Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Norman, OK

July 16, 2021Washita County, Oklahoma

NWS Norman, OK issued this special weather statement at Jul 16, 2021, 2:00 AM CDT for Washita County, Oklahoma. It was in force for 30 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: Jul 16, 2021, 2:00 AM CDT (07:00 UTC)
Expired: Jul 16, 2021, 2:30 AM CDT
In force: 30 min
Issued by: NWS Norman, OK

County Washita County, OK

The radar

The Altus AFB radar (KFDR), 90 km from the middle of the area, began a volume at 07:00 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, 7.0 hours before the alert went out and 153 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: 1131 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1305 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

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 Jul 16, 12:31 AM CDT, 1 hour 29 minutes earlier.

Area forecast discussion, Jul 16, 12:31 AM CDT, 1 hour 29 minutes before

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Hazardous weather outlook, Jul 16, 12:04 AM CDT, 1 hour 56 minutes before

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In the hours before

Special weather statement, Jul 16, 12:25 AM CDT, 1 hour 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1225 AM CDT Fri Jul 16 2021

OKZ033-034-036-160600-
Harmon OK-Greer OK-Jackson OK-
1225 AM CDT Fri Jul 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR central Harmon...south central
Greer and west central Jackson Counties Until 100 AM CDT...

AT 1224 AM CDT, a strong thunderstorm was located near Hollis, moving
east at 30 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

LAT...LON 3460 9993 3466 9999 3475 9999 3488 9969
      3464 9959
TIME...MOT...LOC 0524Z 253DEG 28KT 3469 9987

JP

Special weather statement, Jul 16, 1:23 AM CDT, 37 minutes before

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Special weather statement, Jul 16, 1:41 AM CDT, 19 minutes before

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Special weather statement, Jul 16, 2:00 AM 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
Jul 15, 7:15 PM CDT	Areal Flood Advisory	OUN	Ellis, Harper, Woodward	3 hr
Jul 16, 12:25 AM CDT	Special Weather Statement	OUN	Harmon	35 min
Jul 16, 12:36 AM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	39 min
Jul 16, 1:23 AM CDT	Special Weather Statement	OUN	Custer	37 min
Jul 16, 1:41 AM CDT	Special Weather Statement	OUN	Tillman	34 min
Jul 16, 1:50 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Kiowa, Tillman	24 min
Jul 16, 2:04 AM CDT	Special Weather Statement	OUN	Dewey	26 min
Jul 16, 2:10 AM CDT	Special Weather Statement	OUN	Custer	35 min
Jul 16, 2:43 AM CDT	Special Weather Statement	OUN	Blaine	32 min
Jul 16, 2:51 AM CDT	Areal Flood Advisory	OUN	Comanche	3 hr
Jul 16, 3:37 AM CDT	Areal Flood Advisory	OUN	Caddo	3 hr
Jul 16, 5:10 AM CDT	Areal Flood Advisory	OUN	Oklahoma	3 hr
Jul 16, 6:06 PM CDT	Special Weather Statement	OUN	Love	24 min
Jul 16, 6:22 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Love, Marshall	38 min
Jul 16, 6:53 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	16 min
Jul 16, 6:54 PM CDT	Special Weather Statement	OUN	Grant	36 min
Jul 16, 6:58 PM CDT	Special Weather Statement	OUN	Love	32 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.