National Weather Service United States Department of Commerce

Brief Details of the Tornadoes from Thursday, September 20, 2018

This is a brief listing of all the tornadoes that have been confirmed. Some of these tracks may be combined to reduce the total number, and some others may yet be found. All information is preliminary. A web page with track maps, times, and other information will be updated when tracks are determined. Read More >

Soaring Forecast for the Twin Cities Area              
              Prepared at 12:30 GMT Tue Sep 25 2018                              
                                                                   
Height          Wind          Wind           Temp           Soaring
(ft AGL)        Direction     Speed(kts)     (Deg C)        Index  
3000            275           08              7              3.0
5000            290           13              7              9.0
7000            270           18              5             13.0
 
Temperature needed for lift to 3000 ft agl (Trigger Temp)..62 
 
Time at which trigger temperature will be reached..........Will Not Reach  
 
Maximum Temperature for the day............................56 Deg F
 
Maximum altitude of thermals...............................2200 (ft agl)
 
Height where cumulus will form.............................2100 (ft agl)
 
Base of cumulus during the afternoon.......................1000 (ft agl)
 
Total Sky Cover in Eighths (Oktas) (11 AM to 4 PM).........6
 
Implications of specific soaring indices:
-4 or Less............Excellent
-3....................Good
-2 or -1..............Fair
Zero or Greater.......Poor
 
Forecast is based on Upper Air Data collected
at Chanhassen, Minnesota. Elevation 943 feet.
 
 
 
To: Princeton FSS, FAX, (763) 389-7143  Voice, (800) 642-6505
From: National Weather Service Chanhassen, Voice (952) 361-6671