Alert archive / Wisconsin / Mesoscale Discussions in 2003

Mesoscale Discussion 34

January 30, 200314 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jan 30, 2003, 11:16 PM CST for 14 counties in Wisconsin. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Jan 30, 2003, 11:16 PM CST (05:16 UTC)
Expired: Jan 31, 2003, 8:15 AM CST
In force: 9 hr
Issued by: the Storm Prediction Center

Counties Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Marquette County, WI, Richland County, WI, Sauk County, WI, Washington County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 84 km from the middle of the area, began a volume at 05:19 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 5.3 hours before the alert went out and 169 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: 987 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 186 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.

891 
ACUS11 KWNS 310517
SWOMCD
SPC MCD 310516 
WIZ000-311415-

MESOSCALE DISCUSSION 0034
NWS STORM PREDICTION CENTER NORMAN OK
1116 PM CST THU JAN 30 2003

AREAS AFFECTED...PORTIONS OF SRN/CENTRAL WI

CONCERNING...HEAVY SNOW 

VALID 310516Z - 311415Z

HEAVY SNOW WITH HOURLY ACCUMULATION RATES NEAR 1 INCH WILL
DEVELOP FROM SWRN WI NEWD INTO E-CENTRL WI THROUGH 30/09Z. A
NARROW (30-40 MI) AXIS OF 4-5 INCHES TOTAL SNOWFALL WILL BE
POSSIBLE FROM NEAR VOK NEWD TO NEAR MTW BEFORE THE SNOW ENDS
AFTER 31/12Z. 



RECENT WV IMAGERY SUGGESTS THAT 80-90 KT MID LEVEL JET MAX OVER
THE CENTRAL PLNS WILL CONTINUE TO AID IN MID LEVEL LOW CENTER
INTENSIFICATION OVER NRN MO/SRN IA OVER THE NEXT FEW HOURS. MID
LEVEL DEFORMATION ZONE ON THE NRN PERIPHERY OF THIS MID LEVEL LOW
CENTER WILL CONTINUE TO DEVELOP FROM NERN IA NEWD INTO CENTRAL
WI. STRONG MID LEVEL LIFT ASSOCIATED WITH INCREASING
FRONTOGENESIS WILL OCCUR IN THE 600-700 MB LAYER WHERE THERMAL
PROFILE WILL FAVOR DENDRITIC SNOW CRYSTAL GROWTH. LOW LEVEL
AIRMASS PER 00Z DVN/GRB SOUNDINGS SUGGESTS THAT SNOW DEVELOPMENT
HAS BEEN DELAYED DUE TO RELATIVELY DRY LOW LEVEL AIRMASS.
HOWEVER...STRONG /40-50 KT/ LOW LEVEL JET PER REGIONAL
VWP/PROFILERS WILL CONTINUE TO SUPPORT STRONG ISENTROPIC
LIFT/SATURATION OF LOWEST FEW THOUSAND FEET. THUS...HEAVY SNOW
WILL QUICKLY DEVELOP FROM SWRN INTO E-CENTRAL WI THROUGH 31/09Z.



..CROSBIE.. 01/31/2003

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

42819089 42838813 43808775 44128819 43549096

Nearby

Mesoscale Discussions in Wisconsin, 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.