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Temperatures Well Above Normal in the Southwest & California; Snow Possible in the Northern Plains

Much above average temperatures will continue from California, through the Southwest and into the Great Basin, with poor air quality due to ongoing wildfires. Elsewhere, a slow-moving storm over the Northern High Plains will reach the Upper Great Lakes by Wednesday. This system will produce areas of snow, rain, and freezing rain. Rainy weather will also continue over parts of Florida. Read More >

Overview

Tropical system Cristobal, that originated in the Gulf of Mexico, quickly moved northward during a two day period from 7pm Monday June 8 through 7 am Wednesday June 10.  Although the system weakened to a tropical depression as it moved onshore over the southern Mississippi Valley, it still brought copious amounts of moisture into the western Great Lakes region late Tuesday afternoon. The system moved quickly over the region and by 7am Wednesday the center of the circulation was located over southern Lake Superior, well on its way out of the area.  Primary impacts associated with the remnants of Cristobal were heavy rainfall and strong winds. Twenty-four hour storm total rainfall amounts, from Tuesday to 7 am Wednesday ranged from less than an inch over eastern Wisconsin to locally 4-5 inches over southeast Minnesota and SW Wisconsin (see precipitation map below)Flooding was reported over many areas across NE Iowa, SE Minnesota and SW Wisconsin.  Areas further east across central and eastern Wisconsin only minor flooding was noted. In addition, this system had record low pressure for the month of June, which allowed for widespread wind gusts in the range of 30-50 mph.

The impacts from Cristobal could have been far worse. Had the system been slower in crossing the region, the ample moisture available would have created much more widespread significant flooding concerns.  Fortunately, Cristobal was relatively fast moving, which prevented the overall rainfall totals (and associated impacts) from being much higher across the Western Great Lakes region. For details, see the tabs below.

Storm Total Rainfall from Tuesday through Wednesday morning.

 

 
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