.2 hours before the alert went out and 104 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2018-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2018-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1759 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
225 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 5, 10:42 PM CDT, 3 hours 31 minutes earlier.

Area forecast discussion, Apr 5, 10:42 PM CDT, 3 hours 31 minutes before
Area Forecast Discussion
National Weather Service Norman OK
1042 PM CDT Thu Apr 5 2018

.DISCUSSION...
Please see the 06Z aviation discussion below.

&&

.AVIATION...
Only minor adjustments were made to the previous set of 00Z TAFs.
Still expect IFR to perhaps brief LIFR cigs and fg to impact a few
of the terminals, although timing as been pushed back 1-2 hours
closer to near and just after sunrise Friday. A few showers will
develop close to OUN/OKC around 14Z but for now have not included
TSRA for any of the terminals as convection should remain east.
This will be watched closely. Breezy north winds will accompany a
cold front Through late in the period.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  69  54  57  25 /   0  30  50  40
Hobart OK         74  54  62  26 /   0  20  30  20
Wichita Falls TX  74  61  76  30 /   0  20  20  20
Gage OK           76  47  50  21 /   0  10  30  40
Ponca City OK     71  46  50  22 /   0  10  70  20
Durant OK         66  58  70  32 /   0  40  60  40

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Freeze Warning from 9 PM Friday to 10 AM CDT Saturday for
     OKZ004>042-044.

     Freeze Watch from Friday evening through Saturday morning for
     OKZ043-045>048-050>052.

TX...Freeze Watch from Friday evening through Saturday morning for
     TXZ083>090.

&&

99/03/03
Hazardous weather outlook, Apr 5, 4:06 PM CDT, 10 hours 7 minutes before
Hazardous Weather Outlook
National Weather Service Norman OK
406 PM CDT Thu Apr 5 2018

OKZ004>048-050>052-TXZ083>090-061100-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
406 PM CDT Thu Apr 5 2018

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Through Tonight...

.Thunderstorms...
There is a chance for showers and thunderstorms after midnight
across the southeast half of Oklahoma. Severe weather is unlikely.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

.Thunderstorms...
Thunderstorm chances continue Friday and expand across much of
Oklahoma. There is a slight risk for severe thunderstorms across
southeast Oklahoma, southeast of Ardmore, Ada, and Holdenville. A
marginal risk for severe thunderstorms is forecast east of areas
from Wichita Falls, Anadarko, Enid, and Ponca City. Thunderstorm
chances will decrease through the evening as colder air arrives from
the north.

.Cold Weather...
A widespread freeze is expected Saturday morning. Freezing
temperatures are expected in northern Oklahoma Sunday morning.

.Winter Precipitation...
Light amounts of freezing rain, snow, and sleet are possible late
Friday and early Saturday morning across a large part of Oklahoma.

.Fire Weather...
Elevated fire weather conditions are expected in western Oklahoma
and adjacent parts of northern Texas on Wednesday.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Special weather statement, Apr 6, 2:13 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 6, 2:46 AM CDTSpecial Weather StatementOUNCarter, Love, Murray29 min
Apr 6, 3:15 AM CDTSpecial Weather StatementOUNLove30 min
Apr 6, 3:22 AM CDTSpecial Weather StatementOUNMurray23 min
Apr 6, 3:35 AM CDTSpecial Weather StatementOUNMarshall25 min
Apr 6, 3:56 AM CDTSpecial Weather StatementOUNBryan34 min
Apr 6, 4:05 AM CDTSpecial Weather StatementOUNMurray25 min
Apr 6, 4:12 AM CDTWind AdvisoryOUNBeckham, Caddo, Carter, Comanche, Cotton, Garvin and 14 more21 hr
Apr 6, 4:25 AM CDTSpecial Weather StatementOUNJohnston35 min
Apr 6, 4:29 AM CDTSpecial Weather StatementOUNBryan31 min
Apr 6, 4:30 AM CDTSpecial Weather StatementOUNJohnston30 min
Apr 6, 4:53 AM CDTSpecial Weather StatementOUNPontotoc37 min
Apr 6, 4:59 AM CDTSpecial Weather StatementOUNJohnston31 min
Apr 6, 5:08 AM CDTSpecial Weather StatementOUNBryan37 min
Apr 6, 5:42 AM CDTSpecial Weather StatementOUNHughes33 min
Apr 6, 5:44 AM CDTSpecial Weather StatementOUNBryan31 min
Apr 6, 5:53 AM CDTSpecial Weather StatementOUNHughes37 min
Apr 6, 5:58 AM CDTSpecial Weather StatementOUNBryan32 min
Apr 6, 6:04 AM CDTSpecial Weather StatementOUNSeminole26 min
Apr 6, 6:40 AM CDTSpecial Weather StatementOUNHughes20 min
Apr 6, 6:58 AM CDTSpecial Weather StatementOUNHughes17 min
Apr 6, 1:25 PM CDTSpecial Weather StatementOUNGarvin35 min
Apr 6, 3:52 PM CDTSpecial Weather StatementOUNMarshall38 min
Apr 6, 4:03 PM CDTSevere Thunderstorm WarningOUNMarshall42 min
Apr 6, 4:21 PM CDTSevere Thunderstorm WarningOUNBryan, Marshall54 min
Apr 6, 4:23 PM CDTSpecial Weather StatementOUNJohnston37 min
Apr 6, 4:56 PM CDTSevere Thunderstorm WarningOUNMarshall49 min
Apr 6, 5:31 PM CDTSevere Thunderstorm WarningOUNBryan, Marshall23 min

Nearby

Special Weather Statements in Oklahoma, 2018Every special weather statement 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.