Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 88, NWS Norman, OK

April 4, 2017Lincoln County, Payne County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 4, 2017, 4:33 PM CDT for Lincoln County, Payne County, Oklahoma. It was in force for 42 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: Apr 4, 2017, 4:33 PM CDT (21:33 UTC)
Expired: Apr 4, 2017, 5:15 PM CDT
In force: 42 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Lincoln County, OK, Payne County, OK

The radar

The Norman radar (KTLX), 70 km from the middle of the area, began a volume at 21:37 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 4, 2:31 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.6 hours before the alert went out and 86 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: 1038 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 383 m²/s²
0-3 km storm-relative helicity: 758 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 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 Apr 4, 2:51 PM CDT, 1 hour 42 minutes earlier.

Area forecast discussion, Apr 4, 2:51 PM CDT, 1 hour 42 minutes before

Area Forecast Discussion
National Weather Service Norman OK
251 PM CDT Tue Apr 4 2017

.DISCUSSION...
Sfc low will move NE across the fa, generally along or near I-44,
the rest of this afternoon and early evening with the cold front
clearing the area later this evening. Scattered showers have
increased across portions of the fa over the last few hours as lift
associated with the upper low has spread into the area. Showers and
thunderstorms will remain possible across portions of the area into
tonight but gradually end overnight into early Wednesday as the
upper low moves away from the fa. With cold air aloft, some
instability and good wind shear, some severe storms will be possible
the rest of this afternoon into early evening with large hail the
biggest concern.

After tonight, dry conditions are expected until Sunday into early
next week when another storm system and cold front affect parts of
the region. Shower and thunderstorm chances will return to parts of
the area Sunday and continue early next week.

Cold temperatures are expected tonight and Wednesday night with some
locations expected to fall into the 30s. High temperatures the next
few days will remain at or below normal but then warm into the
70s and 80s over the weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  44  63  39  67 /  30  10   0   0
Hobart OK         41  64  37  70 /  20  10   0   0
Wichita Falls TX  43  67  40  73 /  10   0   0   0
Gage OK           37  61  34  67 /  40  10   0   0
Ponca City OK     45  62  37  65 /  80  20   0   0
Durant OK         46  66  42  70 /  40  10   0   0

&&

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

09/25

Hazardous weather outlook, Apr 4, 3:44 PM CDT, 49 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
344 PM CDT Tue Apr 4 2017

OKZ004>048-050>052-TXZ083>090-052045-
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-
344 PM CDT Tue Apr 4 2017

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

.DAY ONE...Today and Tonight...

.Thunderstorms...
There is an enhanced risk of severe thunderstorms through early
this evening across parts of central and northeastern Oklahoma.

.Location...
The enhanced risk area is near and east of areas from Ponca City to
Perry to Guthrie to Chandler. The slight risk area is near and
east of areas from Medford to Watonga to Duncan to Atoka. There
is a marginal risk of severe thunderstorms for much of the rest
of Oklahoma.

.Timing...
Now through 10 PM.

.Impacts...
Hail up to the size of tennis balls is expected to be the main
hazard. Damaging wind gusts of 60 to 70 mph are possible as well.

.Discussion...
A storm system will continue to move into Oklahoma through this
evening. Near the surface, a front will extend from near the
Oklahoma City metro southwestward into portions of western north
Texas while a warm front extends northeastward from Oklahoma City
to Tulsa.

Showers and thunderstorms will continue to increase in coverage
and intensity across central and northeastern Oklahoma through
early this evening. The showers and storms will move east and
northeast. The chance of severe thunderstorms will decrease
quickly after 10 PM this evening across central Oklahoma as they
continue to move into eastern Oklahoma.

.Spotter and emergency management statement...
Storm spotter groups and emergency management personnel across
most of Oklahoma should prepare for possible severe weather
operations this afternoon and evening.

.Fire Weather...
Elevated to near critical fire weather conditions will be possible
across western north Texas this afternoon into early evening where
gusty southwest winds and low humidities are occurring.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

.Thunderstorms...
Thunderstorm chances will return to the forecast Sunday into
Monday as a dryline sets up across western Oklahoma and western
north Texas. Severe thunderstorms may be possible on Sunday.

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, Apr 4, 4:08 PM CDT, 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
408 PM CDT TUE APR 4 2017

OKZ019-025-026-042145-
Oklahoma OK-Logan OK-Lincoln OK-
408 PM CDT TUE APR 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR northeastern Oklahoma...
southeastern Logan and northwestern Lincoln Counties Until 445 PM
CDT...

AT 404 PM CDT, a strong thunderstorm was located over eastern Edmond,
moving northeast at 55 MPH.

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

LAT...LON 3555 9719 3564 9741 3594 9724 3594 9693
TIME...MOT...LOC 2104Z 219DEG 49KT 3565 9727

SIX

Special weather statement, Apr 4, 4:18 PM CDT, 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
418 PM CDT TUE APR 4 2017

OKZ026-030-042145-
Pottawatomie OK-Lincoln OK-
418 PM CDT TUE APR 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR north central Pottawatomie and
southeastern Lincoln Counties Until 445 PM CDT...

