Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Norman, OK

April 9, 2021Pottawatomie County, Oklahoma

NWS Norman, OK issued this special weather statement at Apr 9, 2021, 6:38 PM CDT for Pottawatomie County, Oklahoma. It was in force for 52 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 9, 2021, 6:38 PM CDT (23:38 UTC)
Expired: Apr 9, 2021, 7:30 PM CDT
In force: 52 min
Issued by: NWS Norman, OK

County Pottawatomie County, OK

The radar

The Norman radar (KTLX), 28 km from the middle of the area, began a volume at 23:38 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 12:00Z, 11.6 hours before the alert went out and 42 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: 1068 J/kg
Mixed-layer CIN: -311 J/kg
Mixed-layer LCL: 1414 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.6

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 9, 6:33 PM CDT, 5 minutes earlier.

Area forecast discussion, Apr 9, 6:33 PM CDT, 5 minutes before

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Hazardous weather outlook, Apr 9, 11:42 AM CDT, 6 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
1142 AM CDT Fri Apr 9 2021

OKZ004>048-050>052-TXZ083>090-101645-
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-
1142 AM CDT Fri Apr 9 2021

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...
Severe thunderstorms are possible this afternoon and evening,
mainly from 3 to 9 PM. The best chance for severe storms will be
across south central and southeastern Oklahoma, although
conditions will be favorable as far north as the Kansas border
east of Interstate 35. Large hail up to the size of baseballs and
damaging wind gusts up to 80 mph are the main impacts. There is a
low potential for tornadoes across extreme southeastern Oklahoma
mainly from 5 to 9 PM.

.Fire Weather...
Near critical fire weather conditions are possible this afternoon
across western Oklahoma and western north Texas.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

Storm spotter groups and emergency management personnel across
central, southern, and southeastern Oklahoma should prepare for
severe weather operations between 3pm and 9pm today.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

.Thunderstorms...
Thunderstorm chances return to the southern half of Oklahoma
Tuesday through Thursday, although severe weather chances appear
very low at this time.

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, Apr 9, 6:05 PM CDT, 33 minutes before

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Special weather statement, Apr 9, 6:09 PM CDT, 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
609 PM CDT Fri Apr 9 2021

OKZ026-092345-
Lincoln OK-
609 PM CDT Fri Apr 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Lincoln County Until
645 PM CDT...

AT 607 PM CDT, a strong thunderstorm was located near Prague, moving
east at 25 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...

Locations impacted include...
Prague.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3546 9669 3547 9687 3558 9678 3561 9662
      3546 9663
TIME...MOT...LOC 2307Z 270DEG 23KT 3553 9673

Mahale

Local storm report, Apr 9, 6:20 PM CDT, 18 minutes before

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Local storm report, Apr 9, 6:23 PM CDT, 15 minutes before

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Local storm report, Apr 9, 6:34 PM CDT, 4 minutes before

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Special weather statement, Apr 9, 6:38 PM CDT, 0 minutes before

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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 9, 2:57 AM CDT	Wind Advisory	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 31 more	20 hr
Apr 9, 10:21 AM CDT	Special Weather Statement	OUN	Bryan	24 min
Apr 9, 10:32 AM CDT	Special Weather Statement	OUN	Bryan	28 min
Apr 9, 3:21 PM CDT	Special Weather Statement	OUN	Greer	24 min
Apr 9, 3:28 PM CDT	Severe Thunderstorm Warning	OUN	Greer	23 min
Apr 9, 3:35 PM CDT	Special Weather Statement	OUN	Washita	40 min
Apr 9, 3:39 PM CDT	Special Weather Statement	OUN	Kingfisher	36 min
Apr 9, 3:49 PM CDT	Special Weather Statement	OUN	Canadian	26 min
Apr 9, 3:52 PM CDT	Special Weather Statement	OUN	Greer	23 min
Apr 9, 3:57 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	48 min
Apr 9, 4:12 PM CDT	Special Weather Statement	OUN	Logan	33 min
Apr 9, 4:13 PM CDT	Special Weather Statement	OUN	Washita	32 min
Apr 9, 4:23 PM CDT	Special Weather Statement	OUN	Grant	37 min
Apr 9, 4:25 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Payne	50 min
Apr 9, 4:29 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	16 min
Apr 9, 4:36 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	39 min
Apr 9, 4:52 PM CDT	Special Weather Statement	OUN	Kingfisher	23 min
Apr 9, 4:53 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	52 min
Apr 9, 5:06 PM CDT	Severe Thunderstorm Warning	OUN	Grady	39 min
Apr 9, 5:17 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Noble, Payne	43 min
Apr 9, 5:18 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan, Oklahoma	42 min
Apr 9, 5:25 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Payne	50 min
Apr 9, 5:31 PM CDT	Severe Thunderstorm Warning	OUN	Grady, McClain	44 min
Apr 9, 5:36 PM CDT	Special Weather Statement	OUN	Pottawatomie	24 min
Apr 9, 5:39 PM CDT	Special Weather Statement	OUN	Lincoln	36 min
Apr 9, 5:48 PM CDT	Special Weather Statement	OUN	Lincoln	27 min
Apr 9, 5:51 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie, Seminole	39 min
Apr 9, 5:57 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma	48 min
Apr 9, 6:05 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Stephens	40 min
Apr 9, 6:09 PM CDT	Special Weather Statement	OUN	Lincoln	36 min
Apr 9, 6:22 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie, Seminole	27 min
Apr 9, 6:34 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	56 min
Apr 9, 6:58 PM CDT	Special Weather Statement	OUN	Pottawatomie, Seminole	47 min

Nearby

Special Weather Statements in Oklahoma, 2021 Every special weather statement in 2021

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.