Alert archive / Minnesota / Mesoscale Discussions in 2004
Mesoscale Discussion 2255
The Storm Prediction Center issued this mesoscale discussion at Sep 23, 2004, 3:26 PM CDT for 7 counties in Minnesota; Ashland County, Bayfield County, Douglas County, Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 23, 2004, 3:26 PM CDT (20:26 UTC)
- Expired
- Sep 23, 2004, 5:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Beltrami County, MN, Carlton County, MN, Clearwater County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Douglas County, WI
The radar
The Duluth radar (KDLH), 37 km from the middle of the area, began a volume at 20:27 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
International Fa, MN (KINL), launched 12:00Z, 8.4 hours before the alert went out and 174 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 579 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
992 ACUS11 KWNS 232027 SWOMCD SPC MCD 232026 MIZ000-MNZ000-WIZ000-232230- MESOSCALE DISCUSSION 2255 NWS STORM PREDICTION CENTER NORMAN OK 0326 PM CDT THU SEP 23 2004 AREAS AFFECTED...NERN MN/NWRN WI CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 232026Z - 232230Z ...ISOLD TSTM WIND DAMAGE POSSIBLE NEXT 1-3 HOURS ACROSS MN ARROWHEAD AND PORTIONS NWRN WI... LATEST ANALYSIS PLACES SFC LOW ABOUT 30 MILES EAST OF ABERDEEN...WITH WARM FRONT EXTENDING NE TO FAR/30 W INL. AN AXIS OF SFC INSTABILITY HAS DEVELOPED WITH OBJECTIVE ANALYSIS SUGGESTING SBCAPE VALUES NEAR 1000-1500 J/KG. VERY STRONG DEEP LAYER SHEAR IS IN PLACE WITH LATEST WOODLAKE MN PROFILER OBSERVING 50-60 KT AT 1KM WITHIN THE LAST 2 HOURS. STRONGEST WIND GUSTS ASSOCIATED WITH THE LEADING EDGE OF CONVECTION HAVE GENERALLY BEEN IN THE 35-40 KT RANGE...ALTHOUGH EARLIER A 56 KT GUST OCCURRED AT ANE ON THE N SIDE OF THE TWIN CITIES. IT APPEARS LIKELY THAT THIS NARROW BAND OF LOW TOPPED CONVECTION WILL BE MAINTAINED FOR AT LEAST ANOTHER 2-3 HOURS...AND WILL HAVE STRONG/GUSTY TSTM WIND GUSTS POSSIBLY WITH SOME WIND DAMAGE. ..TAYLOR.. 09/23/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MQT...DLH...FGF... 45899111 46689341 47659561 48609479 48699351 48439160 47789037 46219026 45889075
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 12:06 PM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 30 more | 114 min |
| Sep 23, 12:54 PM CDT | Mesoscale Discussion | SPC | Big Stone, Lac qui Parle, Lincoln, Lyon, Traverse, Yellow Medicine | 2 hr |
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.