Alert archive / Oklahoma / Special Weather Statements in 2020

Special Weather Statement, NWS Norman, OK

August 11, 2020Kay County, Noble County, Oklahoma

NWS Norman, OK issued this special weather statement at Aug 11, 2020, 12:21 AM CDT for Kay County, Noble County, Oklahoma. It was in force for 39 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
Aug 11, 2020, 12:21 AM CDT (05:21 UTC)
Expired
Aug 11, 2020, 1:00 AM CDT
In force
39 min
Issued by
NWS Norman, OK

Counties Kay County, OK, Noble County, OK

The radar

The Vance AFB radar (KVNX), 103 km from the middle of the area, began a volume at 05:20 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

Dodge City, (KDDC), launched 00:00Z, 5.4 hours before the alert went out and 290 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, Dodge City, at 00:00Z on 2020-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 154 joules per kilogram.LCLLFCEL10008507005003002001001 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, Dodge City, at 00:00Z on 2020-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.193958Sfc1 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
154 J/kg
Mixed-layer CIN
-362 J/kg
Mixed-layer LCL
2311 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 Aug 10, 6:32 PM CDT, 5 hours 49 minutes earlier.

Area forecast discussion, Aug 10, 6:32 PM CDT, 5 hours 49 minutes before
Area Forecast Discussion
National Weather Service Norman OK
632 PM CDT Mon Aug 10 2020

...New AVIATION...

.SHORT TERM...
(This evening through Tuesday)
Issued at 140 PM CDT Mon Aug 10 2020

Isolate showers and thunderstorms will persist across northern
reaches of Oklahoma this afternoon in the hot and very humid
airmass. Aloft, a weak mid-level wave will approach KS and
northern Oklahoma later today and provide more support for
showers/storms this evening and overnight. A dry line over the
western panhandles this afternoon will initiate more storms as it
moves east into the central panhandles by early evening. Some of
these storms are expected to move into western and northern
Oklahoma this evening and continue across at least the north into
early Tuesday. By this time, the upper trough will move across
northern Oklahoma and keep scattered showers and clouds around
east of I-35 into Tuesday afternoon.

&&

.LONG TERM...
(Tuesday night through next Sunday)
Issued at 243 PM CDT Mon Aug 10 2020

The upper-level ridge over the desert Southwest will remain the
main feature affecting our weather through the period. After the
upper-level wave from tonight/tomorrow moves off to the southeast,
there is little in the way of disturbances in the flow until at
least the weekend. Around that time, the upper high shifts north
into Utah and vicinity, altering the northwest flow to more
northerly flow across the southern Plains. This will, assuming it
happens, help bring somewhat cooler air into the region this
weekend. It may also bring more widespread chances for rain.

&&

.AVIATION...
(00Z TAFS)
Issued at 624 PM CDT Mon Aug 10 2020

Thunderstorms have erupted near a weak surface boundary near the
Oklahoma/Kansas border, aided by an upper-level wave. As the wave
departs to the southeast, and nighttime cooling commences, the
storms are expected to diminish. However, there is great
uncertainty regarding whether or not (and where) storms may form
on surface outflow boundaries during the night...and into Tuesday
morning. We have included VCTS for KWWR and KPNC this evening, as
storms should be near those airports for another couple of hours
or so, but otherwise have not mentioned TS because of the low
probability. Otherwise, expect mainly south winds and VFR
conditions.

CmS
&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  76  96  75  96 /  20  20  10  10
Hobart OK         75  99  75 100 /  30  10  10   0
Wichita Falls TX  78  99  77 100 /   0  10   0   0
Gage OK           67  98  71 101 /  50  10  20  10
Ponca City OK     73  94  73  93 /  50  30  20  20
Durant OK         77  98  76  98 /  10  10  10  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...None.
TX...None.
&&

SHORT TERM...09
LONG TERM....23
AVIATION...23
Hazardous weather outlook, Aug 10, 11:03 PM CDT, 1 hour 18 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1103 PM CDT Mon Aug 10 2020

OKZ004>048-050>052-TXZ083>090-120415-
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-
1103 PM CDT Mon Aug 10 2020

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

.DAY ONE...Tonight...

.Thunderstorms...
Strong to severe storms will be possible through late tonight
across portions of central and southern Oklahoma, and perhaps
portions of north Texas. Damaging wind gusts, small hail, and
heavy rain that could lead to flooding are the main concerns.

Showers and thunderstorms will remain possible over much of the
area through early Tuesday morning but the potential for severe
storms will diminish by 2 AM.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday...

.Thunderstorms...
Low chances for thunderstorms will continue most days through the
weekend.

