Alert archive / Oklahoma / Special Weather Statements in 2021
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at Aug 16, 2021, 4:28 PM CDT for Noble County, Oklahoma. It was in force for 47 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
- Aug 16, 2021, 4:28 PM CDT (21:28 UTC)
- Expired
- Aug 16, 2021, 5:15 PM CDT
- In force
- 47 min
- Issued by
- NWS Norman, OK
- Hail
- 0.50 in
- Wind
- 55
County Noble County, OK
The radar
The Vance AFB radar (KVNX), 105 km from the middle of the area, began a volume at 21:29 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
Springfield, MO (KSGF), launched 12:00Z, 9.5 hours before the alert went out and 294 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
- 109 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Aug 16, 3:27 PM CDT, 1 hour 1 minute earlier.
Area forecast discussion, Aug 16, 3:27 PM CDT, 1 hour 1 minute before
Area Forecast Discussion National Weather Service Norman OK 327 PM CDT Mon Aug 16 2021 ...New SHORT TERM, LONG TERM... .SHORT TERM... (This evening through Tuesday) Issued at 327 PM CDT Mon Aug 16 2021 Weak upper trough will continue to move south across the area this afternoon and tonight. There will be a chance to see scattered convection mainly along and ahead of this trough axis. Flow remains rather weak through a deep layer, so convection will be slow-moving and will pose a heavy rainfall threat. Sufficient instability will also be present for the potential for a few strong to marginally severe storms to linger into the early evening hours. The best chance for this will be across west. May be enough to support a few shower/storms throughout the night. This trough will continue to move slowly south during the day Tuesday with best rain chances across the south/southeast. Although can not count out an isolated storm just about anywhere, especially by afternoon. Main impacts from any storm will be heavy rainfall as again the activity will be slow-moving. && .LONG TERM... (Tuesday night through next Sunday) Issued at 327 PM CDT Mon Aug 16 2021 A weakness in the mid/upper-level pattern will remain in place across the Southern Plains through this week. Shortwave troughs (some subtle) embedded within the weakness and juxtaposed with a moist, weakly-capped atmosphere will continue to provide a daily chance for convection. Residual mesoscale features (e.g., outflow boundaries and MCVs) will also provide the focus for subsequent convective development. The most significant shortwave trough is progged to move through on Thursday, which is currently the day that has the highest probability for convection. Precipitable water values are also progged to increase Thursday and Friday (~1.8 to 2.2"), so the primary hazard with any thunderstorms will be heavy rainfall/flooding. Intense cores may also result in downbursts/gusty winds as storms collapse. Temperatures during the period will remain slightly below seasonal averages. By late in the weekend into early next week, the ~595 dam mid- level ridge across the southeast U.S. will shift/expand to the west. As this occurs, seasonably hot and dry weather is progged by early next week. Even the 90th percentile NBM QPFs drop off markedly by early next week, which indicates ensemble members are in general agreement of a drier pattern. Mahale && .AVIATION... (18Z TAFS) Issued at 1218 PM CDT Mon Aug 16 2021 Mainly VFR conditions to continue. Low clouds at WWR are expected to dissipate near beginning of forecast. Otherwise, mainly mid/high clouds. Will keep a mention of afternoon tsra at WWR/CSM. Convection is possible elsewhere, but chances remain too low to mention in TAFs. Winds will remain light. && .UPPER AIR... Issued at 315 AM CDT Sat Aug 14 2021 No upper air flights are currently scheduled. && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 70 88 70 89 / 20 20 10 20 Hobart OK 70 92 69 91 / 30 20 10 20 Wichita Falls TX 71 92 71 90 / 30 40 20 30 Gage OK 65 91 67 90 / 20 20 0 10 Ponca City OK 68 88 69 90 / 20 20 10 20 Durant OK 71 91 71 91 / 20 50 20 50 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && SHORT TERM...30 LONG TERM....10 AVIATION...30
Hazardous weather outlook, Aug 16, 12:25 PM CDT, 4 hours 3 minutes before
Hazardous Weather Outlook National Weather Service Norman OK 1225 PM CDT Mon Aug 16 2021 OKZ004>048-050>052-TXZ083>090-171100- 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- 1225 PM CDT Mon Aug 16 2021 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through Tonight... .Thunderstorms... Scattered thunderstorms are expected today with the highest chances across western and southeastern Oklahoma. Isolated strong to marginally severe storms are possible, mainly during the afternoon and evening. The best chance of strong to marginally severe storms will be northwest of an Altus to Ponca City line. Wind gusts of 60 mph will be possible with the strongest storms along with some hail. Slow moving thunderstorms will produce heavy rainfall and local flooding will be possible in areas where storms persist. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday... .Thunderstorms... A daily chance for thunderstorms will continue through Sunday. Heavy rain may accompany the storms, and some may produce gusty winds and hail. However, organized severe weather is not expected. 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, Aug 16, 4:28 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Norman OK
428 PM CDT Mon Aug 16 2021
OKZ013-162215-
Noble OK-
428 PM CDT Mon Aug 16 2021
...A strong thunderstorm will impact portions of northeastern Noble
County through 515 PM CDT...
At 427 PM CDT, Doppler radar was tracking a strong thunderstorm near
Sooner Lake, moving southeast at 10 mph.
HAZARD...Wind gusts of 50 to 55 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Morrison and Sooner Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3651 9703 3633 9703 3633 9692 3625 9700
3625 9702 3643 9716 3652 9708
TIME...MOT...LOC 2127Z 310DEG 8KT 3645 9706
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH
03The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 6:22 AM CDT | Special Weather Statement | OUN | Ellis | 23 min |
| Aug 16, 6:49 AM CDT | Special Weather Statement | OUN | Ellis | 26 min |
| Aug 16, 8:36 AM CDT | Special Weather Statement | OUN | Harper | 24 min |
| Aug 16, 8:45 AM CDT | Areal Flood Advisory | OUN | Harper | 3 hr |
| Aug 16, 9:23 AM CDT | Flash Flood Warning | OUN | Harper | 3 hr |
| Aug 16, 4:30 PM CDT | Special Weather Statement | OUN | Washita | 45 min |
| Aug 16, 6:36 PM CDT | Special Weather Statement | OUN | Oklahoma | 24 min |
| Aug 16, 6:43 PM CDT | Special Weather Statement | OUN | Payne | 32 min |
| Aug 16, 6:50 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Oklahoma | 40 min |
| Aug 16, 6:55 PM CDT | Areal Flood Advisory | OUN | Oklahoma | 3 hr |
| Aug 16, 5:26 PM CDT | Special Weather Statement | OUN | Baylor | 34 min |
| Aug 16, 5:32 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Baylor, Wichita, Wilbarger | 58 min |
| Aug 16, 6:33 PM CDT | Special Weather Statement | OUN | Knox | 27 min |
| Aug 16, 6:58 PM CDT | Special Weather Statement | OUN | Wilbarger | 32 min |
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.