Alert archive / Indiana / Mesoscale Discussions in 2012

Mesoscale Discussion 1194

June 16, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2012, 10:30 PM CDT for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Jun 16, 2012, 10:30 PM CDT (03:30 UTC)
Expired
Jun 17, 2012, 12:00 AM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 79 counties

Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Iroquois County, IL, Jasper County, IL, Jefferson County, IL, Kankakee County, IL, Macon County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Shelby County, IL, Vermilion County, IL, Washington County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hendricks County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Noble County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Putnam County, IN, Saint Joseph County, IN, Starke County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Cass County, MI, Saint Joseph County, MI, City of Saint Louis, MO, Franklin County, MO, Jefferson County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO

The radar

The Lincoln radar (KILX), 96 km from the middle of the area, began a volume at 03:30 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

Lincoln, IL (KILX), launched 00:00Z, 3.5 hours before the alert went out and 39 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, Lincoln, IL at 00:00Z on 2012-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1606 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, Lincoln, IL at 00:00Z on 2012-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.1939Sfc1 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
1606 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
1612 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

917 
ACUS11 KWNS 170331
SWOMCD
SPC MCD 170330
INZ000-MIZ000-ILZ000-MOZ000-170500-

MESOSCALE DISCUSSION 1194
NWS STORM PREDICTION CENTER NORMAN OK
1030 PM CDT SAT JUN 16 2012

AREAS AFFECTED...NRN AND CNTRL IL INTO E CNTRL MO

CONCERNING...SEVERE THUNDERSTORM WATCH 402...403...

VALID 170330Z - 170500Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
402...403...CONTINUES.

SUMMARY...ADDITIONAL WWS ARE NOT ANTICIPATED.  WWS 402 AND 403 MAY
BE CANCELLED EARLY.

DISCUSSION...GIVEN THE RELATIVELY MODEST TO WEAK STRENGTH OF THE
SYSTEM RELATIVE INFLOW...AND CONTINUED COOLING OF THE INFLOW SOURCE
REGION...CONSIDERABLE WEAKENING OF THE MESOSCALE CONVECTIVE SYSTEM
HAS OCCURRED DURING THE PAST HOUR OR SO.  THERE APPEARS LITTLE
SUPPORT FOR RE-INTENSIFICATION...AND MORE RAPID DISSIPATION OF
ACTIVITY APPEARS POSSIBLE AS IT PROGRESSES EASTWARD THROUGH 04-06Z.

..KERR.. 06/17/2012

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

ATTN...WFO...IWX...GRR...IND...PAH...LOT...ILX...LSX...

LAT...LON   38319151 39019020 39978908 41008811 41508766 42028670
            42108538 41438510 40378569 39238703 38098904 37619023
            38319151

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 16, 7:58 PM CDTMesoscale DiscussionSPCBond, Calhoun, Champaign, Christian, Clinton, Coles and 34 more92 min
Jun 16, 8:23 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Cass, Champaign, Christian, Clark and 38 more3 hr
Jun 17, 5:34 PM CDTMesoscale DiscussionSPCCalhoun, Jersey86 min
Jun 16, 11:03 PM CDTMesoscale DiscussionSPCBenton, Camden, Dallas, Dent, Henry, Hickory and 7 more87 min
Jun 17, 2:54 AM CDTMesoscale DiscussionSPCBarton, Cedar, Dade, Polk, Vernon3 hr

Nearby

Mesoscale Discussions in Indiana, 2012Mesoscale Discussions in Illinois, 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.