Alert archive / Oklahoma / Mesoscale Discussions in 2012

Mesoscale Discussion 544

April 15, 201219 counties in Kansas; 12 counties in Missouri; 20 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2012, 4:32 AM CDT for 19 counties in Kansas; 12 counties in Missouri; 20 counties in Oklahoma. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Apr 15, 2012, 4:32 AM CDT (09:32 UTC)
Expired
Apr 15, 2012, 6:00 AM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 51 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Coffey County, KS, Crawford County, KS, Douglas County, KS, Franklin County, KS, Johnson County, KS, Labette County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Bates County, MO, Buchanan County, MO, Caldwell County, MO, Cass County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Jackson County, MO, Lafayette County, MO, Platte County, MO, Ray County, MO, Vernon County, MO, Cleveland County, OK, Craig County, OK, Creek County, OK, Hughes County, OK, Lincoln County, OK, Mayes County, OK, McIntosh County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 137 km from the middle of the area, began a volume at 09:34 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 9.5 hours before the alert went out and 161 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, Springfield, MO at 00:00Z on 2012-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 532 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, Springfield, MO at 00:00Z on 2012-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 294 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
532 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
1275 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
294 m²/s²
0-3 km storm-relative helicity
443 m²/s²
Significant tornado parameter
0.1
Supercell composite
3.5

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 14, 7:15 PM CDTMesoscale DiscussionSPCButler, Chase, Dickinson, Geary, Harper, Harvey and 7 more60 min
Apr 14, 10:37 PM CDTMesoscale DiscussionSPCButler, Chase, Clay, Coffey, Dickinson, Douglas and 19 more83 min
Apr 14, 11:48 PM CDTMesoscale DiscussionSPCCoffey, Douglas, Franklin, Johnson, Leavenworth, Lyon and 2 more87 min
Apr 15, 1:37 AM CDTTornado WatchSPCAtchison, Brown, Butler, Chase, Chautauqua, Coffey and 26 more5 hr
Apr 15, 6:35 AM CDTMesoscale DiscussionSPCCherokee, Crawford, Labette85 min
Apr 15, 6:38 AM CDTSevere Thunderstorm WatchSPCCherokee4 hr
Apr 14, 11:28 PM CDTMesoscale DiscussionSPCPutnam92 min
Apr 15, 9:25 AM CDTMesoscale DiscussionSPCBarry, Christian, Douglas, Greene, Howell, Laclede and 7 more95 min
Apr 15, 10:51 AM CDTTornado WatchSPCBarry, Camden, Christian, Crawford, Dallas, Dent and 19 more7 hr
Apr 15, 1:38 PM CDTMesoscale DiscussionSPCChristian, Crawford, Dent, Douglas, Howell, Laclede and 9 more97 min
Apr 15, 4:22 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 23 more83 min
Apr 15, 4:42 PM CDTTornado WatchSPCAudrain, Boone, Butler, Callaway, Carter, Cole and 35 more6 hr
Apr 14, 10:29 PM CDTSevere Thunderstorm WatchSPCComanche, Cotton, Tillman6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Missouri, 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.