Alert archive / Oklahoma / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 319

May 29, 201217 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at May 29, 2012, 7:33 PM CDT for 17 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 29, 2012, 7:33 PM CDT (00:33 UTC)
Expired
May 30, 2012, 1:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt

Counties Choctaw County, OK, Creek County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 57 km from the middle of the area, began a volume at 00:35 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
50%
One or more gusts of 65 knots or more
30%
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
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 29, 7:49 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee41 min
May 29, 8:17 PM CDTSevere Thunderstorm WarningTSAOsage43 min
May 29, 8:25 PM CDTSevere Thunderstorm WarningTSAOsage35 min
May 29, 8:30 PM CDTSevere Thunderstorm WarningTSACreek, Okmulgee, Tulsa45 min
May 29, 8:40 PM CDTSevere Thunderstorm WarningTSACreek, Okfuskee, Okmulgee50 min
May 29, 8:44 PM CDTSevere Thunderstorm WarningTSAOsage46 min
May 29, 8:55 PM CDTSevere Thunderstorm WarningTSACreek, Tulsa28 min
May 29, 8:57 PM CDTSevere Thunderstorm WarningTSAMuskogee, Okmulgee, Tulsa, Wagoner48 min
May 29, 9:18 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee, Okfuskee, Okmulgee27 min
May 29, 10:22 PM CDTSevere Thunderstorm WarningTSALatimer, McIntosh, Pittsburg53 min
May 29, 10:52 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, McIntosh, Pittsburg68 min
May 29, 11:21 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore, Pittsburg, Pushmataha54 min
May 29, 11:38 PM CDTSevere Thunderstorm WarningTSAChoctaw, Latimer, Pittsburg, Pushmataha67 min
May 30, 12:31 AM CDTSevere Thunderstorm WarningTSAChoctaw, Pushmataha59 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, 0.6 hours before the alert went out and 144 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2012-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2199 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2012-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2199 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1607 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.5
Supercell composite
6.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 29, 8:21 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 32 more54 min
May 29, 9:10 PM CDTMesoscale DiscussionSPCAtoka, Canadian, Carter, Cleveland, Coal, Garvin and 10 more95 min
May 29, 11:28 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cleveland, Coal and 17 more62 min
May 30, 12:43 AM CDTSevere Thunderstorm WatchSPCMcCurtain7 hr
May 30, 2:43 AM CDTMesoscale DiscussionSPCCotton, Tillman92 min
May 30, 3:38 PM CDTTornado WatchSPCBeaver, Harmon5 hr
May 30, 5:47 PM CDTMesoscale DiscussionSPCBeckham, Blaine, Comanche, Custer, Dewey, Ellis and 10 more88 min
May 30, 6:13 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Carter and 37 more8 hr

Nearby

Severe Thunderstorm Watches in Oklahoma, 2012Every severe thunderstorm 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.