• After witnessing the continued decrease of involvement in the SpotterNetwork staff in serving SN members with troubleshooting issues recently, I have unilaterally decided to terminate the relationship between SpotterNetwork's support and Stormtrack. I have witnessed multiple users unable to receive support weeks after initiating help threads on the forum. I find this lack of response from SpotterNetwork officials disappointing and a failure to hold up their end of the agreement that was made years ago, before I took over management of this site. In my opinion, having Stormtrack users sit and wait for so long to receive help on SpotterNetwork issues on the Stormtrack forums reflects poorly not only on SpotterNetwork, but on Stormtrack and (by association) me as well. Since the issue has not been satisfactorily addressed, I no longer wish for the Stormtrack forum to be associated with SpotterNetwork.

    I apologize to those who continue to have issues with the service and continue to see their issues left unaddressed. Please understand that the connection between ST and SN was put in place long before I had any say over it. But now that I am the "captain of this ship," it is within my right (nay, duty) to make adjustments as I see necessary. Ending this relationship is such an adjustment.

    For those who continue to need help, I recommend navigating a web browswer to SpotterNetwork's About page, and seeking the individuals listed on that page for all further inquiries about SpotterNetwork.

    From this moment forward, the SpotterNetwork sub-forum has been hidden/deleted and there will be no assurance that any SpotterNetwork issues brought up in any of Stormtrack's other sub-forums will be addressed. Do not rely on Stormtrack for help with SpotterNetwork issues.

    Sincerely, Jeff D.

2/11/08 FCST (winter WX): IA, MN, IL, MO

Joined
Jul 23, 2004
Messages
497
Location
Iowa City, IA
A prolonged period of light snow will bring a few inches of the white stuff to the Eastern Iowa area beginning shortly after midnight on Monday. Following are forecasts for specific areas in the area:

Cedar Rapids:
Light snowfall will start at 1 AM Monday, and continue through 2 AM Tuesday. Total accumulation: 5.1 inches.

Iowa City:
Light snowfall will start at 1 AM Monday, and continue through 2 AM Tuesday. Total accumulation: 3.4 inches.

Marengo:
Light snowfall will start at 1 AM Monday, and continue through 2 AM Tuesday. Total accumulation: 3.8 inches.

Paris/Coggon (northern Linn Co.):
Light snowfall will start at 12:30 AM Monday, and continue through 2 AM Tuesday. Total accumulation: 5.5 inches.

Synopsis:
A stacked ULVL system was rotating over the Hudson Bay area and NRN Great lakes. Upstream from the trough was a sharp H7-H6 baroclinic zone extending from NWRN ND into ERN IA. Large scale assent in association with a couple of lead waves over the Dakotas showed up well on the WV loop. Closer to home, a very cold air mass was in place, with SFC temperatures hovering around 0F along with NWRLY winds gusting in excess of 35 mph.

Discussion:
This is somewhat of a complicated FCST as there will be several regions and mechanisms of forcing that will occur in the Upper Midwest throughout the event. Precipitation, which will be associated with a zone of H8-H7 frontogenesis, will start in NWRN into ERN IA after 06Z Monday. Top-down saturation of the column should occur rapidly as a lead wave approaches the region. During the day Monday, overrunning and isentropic uplift along the 290K-300K SFCS really kicks in over MO, while lifting parcels to their LFC where MUCAPEs of 250J/kg is indicated. A range of winter WX along with elevated convection and thunderstorms with marginally SVR hail is in store for areas around I-70. Late in the day Monday, an approaching vort-max will result in a few hours of strong kinematic forcing in the Upper-Midwest. There remains some disagreement between the MDLs as to exactly where the strongest lift will be, and now the best guess is for a UVM bulls-eye to track through NERN IA through 00Z Tuesday. Regarding snowfall amounts, relatively high snow/water ratios are used with snow production temperatures between -10C and -20C. Early in the event a 20:1 ratio is used, and this is tapered to 15:1 towards the end of the snowfall period with weak WAA in the dendritic growth region.

- bill
2:15 PM, Sunday, 02/10/08
 
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