Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 444, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 6, 2018, 2:55 PM CDT for Roger Mills County, Oklahoma. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 6, 2018, 2:55 PM CDT (19:55 UTC)
- Expired
- Jul 6, 2018, 3:30 PM CDT
- In force
- 35 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
County Roger Mills County, OK
The radar
The Altus AFB radar (KFDR), 161 km from the middle of the area, began a volume at 19:59 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, 7.9 hours before the alert went out and 214 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
- 1253 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1257 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 6, 12:19 PM CDT, 2 hours 36 minutes earlier.
Area forecast discussion, Jul 6, 12:19 PM CDT, 2 hours 36 minutes before
Area Forecast Discussion...UPDATED National Weather Service Norman OK 1219 PM CDT Fri Jul 6 2018 .AVIATION... Isolated to scattered thunderstorms are possible across the region throughout the afternoon into early evening. Confidence is too low to mention in TAFs, however any storms that do develop will have the potential for brief heavy rain and gusty, variable winds. Otherwise, light northeast to east winds and VFR conditions will prevail. Day && .PREV DISCUSSION... /issued 1028 AM CDT Fri Jul 6 2018/ UPDATE... Isolated showers and a few storms will continue to be possible this morning. Activity could become more scattered over parts of the fa this afternoon. The models seem to favor western and southern portions of the fa a little more than the rest of the area for the scattered activity. This seems to be an area where precipitable water is a little bit higher than in other parts of the fa. Have increased PoPs to chance across southern and western portions of the fa. All this being said, with the moist airmass and heating, showers/storms are possible anywhere in the fa this afternoon and early evening. Very heavy rain and cloud to ground lightning are still expected to be the main concerns with many of the storms but gusty winds could be possible with the stronger storms. Cloud cover is expected to increase as the day progresses and cu develops. Made some adjustments to sky cover and dewpoints to show current trends. With dewpoints, the drying trend was slowed down. All updates out soon. && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 94 73 91 68 / 20 20 10 0 Hobart OK 94 73 93 70 / 30 20 20 10 Wichita Falls TX 95 73 95 72 / 30 20 20 10 Gage OK 89 69 90 67 / 30 20 20 0 Ponca City OK 94 71 91 65 / 20 10 10 0 Durant OK 94 73 92 71 / 30 20 20 10 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && 25/10/14
Hazardous weather outlook, Jul 6, 11:46 AM CDT, 3 hours 9 minutes before
Hazardous Weather Outlook National Weather Service Norman OK 1146 AM CDT Fri Jul 6 2018 OKZ004>048-050>052-TXZ083>090-071700- 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- 1146 AM CDT Fri Jul 6 2018 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through Tonight... .Thunderstorms... Isolated to scattered thunderstorms are possible. The greatest coverage of storms are expected across western and southern Oklahoma and adjacent parts of north Texas through the early evening. The stronger storms will produce very heavy rainfall and strong gusty winds. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Thunderstorms... Thunderstorms are possible across portions of the area Saturday, and also Monday through Wednesday. Severe storms are unlikely. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook. Mahale
In the hours before
Special weather statement, Jul 6, 2:15 PM CDT, 40 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
215 PM CDT FRI JUL 6 2018
OKZ004-061945-
Harper OK-
215 PM CDT FRI JUL 6 2018
...SIGNIFICANT WEATHER ADVISORY FOR southeastern Harper County Until
245 PM CDT....
AT 214 PM CDT, a strong thunderstorm was located 6 miles south of
Selman, moving south at 5 MPH.
HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 50 MPH...
Heavy rain can lead to reduced visibility...
LAT...LON 3679 9938 3661 9931 3659 9959 3659 9961
3676 9960
TIME...MOT...LOC 1914Z 351DEG 5KT 3670 9948
..speg.Special weather statement, Jul 6, 2:20 PM CDT, 35 minutes before
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</html>Local storm report, Jul 6, 2:23 PM CDT, 32 minutes before
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</html>Special weather statement, Jul 6, 2:34 PM CDT, 21 minutes before
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</html>Special weather statement, Jul 6, 2:49 PM CDT, 6 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 |
|---|---|---|---|---|
| Jul 6, 12:08 PM CDT | Special Weather Statement | OUN | Kiowa | 37 min |
| Jul 6, 1:11 PM CDT | Special Weather Statement | OUN | Jackson | 34 min |
| Jul 6, 1:40 PM CDT | Special Weather Statement | OUN | Roger Mills | 35 min |
| Jul 6, 1:55 PM CDT | Special Weather Statement | OUN | Harper | 35 min |
| Jul 6, 1:58 PM CDT | Special Weather Statement | OUN | Tillman | 32 min |
| Jul 6, 2:06 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 24 min |
| Jul 6, 2:15 PM CDT | Special Weather Statement | OUN | Harper | 30 min |
| Jul 6, 2:20 PM CDT | Special Weather Statement | OUN | Beckham | 25 min |
| Jul 6, 2:29 PM CDT | Severe Thunderstorm Warning | OUN | Jackson, Tillman | 31 min |
| Jul 6, 2:31 PM CDT | Special Weather Statement | OUN | Harper | 29 min |
| Jul 6, 2:34 PM CDT | Special Weather Statement | OUN | Roger Mills | 26 min |
| Jul 6, 2:49 PM CDT | Special Weather Statement | OUN | Beckham | 26 min |
| Jul 6, 3:22 PM CDT | Special Weather Statement | OUN | Jackson | 23 min |
| Jul 6, 3:23 PM CDT | Special Weather Statement | OUN | Beckham | 37 min |
| Jul 6, 3:54 PM CDT | Special Weather Statement | OUN | Dewey | 36 min |
| Jul 6, 4:03 PM CDT | Special Weather Statement | OUN | Harmon | 27 min |
| Jul 6, 4:07 PM CDT | Severe Thunderstorm Warning | OUN | Dewey | 23 min |
| Jul 6, 4:14 PM CDT | Special Weather Statement | OUN | Roger Mills | 31 min |
| Jul 6, 4:42 PM CDT | Areal Flood Advisory | OUN | Beckham, Custer, Washita | 2 hr |
| Jul 6, 4:44 PM CDT | Special Weather Statement | OUN | Kay | 31 min |
| Jul 6, 4:52 PM CDT | Special Weather Statement | OUN | Atoka | 23 min |
| Jul 6, 4:54 PM CDT | Special Weather Statement | OUN | Roger Mills | 36 min |
| Jul 6, 5:07 PM CDT | Special Weather Statement | OUN | Noble | 23 min |
| Jul 6, 5:14 PM CDT | Special Weather Statement | OUN | Atoka | 31 min |
| Jul 6, 5:19 PM CDT | Special Weather Statement | OUN | Lincoln | 26 min |
| Jul 6, 5:42 PM CDT | Special Weather Statement | OUN | Cotton | 33 min |
| Jul 6, 5:46 PM CDT | Special Weather Statement | OUN | Lincoln | 29 min |
| Jul 6, 6:00 PM CDT | Special Weather Statement | OUN | Greer | 30 min |
| Jul 6, 6:14 PM CDT | Special Weather Statement | OUN | Bryan | 31 min |
| Jul 6, 6:38 PM CDT | Special Weather Statement | OUN | Cotton | 37 min |
| Jul 6, 1:35 PM CDT | Special Weather Statement | OUN | Hardeman | 25 min |
| Jul 6, 6:47 PM CDT | Special Weather Statement | OUN | Cooke | 28 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2018Every severe thunderstorm warning in 2018
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.