Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 459, NWS Norman, OK

July 14, 2018Oklahoma County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 14, 2018, 3:14 PM CDT for Oklahoma County, Oklahoma. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 14, 2018, 3:14 PM CDT (20:14 UTC)
Expired
Jul 14, 2018, 3:37 PM CDT
In force
23 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

County Oklahoma County, OK

The radar

The Norman radar (KTLX), 27 km from the middle of the area, began a volume at 20:13 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, 8.2 hours before the alert went out and 37 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 12:00Z on 2018-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 260 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, Norman, OK at 12:00Z on 2018-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 square meters per square second.1939Sfc1 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
260 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1662 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 14, 2:42 PM CDT, 32 minutes earlier.

Area forecast discussion, Jul 14, 2:42 PM CDT, 32 minutes before
Area Forecast Discussion
National Weather Service Norman OK
242 PM CDT Sat Jul 14 2018

.DISCUSSION...
Showers and thunderstorms will continue to develop and move
across parts of the area the rest of this afternoon into Sunday.
Differential heating due to cloud cover today will aid in
development this afternoon. Other boundaries and an upper wave will
also aid in storm development the rest of this afternoon into
tomorrow. Strong winds, small hail, and very heavy rain will be the
main concerns.

Models show generally NW/N flow developing over the region for the
first half of next week with rain chances gradually shifting N and E
of the fa by the middle of next week as the upper high strengthens
over the western U.S. There will be a chance rain could clip NE/Far
E portions of the fa the middle of next week before rain chances end
for the rest of the week. Models also show that a frontal boundary
could move into parts of the area Monday which could help in
storm development. Another frontal boundary could also move into
the region Thursday but this front is currently expected to
remain dry.

Models show that the the region will be influenced more by the
upper high the latter half of next week leading to hotter
temperatures and the dry forecast. Even though heat is a concern
over the next few days, with hotter temperatures next week, the heat
is expected to become even more of a problem for the area.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  75  96  75  97 /  30  30  20  30
Hobart OK         75  98  76  99 /  30  20  20  20
Wichita Falls TX  75  99  76 102 /  20  20  10  10
Gage OK           71  97  71  95 /  30  20  20  40
Ponca City OK     75  96  74  95 /  40  30  30  20
Durant OK         76  97  76  99 /  20  10  10  10

&&

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

17/25
Hazardous weather outlook, Jul 14, 12:00 PM CDT, 3 hours 14 minutes before
Hazardous Weather Outlook
National Weather Service Norman OK
1200 PM CDT Sat Jul 14 2018

OKZ004>048-050>052-TXZ083>090-151700-
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-
1200 PM CDT Sat Jul 14 2018

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

.DAY ONE...This Afternoon and Tonight...

.Thunderstorms...
Scattered thunderstorms are expected again today. A few storms
may produce strong wind gusts up to 60 mph, small hail, and very
heavy rainfall which may result in localized flooding.

.Heat...
Heat index values will reach triple digits across north Texas and
southern Oklahoma and the upper 90s across northern Oklahoma today.

.DAYS TWO THROUGH SEVEN...Sunday through Friday...

.Heat...
Temperatures and heat index values are expected to be even higher
next week. Heat index values will be over 105 and may approach 110
in some areas on Wednesday and Thursday afternoon.

.Thunderstorms...
The chances of thunderstorms will continue through Wednesday,
although storms are not expected to be widespread. The strongest
storms will be capable of producing strong and gusty winds as well
as locally heavy rainfall.

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

MBS

In the hours before

Special weather statement, Jul 14, 1:58 PM CDT, 1 hour 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
158 PM CDT SAT JUL 14 2018

TXZ090-141930-
Clay TX-
158 PM CDT SAT JUL 14 2018

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Clay County Until
230 PM CDT....

AT 155 PM CDT, a strong thunderstorm was located near Newport, moving
north at 5 MPH.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Heavy rain can lead to reduced visibility...

