Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at May 28, 2021, 1:29 AM CDT for Clay County, Texas. It was in force for 31 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 28, 2021, 1:29 AM CDT (06:29 UTC)
- Expired
- May 28, 2021, 2:00 AM CDT
- In force
- 31 min
- Issued by
- NWS Norman, OK
County Clay County, TX
The radar
The Altus AFB radar (KFDR), 118 km from the middle of the area, began a volume at 06:31 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
Fort Worth, TX (KFWD), launched 00:00Z, 6.5 hours before the alert went out and 114 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
- 1480 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 1331 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.7
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 28, 12:01 AM CDT, 1 hour 28 minutes earlier.
Area forecast discussion, May 28, 12:01 AM CDT, 1 hour 28 minutes before
Area Forecast Discussion National Weather Service Norman OK 1201 AM CDT Fri May 28 2021 ...New AVIATION... .SHORT TERM... (This evening through Friday) Issued at 224 PM CDT Thu May 27 2021 Strong to severe thunderstorms will continue into the evening across most of the area as a cold front moves into minimally- capped environment (per 18Z special upper air sounding). The ongoing storms could push out an outflow boundary or two, which could lead to slight enhancement of a tornado threat if any storms can form along it, as winds ahead of the boundary could be backed slightly. Currently, as storms form along the aforementioned cold front later this afternoon, there may be a brief window for some discrete storms. The deep-layer shear vector being mostly parallel to the boundary will foster storm conglomeration shortly after initiation, and eventually forming into a line that will move through west-central and central OK. The main threats still appear to be damaging winds in excess of 80mph and hail up to the size of baseballs, as SPC mesoanalysis suggests there is at least MLCAPE values upwards of at least 3000 J/kg across the area. With numerous storms producing heavy rain rates across areas with already moist soils, flooding and flash flooding could be possible across central OK into northern and northeast OK. Bunker && .LONG TERM... (Friday night through next Wednesday) Issued at 224 PM CDT Thu May 27 2021 Over the weekend mid-level heights will gradually increase as an approaching mid-level ridge moves into the area. Showers and thunderstorms are possible on Sunday as a shortwave trough traverses the area and attendant upslope flow along the Rockies. Another shortwave should move through on Monday morning, bringing with it additional chances for showers and storms. A longwave trough will move in by Tuesday morning and an associated cold front will bring in showers and storms across the area. Northerly surface flow should persist through much of the long term, with slight chances for showers and storms. High temperatures should stay in the mid to upper 70s across most of the area throughout the period. Bunker && .AVIATION... (06Z TAFS) Issued at 1041 PM CDT Thu May 27 2021 Storms have moved south of the TAF sites with cold front moving through Red River valley. Most sites will remain VFR with a light/moderate north to northeast wind tonight and tomorrow. Lower ceilings will hang in at SPS through much of the day with MVFR going to VFR in the afternoon. Have also included a mention of thunder at SPS tomorrow afternoon && .UPPER AIR... Issued at 224 PM CDT Thu May 27 2021 An Upper Air flight is planned later at 00Z. && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 59 72 54 72 / 80 0 10 10 Hobart OK 60 75 56 74 / 60 10 10 10 Wichita Falls TX 65 77 60 76 / 80 30 30 20 Gage OK 53 72 53 73 / 0 10 10 10 Ponca City OK 53 72 50 72 / 30 0 0 0 Durant OK 66 80 59 75 / 90 30 20 10 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && SHORT TERM...13 LONG TERM....13 AVIATION...30
Hazardous weather outlook, May 27, 9:22 PM CDT, 4 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Norman OK 922 PM CDT Thu May 27 2021 OKZ004>048-050>052-TXZ083>090-290230- 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- 922 PM CDT Thu May 27 2021 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Tonight... .Thunderstorms... Showers and thunderstorms will continue to affect portions of southern Oklahoma and western north Texas. Some of the storms could become strong to severe with up to golf ball size hail and wind gusts of 60 to 70 mph possible. Locally heavy rain could also be a concern in a few locations. .DAYS TWO THROUGH SEVEN...Friday through Wednesday... .Thunderstorms... Friday and Saturday will see thunderstorm chances across mainly southern Oklahoma and north Texas. More widespread chances for showers and storms will return Sunday through Wednesday of next week. 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, May 27, 10:23 PM CDT, 3 hours 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1023 PM CDT THU MAY 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1019 PM HAIL BURKBURNETT 34.08N 98.56W
05/27/2021 E1.00 INCH WICHITA TX TRAINED SPOTTER
&&
EMLocal storm report, May 27, 10:31 PM CDT, 2 hours 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1031 PM CDT THU MAY 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1025 PM TSTM WND GST SHEPPARD AFB 33.98N 98.50W
05/27/2021 M62 MPH WICHITA TX ASOS
&&
EMLocal storm report, May 27, 10:41 PM CDT, 2 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1041 PM CDT THU MAY 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1036 PM HAIL 2 SW SHEPPARD AFB 33.96N 98.52W
05/27/2021 E1.50 INCH WICHITA TX OTHER FEDERAL
EXIT 3C ON I-44
&&
EMSpecial weather statement, May 27, 11:03 PM CDT, 2 hours 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 1103 PM CDT Thu May 27 2021 TXZ084-087-280430- Foard TX-Knox TX- 1103 PM CDT Thu May 27 2021 ...SIGNIFICANT WEATHER ADVISORY FOR southeastern Foard and northeastern Knox Counties Until 1130 PM CDT... AT 1101 PM CDT, a strong thunderstorm was located 8 miles southeast of Crowell, moving southeast at 10 MPH. HAZARDS INCLUDE... Hail up to the size of nickels... Wind gusts to 50 MPH... This storm will remain over mainly rural areas of southeastern Foard and northeastern Knox Counties. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the weather situation closely and be alert for threatening weather conditions. && LAT...LON 3384 9978 3393 9970 3392 9948 3374 9953 TIME...MOT...LOC 0401Z 298DEG 9KT 3387 9965 Mahale
Special weather statement, May 28, 12:13 AM CDT, 1 hour 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1213 AM CDT Fri May 28 2021
TXZ084-087-280545-
Foard TX-Knox TX-
1213 AM CDT Fri May 28 2021
...SIGNIFICANT WEATHER ADVISORY FOR southeastern Foard and
northeastern Knox Counties Until 1245 AM CDT...
