Alert archive / Oklahoma / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 293

May 12, 20115 states

The Storm Prediction Center issued this severe thunderstorm watch at May 12, 2011, 3:17 PM CDT for 5 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: May 12, 2011, 3:17 PM CDT (20:17 UTC)
Expired: May 12, 2011, 10:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 60 kt

All 102 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Conway County, AR, Crawford County, AR, Franklin County, AR, Fulton County, AR, Howard County, AR, Izard County, AR, Johnson County, AR, Little River County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Polk County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Barry County, MO, Barton County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Hickory County, MO, Howell County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Morgan County, MO, Newton County, MO, Ozark County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Vernon County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Cooke County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX, Montague County, TX, Red River County, TX

The radar

The Tulsa radar (KINX), 70 km from the middle of the area, began a volume at 20:16 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: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 30%
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: 20%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

99 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 12, 4:04 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	41 min
May 12, 4:31 PM CDT	Severe Thunderstorm Warning	SGF	Crawford	44 min
May 12, 4:34 PM CDT	Severe Thunderstorm Warning	SGF	Barton, Dade, Jasper	56 min
May 12, 4:40 PM CDT	Severe Thunderstorm Warning	SGF	Douglas	36 min
May 12, 4:41 PM CDT	Severe Thunderstorm Warning	TSA	Craig	64 min
May 12, 4:43 PM CDT	Severe Thunderstorm Warning	SGF	Bourbon	47 min
May 12, 4:50 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	40 min
May 12, 4:51 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	39 min
May 12, 4:54 PM CDT	Severe Thunderstorm Warning	SGF	Cedar	66 min
May 12, 4:56 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	34 min
May 12, 5:01 PM CDT	Severe Thunderstorm Warning	SGF	Wright	44 min
May 12, 5:08 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	52 min
May 12, 5:12 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	63 min
May 12, 5:17 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie, Seminole	58 min
May 12, 5:17 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	58 min
May 12, 5:19 PM CDT	Severe Thunderstorm Warning	SGF	Cherokee	56 min
May 12, 5:21 PM CDT	Tornado Warning	SGF	Cedar, Dade, Polk	54 min
May 12, 5:21 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	33 min
May 12, 5:24 PM CDT	Severe Thunderstorm Warning	SGF	Benton, St. Clair	66 min
May 12, 5:24 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Dallas, Laclede	51 min
May 12, 5:24 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Haskell, McIntosh, Muskogee, Sequoyah	51 min
May 12, 5:25 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	50 min
May 12, 5:26 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Pontotoc, Pottawatomie	64 min
May 12, 5:27 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee	48 min
May 12, 5:36 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	24 min
May 12, 5:39 PM CDT	Severe Thunderstorm Warning	TSA	Crawford	51 min
May 12, 5:43 PM CDT	Severe Thunderstorm Warning	SGF	St. Clair	48 min
May 12, 5:44 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	46 min
May 12, 5:45 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Sequoyah	45 min
May 12, 5:53 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Miller, Morgan	52 min
May 12, 5:56 PM CDT	Severe Thunderstorm Warning	TSA	Crawford	64 min
May 12, 5:56 PM CDT	Severe Thunderstorm Warning	SGF	Jasper	64 min
May 12, 5:56 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee, Tulsa, Wagoner	49 min
May 12, 6:00 PM CDT	Severe Thunderstorm Warning	SGF	Dallas, Hickory	60 min
May 12, 6:00 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	45 min
May 12, 6:01 PM CDT	Tornado Warning	SGF	Cherokee	59 min
May 12, 6:01 PM CDT	Severe Thunderstorm Warning	SGF	Laclede, Wright	30 min
May 12, 6:06 PM CDT	Severe Thunderstorm Warning	SGF	Benton, Morgan	39 min
May 12, 6:07 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	38 min
May 12, 6:11 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, LeFlore, Muskogee, Sequoyah	64 min
May 12, 6:13 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	47 min
May 12, 6:14 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	31 min
May 12, 6:15 PM CDT	Tornado Warning	SGF	Polk	45 min
May 12, 6:15 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Muskogee, Rogers, Tulsa, Wagoner	45 min
May 12, 6:17 PM CDT	Severe Thunderstorm Warning	SGF	Newton	58 min
May 12, 6:18 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	42 min
May 12, 6:23 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Laclede, Maries, Miller, Pulaski	43 min
May 12, 6:23 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	52 min
May 12, 6:25 PM CDT	Severe Thunderstorm Warning	SGF	Barton, Dade	49 min
May 12, 6:30 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	45 min
May 12, 6:37 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	53 min
May 12, 6:37 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Laclede	38 min
May 12, 6:40 PM CDT	Severe Thunderstorm Warning	OUN	Seminole	50 min
May 12, 6:41 PM CDT	Severe Thunderstorm Warning	SGF	Miller, Morgan	49 min
May 12, 6:47 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	28 min
May 12, 6:50 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	24 min
May 12, 6:52 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	28 min
May 12, 6:54 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	36 min
May 12, 6:56 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Dallas, Hickory	37 min
May 12, 6:57 PM CDT	Severe Thunderstorm Warning	SGF	Jasper	48 min
May 12, 6:58 PM CDT	Severe Thunderstorm Warning	SGF	Cedar	42 min
May 12, 7:00 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	42 min
May 12, 7:08 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian, Washington	67 min
May 12, 7:11 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Miller	49 min
May 12, 7:12 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	20 min
May 12, 7:15 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	26 min
May 12, 7:16 PM CDT	Severe Thunderstorm Warning	SGF	Benton, Camden, Morgan	44 min
May 12, 7:22 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes	38 min
May 12, 7:23 PM CDT	Severe Thunderstorm Warning	LZK	Boone	67 min
May 12, 7:26 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Newton	64 min
May 12, 7:28 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes	47 min
May 12, 7:30 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Morgan	45 min
May 12, 7:31 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Dallas, Hickory	19 min
May 12, 7:33 PM CDT	Severe Thunderstorm Warning	SGF	Polk	45 min
May 12, 7:35 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	23 min
May 12, 7:43 PM CDT	Severe Thunderstorm Warning	LZK	Marion, Searcy	47 min
May 12, 7:43 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Pontotoc	62 min
May 12, 7:46 PM CDT	Severe Thunderstorm Warning	OUN	Love	33 min
May 12, 7:52 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Dallas, Hickory	38 min
May 12, 7:56 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Newton	34 min
May 12, 7:58 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Marion	52 min
May 12, 8:05 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Marion, Newton, Searcy	40 min
May 12, 8:07 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Marion, Searcy	38 min
May 12, 8:09 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Johnston, Murray, Pontotoc	51 min
May 12, 8:24 PM CDT	Severe Thunderstorm Warning	SGF	Christian, Greene	26 min
May 12, 8:25 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Miller	35 min
May 12, 8:30 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Dallas	45 min
May 12, 8:34 PM CDT	Severe Thunderstorm Warning	SGF	Dallas, Polk, Webster	36 min
May 12, 8:35 PM CDT	Flash Flood Warning	TSA	Crawford, Sebastian	4 hr
May 12, 8:42 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Marion	63 min
May 12, 8:42 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Ozark, Taney	63 min
May 12, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	68 min
May 12, 8:55 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Laclede, Maries, Miller, Phelps, Pulaski	65 min
May 12, 8:58 PM CDT	Flash Flood Warning	LZK	Johnson, Newton	3 hr
May 12, 9:18 PM CDT	Severe Thunderstorm Warning	SGF	Laclede, Phelps, Texas, Wright	57 min
May 12, 9:20 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Fulton	25 min
May 12, 9:28 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Howell, Ozark	62 min
May 12, 9:40 PM CDT	Severe Thunderstorm Warning	LZK	Fulton, Izard, Sharp	65 min
May 12, 9:56 PM CDT	Severe Thunderstorm Warning	SGF	Laclede, Maries, Miller, Phelps, Pulaski	64 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

