Alert archive / Oklahoma / Tornado Watches in 2012
Tornado Watch 164
The Storm Prediction Center issued this tornado watch at Apr 14, 2012, 3:42 AM CDT for Chautauqua County, Labette County, Montgomery County, Kansas; 17 counties in Oklahoma. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 14, 2012, 3:42 AM CDT (08:42 UTC)
- Expired
- Apr 14, 2012, 9:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Chautauqua County, KS, Labette County, KS, Montgomery County, KS, Craig County, OK, Creek County, OK, Delaware County, OK, Kay County, OK, Lincoln County, OK, Logan County, OK, Mayes County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 88 km from the middle of the area, began a volume at 08:42 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 4:08 AM CDT | Severe Thunderstorm Warning | TSA | Nowata, Osage, Rogers, Washington | 52 min |
| Apr 14, 4:27 AM CDT | Severe Thunderstorm Warning | OUN | Payne | 63 min |
| Apr 14, 4:28 AM CDT | Severe Thunderstorm Warning | TSA | Creek | 47 min |
| Apr 14, 4:29 AM CDT | Severe Thunderstorm Warning | OUN | Garfield, Noble | 61 min |
| Apr 14, 6:32 AM CDT | Severe Thunderstorm Warning | TSA | Craig, Mayes, Nowata, Rogers, Tulsa, Washington | 43 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, 8.7 hours before the alert went out and 181 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
- 2227 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 617 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 269 m²/s²
- 0-3 km storm-relative helicity
- 389 m²/s²
- Significant tornado parameter
- 3.5
- Supercell composite
- 15.6
The text
As transmitted, in the capitals the NWS used until 2016.
288
WWUS20 KWNS 140839
SEL4
SPC WW 140839
KSZ000-OKZ000-141400-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 164
NWS STORM PREDICTION CENTER NORMAN OK
340 AM CDT SAT APR 14 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EXTREME SOUTHEAST KANSAS
NORTHEAST OKLAHOMA
EFFECTIVE THIS SATURDAY MORNING FROM 340 AM UNTIL 900 AM CDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTHWEST OF PONCA
CITY OKLAHOMA TO 10 MILES NORTHEAST OF GROVE OKLAHOMA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).
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.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 163. WATCH NUMBER 163 WILL NOT BE IN EFFECT AFTER
340 AM CDT.
DISCUSSION...CLUSTER OF STORMS WITH EMBEDDED SUPERCELLS WILL LIKELY
PERSIST THROUGH THE EARLY MORNING HOURS IN CONJUNCTION WITH
LOW-LEVEL WAA AND A FEED OF MOISTURE AND MODERATE INSTABILITY FROM
THE S/SW. STRONG LOW-LEVEL SHEAR AND INSTABILITY ROOTED AT OR VERY
NEAR THE SURFACE WILL SUPPORT THE RISK FOR A COUPLE OF
TORNADOES...AS WELL AS LARGE HAIL AND ISOLATED DAMAGING WINDS.
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 25025.
...THOMPSONSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 9:14 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 17 more | 61 min |
| Apr 14, 7:11 AM CDT | Mesoscale Discussion | SPC | Cherokee, Labette | 64 min |
| Apr 14, 9:42 AM CDT | Mesoscale Discussion | SPC | Clark, Finney, Ford, Gove, Grant, Gray and 10 more | 93 min |
| Apr 14, 10:43 AM CDT | Tornado Watch | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 42 more | 7 hr |
| Apr 14, 11:44 AM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 40 more | 61 min |
| Apr 14, 12:11 PM CDT | Mesoscale Discussion | SPC | Butler, Chase, Chautauqua, Coffey, Cowley, Dickinson and 19 more | 64 min |
| Apr 14, 1:41 PM CDT | Mesoscale Discussion | SPC | Decatur, Rawlins | 2 hr |
| Apr 14, 1:44 PM CDT | Mesoscale Discussion | SPC | Barton, Clark, Cloud, Edwards, Ellis, Ellsworth and 20 more | 61 min |
| Apr 14, 2:28 PM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Jewell, Lincoln, Mitchell, Ottawa and 2 more | 32 min |
| Apr 14, 3:01 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ellsworth and 10 more | 29 min |
| Apr 14, 3:48 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 33 more | 57 min |
| Apr 14, 4:47 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Nemaha | 58 min |
| Apr 14, 4:54 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clay, Cloud, Comanche, Dickinson and 32 more | 66 min |
| Apr 14, 5:00 PM CDT | Tornado Watch | SPC | Doniphan | 7 hr |
| Apr 14, 5:24 PM CDT | Tornado Watch | SPC | Barber, Barton, Brown, Butler, Chase, Chautauqua and 57 more | 9 hr |
| Apr 13, 7:35 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 24 more | 55 min |
| Apr 13, 8:36 PM CDT | Tornado Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 31 more | 7 hr |
| Apr 13, 9:58 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 19 more | 92 min |
| Apr 13, 11:45 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 20 more | 90 min |
| Apr 14, 2:40 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 31 more | 65 min |
| Apr 14, 1:23 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Blaine, Caddo, Canadian, Carter and 21 more | 2 hr |
Nearby
Tornado Watches in Oklahoma, 2012Tornado Watches in Kansas, 2012Every tornado watch in 2012
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.