Heavy Snow in the Cascades and Northern Rockies; Wintry Mix in the Northeast; High Winds in Southern California

Two more cold fronts will pass through the Northwest U.S. this week with heavy mountain snow continuing across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain across the Northeast U.S. today. High winds could blow down trees and power lines in the mountains of southern California this evening through Thursday. Read More >

Overview

A significant severe weather event struck Rolette County during the late afternoon of Wednesday, August 3rd, 2016. A tornado developed approximately six miles south of Mylo, ND at 528 PM CDT. The tornado traveled northeast and produced extensive damage to two farmsteads, before exiting into Towner County between the town of Agate and Highway 66 at 545 PM CDT. There were no injuries and no fatalities from this tornado.

Based on the damage done, the tornado was rated EF2 on the Enhanced Fujita Scale. From that it was determined that tornado winds were around 120 mph.

Storm reports for central ND

Tornado
Storm Reports

Tornadoes:

Tornado - LOCATION
Rolette and Towner counties

Date	August 3rd, 2016
Time (Local)	Started at 5:28 PM CDT
EF Rating	EF 2
Est. Peak Winds	120 MPH
Path Length	About 20 miles
Max Width	1200 Yards
Injuries/Deaths	0
Summary: This tornado was on the ground from 5:28 PM to 6:25 PM CDT tracking from 6 miles south of Mylo to 4 miles NNE of Arndt. This was a multi-vortex tornado and additional analysis may be needed.

Track Map

KML


Farmstead damage south of Mylo	Farmstead damage south of Mylo	Storm relative velocity	Reflectivity

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Storm Reports

Public Information Statement
National Weather Service Bismarck ND
248 PM CDT Fri Aug 5 2016

Wind...Hail...and Rainfall Reports for August 3, 2016

...Hail Reports...

Location                     Size      Time/Date                            
11 NNW Dunseith              3.00 in   0420 PM 08/03                        
1 SSE Rugby                  2.50 in   0421 PM 08/03                        
2 NE Mylo                    1.75 in   0550 PM 08/03                        
Rugby                        1.75 in   0420 PM 08/03                        
Rugby                        1.75 in   0420 PM 08/03                        
10 NE Bottineau              1.75 in   0418 PM 08/03                        
5 WNW Venturia               1.50 in   1000 PM 08/03                        
8 SW Rugby                   1.25 in   0401 PM 08/03                        
4 WNW Rolette                1.00 in   0510 PM 08/03                        
Heimdal                      0.88 in   0741 PM 08/03                        
3 SW Wolford                 0.75 in   0445 PM 08/03                        
3 SSE Thorne                 0.75 in   0435 PM 08/03                        

...Rainfall Reports...

Location                     Amount    Time/Date                            
2 NE Mylo                    3.60 in   0655 PM 08/03                                               

...Wind Reports...

Location                     Speed     Time/Date                            
4 S Ellendale                81 MPH    1142 PM 08/03                        
2 NE Mylo                    60 MPH    0550 PM 08/03                        

Observations are collected from a variety of sources with varying
equipment and exposures. Not all data listed are considered official.

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Heavy Snow in the Cascades and Northern Rockies; Wintry Mix in the Northeast; High Winds in Southern California

Severe Storms from August 3, Tornadoes, Baseball Sized Hail and More