AT 417 PM CDT, a strong thunderstorm was located near Johnson, moving
northeast at 40 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3541 9672 3543 9672 3541 9674 3541 9677
      3538 9678 3536 9680 3537 9691 3574 9668
      3568 9662 3547 9662
TIME...MOT...LOC 2117Z 206DEG 33KT 3541 9681

30

Special weather statement, Apr 4, 4:19 PM CDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
419 PM CDT TUE APR 4 2017

OKZ018-019-024-042145-
Kingfisher OK-Logan OK-Canadian OK-
419 PM CDT TUE APR 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Kingfisher...
northwestern Logan and north central Canadian Counties Until 445 PM
CDT...

AT 417 PM CDT, a strong thunderstorm was located 4 miles southeast of
Kingfisher, moving northeast at 55 MPH.

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

LAT...LON 3616 9735 3562 9786 3590 9812 3617 9773
TIME...MOT...LOC 2117Z 219DEG 49KT 3582 9786

SIX

Special weather statement, Apr 4, 4:20 PM CDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
420 PM CDT TUE APR 4 2017

OKZ031-032-042145-
Hughes OK-Seminole OK-
420 PM CDT TUE APR 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR northwestern Hughes and
southeastern Seminole Counties Until 445 PM CDT...

AT 419 PM CDT, strong thunderstorms were along a line extending from
7 miles northwest of Sasakwa to 3 miles north of Francis, moving
northeast at 60 MPH.

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

LAT...LON 3505 9625 3490 9660 3490 9664 3493 9668
      3509 9668 3530 9644 3529 9644 3529 9626
TIME...MOT...LOC 2119Z 212DEG 51KT 3502 9661 3492 9661

30

Local storm report, Apr 4, 4:26 PM CDT, 7 minutes before

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Local storm report, Apr 4, 4:28 PM CDT, 5 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.

Issued	Product	Office	Counties	Lasted
Apr 3, 9:48 PM CDT	Special Weather Statement	OUN	Ellis	42 min
Apr 3, 10:49 PM CDT	Special Weather Statement	OUN	Roger Mills	26 min
Apr 3, 11:02 PM CDT	Special Weather Statement	OUN	Ellis	28 min
Apr 3, 11:14 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	29 min
Apr 3, 11:29 PM CDT	Special Weather Statement	OUN	Dewey	31 min
Apr 3, 11:43 PM CDT	Special Weather Statement	OUN	Custer	32 min
Apr 4, 12:13 AM CDT	Special Weather Statement	OUN	Custer	47 min
Apr 4, 12:43 AM CDT	Special Weather Statement	OUN	Blaine	32 min
Apr 4, 1:19 AM CDT	Special Weather Statement	OUN	Kingfisher	26 min
Apr 4, 1:44 AM CDT	Special Weather Statement	OUN	Kingfisher, Logan	46 min
Apr 4, 3:30 PM CDT	Special Weather Statement	OUN	Seminole	30 min
Apr 4, 3:35 PM CDT	Special Weather Statement	OUN	Kingfisher	25 min
Apr 4, 3:40 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie, Seminole	35 min
Apr 4, 3:43 PM CDT	Special Weather Statement	OUN	Lincoln	32 min
Apr 4, 3:45 PM CDT	Special Weather Statement	OUN	Oklahoma	30 min
Apr 4, 3:47 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	43 min
Apr 4, 4:08 PM CDT	Special Weather Statement	OUN	Lincoln	37 min
Apr 4, 4:18 PM CDT	Special Weather Statement	OUN	Lincoln	27 min
Apr 4, 4:19 PM CDT	Special Weather Statement	OUN	Kingfisher	26 min
Apr 4, 4:20 PM CDT	Special Weather Statement	OUN	Hughes	25 min
Apr 4, 4:23 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	22 min
Apr 4, 4:25 PM CDT	Severe Thunderstorm Warning	OUN	Payne	20 min
Apr 4, 4:45 PM CDT	Special Weather Statement	OUN	Logan	30 min
Apr 4, 4:47 PM CDT	Special Weather Statement	OUN	Hughes	28 min
Apr 4, 4:57 PM CDT	Special Weather Statement	OUN	Coal	33 min
Apr 4, 5:09 PM CDT	Special Weather Statement	OUN	Noble	36 min
Apr 4, 5:33 PM CDT	Special Weather Statement	OUN	Payne	27 min
Apr 4, 5:34 PM CDT	Special Weather Statement	OUN	Atoka, Bryan	26 min
Apr 4, 5:42 PM CDT	Special Weather Statement	OUN	Kay	33 min
Apr 4, 5:46 PM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble	44 min
Apr 4, 5:55 PM CDT	Special Weather Statement	OUN	Foard	35 min
Apr 4, 6:21 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Wilbarger	39 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every severe thunderstorm warning in 2017

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.