Alert archive / Oklahoma / Special Weather Statements in 2021
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at May 18, 2021, 12:44 AM CDT for Washita County, Oklahoma. It was in force for 61 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
- May 18, 2021, 12:44 AM CDT (05:44 UTC)
- Expired
- May 18, 2021, 1:45 AM CDT
- In force
- 61 min
- Issued by
- NWS Norman, OK
County Washita County, OK
The radar
The Altus AFB radar (KFDR), 111 km from the middle of the area, began a volume at 05:47 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 5.7 hours before the alert went out and 233 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.
- Mixed-layer CAPE
- 1013 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1616 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted.
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</html>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 May 18, 12:43 AM CDT, 1 minute earlier.
Area forecast discussion, May 18, 12:43 AM CDT, 1 minute before
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</html>Hazardous weather outlook, May 17, 10:43 PM CDT, 2 hours 1 minute before
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 1043 PM CDT Mon May 17 2021 OKZ004>048-050>052-TXZ083>090-190345- 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- 1043 PM CDT Mon May 17 2021 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through Tonight... .Thunderstorms... A few strong to severe thunderstorms will remain possible thru late tonight, mainly across portions of northwestern and southwestern Oklahoma, and western north Texas. Hail up to the size of quarters and wind gusts up 60 mph will be possible. .Heavy Rainfall... Localized flooding could occur across portions of southern Oklahoma thru tonight. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday... .Thunderstorms... Thunderstorm chances will continue thru Saturday. A few severe thunderstorms will be possible Tuesday afternoon and evening mainly across portions of eastern and southeastern Oklahoma. Hail up to the size of golf balls and damaging wind gusts up to 60 mph will be possible. Strong to severe storms will again be possible across western Oklahoma and western north Texas Wednesday afternoon and evening. .Heavy Rainfall... Areas of flooding will be possible mainly along and south of Interstate 44 thru at least Wednesday. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook.
In the hours before
Special weather statement, May 17, 11:12 PM CDT, 1 hour 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1112 PM CDT Mon May 17 2021
OKZ033-036-TXZ083-085-180445-
Harmon OK-Jackson OK-Wilbarger TX-Hardeman TX-
1112 PM CDT Mon May 17 2021
...SIGNIFICANT WEATHER ADVISORY FOR southeastern Harmon...
southwestern Jackson...northwestern Wilbarger and central Hardeman
Counties Until 1145 PM CDT...
AT 1109 PM CDT, the leading edge of strong and gusty thunderstorm
winds extended near Eldorado, moving east at 35 MPH.
HAZARDS INCLUDE...
Wind gusts to 50 MPH...
LAT...LON 3428 9988 3473 9988 3471 9948 3457 9932
3426 9931
TIME...MOT...LOC 0409Z 268DEG 32KT 3443 9961
JTSpecial weather statement, May 17, 11:19 PM CDT, 1 hour 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1119 PM CDT Mon May 17 2021
OKZ035>037-180500-
Kiowa OK-Tillman OK-Jackson OK-
1119 PM CDT Mon May 17 2021
...SIGNIFICANT WEATHER ADVISORY FOR southern Kiowa...Tillman and east
central Jackson Counties Until midnight CDT...
AT 1116 PM CDT, non-thunderstorm winds of 40 to 50 mph are possible.
HAZARDS INCLUDE...
Wind gusts to 50 MPH...
