Alert archive / Oklahoma / Tornado Watches in 2016
Tornado Watch 155
The Storm Prediction Center issued this tornado watch at May 9, 2016, 2:36 PM CDT for 11 counties in Arkansas; 34 counties in Oklahoma; 7 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 9, 2016, 2:36 PM CDT (19:36 UTC)
- Expired
- May 9, 2016, 9:46 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 52 counties
Crawford County, AR, Hempstead County, AR, Howard County, AR, Little River County, AR, Miller County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tulsa County, OK, Bowie County, TX, Cooke County, TX, Delta County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX, Red River County, TX
The radar
The Western Arkansas radar (KSRX), 174 km from the middle of the area, began a volume at 19:39 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
- 30%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
59 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 3:37 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Murray | 38 min |
| May 9, 3:55 PM CDT | Severe Thunderstorm Warning | OUN | Love, Marshall | 65 min |
| May 9, 4:05 PM CDT | Tornado Warning | OUN | Garvin, Murray | 25 min |
| May 9, 4:27 PM CDT | Tornado Warning | OUN | Garvin, Murray | 33 min |
| May 9, 4:31 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, Oklahoma, Pottawatomie | 44 min |
| May 9, 4:40 PM CDT | Tornado Warning | OUN | Cleveland, Pottawatomie | 50 min |
| May 9, 4:52 PM CDT | Tornado Warning | OUN | Garvin, Murray, Pontotoc | 23 min |
| May 9, 5:00 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Marshall | 45 min |
| May 9, 5:10 PM CDT | Tornado Warning | OUN | Bryan, Marshall | 35 min |
| May 9, 5:12 PM CDT | Tornado Warning | OUN | Murray, Pontotoc | 33 min |
| May 9, 5:18 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Logan, Payne | 57 min |
| May 9, 5:19 PM CDT | Tornado Warning | OUN | Atoka, Coal, Johnston | 26 min |
| May 9, 5:23 PM CDT | Tornado Warning | OUN | Cleveland, Pottawatomie | 37 min |
| May 9, 5:34 PM CDT | Tornado Warning | OUN | Bryan | 26 min |
| May 9, 5:41 PM CDT | Tornado Warning | OUN | Atoka, Coal | 34 min |
| May 9, 5:42 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Hughes, Pontotoc | 48 min |
| May 9, 5:52 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Pottawatomie, Seminole | 10 min |
| May 9, 5:57 PM CDT | Tornado Warning | OUN | Bryan | 33 min |
| May 9, 6:04 PM CDT | Severe Thunderstorm Warning | FWD | Fannin, Lamar | 56 min |
| May 9, 6:07 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 23 min |
| May 9, 6:09 PM CDT | Tornado Warning | OUN | Atoka, Coal | 36 min |
| May 9, 6:12 PM CDT | Tornado Warning | TSA | Choctaw | 48 min |
| May 9, 6:16 PM CDT | Tornado Warning | FWD | Fannin, Lamar | 29 min |
| May 9, 6:28 PM CDT | Tornado Warning | TSA | Pawnee | 32 min |
| May 9, 6:32 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 28 min |
| May 9, 6:36 PM CDT | Tornado Warning | FWD | Lamar | 54 min |
| May 9, 6:45 PM CDT | Tornado Warning | TSA | Pawnee | 19 min |
| May 9, 6:52 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 38 min |
| May 9, 6:53 PM CDT | Tornado Warning | TSA | Choctaw | 52 min |
| May 9, 6:59 PM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 61 min |
| May 9, 6:59 PM CDT | Tornado Warning | FWD | Lamar | 31 min |
| May 9, 7:08 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 49 min |
| May 9, 7:12 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 9 min |
| May 9, 7:27 PM CDT | Severe Thunderstorm Warning | OUN | Atoka | 18 min |
| May 9, 7:28 PM CDT | Severe Thunderstorm Warning | FWD | Lamar | 62 min |
| May 9, 7:43 PM CDT | Tornado Warning | TSA | Choctaw, Pushmataha | 13 min |
| May 9, 7:44 PM CDT | Flash Flood Warning | FWD | Lamar | 2 hr |
| May 9, 7:59 PM CDT | Severe Thunderstorm Warning | SHV | Little River, Sevier | 46 min |
| May 9, 8:00 PM CDT | Tornado Warning | SHV | Red River | 45 min |
| May 9, 8:05 PM CDT | Severe Thunderstorm Warning | TSA | Crawford, Franklin, Sebastian | 32 min |
| May 9, 8:08 PM CDT | Tornado Warning | FWD | Lamar | 37 min |
| May 9, 8:14 PM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 44 min |
| May 9, 8:24 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 36 min |
