Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 8, NWS Norman, OK

March 19, 20184 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 19, 2018, 12:35 AM CDT for 4 counties in Oklahoma. It was in force for 40 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: Mar 19, 2018, 12:35 AM CDT (05:35 UTC)
Expired: Mar 19, 2018, 1:15 AM CDT
In force: 40 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Alfalfa County, OK, Garfield County, OK, Major County, OK, Noble County, OK

The radar

The Vance AFB radar (KVNX), 35 km from the middle of the area, began a volume at 05:38 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, 5.6 hours before the alert went out and 146 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: 4 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 1251 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 423 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Mar 19, 12:11 AM CDT, 24 minutes earlier.

Area forecast discussion, Mar 19, 12:11 AM CDT, 24 minutes before

Area Forecast Discussion
National Weather Service Norman OK
1211 AM CDT Mon Mar 19 2018

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

&&

.AVIATION...
MVFR cigs and TSRA are expected during the forecast period. An
area of thunderstorms will continue to move into PNC air space
over the next couple of hours. The low cigs will clear and the
winds will shift from the west overnight, and then become
northwest through the early morning hours as a cold front moves in
the area. For now, it appears cigs behind the cold front tomorrow
will remain just above MVFR around 035. Winds may gust as high as
35 to 40 kt during around 16-19Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  55  38  58  37 /   0  10   0   0
Hobart OK         59  36  62  38 /   0   0   0   0
Wichita Falls TX  66  39  63  40 /   0   0   0   0
Gage OK           50  31  60  35 /  10  10   0   0
Ponca City OK     54  36  56  34 /  20  30   0   0
Durant OK         69  43  62  40 /   0  10   0   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Wind Advisory until 7 PM CDT this evening for OKZ004-005-009>011-
     014>018-021>024-027-033>039-044.

TX...Wind Advisory until 7 PM CDT this evening for TXZ083>089.

&&

25/03/03

Hazardous weather outlook, Mar 18, 10:44 PM CDT, 1 hour 51 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1044 PM CDT Sun Mar 18 2018

OKZ004>048-050>052-TXZ083>090-200345-
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-
1044 PM CDT Sun Mar 18 2018

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

.DAY ONE...Tonight...

.Thunderstorms...
A few severe thunderstorms will be possible across portions of
northern, central, and southern Oklahoma late tonight.

Location...
There is a marginal risk of severe storms across most of Oklahoma,
excluding southwest OK.

Timing...
Storms will be most likely between 11 PM and 5 AM.

Impacts...
Hail up to the size of half dollars and wind gusts to 65 mph are
the main concerns.

Discussion...
Showers and thunderstorms will continue to develop through late
tonight, mainly across northern and central Oklahoma. The more
intense storms will be capable of producing quarter to half dollar
size hail and gusty winds.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

Storm spotter groups and emergency management personnel across the
risk areas should prepare for possible severe weather operations
tonight.

.Breezy Winds...
Wind speeds will continue to increase from the west through late
tonight. The strongest gusts are expected across southwest OK and
western north TX, where they could exceed 45 mph.

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

.Thunderstorms...
Some lingering thunderstorms will be possible early Monday. After
a break, thunderstorm chances return Saturday.

.Fire Weather...
Elevated to near critical fire weather conditions will be possible
Monday afternoon, mainly across western Oklahoma and western north
Texas. Elevated conditions will also be possible Friday afternoon.
Otherwise, fire conditions will be low this week.

.Breezy Winds...
Wind directions will shift from the west to northwest during the
day Monday. Wind speeds near 25 to 35 mph with gusts up to 45 to
50 mph will be possible. A wind advisory is in effect.

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

Barnes

In the hours before

Special weather statement, Mar 18, 10:15 PM CDT, 2 hours 20 minutes before

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Special weather statement, Mar 18, 11:18 PM CDT, 1 hour 17 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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</head>
<body>
  <main class="wrap">
    <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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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Mar 18, 11:33 PM CDT, 1 hour 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1133 PM CDT SUN MAR 18 2018

OKZ005-190515-
Woods OK-
1133 PM CDT SUN MAR 18 2018

...SIGNIFICANT WEATHER ADVISORY FOR northeastern Woods County Until
1215 AM CDT...

