NOUS75 KMSO 242000 ADMMSO ADMINISTRATIVE MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1215 PM MDT THU APR 24 2014 TO ALL WFOS SURROUNDING WFO MSO FM WFO MSO WFO MSO HAS ISSUED A HEADS-UP EMAIL TO OUR EMERGENCY MANAGEMENT COMMUNITY AND OTHER PARTNERS. EMAIL TOPIC...ANOTHER SPRING STORM APPROACHING THIS WEEKEND ...REASONING IN EMAIL... GREETINGS, THIS EMAIL IS INTENDED TO INFORM EVERYONE THAT ANOTHER SPRING STORM WILL IMPACT CENTRAL IDAHO AND WESTERN MONTANA THIS WEEKEND. A LOW PRESSURE SYSTEM WILL DEVELOP ON THE LEADING EDGE OF AN APPROACHING UPPER LEVEL TROUGH. THE LOW PRESSURE SYSTEM WILL INITIALLY IMPACT CENTRAL IDAHO AND SOUTHWESTERN MONTANA WITH VALLEY RAIN AND MOUNTAIN SNOW ABOVE 5000 FEET ON FRIDAY AFTERNOON AND EVENING. LOCATIONS IN SOUTHERN IDAHO COUNTY AND LEMHI COUNTY COULD SEE A FEW THUNDERSTORMS DEVELOP IN THE AFTERNOON. THE LOW PRESSURE WILL MOVE TO THE NORTHEAST THROUGH WEST-CENTRAL MONTANA OVERNIGHT FRIDAY AND SATURDAY MORNING AND CROSS THE CONTINENTAL DIVIDE NEAR GLACIER NATIONAL PARK. SNOW ABOVE 4500 FEET COULD BECOME HEAVY AT TIMES IN SOUTHWEST MONTANA AND THE MOUNTAINS AND MOUNTAIN PASSES ALONG THE CONTINENTAL DIVIDE. BELOW IS A BREAKDOWN ON PRECIPITATION AMOUNTS FOR EACH REGION. IDAHO AND LEMHI COUNTIES: LOCATIONS ABOVE 4500 FEET, INCLUDING LOLO PASS, EXPECT A STORM TOTAL OF 3 TO 5 INCHES OF SNOW FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON. VALLEY LOCATIONS WILL SEE RAIN AMOUNTS RANGING FROM .30 TO 1.00 WITH THE HIGHER AMOUNTS IN SOUTHERN IDAHO COUNTY. SOUTHWEST MONTANA: HIGHER ELEVATIONS SUCH AS GEORGETOWN LAKE AND MACDONAL PASS COULD SEE SNOW AMOUNTS RANGING FROM 3 - 6 INCHES FROM FRIDAY EVENING THROUGH SATURDAY AFTERNOON. VALLEYS WILL SEE RAIN AMOUNTS OF .30 TO 0.50 INCH. NORTHWEST MONTANA: THIS REGION AGAIN IS EXPECTED TO GET HIT THE HARDEST WITH MOUNTAIN SNOW AND VALLEY RAIN. ELEVATIONS ABOVE 5000 FEET IN GLACIER NATIONAL PARK, INCLUDING MARIAS PASS COULD SEE 6 - 10 INCHES OF SNOW FROM OVERNIGHT FRIDAY INTO SUNDAY MORNING. HEAVY WET SNOW AND VALLEY RAIN COULD CREATE THE POTENTIAL FOR AVALANCHES, AND ROCK AND MUDSLIDES AT LOWER EVELATIONS. IF YOU HAVE ANY QUESTIONS OR COMMENTS PLEASE CONTACT USE. (406)329-4840 IF YOU HAVE QUESTIONS OR CONCERNS...DO NOT HESITATE TO CALL OR CHAT US.