581  
WWUS85 KBYZ 220327  
SPSBYZ  
 
SPECIAL WEATHER STATEMENT  
NATIONAL WEATHER SERVICE BILLINGS MT  
927 PM MDT MON MAY 21 2018  
 
MTZ029>031-035-220430-  
YELLOWSTONE MT-NORTHERN ROSEBUD MT-TREASURE MT-MUSSELSHELL MT-  
927 PM MDT MON MAY 21 2018  
   
..SIGNIFICANT WEATHER ADVISORY
 
 
AT 922 PM MDT, DOPPLER RADAR WAS TRACKING AN AREA OF STRONG  
THUNDERSTORMS ACROSS NORTHEAST YELLOWSTONE AND EASTERN MUSSELSHELL  
COUNTIES MOVING EAST AT 10 MPH.  
 
FREQUENT LIGHTNING, HEAVY RAIN AND POSSIBLY SOME SMALL HAIL ARE  
EXPECTED WITH THESE STORMS.  
 
LOCATIONS IMPACTED INCLUDE...  
HYSHAM, CUSTER, MELSTONE, INGOMAR, VANANDA AND BIGHORN.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
LOCALIZED TORRENTIAL RAINFALL IS OCCURRING, AND MAY LEAD TO  
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED  
ROADWAYS.  
 
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.  
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE  
SHELTER INSIDE A BUILDING OR VEHICLE.  
 

 
 
LAT...LON 4686 10700 4615 10686 4605 10774 4676 10791  
4676 10783 4678 10785 4679 10784 4680 10785  
4681 10784 4683 10786 4684 10788 4685 10787  
4686 10778 4685 10747 4686 10746  
TIME...MOT...LOC 0322Z 261DEG 49KT 4633 10746  
 

 
 
TESAR  
 
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