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

In the hours before

Local storm report, Aug 10, 11:35 PM CDT, 46 minutes before
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Local storm report, Aug 10, 11:38 PM CDT, 43 minutes before
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Local storm report, Aug 10, 11:43 PM CDT, 38 minutes before
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Special weather statement, Aug 10, 11:46 PM CDT, 35 minutes before
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Local storm report, Aug 10, 11:49 PM CDT, 32 minutes before
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Special weather statement, Aug 11, 12:21 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
Aug 10, 7:12 PM CDTSpecial Weather StatementOUNWoods33 min
Aug 10, 7:14 PM CDTSpecial Weather StatementOUNHarper31 min
Aug 10, 7:16 PM CDTAreal Flood AdvisoryOUNHarper3 hr
Aug 10, 7:30 PM CDTAreal Flood AdvisoryOUNHarper3 hr
Aug 10, 7:37 PM CDTSpecial Weather StatementOUNHarper38 min
Aug 10, 7:38 PM CDTSpecial Weather StatementOUNWoods52 min
Aug 10, 7:47 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods43 min
Aug 10, 7:57 PM CDTSpecial Weather StatementOUNEllis33 min
Aug 10, 8:09 PM CDTSevere Thunderstorm WarningOUNEllis, Woodward51 min
Aug 10, 8:30 PM CDTSpecial Weather StatementOUNAlfalfa, Grant45 min
Aug 10, 8:44 PM CDTSevere Thunderstorm WarningOUNDewey, Ellis, Roger Mills, Woodward61 min
Aug 10, 8:54 PM CDTTornado WarningOUNWoodward9 min
Aug 10, 9:25 PM CDTSpecial Weather StatementOUNGarfield35 min
Aug 10, 9:29 PM CDTSevere Thunderstorm WarningOUNBlaine, Custer, Dewey, Major, Woodward46 min
Aug 10, 9:33 PM CDTSpecial Weather StatementOUNGreer, Harmon27 min
Aug 10, 9:38 PM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Greer, Harmon, Jackson, Kiowa and 2 more52 min
Aug 10, 10:04 PM CDTSevere Thunderstorm WarningOUNGreer, Jackson, Kiowa, Washita41 min
Aug 10, 10:16 PM CDTSpecial Weather StatementOUNBlaine, Custer, Kingfisher44 min
Aug 10, 10:36 PM CDTSpecial Weather StatementOUNDewey39 min
Aug 10, 10:40 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche, Cotton, Jackson, Kiowa, Tillman and 1 more50 min
Aug 10, 10:44 PM CDTSpecial Weather StatementOUNCanadian, Kingfisher, Logan46 min
Aug 10, 10:56 PM CDTSevere Thunderstorm WarningOUNCanadian, Kingfisher, Logan, Oklahoma49 min
Aug 10, 11:21 PM CDTSpecial Weather StatementOUNGarfield, Grant, Kay, Noble, Payne69 min
Aug 10, 11:24 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche, Cotton, Grady, Stephens, Tillman51 min
Aug 10, 11:34 PM CDTSpecial Weather StatementOUNCleveland, Lincoln, McClain, Oklahoma, Pottawatomie56 min
Aug 10, 11:46 PM CDTSpecial Weather StatementOUNCanadian, Logan59 min
Aug 11, 12:00 AM CDTSevere Thunderstorm WarningOUNCanadian, Cleveland, Grady, Kingfisher, Logan, McClain and 1 more50 min
Aug 11, 12:09 AM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Garvin, Grady, Jefferson, McClain and 1 more51 min
Aug 11, 12:23 AM CDTSpecial Weather StatementOUNGreer, Kiowa82 min
Aug 11, 12:29 AM CDTAreal Flood AdvisoryOUNCanadian, Cleveland, Grady, Kingfisher, Logan, McClain and 1 more3 hr
Aug 11, 12:36 AM CDTSpecial Weather StatementOUNCleveland, McClain, Pottawatomie, Seminole54 min
Aug 11, 12:44 AM CDTSpecial Weather StatementOUNLincoln, Payne61 min
Aug 11, 1:02 AM CDTSpecial Weather StatementOUNCotton, Garvin, Jefferson, Stephens43 min
Aug 11, 1:29 AM CDTSpecial Weather StatementOUNGrady46 min
Aug 11, 2:04 AM CDTSpecial Weather StatementOUNComanche41 min
Aug 11, 3:24 AM CDTSpecial Weather StatementOUNGarvin36 min
Aug 11, 4:35 AM CDTSpecial Weather StatementOUNPontotoc25 min
Aug 11, 3:34 PM CDTSpecial Weather StatementOUNCoal41 min
Aug 11, 3:36 PM CDTSpecial Weather StatementOUNCoal39 min
Aug 11, 3:47 PM CDTSevere Thunderstorm WarningOUNCoal, Hughes, Pontotoc43 min
Aug 11, 3:57 PM CDTSpecial Weather StatementOUNHughes33 min
Aug 11, 4:04 PM CDTSevere Thunderstorm WarningOUNCoal, Hughes41 min
Aug 11, 4:21 PM CDTSpecial Weather StatementOUNCoal39 min
Aug 11, 4:23 PM CDTSpecial Weather StatementOUNCoal52 min
Aug 11, 4:37 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal38 min
Aug 11, 5:15 PM CDTSpecial Weather StatementOUNAtoka30 min
Aug 11, 5:46 PM CDTSpecial Weather StatementOUNAtoka29 min
Aug 11, 5:53 PM CDTAreal Flood AdvisoryOUNAtoka3 hr
Aug 11, 6:17 PM CDTSpecial Weather StatementOUNBryan43 min
Aug 11, 6:24 PM CDTSevere Thunderstorm WarningOUNBryan36 min
Aug 11, 6:32 PM CDTSpecial Weather StatementOUNBryan28 min
Aug 11, 6:53 PM CDTSpecial Weather StatementOUNAtoka52 min
Aug 11, 1:07 AM CDTSpecial Weather StatementOUNBaylor, Foard, Knox53 min

Nearby

Special Weather Statements in Oklahoma, 2020Every special weather statement in 2020

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.