Alert archive / Minnesota / Mesoscale Discussions in 2004
Mesoscale Discussion 1237
The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2004, 9:33 PM CDT for 31 counties in Minnesota; 9 counties in Wisconsin. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Jun 12, 2004, 9:33 PM CDT (02:33 UTC)
- Expired
- Jun 12, 2004, 11:30 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 40 counties
Anoka County, MN, Benton County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Dakota County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, Lyon County, MN, McLeod County, MN, Meeker County, MN, Nicollet County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Wabasha County, MN, Washington County, MN, Wright County, MN, Yellow Medicine County, MN, Barron County, WI, Burnett County, WI, Chippewa County, WI, Dunn County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI, Washburn County, WI
The radar
The Minneapolis radar (KMPX), 55 km from the middle of the area, began a volume at 02:36 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 00:00Z, 2.6 hours before the alert went out and 52 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.
- Mixed-layer CAPE
- 840 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 1411 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
124 ACUS11 KWNS 130233 SWOMCD SPC MCD 130233 WIZ000-MNZ000-130430- MESOSCALE DISCUSSION 1237 NWS STORM PREDICTION CENTER NORMAN OK 0933 PM CDT SAT JUN 12 2004 AREAS AFFECTED...SCENTRAL KS...WRN AND CENTRAL OK...NWRN/NCENTRAL TX CONCERNING...TORNADO WATCH 448... VALID 130233Z - 130430Z PORTIONS OF WW 448 WILL LIKELY NEED TO BE REPLACED WITH A NEW WW BEFORE EXPIRATION TIME OF 04Z...WITH SOME POTENTIAL THAT MUCH OF WW 448 WILL NEED TO BE REPLACED. DAMAGING WINDS WILL BE THE PRIMARY THREAT WITH FORWARD PROPAGATING MCS AS IT MOVES ENEWD AROUND 45 KTS FROM NORTH OF ABI/SW OF SPS INTO THE SERN PORTION OF WW 448 JACK/WISE AND CLAY COUNTIES BY AROUND 04Z. STRENGTH OF COLD POOL ASSOCIATED WITH THIS LINE AND MINIMAL INHIBITION NOTED ON THE FWD SOUNDING...SHOULD SUPPORT A SEVERE THREAT THAT WILL LAST AT LEAST SEVERAL HOURS BEYOND 04Z INTO NCENTRAL TX WHERE A NEW WW WILL LIKELY NEED TO BE ISSUED BEFORE 04Z. FARTHER NORTH...OUTFLOW BOUNDARY FROM NWRN TX CONVECTION HAS BEEN INTERSECTING A OLD CONVECTIVE OUTFLOW BOUNDARY OVER THE SERN TX PANHANDLE AND NEW STRONG-SEVERE CONVECTION WAS DEVELOPING IN THIS AREA. NWD PROGRESS OF NEW DEVELOPMENT WHERE THIS OUTFLOW BOUNDARY WILL MOVE NWD INTO ONLY WEAKLY CAPPED AIRMASS REMAINS UNCERTAIN. THERE IS THE POTENTIAL THAT WITH THE INCREASING LOW LEVEL JET CONVECTION MAY BE MAINTAINED FOR QUITE SOME TIME THIS EVENING OVER WRN OK IF DEVELOPMENT CONTINUES OVER THE NEXT HOUR. ADDITIONAL ISOLATED SUPERCELL OVER BUTLER/COWLEY COUNTY LINE WILL CONTINUE TO MOVE EWD AROUND 15 KTS WITH THE THREAT FOR TORNADOES CONTINUING AS IT MOVES INTO WW 454. CONVECTION MOVING ESEWD OUT OF CENTRAL KS MAY BACKBUILD SWD INTO SCENTRAL KS OVER THE NEXT FEW HOURS. THUS THIS AREA MAY AS WELL NEED TO BE PUT INTO A REPLACEMENT SEVERE WW BEFORE 04Z. ..CROSBIE.. 06/13/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...DLH...ARX...MPX...FSD...ABR... 44359595 44819637 45599617 45719524 45849291 45999152 45269098 44239216
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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 13, 3:29 PM CDT | Mesoscale Discussion | SPC | Aitkin, Carlton, Chisago, Isanti, Kanabec, Mille Lacs and 2 more | 2 hr |
| Jun 13, 5:34 PM CDT | Mesoscale Discussion | SPC | Big Stone, Stevens, Traverse | 116 min |
| Jun 13, 7:29 AM CDT | Mesoscale Discussion | SPC | Adams, Clark, Florence, Forest, Jackson, Juneau and 19 more | 91 min |
| Jun 13, 11:45 AM CDT | Mesoscale Discussion | SPC | Brown, Calumet, Door, Fond du Lac, Kenosha, Kewaunee and 10 more | 90 min |
Nearby
Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in Wisconsin, 2004Every 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.