LAT...LON 3464 9920 3463 9895 3459 9887 3452 9883
3451 9883 3451 9881 3438 9873 3416 9879
3420 9894 3421 9895 3421 9897 3422 9899
3423 9904 3437 9919
TIME...MOT...LOC 0416Z 268DEG 32KT 3432 9888
JTSpecial weather statement, May 17, 11:29 PM CDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 1129 PM CDT Mon May 17 2021 OKZ004-009-010-014>016-021-180515- Woodward OK-Roger Mills OK-Dewey OK-Harper OK-Beckham OK-Custer OK- Ellis OK- 1129 PM CDT Mon May 17 2021 ...SIGNIFICANT WEATHER ADVISORY FOR southwestern Woodward...Roger Mills...western Dewey...southwestern Harper...northwestern Beckham... northwestern Custer and Ellis Counties Until 1215 AM CDT... AT 1127 PM CDT, strong thunderstorms were along a line extending from 7 miles north of Higgins to 7 miles north of Sweetwater, moving northeast at 50 MPH. HAZARDS INCLUDE... Hail up to one-half inch diameter... Wind gusts to 50 MPH... LAT...LON 3671 10001 3689 9950 3568 9928 3531 10000 TIME...MOT...LOC 0427Z 233DEG 45KT 3623 10004 3553 9990 JT
Special weather statement, May 18, 12:19 AM CDT, 25 minutes before
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</html>Special weather statement, May 18, 12:21 AM CDT, 23 minutes before
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</html>Special weather statement, May 18, 12:44 AM CDT, 0 minutes before
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 10:03 PM CDT | Special Weather Statement | OUN | Jackson | 27 min |
| May 17, 10:29 PM CDT | Special Weather Statement | OUN | Harmon | 31 min |
| May 17, 10:42 PM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 33 min |
| May 17, 11:12 PM CDT | Special Weather Statement | OUN | Jackson | 33 min |
| May 17, 11:19 PM CDT | Special Weather Statement | OUN | Tillman | 41 min |
| May 17, 11:29 PM CDT | Special Weather Statement | OUN | Ellis, Harper, Roger Mills | 46 min |
| May 17, 11:43 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Woodward | 32 min |
| May 18, 12:19 AM CDT | Special Weather Statement | OUN | Woodward | 56 min |
| May 18, 12:21 AM CDT | Special Weather Statement | OUN | Roger Mills | 24 min |
| May 18, 1:02 AM CDT | Special Weather Statement | OUN | Woodward | 58 min |
| May 18, 1:03 AM CDT | Special Weather Statement | OUN | Dewey | 57 min |
| May 18, 1:06 AM CDT | Special Weather Statement | OUN | Jefferson | 24 min |
| May 18, 1:28 AM CDT | Special Weather Statement | OUN | Major | 47 min |
| May 18, 2:00 AM CDT | Special Weather Statement | OUN | Comanche, Kiowa, Tillman | 30 min |
| May 18, 2:35 AM CDT | Special Weather Statement | OUN | Comanche, Cotton, Tillman | 55 min |
| May 18, 2:48 AM CDT | Special Weather Statement | OUN | Kingfisher | 42 min |
| May 18, 2:56 AM CDT | Special Weather Statement | OUN | Garfield | 49 min |
| May 18, 3:36 AM CDT | Special Weather Statement | OUN | Kingfisher | 39 min |
| May 18, 12:03 PM CDT | Special Weather Statement | OUN | Noble | 27 min |
| May 18, 4:14 PM CDT | Special Weather Statement | OUN | Alfalfa | 31 min |
| May 18, 4:44 PM CDT | Special Weather Statement | OUN | Garfield | 46 min |
| May 17, 7:00 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox | 45 min |
| May 17, 7:11 PM CDT | Special Weather Statement | OUN | Wilbarger | 34 min |
| May 17, 7:22 PM CDT | Areal Flood Advisory | OUN | Knox | 3 hr |
| May 17, 7:33 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox | 42 min |
| May 17, 8:00 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Baylor, Wichita | 45 min |
| May 17, 8:17 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Wichita | 23 min |
| May 17, 8:19 PM CDT | Areal Flood Advisory | OUN | Baylor | 3 hr |
| May 17, 8:33 PM CDT | Areal Flood Advisory | OUN | Archer | 3 hr |
| May 17, 9:28 PM CDT | Areal Flood Advisory | OUN | Wichita | 3 hr |
Nearby
Special Weather Statements in Oklahoma, 2021Every 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.