Alert archive / Minnesota / Mesoscale Discussions in 2005

Mesoscale Discussion 792

May 9, 200526 counties in Minnesota; 17 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at May 9, 2005, 12:58 PM CDT for 26 counties in Minnesota; 17 counties in Wisconsin. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: May 9, 2005, 12:58 PM CDT (17:58 UTC)
Expired: May 9, 2005, 2:30 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 43 counties

Aitkin County, MN, Anoka County, MN, Benton County, MN, Chisago County, MN, Crow Wing County, MN, Dakota County, MN, Douglas County, MN, Fillmore County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Isanti County, MN, Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN, Olmsted County, MN, Pine County, MN, Ramsey County, MN, Sherburne County, MN, Stearns County, MN, Todd County, MN, Wabasha County, MN, Wadena County, MN, Washington County, MN, Winona County, MN, Wright County, MN, Barron County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI, Trempealeau County, WI, Washburn County, WI

The radar

The Minneapolis radar (KMPX), 57 km from the middle of the area, began a volume at 18:00 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, 6.0 hours before the alert went out and 59 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: 142 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
ACUS11 KWNS 091758
SWOMCD
SPC MCD 091758 
WIZ000-MNZ000-IAZ000-091930-

MESOSCALE DISCUSSION 0792
NWS STORM PREDICTION CENTER NORMAN OK
1258 PM CDT MON MAY 09 2005

AREAS AFFECTED...CNTRL AND ERN MN...WRN WI

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 091758Z - 091930Z

STORMS WILL CONTINUE TO DEVELOP ACROSS ERN MN AND WRN WI THROUGH
MID-AFTERNOON. HAIL AND STRONG WIND GUSTS WILL BE POSSIBLE WITH THE
STRONGER CELLS. A WW MAY BECOME NECESSARY THIS AFTERNOON ACROSS THE
REGION.

WATER VAPOR IMAGERY CURRENTLY SHOWS AN UPPER-LOW OVER FAR NE SD WITH
A BAND OF STRONG ASCENT SPREADING NEWD BEHIND A DRY SLOT MOVING
ACROSS SRN MN AND CNTRL IA. AS TEMPS CONTINUE TO HEAT UP ALONG AND
AHEAD OF A COLD FRONT EXTENDING SEWD ACROSS SRN MN...CELLS SHOULD
INITIATE AND MOVE NWD ACROSS THE REGION. ALTHOUGH...DEEP LAYER SHEAR
WILL ONLY BE IN THE 25 TO 30 KT RANGE THIS AFTERNOON...ENOUGH
INSTABILITY SHOULD DEVELOP THIS AFTERNOON FOR MARGINALLY SEVERE
MULTICELLS WITH HAIL THE MAIN THREAT. STRONG WIND GUSTS WILL ALSO BE
POSSIBLE ESPECIALLY ACROSS WRN WI AND FAR ERN MN WHERE OBJECTIVE
ANALYSIS SHOWS 0-2 KM LAPSE RATES EXCEEDING OF 7.0 C/KM.

..BROYLES.. 05/09/2005

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

ATTN...WFO...DLH...ARX...MPX...FGF...

44069282 44989380 45709549 46439542 46819455 46769297
45739124 44789047 43669064 43399230

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 8, 7:14 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Becker, Beltrami, Benton, Big Stone and 71 more	2 hr
May 9, 12:00 PM CDT	Mesoscale Discussion	SPC	Adams, Columbia, Crawford, Dane, Green, Iowa and 10 more	90 min
May 9, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Calumet, Clark, Columbia, Dane, Dodge and 27 more	7 hr
May 9, 3:31 PM CDT	Mesoscale Discussion	SPC	Adams, Calumet, Columbia, Dane, Dodge, Fond du Lac and 21 more	89 min
May 9, 5:32 PM CDT	Mesoscale Discussion	SPC	Adams, Calumet, Clark, Columbia, Dane, Dodge and 27 more	28 min

Nearby

Mesoscale Discussions in Minnesota, 2005 Mesoscale Discussions in Wisconsin, 2005 Every mesoscale discussion in 2005

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.