Springfield, MO (KSGF), launched 12:00Z, 8.3 hours before the alert went out and 148 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1317 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 7:43 PM CDT	Mesoscale Discussion	SPC	Clark, Conway, Faulkner, Garland, Hempstead, Hot Spring and 12 more	62 min
May 12, 1:46 PM CDT	Mesoscale Discussion	SPC	Benton, Crawford, Franklin, Madison, Sebastian, Washington	119 min
May 12, 6:30 PM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Johnson and 8 more	90 min
May 11, 7:51 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Norton, Rawlins, Sherman, Thomas	84 min
May 11, 8:16 PM CDT	Mesoscale Discussion	SPC	Brown, Nemaha	59 min
May 12, 2:37 PM CDT	Tornado Watch	SPC	Cloud, Jewell, Mitchell, Phillips, Republic, Smith and 1 more	7 hr
May 12, 4:54 PM CDT	Mesoscale Discussion	SPC	Atchison, Douglas, Jefferson, Johnson, Leavenworth, Linn and 2 more	66 min
May 12, 5:31 PM CDT	Severe Thunderstorm Watch	SPC	Linn, Miami	6 hr
May 11, 11:25 PM CDT	Mesoscale Discussion	SPC	Austin, Bandera, Bastrop, Bexar, Brazos, Burleson and 27 more	65 min
May 12, 2:57 AM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bastrop, Bexar, Blanco, Caldwell and 25 more	33 min
May 12, 3:18 AM CDT	Severe Thunderstorm Watch	SPC	Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 7 more	5 hr
May 12, 7:27 AM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bee, Bexar, Brooks, Dimmit and 26 more	33 min
May 12, 7:52 AM CDT	Severe Thunderstorm Watch	SPC	Aransas, Atascosa, Bandera, Bee, Bexar, Brooks and 33 more	9 hr
May 12, 8:46 AM CDT	Mesoscale Discussion	SPC	Bastrop, Bell, Bosque, Brazos, Burleson, Caldwell and 22 more	59 min
May 12, 9:02 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Austin, Bastrop, Bell, Blanco, Bosque and 53 more	6 hr
May 12, 11:43 AM CDT	Mesoscale Discussion	SPC	Anderson, Aransas, Austin, Bee, Brazos, Burleson and 33 more	92 min

Nearby

Severe Thunderstorm Watches in Oklahoma, 2011 Severe Thunderstorm Watches in Missouri, 2011 Severe Thunderstorm Watches in Arkansas, 2011 Every severe thunderstorm watch in 2011

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.