| May 9, 8:26 PM CDT | Severe Thunderstorm Warning | FWD | Lamar | 64 min |
| May 9, 8:33 PM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 57 min |
| May 9, 8:33 PM CDT | Tornado Warning | FWD | Lamar | 27 min |
| May 9, 8:43 PM CDT | Tornado Warning | SHV | Red River | 47 min |
| May 9, 8:44 PM CDT | Tornado Warning | FWD | Lamar | 16 min |
| May 9, 8:49 PM CDT | Severe Thunderstorm Warning | SHV | Little River | 56 min |
| May 9, 8:52 PM CDT | Tornado Warning | SHV | Little River | 53 min |
| May 9, 8:53 PM CDT | Severe Thunderstorm Warning | LZK | Polk | 22 min |
| May 9, 8:55 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 35 min |
| May 9, 8:57 PM CDT | Tornado Warning | SHV | Red River | 48 min |
| May 9, 9:09 PM CDT | Severe Thunderstorm Warning | SHV | Howard, Sevier | 36 min |
| May 9, 9:26 PM CDT | Flash Flood Warning | SHV | Little River | 3 hr |
| May 9, 9:26 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Washington | 34 min |
| May 9, 9:30 PM CDT | Tornado Warning | SHV | Little River | 45 min |
| May 9, 9:38 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard, Sevier | 52 min |
| May 9, 9:40 PM CDT | Severe Thunderstorm Warning | LZK | Clark, Pike | 50 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, 7.6 hours before the alert went out and 175 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
- 686 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 336 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 6.0
The text
As transmitted.
880
WWUS20 KWNS 091934
SEL5
SPC WW 091934
ARZ000-OKZ000-TXZ000-100200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 155
NWS STORM PREDICTION CENTER NORMAN OK
230 PM CDT MON MAY 9 2016
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* TORNADO WATCH FOR PORTIONS OF
WESTERN ARKANSAS
SOUTHERN AND EASTERN OKLAHOMA
PARTS OF NORTH CENTRAL TEXAS
* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
900 PM CDT.
* PRIMARY THREATS INCLUDE...
A FEW TORNADOES AND A COUPLE INTENSE TORNADOES POSSIBLE
SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS
TO 3 INCHES IN DIAMETER POSSIBLE
ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
SUMMARY...SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP NEAR THE I-35
CORRIDOR FROM SOUTH CENTRAL OKLAHOMA INTO NORTH CENTRAL TEXAS OVER
THE NEXT FEW HOURS. LARGE HAIL WILL BE COMMON WITH THIS ACTIVITY
AND A FEW TORNADOES...POSSIBLY STRONG...ARE EXPECTED LATER THIS
AFTERNOON. SUPERCELLS ARE EXPECTED TO SPREAD INTO SOUTHWESTERN
ARKANSAS THIS EVENING.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 30 MILES SOUTHWEST OF
ARDMORE OKLAHOMA TO 55 MILES EAST NORTHEAST OF DE QUEEN ARKANSAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).
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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 154...
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.
...DARROWSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 1:39 PM CDT | Mesoscale Discussion | SPC | Howard, Little River, Montgomery, Polk, Scott, Sebastian and 1 more | 66 min |
| May 9, 5:49 PM CDT | Mesoscale Discussion | SPC | Crawford, Hempstead, Howard, Little River, Montgomery, Pike and 4 more | 56 min |
| May 9, 6:38 PM CDT | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Conway, Craighead, Fulton and 13 more | 97 min |
| May 8, 7:01 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 16 more | 89 min |
| May 9, 2:39 AM CDT | Mesoscale Discussion | SPC | Carter, Comanche, Cotton, Jefferson, Johnston, Love and 4 more | 3 hr |
| May 9, 1:46 PM CDT | Mesoscale Discussion | SPC | Adair, Alfalfa, Canadian, Cherokee, Craig, Creek and 22 more | 59 min |
| May 9, 2:07 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Alfalfa, Blaine, Canadian, Cherokee, Cleveland and 31 more | 10 hr |
| May 9, 5:29 PM CDT | Mesoscale Discussion | SPC | Adair, Alfalfa, Blaine, Caddo, Canadian, Cherokee and 35 more | 61 min |
| May 8, 8:01 PM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coke, Coleman, Concho, Cooke and 29 more | 89 min |
| May 9, 5:13 PM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Camp, Cass, Cherokee, Ellis and 25 more | 92 min |
Nearby
Tornado Watches in Oklahoma, 2016Tornado Watches in Arkansas, 2016Tornado Watches in Texas, 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.