Alert archive / Oklahoma / Tornado Watches in 2018
Tornado Watch 429
The Storm Prediction Center issued this tornado watch at Nov 30, 2018, 5:23 PM CST for 54 counties in Oklahoma; 25 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 30, 2018, 5:23 PM CST (23:23 UTC)
- Expired
- Dec 1, 2018, 1:00 AM CST
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 79 counties
Adair County, OK, Atoka County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Kingfisher County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Archer County, TX, Clay County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX, Henderson County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Kaufman County, TX, Lamar County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Tarrant County, TX, Van Zandt County, TX, Wichita County, TX, Wise County, TX
The radar
The Altus AFB radar (KFDR), 136 km from the middle of the area, began a volume at 23:26 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
40 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 30, 5:23 PM CST | Severe Thunderstorm Warning | OUN | Cotton, Jefferson | 52 min |
| Nov 30, 6:20 PM CST | Severe Thunderstorm Warning | TSA | Adair, Delaware | 35 min |
| Nov 30, 6:28 PM CST | Severe Thunderstorm Warning | FWD | Jack, Palo Pinto, Stephens, Young | 62 min |
| Nov 30, 6:48 PM CST | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Grady, McClain, Oklahoma | 42 min |
| Nov 30, 7:04 PM CST | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 41 min |
| Nov 30, 7:08 PM CST | Severe Thunderstorm Warning | OUN | Clay | 22 min |
| Nov 30, 7:21 PM CST | Severe Thunderstorm Warning | FWD | Jack, Palo Pinto, Parker, Wise | 54 min |
| Nov 30, 7:38 PM CST | Severe Thunderstorm Warning | OUN | Caddo, Comanche | 32 min |
| Nov 30, 7:45 PM CST | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Grady, Stephens | 45 min |
| Nov 30, 8:04 PM CST | Severe Thunderstorm Warning | FWD | Denton, Parker, Tarrant, Wise | 56 min |
| Nov 30, 8:30 PM CST | Severe Thunderstorm Warning | TSA | Haskell, Latimer, McIntosh, Muskogee, Pittsburg | 60 min |
| Nov 30, 8:32 PM CST | Severe Thunderstorm Warning | TSA | Creek, Osage, Pawnee, Tulsa | 58 min |
| Nov 30, 8:33 PM CST | Severe Thunderstorm Warning | OUN | Lincoln | 13 min |
| Nov 30, 8:35 PM CST | Severe Thunderstorm Warning | OUN | Carter, Johnston, Murray, Pontotoc | 25 min |
| Nov 30, 8:41 PM CST | Tornado Warning | TSA | Haskell, Muskogee, Pittsburg | 49 min |
| Nov 30, 9:07 PM CST | Severe Thunderstorm Warning | TSA | Osage, Pawnee, Washington | 53 min |
| Nov 30, 9:12 PM CST | Severe Thunderstorm Warning | TSA | Creek, Muskogee, Nowata, Okfuskee, Okmulgee, Osage and 4 more | 63 min |
| Nov 30, 9:14 PM CST | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Coal, Johnston | 46 min |
| Nov 30, 9:19 PM CST | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Haskell, Muskogee, Sequoyah | 41 min |
| Nov 30, 9:20 PM CST | Severe Thunderstorm Warning | FWD | Collin, Denton, Grayson | 42 min |
| Nov 30, 9:26 PM CST | Tornado Warning | TSA | Adair, Cherokee, Haskell, Muskogee, Sequoyah | 49 min |
| Nov 30, 9:39 PM CST | Tornado Warning | TSA | Nowata, Rogers, Tulsa, Washington | 25 min |
| Nov 30, 9:44 PM CST | Severe Thunderstorm Warning | FWD | Dallas, Tarrant | 61 min |
| Nov 30, 9:49 PM CST | Severe Thunderstorm Warning | TSA | Choctaw, Latimer, Pittsburg, Pushmataha | 56 min |
| Nov 30, 9:59 PM CST | Tornado Warning | TSA | Adair, Cherokee | 46 min |
| Nov 30, 10:00 PM CST | Severe Thunderstorm Warning | FWD | Collin, Dallas, Rockwall | 45 min |
| Nov 30, 10:01 PM CST | Severe Thunderstorm Warning | TSA | Craig, Nowata, Washington | 44 min |
| Nov 30, 10:08 PM CST | Tornado Warning | TSA | Latimer, Pushmataha | 23 min |
| Nov 30, 10:12 PM CST | Severe Thunderstorm Warning | TSA | Craig, Mayes, Nowata, Rogers, Wagoner | 63 min |
| Nov 30, 10:14 PM CST | Severe Thunderstorm Warning | TSA | Cherokee, Haskell, McIntosh, Muskogee, Pittsburg, Sequoyah and 1 more | 46 min |
| Nov 30, 10:18 PM CST | Severe Thunderstorm Warning | TSA | Haskell, Latimer, LeFlore, Pushmataha, Sequoyah | 57 min |
| Nov 30, 10:25 PM CST | Severe Thunderstorm Warning | FWD | Collin, Hopkins, Hunt, Kaufman, Rains, Rockwall and 1 more | 80 min |
| Nov 30, 10:29 PM CST | Tornado Warning | TSA | Adair, Delaware | 20 min |
| Nov 30, 10:34 PM CST | Tornado Warning | FWD | Hunt, Kaufman, Rains, Rockwall, Van Zandt | 41 min |
| Nov 30, 10:39 PM CST | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Delaware, Haskell, Sequoyah | 53 min |
| Nov 30, 10:50 PM CST | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 55 min |
| Nov 30, 10:52 PM CST | Severe Thunderstorm Warning | TSA | Cherokee, Craig, Delaware, Mayes, Ottawa, Wagoner | 53 min |
| Nov 30, 11:09 PM CST | Tornado Warning | TSA | Sequoyah | 21 min |
| Nov 30, 11:12 PM CST | Severe Thunderstorm Warning | FWD | Kaufman, Rains, Van Zandt | 63 min |
| Nov 30, 11:43 PM CST | Severe Thunderstorm Warning | FWD | Hopkins, Hunt, Rains, Van Zandt | 62 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.4 hours before the alert went out and 126 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1498 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 242 m²/s²
- 0-3 km storm-relative helicity
- 337 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
759
WWUS20 KWNS 302321
SEL9
SPC WW 302321
OKZ000-TXZ000-010600-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 429
NWS Storm Prediction Center Norman OK
520 PM CST Fri Nov 30 2018
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
central and eastern Oklahoma
parts of North Texas
* Effective this Friday afternoon from 520 PM until Midnight CST.
* Primary threats include...
A few tornadoes possible
Scattered large hail likely with isolated very large hail events
to 2 inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Strong/severe thunderstorms are forecast to continue to
develop over the next few hours, and move quickly northeastward
across Oklahoma and North Texas. Large hail and damaging winds will
be possible with stronger storms, as well as risk for a few
tornadoes.
The tornado watch area is approximately along and 85 statute miles
east and west of a line from 20 miles west southwest of Fort Worth
TX to 35 miles north northeast of Chandler OK. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 22040.
...GossSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 30, 3:34 PM CST | Mesoscale Discussion | SPC | Adair, Haskell, Latimer, LeFlore, McCurtain, Pushmataha and 1 more | 116 min |
| Nov 30, 3:51 PM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Caddo, Canadian, Carter, Cleveland and 20 more | 84 min |
Nearby
Tornado Watches in Oklahoma, 2018Tornado Watches in Texas, 2018Every tornado watch 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.