AT 1131 PM CDT, strong thunderstorms were along a line extending from
10 miles southwest of Aetna to 6 miles northwest of Avard to 3 miles
northwest of Waynoka, moving northeast at 30 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

Locations impacted include...
Alva, Avard, Capron and Hopeton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3700 9855 3694 9854 3670 9863 3660 9897
      3663 9901 3673 9896 3692 9918 3700 9911
TIME...MOT...LOC 0431Z 226DEG 26KT 3695 9905 3679 9884 3663 9892

MAHALE

Special weather statement, Mar 18, 11:43 PM CDT, 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1143 PM CDT SUN MAR 18 2018

OKZ006-011-015-017-190530-
Major OK-Alfalfa OK-Dewey OK-Blaine OK-
1143 PM CDT SUN MAR 18 2018

...SIGNIFICANT WEATHER ADVISORY FOR eastern Major...south central
Alfalfa...eastern Dewey and northwestern Blaine Counties Until 1230
AM CDT...

AT 1140 PM CDT, strong thunderstorms were along a line extending from
5 miles west of Fairview to 3 miles southwest of Eagle City, moving
northeast at 25 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 40 MPH...

Locations impacted include...
Fairview, Okeene, Canton, Cleo Springs, Longdale, Oakwood, Canton
Lake, Orienta, Eagle City, Isabella, Homestead and Southard.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3657 9835 3631 9823 3600 9832 3583 9882
      3624 9871
TIME...MOT...LOC 0440Z 227DEG 23KT 3626 9857 3591 9864

MAHALE

Special weather statement, Mar 19, 12:11 AM CDT, 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1211 AM CDT MON MAR 19 2018

OKZ006-007-011-012-017-018-190545-
Major OK-Garfield OK-Kingfisher OK-Alfalfa OK-Grant OK-Blaine OK-
1211 AM CDT MON MAR 19 2018

...SIGNIFICANT WEATHER ADVISORY FOR eastern Major...western
Garfield...northwestern Kingfisher...southeastern Alfalfa...
southwestern Grant and northeastern Blaine Counties Until 1245 AM
CDT...

AT 1208 AM CDT, strong thunderstorms were along a line extending from
3 miles east of Cleo Springs to 3 miles southeast of Isabella to 3
miles northwest of Hitchcock, moving northeast at 45 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

Locations impacted include...
Enid, Fairview, Helena, Okeene, Lahoma, Ringwood, Drummond, Cleo
Springs, Goltry, Ames, Meno, Nash, Hillsdale, Carrier, Orienta,
Isabella, Homestead and Southard.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3672 9808 3644 9791 3616 9800 3595 9850
      3636 9857
TIME...MOT...LOC 0508Z 225DEG 38KT 3640 9838 3620 9831 3602 9838

MAHALE

Special weather statement, Mar 19, 12:13 AM CDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1213 AM CDT MON MAR 19 2018

OKZ005-006-190545-
Alfalfa OK-Woods OK-
1213 AM CDT MON MAR 19 2018

...SIGNIFICANT WEATHER ADVISORY FOR northwestern Alfalfa and
northeastern Woods Counties Until 1245 AM CDT...

AT 1209 AM CDT, a strong thunderstorm was located near Capron, moving
northeast at 50 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 40 MPH...

Locations impacted include...
Alva, Burlington and Capron.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3699 9833 3675 9857 3680 9877 3700 9863
      3700 9834
TIME...MOT...LOC 0509Z 211DEG 42KT 3686 9860

MAHALE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 9:04 PM CDT	Special Weather Statement	OUN	Harper	41 min
Mar 18, 9:15 PM CDT	Severe Thunderstorm Warning	OUN	Harper	30 min
Mar 18, 9:25 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Roger Mills	50 min
Mar 18, 10:10 PM CDT	Wind Advisory	OUN	Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 17 more	17 hr
Mar 18, 10:15 PM CDT	Special Weather Statement	OUN	Ellis, Woodward	45 min
Mar 18, 11:18 PM CDT	Special Weather Statement	OUN	Major	27 min
Mar 18, 11:33 PM CDT	Special Weather Statement	OUN	Woods	42 min
Mar 18, 11:43 PM CDT	Special Weather Statement	OUN	Major	47 min
Mar 19, 12:11 AM CDT	Special Weather Statement	OUN	Major	34 min
Mar 19, 12:13 AM CDT	Special Weather Statement	OUN	Alfalfa	32 min
Mar 19, 12:45 AM CDT	Special Weather Statement	OUN	Grant	30 min
Mar 19, 12:55 AM CDT	Special Weather Statement	OUN	Johnston, Marshall, Murray, Pontotoc	35 min
Mar 19, 1:08 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay	52 min
Mar 19, 1:28 AM CDT	Special Weather Statement	OUN	Atoka, Bryan, Coal, Hughes, Johnston, Marshall and 1 more	47 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018 Every 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.