513  
WWUS43 KUNR 142020  
WSWUNR  
 
URGENT - WINTER WEATHER MESSAGE  
NATIONAL WEATHER SERVICE RAPID CITY SD  
220 PM MDT WED APR 14 2021  
   
..SNOW LATE TONIGHT INTO THURSDAY NIGHT
 
 
.A STORM SYSTEM WILL BRING A PROLONGED PERIOD OF MOSTLY LIGHT  
SNOWFALL TO MUCH OF NORTHEAST WYOMING AND SOUTHWEST SOUTH DAKOTA,  
STARTING LATE TONIGHT OVER NORTHEAST WYOMING AND EARLY THURSDAY  
OVER THE BLACK HILLS AND FAR SOUTHWEST SOUTH DAKOTA. SNOWFALL  
AMOUNTS OF 2 TO 6 INCHES ARE EXPECTED ACROSS MUCH OF THE ADVISORY  
AREA BY LATE THURSDAY NIGHT.  
 
WYZ054-056-151200-  
/O.EXA.KUNR.WW.Y.0009.210415T0600Z-210416T1200Z/  
NORTHERN CAMPBELL-WESTERN CROOK-  
INCLUDING MOORCROFT AND HULETT  
220 PM MDT WED APR 14 2021  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO  
6 AM MDT FRIDAY...  
 
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS OF 2 TO 5  
INCHES...ESPECIALLY NEAR THE INTERSTATE 90 CORRIDOR.  
 
* WHERE...NORTHERN CAMPBELL COUNTY AND WESTERN CROOK COUNTY.  
 
* WHEN...FROM MIDNIGHT TONIGHT TO 6 AM MDT FRIDAY.  
 
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
SLOW DOWN AND USE CAUTION WHILE TRAVELING.  
 
ROAD CONDITIONS ARE AVAILABLE ON YOUR SMARTPHONE FROM THE  
5 1 1 APP FOR YOUR STATE.  
 

 
 

 
 
SDZ026-074-151200-  
/O.EXA.KUNR.WW.Y.0009.210415T1200Z-210416T1200Z/  
RAPID CITY-HERMOSA FOOT HILLS-  
INCLUDING RAPID CITY, HERMOSA, BUFFALO GAP, AND FAIRBURN  
220 PM MDT WED APR 14 2021  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM THURSDAY TO 6 AM  
MDT FRIDAY...  
 
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS OF 3 TO 6  
INCHES...ESPECIALLY ACROSS HIGHER ELEVATIONS.  
 
* WHERE...THE RAPID CITY AREA AND THE HERMOSA FOOT HILLS.  
 
* WHEN...FROM 6 AM THURSDAY TO 6 AM MDT FRIDAY.  
 
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
SLOW DOWN AND USE CAUTION WHILE TRAVELING.  
 
ROAD CONDITIONS ARE AVAILABLE ON YOUR SMARTPHONE FROM THE  
5 1 1 APP FOR YOUR STATE.  
 

 
 

 
 
WYZ055-058-151200-  
/O.CON.KUNR.WW.Y.0009.210415T0600Z-210416T1200Z/  
SOUTHERN CAMPBELL-WESTON-  
INCLUDING WRIGHT AND UPTON  
220 PM MDT WED APR 14 2021  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT  
TONIGHT TO 6 AM MDT FRIDAY...  
 
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS OF 4 TO 7  
INCHES.  
 
* WHERE...SOUTHERN CAMPBELL COUNTY AND THE WESTON COUNTY PLAINS.  
 
* WHEN...FROM MIDNIGHT TONIGHT TO 6 AM MDT FRIDAY.  
 
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
SLOW DOWN AND USE CAUTION WHILE TRAVELING.  
 
ROAD CONDITIONS ARE AVAILABLE ON YOUR SMARTPHONE FROM THE  
5 1 1 APP FOR YOUR STATE.  
 

 
 

 
 
SDZ024-028-029-WYZ057-151200-  
/O.CON.KUNR.WW.Y.0009.210415T1200Z-210416T1200Z/  
NORTHERN BLACK HILLS-CENTRAL BLACK HILLS-SOUTHERN BLACK HILLS-  
WYOMING BLACK HILLS-  
INCLUDING LEAD, DEADWOOD, BROWNSVILLE, CHEYENNE CROSSING, GALENA,  
NEMO, HILL CITY, MT RUSHMORE, DEERFIELD, HISEGA, MYSTIC,  
PACTOLA RESERVOIR, ROCHFORD, ROCKERVILLE, CUSTER, JEWEL CAVE,  
PRINGLE, CUSTER STATE PARK, WIND CAVE, SUNDANCE, ALADDIN, BEULAH,  
AND FOUR CORNERS  
220 PM MDT WED APR 14 2021  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM THURSDAY  
TO 6 AM MDT FRIDAY...  
 
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS OF 3 TO 6  
INCHES.  
 
* WHERE...IN SOUTH DAKOTA, THE NORTHERN BLACK HILLS, THE  
SOUTHERN BLACK HILLS AND THE CENTRAL BLACK HILLS. IN WYOMING,  
THE WYOMING BLACK HILLS.  
 
* WHEN...FROM 6 AM THURSDAY TO 6 AM MDT FRIDAY.  
 
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
SLOW DOWN AND USE CAUTION WHILE TRAVELING.  
 
ROAD CONDITIONS ARE AVAILABLE ON YOUR SMARTPHONE FROM THE  
5 1 1 APP FOR YOUR STATE.  
 

 
 

 
 
SDZ027-041-151200-  
/O.CON.KUNR.WW.Y.0009.210415T1200Z-210416T1200Z/  
SOUTHERN FOOT HILLS-FALL RIVER-  
INCLUDING EDGEMONT, HOT SPRINGS, AND ARDMORE  
220 PM MDT WED APR 14 2021  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM THURSDAY  
TO 6 AM MDT FRIDAY...  
 
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS OF 3 TO 6  
INCHES.  
 
* WHERE...THE FALL RIVER COUNTY PLAINS AND THE SOUTHERN FOOT  
HILLS.  
 
* WHEN...FROM 6 AM THURSDAY TO 6 AM MDT FRIDAY.  
 
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
SLOW DOWN AND USE CAUTION WHILE TRAVELING.  
 
ROAD CONDITIONS ARE AVAILABLE ON YOUR SMARTPHONE FROM THE  
5 1 1 APP FOR YOUR STATE.  
 

 
 

 
 
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