Alert archive / Wisconsin / Mesoscale Discussions in 2004

Mesoscale Discussion 1249

June 13, 2004Gogebic County, Iron County, Michigan; 8 counties in Minnesota; 18 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2004, 3:29 PM CDT for Gogebic County, Iron County, Michigan; 8 counties in Minnesota; 18 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 13, 2004, 3:29 PM CDT (20:29 UTC)
Expired: Jun 13, 2004, 5:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 28 counties

Gogebic County, MI, Iron County, MI, Aitkin County, MN, Carlton County, MN, Chisago County, MN, Isanti County, MN, Kanabec County, MN, Mille Lacs County, MN, Pine County, MN, Sherburne County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Langlade County, WI, Lincoln County, WI, Oneida County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Taylor County, WI, Vilas County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 144 km from the middle of the area, began a volume at 20:33 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

Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 257 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: 9 J/kg
Mixed-layer CIN: -286 J/kg
Mixed-layer LCL: 1564 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 9 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.

893 
ACUS11 KWNS 132030
SWOMCD
SPC MCD 132029 
WIZ000-MIZ000-MNZ000-132230-

MESOSCALE DISCUSSION 1249
NWS STORM PREDICTION CENTER NORMAN OK
0329 PM CDT SUN JUN 13 2004

AREAS AFFECTED...ERN MN...NRN WI...AND WRN UPPER MI

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 132029Z - 132230Z

ISOLATED TO SCATTERED THUNDERSTORMS ACROSS ERN MN/NRN WI/WRN UPPER
MI THROUGH THIS EVENING MAY CONTAIN LARGE HAIL. 

SURFACE HEATING BETWEEN DOWNSTREAM TROUGH OVER THE CENTRAL GREAT
LAKES AREA AND UPSTREAM SYSTEM ON WV IMAGERY OVER ERN MN HAS
RESULTED IN REGION OF MUCAPE AROUND 1000 J/KG ACROSS NRN WI INTO WRN
UPPER MI. VERY STEEP LOW-LEVEL LAPSE RATES COMBINED WITH COOL
MID-LEVEL TEMPERATURES /-15C AT 500MB/ HAS MINIMIZED CONVECTIVE
INHIBITION AND IS ALLOWING FOR ISOLATED THUNDERSTORM DEVELOPMENT
ACROSS NWRN/NRN WI. AXIS OF BOUNDARY LAYER CU EXTENDS WWD INTO WRN
MN SUGGESTING THE POSSIBILITY OF ADDITIONAL STORMS DURING NEXT
SEVERAL HOURS WEST OF MS RIVER. STRONG SFC-6KM SHEAR OF 45-50 KT
COMBINED WITH WBZ HEIGHTS BETWEEN 7-8 KFT SUGGEST POTENTIAL FOR A
FEW LONG-LIVED STORMS SUPPORTIVE OF LARGE HAIL. ISOLATED SEVERE WIND
GUSTS ARE ALSO POSSIBLE GIVEN STRONG UNIDIRECTIONAL FLOW FIELDS AND
STEEP LAPSE RATES. INTENSITY OF CONVECTION IN THIS REGIME SHOULD
DIMINISH LATE THIS EVENING AS BOUNDARY LAYER BEGINS TO STABILIZE.

..BANACOS.. 06/13/2004

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

ATTN...WFO...MQT...GRB...DLH...ARX...MPX...

46839104 46758966 46788842 46108803 45318814 45138914
45099025 45209156 45429392 46029400 46699391

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 13, 7:29 AM CDT	Mesoscale Discussion	SPC	Dickinson, Iron	91 min
Jun 13, 11:45 AM CDT	Mesoscale Discussion	SPC	Alger, Allegan, Antrim, Arenac, Barry, Bay and 57 more	90 min
Jun 13, 12:00 PM CDT	Tornado Watch	SPC	Alcona, Allegan, Alpena, Antrim, Arenac, Barry and 55 more	7 hr
Jun 13, 2:01 PM CDT	Mesoscale Discussion	SPC	Alcona, Allegan, Alpena, Antrim, Arenac, Barry and 55 more	89 min
Jun 13, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	Monroe	5 hr
Jun 12, 7:00 PM CDT	Mesoscale Discussion	SPC	Dakota, Dodge, Fillmore, Goodhue, Houston, Mower and 6 more	2 hr
Jun 12, 9:10 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chippewa, Chisago, Dakota and 25 more	2 hr
Jun 12, 9:33 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chippewa, Chisago, Dakota and 25 more	117 min
Jun 13, 5:34 PM CDT	Mesoscale Discussion	SPC	Big Stone, Stevens, Traverse	116 min

Nearby

Mesoscale Discussions in Wisconsin, 2004 Mesoscale Discussions in Minnesota, 2004 Mesoscale Discussions in Michigan, 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.