Alert archive / Illinois / Mesoscale Discussions in 2004

Mesoscale Discussion 33

January 25, 200434 counties in Illinois; 18 counties in Indiana; 13 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jan 25, 2004, 7:46 AM CST for 34 counties in Illinois; 18 counties in Indiana; 13 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jan 25, 2004, 7:46 AM CST (13:46 UTC)
Expired: Jan 25, 2004, 1:45 PM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 65 counties

Bond County, IL, Calhoun County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Perry County, IL, Pike County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Scott County, IL, Shelby County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, Bartholomew County, IN, Brown County, IN, Clay County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Greene County, IN, Jackson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Orange County, IN, Owen County, IN, Ripley County, IN, Sullivan County, IN, Vigo County, IN, Audrain County, MO, City of Saint Louis, MO, Franklin County, MO, Jefferson County, MO, Lincoln County, MO, Montgomery County, MO, Pike County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO

The radar

The Lincoln radar (KILX), 123 km from the middle of the area, began a volume at 13:48 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, 1.8 hours before the alert went out and 117 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: 1852 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 241 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.

899 
ACUS11 KWNS 251347
SWOMCD
SPC MCD 251346 
OHZ000-INZ000-ILZ000-MOZ000-251945-

MESOSCALE DISCUSSION 0033
NWS STORM PREDICTION CENTER NORMAN OK
0746 AM CST SUN JAN 25 2004

AREAS AFFECTED...ECENTRAL MO...CENTRAL/SRN IL AND PORTIONS OF
SRN/CENTRAL IND

CONCERNING...WINTER MIXED PRECIPITATION 

VALID 251346Z - 251945Z

A MIX OF FREEZING RAIN...SLEET AND SNOW WILL DEVELOP ENEWD FROM THE
STL METRO AREA/NERN MO INTO CENTRAL IND OVER THE NEXT 3-5 HOURS.
LIQUID EQUIVALENT ACCUMULATIONS BETWEEN 0.05 AND 0.10 IN./HR WILL BE
POSSIBLE ESPECIALLY ALONG A 30-50 MILE WIDE AXIS CENTERED FROM NEAR
STL EWD TO NEAR IND THROUGH 25/18Z.

MID LEVEL FRONTOGENESIS ALONG AN AXIS FROM ECENTRAL MO EWD INTO
CENTRAL IND WILL CONTINUE TO INTENSIFY AS MID LEVEL VORT MAX OVER
NRN AR MOVES NEWD INTO THE MS RIVER VALLEY. MODERATE TO AT TIMES
HEAVY FREEZING RAIN IS ANTICIPATED TO CONTINUE THROUGH 25/16Z OVER
CENTRAL MO. FARTHER EAST...LOW LEVEL ELEVATED WARM LAYER WILL
SUPPORT A MIX OF MODERATE FREEZING RAIN/SLEET GENERALLY ALONG AND
SOUTH OF A 40 W UIN TO IND LINE...WITH MODERATE TO HEAVY SNOW THE
PREDOMINANT PRECIP TYPE NORTH OF THIS LINE THROUGH 25/20Z.

..CROSBIE.. 01/25/2004

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

ATTN...WFO...ILN...LMK...IND...PAH...ILX...LSX...

39688850 39749093 39239186 37719094 38568642 39218461

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 24, 7:22 PM CST	Mesoscale Discussion	SPC	Alexander, Franklin, Jackson, Johnson, Massac, Monroe and 9 more	4 hr
Jan 25, 1:31 PM CST	Mesoscale Discussion	SPC	Bond, Calhoun, Cass, Champaign, Christian, Clark and 25 more	4 hr
Jan 25, 12:27 AM CST	Mesoscale Discussion	SPC	Clark, Crawford, Dubois, Floyd, Harrison, Orange and 6 more	6 hr

Nearby

Mesoscale Discussions in Illinois, 2004 Mesoscale Discussions in Indiana, 2004 Mesoscale Discussions in Missouri, 2004 Every mesoscale discussion in 2004

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.