AT 1212 AM CDT, a strong thunderstorm was located 5 miles north of
Gilliland, moving southeast at 30 MPH.
HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 3392 9972 3387 9948 3370 9947 3362 9948
3375 9980
TIME...MOT...LOC 0512Z 292DEG 24KT 3381 9968
30Special weather statement, May 28, 1:29 AM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 129 AM CDT Fri May 28 2021 TXZ090-280700- Clay TX- 129 AM CDT Fri May 28 2021 ...SIGNIFICANT WEATHER ADVISORY FOR southeastern Clay County Until 200 AM CDT... AT 127 AM CDT, a strong thunderstorm was located 7 miles west of Newport, moving east at 45 MPH. HAZARDS INCLUDE... Hail up to the size of nickels... Wind gusts to 50 MPH... LAT...LON 3359 9829 3359 9798 3347 9798 3347 9832 TIME...MOT...LOC 0627Z 277DEG 37KT 3351 9815 30
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 7:06 PM CDT | Areal Flood Advisory | OUN | Lincoln | 114 min |
| May 27, 7:11 PM CDT | Areal Flood Advisory | OUN | Lincoln, Pottawatomie, Seminole | 2 hr |
| May 27, 7:35 PM CDT | Special Weather Statement | OUN | Grady | 25 min |
| May 27, 7:51 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 39 min |
| May 27, 8:09 PM CDT | Special Weather Statement | OUN | Stephens | 36 min |
| May 27, 8:26 PM CDT | Areal Flood Advisory | OUN | Canadian, Cleveland, Kingfisher, Lincoln, Logan, Oklahoma | 3 hr |
| May 27, 8:35 PM CDT | River Flood Watch | OUN | Bryan | 14 hr |
| May 27, 8:41 PM CDT | River Flood Advisory | OUN | Payne | 24 hr |
| May 27, 8:42 PM CDT | River Flood Advisory | OUN | Kingfisher, Logan | 24 hr |
| May 27, 8:57 PM CDT | Special Weather Statement | OUN | Stephens | 33 min |
| May 27, 9:25 PM CDT | Special Weather Statement | OUN | Stephens | 35 min |
| May 27, 9:46 PM CDT | Special Weather Statement | OUN | Tillman | 29 min |
| May 27, 10:04 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 41 min |
| May 27, 10:34 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Jefferson | 41 min |
| May 27, 11:11 PM CDT | Severe Thunderstorm Warning | OUN | Jefferson, Love | 49 min |
| May 28, 4:42 AM CDT | River Flood Advisory | OUN | Pottawatomie, Seminole | 11 hr |
| May 28, 4:42 AM CDT | River Flood Advisory | OUN | Lincoln, Oklahoma, Pottawatomie | 11 hr |
| May 27, 8:26 PM CDT | Severe Thunderstorm Warning | OUN | Hardeman, Wilbarger | 49 min |
| May 27, 8:34 PM CDT | Special Weather Statement | OUN | Foard | 26 min |
| May 27, 9:06 PM CDT | Severe Thunderstorm Warning | OUN | Wilbarger | 39 min |
| May 27, 9:15 PM CDT | Special Weather Statement | OUN | Wilbarger | 30 min |
| May 27, 10:12 PM CDT | Special Weather Statement | OUN | Wichita | 33 min |
| May 27, 10:36 PM CDT | Severe Thunderstorm Warning | OUN | Foard | 39 min |
| May 27, 11:00 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 45 min |
| May 27, 11:03 PM CDT | Special Weather Statement | OUN | Foard | 27 min |
| May 27, 11:27 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Foard, Knox | 48 min |
| May 28, 12:09 AM CDT | Severe Thunderstorm Warning | OUN | Archer, Baylor | 51 min |
| May 28, 12:13 AM CDT | Special Weather Statement | OUN | Knox | 32 min |
| May 28, 12:46 AM CDT | Severe Thunderstorm Warning | OUN | Archer, Clay | 44 min |
| May 28, 2:13 AM CDT | Special Weather Statement | OUN | Foard | 32 min |
| May 28, 4:55 AM CDT | Special Weather Statement | OUN | Foard, Hardeman | 35 min |
| May 28, 5:24 AM CDT | Special Weather Statement | OUN | Foard, Hardeman | 36 min |
| May 28, 8:14 AM CDT | Special Weather Statement | OUN | Hardeman | 31 min |
| May 28, 8:14 AM CDT | Special Weather Statement | OUN | Wilbarger | 31 min |
Nearby
Special Weather Statements in Texas, 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.