Alert archive / Indiana / Mesoscale Discussions in 2014

Mesoscale Discussion 4

January 5, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jan 5, 2014, 9:42 AM CST for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jan 5, 2014, 9:42 AM CST (15:42 UTC)
Expired: Jan 5, 2014, 2:45 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 88 counties

Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Iroquois County, IL, Jasper County, IL, Jersey County, IL, Kankakee County, IL, Macon County, IL, Macoupin 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, Saint Clair County, IL, Sangamon County, IL, Shelby County, IL, Vermilion County, IL, Washington County, IL, Allen County, IN, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Elkhart County, IN, Fountain County, IN, Fulton 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, Steuben 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, Branch County, MI, Calhoun County, MI, Cass County, MI, Kalamazoo County, MI, Saint Joseph County, MI, City of Saint Louis, MO, Crawford County, MO, Franklin County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Phelps County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The Indianapolis radar (KIND), 103 km from the middle of the area, began a volume at 15:44 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 12:00Z, 3.7 hours before the alert went out and 120 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 436 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

683 
ACUS11 KWNS 051543
SWOMCD
SPC MCD 051542 
MIZ000-INZ000-ILZ000-MOZ000-052045-

MESOSCALE DISCUSSION 0004
NWS STORM PREDICTION CENTER NORMAN OK
0942 AM CST SUN JAN 05 2014

AREAS AFFECTED...ECNTRL MO INTO SCNTRL THROUGH NERN IL...CNTRL AND
NRN IND AND SWRN LOWER MI

CONCERNING...HEAVY SNOW 

VALID 051542Z - 052045Z

SUMMARY...BANDS OF MODERATE TO HEAVY SNOW WILL DEVELOP NEWD THROUGH
THE UPPER MIDWEST AND SRN GREAT LAKES FROM ECNTRL MO THROUGH CNTRL
AND NERN IL INTO CNTRL AND NRN IND AND SWRN LOWER MI. SNOWFALL RATES
LOCALLY UP TO 1-1.5 INCHES PER HOUR WILL REMAIN POSSIBLE INTO THE
AFTERNOON.

DISCUSSION...THIS MORNING A QUASI-STATIONARY FRONT /DEMARCATING THE
LEADING EDGE OF AN INTRUSION OF ARCTIC AIR/ EXTENDS FROM A SURFACE
LOW IN NERN AR THROUGH SERN MO...SRN IL...NRN IND AND SERN LOWER MI.
THE SFC LOW SHOULD DEEPEN AS IT DEVELOPS NEWD ALONG THE
FRONT...REACHING THE OH VALLEY LATER TODAY IN RESPONSE TO FORCING
WITHIN EXIT REGION OF AN UPPER JET ROTATING THROUGH BASE OF THE
SYNOPTIC TROUGH. THE SLY LOW LEVEL JET WILL STRENGTHEN TO NEAR 70 KT
ACROSS THE TN AND OH VALLEYS...LIKELY AUGMENTING FRONTOGENETIC
FORCING AND ISENTROPIC ASCENT WITHIN BAROCLINIC ZONE EXTENDING FROM
CNTRL MO NEWD INTO SRN LOWER MI. SUB-ZERO VERTICAL TEMPERATURE
PROFILES NORTH OF THE FRONT WILL PROMOTE SNOW WITH RATES AUGMENTED
BY FRONTOGENETIC FORCING AND LOW STATIC STABILITY IN THE 700-500 MB
LAYER. RATES COULD LOCALLY EXCEED 1 INCH PER HOUR WITHIN THE HEAVIER
BANDS.

..DIAL.. 01/05/2014

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

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

LAT...LON   41188494 39838648 37449038 37759215 42178669 42598480
            41188494

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 5, 3:16 AM CST	Mesoscale Discussion	SPC	Calhoun, Jersey, Monroe	6 hr
Jan 5, 2:49 PM CST	Mesoscale Discussion	SPC	Clark, Coles, Crawford, Cumberland, Edgar, Edwards and 5 more	4 hr

Nearby

Mesoscale Discussions in Indiana, 2014 Mesoscale Discussions in Illinois, 2014 Mesoscale Discussions in Missouri, 2014 Every mesoscale discussion in 2014

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.