Alert archive / Oklahoma / Tornado Watches in 2016
Tornado Watch 41
The Storm Prediction Center issued this tornado watch at Mar 13, 2016, 12:57 PM CDT for 16 counties in Oklahoma. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2016, 12:57 PM CDT (17:57 UTC)
- Expired
- Mar 13, 2016, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Atoka County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK
The radar
The Tulsa radar (KINX), 113 km from the middle of the area, began a volume at 17:58 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
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 2:59 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 31 min |
| Mar 13, 3:27 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 33 min |
| Mar 13, 3:42 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, LeFlore | 33 min |
| Mar 13, 4:14 PM CDT | Severe Thunderstorm Warning | TSA | Haskell | 31 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, 6.0 hours before the alert went out and 147 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
- 103 J/kg
- Mixed-layer CIN
- -278 J/kg
- Mixed-layer LCL
- 1061 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
517
WWUS20 KWNS 131754
SEL1
SPC WW 131754
ARZ000-OKZ000-140000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 41
NWS STORM PREDICTION CENTER NORMAN OK
100 PM CDT SUN MAR 13 2016
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* TORNADO WATCH FOR PORTIONS OF
WEST CENTRAL ARKANSAS
SOUTHEAST OKLAHOMA
* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 100 PM UNTIL
700 PM CDT.
* PRIMARY THREATS INCLUDE...
A FEW TORNADOES POSSIBLE
SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS
TO 2 INCHES IN DIAMETER POSSIBLE
ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
SUMMARY...THUNDERSTORMS ARE BEGINNING TO FORM OVER SOUTHEAST OK
ALONG A WARM FRONT. THESE STORMS WILL POSE A RISK OF LARGE HAIL AND
ISOLATED TORNADOES THIS AFTERNOON ACROSS THE WATCH AREA.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST OF
MCALESTER OKLAHOMA TO 15 MILES SOUTHEAST OF POTEAU OKLAHOMA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).
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 24030.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 12:35 PM CDT | Mesoscale Discussion | SPC | Coal, Haskell, Latimer, LeFlore, McCurtain, Pittsburg and 1 more | 55 min |
| Mar 13, 2:10 PM CDT | Tornado Watch | SPC | McCurtain | 5 hr |
| Mar 13, 3:19 PM CDT | Mesoscale Discussion | SPC | Coal, Haskell, Hughes, Latimer, LeFlore, McIntosh and 4 more | 86 min |
| Mar 13, 5:35 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Delaware, Haskell, LeFlore, Mayes and 6 more | 85 min |
| Mar 13, 5:58 PM CDT | Mesoscale Discussion | SPC | McCurtain | 92 min |
Nearby
Tornado Watches in Oklahoma, 2016Every tornado watch in 2016
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.