Alert archive / Oklahoma / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 92
The Storm Prediction Center issued this severe thunderstorm watch at Apr 27, 2014, 5:33 AM CDT for 57 counties in Oklahoma. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2014, 5:33 AM CDT (10:33 UTC)
- Expired
- Apr 27, 2014, 12:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 57 counties
Alfalfa County, OK, Atoka County, OK, Blaine 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, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major 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, 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
The radar
The Norman radar (KTLX), 50 km from the middle of the area, began a volume at 10:34 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 5:38 AM CDT | Severe Thunderstorm Warning | OUN | Comanche, Grady | 52 min |
| Apr 27, 5:54 AM CDT | Severe Thunderstorm Warning | OUN | Canadian, Grady, Kingfisher, Logan, Oklahoma | 51 min |
| Apr 27, 6:20 AM CDT | Severe Thunderstorm Warning | OUN | Canadian, Kingfisher, Logan, Oklahoma | 40 min |
| Apr 27, 6:36 AM CDT | Severe Thunderstorm Warning | OUN | Garfield, Logan, Noble, Payne | 24 min |
| Apr 27, 6:38 AM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher, Logan | 37 min |
| Apr 27, 7:08 AM CDT | Severe Thunderstorm Warning | OUN | Canadian, Logan, Oklahoma | 22 min |
| Apr 27, 7:24 AM CDT | Severe Thunderstorm Warning | OUN | Logan, Noble, Payne | 51 min |
| Apr 27, 7:29 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Logan, Oklahoma, Payne | 46 min |
| Apr 27, 7:45 AM CDT | Severe Thunderstorm Warning | OUN | Cotton, Jefferson, Stephens | 45 min |
| Apr 27, 7:58 AM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal, Johnston, Marshall, Pontotoc | 47 min |
| Apr 27, 7:59 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Osage, Pawnee | 46 min |
| Apr 27, 8:01 AM CDT | Severe Thunderstorm Warning | OUN | Logan, Oklahoma | 29 min |
| Apr 27, 8:20 AM CDT | Severe Thunderstorm Warning | TSA | Osage | 25 min |
| Apr 27, 8:36 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Payne | 39 min |
| Apr 27, 8:47 AM CDT | Severe Thunderstorm Warning | OUN | Bryan, Marshall | 43 min |
| Apr 27, 9:14 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 46 min |
| Apr 27, 9:36 AM CDT | Severe Thunderstorm Warning | OUN | Atoka | 39 min |
| Apr 27, 9:39 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Osage, Pawnee | 51 min |
| Apr 27, 10:08 AM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg, Pushmataha | 52 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 00:00Z, 10.6 hours before the alert went out and 63 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
- 1087 J/kg
- Mixed-layer CIN
- -181 J/kg
- Mixed-layer LCL
- 1782 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 5:09 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 26 more | 96 min |
| Apr 27, 7:55 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Canadian, Carter, Cherokee, Choctaw and 45 more | 95 min |
| Apr 27, 10:06 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Cherokee, Choctaw, Coal, Craig and 16 more | 84 min |
| Apr 27, 12:25 PM CDT | Mesoscale Discussion | SPC | LeFlore, McCurtain, Sequoyah | 2 hr |
| Apr 27, 1:46 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Choctaw, Craig, Delaware, Haskell and 11 more | 9 hr |
| Apr 27, 3:36 PM CDT | Tornado Watch | SPC | LeFlore, McCurtain | 7 hr |
| Apr 27, 4:52 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Haskell, LeFlore, McCurtain, Sequoyah | 53 min |
| Apr 27, 4:57 PM CDT | Mesoscale Discussion | SPC | Ottawa | 63 min |
| Apr 27, 6:10 PM CDT | Mesoscale Discussion | SPC | Ottawa | 95 min |
| Apr 27, 6:11 PM CDT | Mesoscale Discussion | SPC | Adair, Haskell, LeFlore, McCurtain, Sequoyah | 64 min |
| Apr 27, 6:26 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Choctaw, Delaware, Haskell, Latimer and 2 more | 8 hr |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2014Every severe thunderstorm watch in 2014
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.