Locations impacted include...
Newport and Vashti.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3359 9804 3361 9798 3347 9798 3347 9811
TIME...MOT...LOC 1855Z 197DEG 4KT 3352 9801

MBS
Special weather statement, Jul 14, 2:02 PM CDT, 1 hour 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
202 PM CDT SAT JUL 14 2018

OKZ025-141930-
Oklahoma OK-
202 PM CDT SAT JUL 14 2018

...SIGNIFICANT WEATHER ADVISORY FOR central Oklahoma County Until 230
PM CDT....

AT 200 PM CDT, a strong thunderstorm was located over northeastern
Oklahoma City, moving northeast at 10 MPH.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Heavy rain can lead to reduced visibility...

Locations impacted include...
Northeastern Oklahoma City, southeastern Edmond, Midwest City, Del
City, Spencer, Jones, Forest Park and Lake Aluma.

This includes the following highways...
 Interstate 35 between mile markers 130 and 140.
 Interstate 44 between mile markers 127 and 142.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3546 9744 3553 9753 3567 9738 3557 9724
TIME...MOT...LOC 1900Z 228DEG 9KT 3557 9740

MBS
Special weather statement, Jul 14, 2:26 PM CDT, 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
226 PM CDT SAT JUL 14 2018

OKZ025-142000-
Oklahoma OK-
226 PM CDT SAT JUL 14 2018

...SIGNIFICANT WEATHER ADVISORY FOR eastern Oklahoma County Until 300
PM CDT....

AT 224 PM CDT, a strong thunderstorm was located over northeastern
Oklahoma City, moving southeast at 10 MPH.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

Locations impacted include...
Northeastern Oklahoma City, southeastern Edmond, Midwest City,
Choctaw, Harrah, Spencer, Jones, Nicoma Park and Arcadia.

This includes the following highways...
 Interstate 40 near mile marker 161.
 Interstate 44 between mile markers 139 and 148.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3554 9741 3566 9736 3564 9717 3542 9725
      3542 9735
TIME...MOT...LOC 1924Z 297DEG 8KT 3552 9733

MBS
Special weather statement, Jul 14, 2:38 PM CDT, 36 minutes before
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Local storm report, Jul 14, 2:59 PM CDT, 15 minutes before
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</head>
<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 7:32 PM CDTSpecial Weather StatementOUNKiowa28 min
Jul 13, 8:14 PM CDTSpecial Weather StatementOUNKiowa31 min
Jul 13, 10:19 PM CDTSpecial Weather StatementOUNComanche41 min
Jul 14, 2:03 AM CDTSpecial Weather StatementOUNGrant27 min
Jul 14, 2:02 PM CDTSpecial Weather StatementOUNOklahoma28 min
Jul 14, 2:26 PM CDTSpecial Weather StatementOUNOklahoma34 min
Jul 14, 2:38 PM CDTSpecial Weather StatementOUNCleveland37 min
Jul 14, 2:45 PM CDTSevere Thunderstorm WarningOUNOklahoma30 min
Jul 14, 4:00 PM CDTSpecial Weather StatementOUNRoger Mills30 min
Jul 14, 4:27 PM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Dewey, Roger Mills26 min
Jul 14, 4:51 PM CDTSpecial Weather StatementOUNCuster24 min
Jul 14, 5:32 PM CDTSpecial Weather StatementOUNCuster, Dewey, Greer28 min
Jul 14, 6:13 PM CDTSpecial Weather StatementOUNCuster17 min
Jul 14, 6:16 PM CDTSpecial Weather StatementOUNTillman29 min
Jul 14, 6:21 PM CDTSpecial Weather StatementOUNComanche24 min
Jul 14, 6:42 PM CDTSevere Thunderstorm WarningOUNComanche36 min
Jul 14, 6:51 PM CDTSpecial Weather StatementOUNGrady24 min
Jul 14, 1:58 PM CDTSpecial Weather StatementOUNClay32 min
Jul 14, 4:32 PM CDTSpecial Weather StatementOUNArcher28 min
Jul 14, 5:40 PM CDTSpecial Weather StatementOUNBaylor35 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018Every severe thunderstorm 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.