Alert archive / Oklahoma / Mesoscale Discussions in 2012

Mesoscale Discussion 629

April 30, 2012Cherokee County, Kansas; 11 counties in Missouri; 21 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2012, 2:20 AM CDT for Cherokee County, Kansas; 11 counties in Missouri; 21 counties in Oklahoma. It was in force for 25 min.

The area

The outline as issued.

The facts

Issued
Apr 30, 2012, 2:20 AM CDT (07:20 UTC)
Expired
Apr 30, 2012, 2:45 AM CDT
In force
25 min
Issued by
the Storm Prediction Center
All 33 counties

Cherokee County, KS, Barton County, MO, Camden County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Hickory County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, Blaine County, OK, Craig County, OK, Creek County, OK, Custer County, OK, Delaware County, OK, Dewey County, OK, Garfield County, OK, Kingfisher 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, Roger Mills County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 91 km from the middle of the area, began a volume at 07:20 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.

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 7.3 hours before the alert went out and 107 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, Lamont, OK at 00:00Z on 2012-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2178 joules per kilogram.LCLEL10008507005003002001001 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, Lamont, OK at 00:00Z on 2012-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 square meters per square second.1939587897Sfc1 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
2178 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
761 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
1.0
Supercell composite
4.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

490 
ACUS11 KWNS 300720
SWOMCD
SPC MCD 300720 
MOZ000-ARZ000-OKZ000-KSZ000-TXZ000-300745-

MESOSCALE DISCUSSION 0629
NWS STORM PREDICTION CENTER NORMAN OK
0220 AM CDT MON APR 30 2012

AREAS AFFECTED...NRN OK/SERN KS/SWRN MO

CONCERNING...SEVERE THUNDERSTORM WATCH 205...207...

VALID 300720Z - 300745Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
205...207...CONTINUES.

OUTFLOW FROM ONGOING BAND OF STORMS EXTENDING FROM CENTRAL MO SWWD
ACROSS THE NRN HALF OF OK CONTINUES TO PUSH SOUTH OF THE ONGOING
CONVECTION...WITH WHAT APPEARS TO BE PRIMARILY A HEAVY RAIN THREAT
NOW ONGOING.

THOUGH AN OCCASIONAL STRONGER STORM -- POSSIBLY CAPABLE OF PRODUCING
MARGINAL HAIL OR GUSTY WINDS -- IS STILL POSSIBLE...IT APPEARS THAT
WW 205 WILL NOT REQUIRE EXTENSION/REISSUANCE.

..GOSS.. 04/30/2012

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...SGF...TSA...ICT...OUN...AMA...

LAT...LON   35590026 36739734 36959625 37269491 38119348 38049247
            35769533 35590026

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 29, 7:33 PM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Ford, Harper and 4 more87 min
Apr 29, 8:04 PM CDTSevere Thunderstorm WatchSPCAllen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 14 more7 hr
Apr 29, 10:31 PM CDTMesoscale DiscussionSPCAllen, Barber, Bourbon, Chautauqua, Cherokee, Comanche and 14 more119 min
Apr 30, 2:58 PM CDTMesoscale DiscussionSPCGrant, Haskell, Morton, Seward, Stanton, Stevens62 min
Apr 30, 3:36 PM CDTSevere Thunderstorm WatchSPCGrant, Haskell, Meade, Morton, Seward, Stanton and 1 more7 hr
Apr 30, 5:19 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Finney and 15 more56 min
Apr 30, 5:42 PM CDTTornado WatchSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 13 more7 hr
Apr 30, 6:55 PM CDTMesoscale DiscussionSPCAllen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 22 more2 hr
Apr 30, 12:03 PM CDTMesoscale DiscussionSPCCape Girardeau, Mississippi, Scott, Stoddard117 min
Apr 30, 12:38 AM CDTMesoscale DiscussionSPCRoger Mills37 min

Nearby

Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Missouri, 2012Mesoscale Discussions in Kansas, 2012Every mesoscale discussion 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.