Alert archive / Missouri / Mesoscale Discussions in 2012

Mesoscale Discussion 377

March 28, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2012, 11:21 PM CDT for 4 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Mar 28, 2012, 11:21 PM CDT (04:21 UTC)
Expired
Mar 29, 2012, 12:45 AM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 80 counties

Adams County, IA, Cass County, IA, Decatur County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wayne County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Nemaha County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Audrain County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Howard County, MO, Knox County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Moniteau County, MO, Monroe County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Hamilton County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Washington County, NE, York County, NE

The radar

The Pleasant Hill radar (KEAX), 159 km from the middle of the area, began a volume at 04:21 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

Topeka, KS (KTOP), launched 00:00Z, 4.4 hours before the alert went out and 151 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, Topeka, KS at 00:00Z on 2012-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1317 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, Topeka, KS at 00:00Z on 2012-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.193958Sfc1 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
1317 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1400 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.5
Supercell composite
6.6

Open this sounding in Storm Lab

The text

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

259 
ACUS11 KWNS 290422
SWOMCD
SPC MCD 290421
MOZ000-IAZ000-KSZ000-NEZ000-290545-

MESOSCALE DISCUSSION 0377
NWS STORM PREDICTION CENTER NORMAN OK
1121 PM CDT WED MAR 28 2012

AREAS AFFECTED...SERN NEB...SRN IA...NWRN MO

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 290421Z - 290545Z

A BAND OF THUNDERSTORMS CURRENTLY EXTENDS FROM SERN NEB INTO CNTRL
MO...ORIENTED ALONG A ZONE OF ISENTROPIC LIFT WITH A SWLY LOW LEVEL
JET. A FEW CORES APPEAR TO CONTAIN HAIL NEAR 1.00 INCH
DIAMETER...BUT MOSTLY SMALL HAIL WILL BE LIKELY. THESE STORMS MAY
PERSIST THROUGH MUCH OF THE NIGHT...AND COULD WEAKEN AS THEY DRIFT
NEWD INTO SRN IA FARTHER AWAY FROM THE GREATER INSTABILITY.

..JEWELL.. 03/29/2012

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

ATTN...WFO...LSX...DMX...EAX...OAX...TOP...GID...

LAT...LON   38399195 39349485 40009694 40339801 40799845 41289849
            41619779 41629695 41549540 40849355 40429257 39909176
            39339151 38969148 38399195

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 29, 5:10 PM CDTTornado WatchSPCFremont, Mills, Montgomery, Page6 hr
Mar 29, 6:58 PM CDTMesoscale DiscussionSPCFremont, Mills, Montgomery, Page62 min
Mar 28, 7:53 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Clay and 24 more2 hr
Mar 28, 8:17 PM CDTSevere Thunderstorm WatchSPCAllen, Greenwood, Woodson4 hr
Mar 29, 4:50 PM CDTMesoscale DiscussionSPCBarber, Comanche, Dickinson, Harper, Harvey, Kingman and 6 more55 min
Mar 29, 4:54 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Marshall, Nemaha and 2 more36 min
Mar 29, 5:30 PM CDTSevere Thunderstorm WatchSPCBarber, Butler, Chase, Coffey, Cowley, Douglas and 13 more8 hr
Mar 29, 11:53 AM CDTMesoscale DiscussionSPCCaldwell, Carroll, Chariton, Daviess, Grundy, Howard and 5 more97 min

Nearby

Mesoscale Discussions in Missouri, 2012Mesoscale Discussions in Nebraska, 2012Mesoscale Discussions in Iowa, 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.