Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 32

January 28, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jan 28, 2003, 5:41 PM CST for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jan 28, 2003, 5:41 PM CST (23:41 UTC)
Expired: Jan 28, 2003, 10:45 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 59 counties

Appanoose County, IA, Davis County, IA, Des Moines County, IA, Henry County, IA, Lee County, IA, Van Buren County, IA, Bureau County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Iroquois County, IL, Kankakee County, IL, Knox County, IL, LaSalle County, IL, Livingston County, IL, Marshall County, IL, McDonough County, IL, McLean County, IL, Mercer County, IL, Peoria County, IL, Putnam County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Will County, IL, Woodford County, IL, Allen County, IN, Benton County, IN, Carroll County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton 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, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Wabash County, IN, White County, IN, Whitley County, IN, Adair County, MO, Clark County, MO, Knox County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO

The radar

The Lincoln radar (KILX), 89 km from the middle of the area, began a volume at 23:45 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, 11.7 hours before the alert went out and 82 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: 969 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 199 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.

327 
ACUS11 KWNS 282342
SWOMCD
SPC MCD 282341 
IAZ000-MOZ000-ILZ000-INZ000-290445-

MESOSCALE DISCUSSION 0032
NWS STORM PREDICTION CENTER NORMAN OK
0541 PM CST TUE JAN 28 2003

AREAS AFFECTED...FAR SERN IA...FAR NERN MO...N-CENTRAL IL...AND
NRN IND

CONCERNING...PRECIPITATION TRENDS...WINTER PRECIPITATION 

VALID 282341Z - 290445Z

A NARROW ZONE OF BANDED PRECIPITATION EXTENDING FROM THE MO/IA
BORDER ENEWD ACROSS N-CENTRAL IL AND NRN IND WILL BE ASSOCIATED
WITH BRIEF PERIODS OF HEAVY SNOWFALL THROUGH THIS EVENING AND
INTO THE OVERNIGHT HOURS. THE BAND IS EXPECTED TO TRANSLATE
SLOWLY ESEWD THROUGH 29/06Z. 



AT 28/23Z...A SURFACE COLD FRONT EXTENDS FROM NRN OK NEWD TO STL
TO NWRN IND. PRECIPITATION IS FOCUSED NORTH OF THE SURFACE
BOUNDARY...WITHIN 700MB CONFLUENT FLOW REGION IN ADVANCE OF
POSITIVELY TILTED SHORTWAVE TROUGH ACROSS THE CENTRAL PLAINS. THE
CONFLUENT FLOW WILL CONTINUE TO ENHANCE HORIZONTAL TEMPERATURE
GRADIENT RESULTING IN A NARROW FRONTOGENETICALLY FORCED REGION OF
PRECIPITATION ACROSS THE DISCUSSION AREA. ETA FORECAST SOUNDINGS
ACROSS CENTRAL IL THIS EVENING INDICATE SATURATED LAYER EXTENDING
UP THROUGH FAVORABLE DENDRITE GROWTH LAYER /-12 TO -16C/ WHICH
MAY FURTHER ENHANCE PRECIPITATION EFFICIENCY WITHIN THE AXIS OF
MESOSCALE ASCENT. 



FRONTAL ZONE CONTINUES TO GRADUALLY MOVE SEWD...WHICH SHOULD
RESULT IN PRECIPITATION BANDS EXHIBITING A SEWD COMPONENT OF
MOTION ACROSS NERN MO AND N-CENTRAL IL DURING THE NEXT SEVERAL
HOURS. THE BAND WILL LIKELY EXTEND EWD INTO NRN IND THIS EVENING.
HEAVY SNOW LASTING FOR UP TO 1-3 HOURS IS LIKELY AS STRONGEST UVV
ASSOCIATED WITH FRONTOGENETIC FORCING TRACKS ESEWD ACROSS THE
DISCUSSION AREA. 



..BANACOS.. 01/28/2003

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

40209065 40468791 40568636 40748549 41178488 41658507
41698699 41558873 41389000 40899232 40759301 39979306

Nearby

Mesoscale Discussions in Indiana, 2003 Mesoscale Discussions in Illinois, 2003 Mesoscale Discussions in Iowa, 2003 Every mesoscale discussion in 2003

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.