10/29/04 NOW: Upper Midwest

[Joel Wright]

Some of the moisture must be getting mixed out as the Td's have dropped to the low 60's right ahead of the front. That's not too good.

There is a ling of cumulus along the CF now though in western IA. Looks like a thin squal line will be what will emerge out of that.

Further north in southern MN currently looks the best for tornadic activity.

It feels like summer here in NW IL. Td's nearing 70!!?!?

 

[Dan Cook]

almost 80 here. DP's hovering around 71, clouds finally gone.

 

[mikegeukes]

New: WW 870 TORNADO MN WI 292035Z - 300200Z
http://www.spc.noaa.gov/products/watch/ww0870.html

For those who are chasing, cyber chasing or nowcasting,
here are some Sunset times to keep in mind.

612 PM CDT Des Moines IA -Sunset
641 PM CDT Des Moines IA -End of Civil Twilight

605 PM CDT Minneapolis MN -Sunset
635 PM CDT Minneapolis MN -End of Civil Twilight

Mike

 

[mikedeason]

[2105Z]Nice cell going up in Sibley Co., MN that looks to track west of the Twin Cities over the next 60-90 minutes. Other cells popping up in Emmet Co., IA and Martin Co., MN.

Regards,

Mike

 

[rdale]

Looks like stuff in central MN is taking advantage of good moistconv but running away from good instab - and stuff south has the juice to pop but not sustaining...

 

[mikedeason]

[2120z] Storm over Sibley Co. MN is holding together, currently showing an elevated core of >60dbz while cell just south of Mankato in Blue Earth Co. MN continues to intensify with a deep elevated core of >50dbz returns now.

Regards,

Mike

 

[mikedeason]

Yep, looks like that cell west of the Twin Cities will be of little significance. On the other hand, the cells from Mankato south into IA should be able to take advantage of >250 m2/s2 0-1km SRH over southeast MN. Should be interesting over the nest few hours.

Regards,

Mike

 

[Morgan Palmer]

Topic Split at 4:56pm
mp

 

[mikedeason]

[2158z] Looks like a isolated cell is trying to develop over northeastern Wnnebago Co., IA/southern Freeborn Co. MN in advance of the squall line. Cells north of Mankato still holding together and moving towards the Twin Cities, but nothing too impressive as of yet.

Also interesting is line of TCU's from developing from northwest MO into cetral IA in advance of squall line and cold front.

Regards,

Mike

 

[mikedeason]

[2209Z] Isolated cells now popping up over central IA in advance of squall line. Most interesting cell at the moment os over Decatur Co, moving into southern Clarke Co.

Regards,

Mike

 

[rdale]

Well-developed rotation over Decatur CO - strange that 2 TVS' are showing up over DSM!

 

[mikegeukes]

Northern Decatur County Iowa, now under a Tornado Warning
Source: http://kamala.cod.edu/svr/0410292210.KDMX.wfus53.html

Eastern Clarke County Iowa also under a tornado warning.
Source: http://kamala.cod.edu/svr/0410292221.KDMX.wfus53.html

For the time period of October 24-31, 1950-2003
Iowa has seen one tornado day and one tornado,
and that occurred on 10-31-00.

Mike

 

[Andy Wehrle]

Update from NE WI

(ADMIN delete: currents from GRB. -mpalmer)

TWC radar shows a nice hook developing on that storm south of Des Moines.

 

[Andy Wehrle]

0541 PM HAIL NEVADA 42.02N 93.45W
10/29/2004 0.88 INCH STORY IA AMATEUR RADIO

First svr wx report out of IA is .88" hail

 

[Jeremy Lemanski]

Trees and power lines downed in jasper co. iowa. The storms are moving ENE and NE at 50-65mph.

Radar is detecting 70knot winds in the storms east of St paul Minn. Its gonna be a long night.

EDIT. Tornado warnings up for Livingston and ford counties in Ill. Strong rotation on radar, well defined hook echo.