945  
FXUS65 KGGW 260053 AAA  
AFDGGW  
 
AREA FORECAST DISCUSSION...UPDATED  
NATIONAL WEATHER SERVICE GLASGOW MT  
653 PM MDT MON MAR 25 2019  
   
DISCUSSION
 
 
SEND AN UPDATE THIS EVENING TO FINE TUNE THE TEMPERATURES AND  
WINDS BASED ON THE LATEST OBSERVATIONS AND THE BEST NEAR/SHORT  
TERM MODEL CONSENSUS I COULD FIND. WITH CONTINUING CLEARING SKIES  
AND RECENT WETTING RAINS, WE EXPECT FOG TO DEVELOP TONIGHT. WILL  
KEEP A CLOSE EYE OUT. BMICKELSON  
 
PREVIOUS DISCUSSION: MUCH QUIETER PATTERN AHEAD FOR THE NEXT DAY  
OR TWO BEFORE THE UPPER LEVEL RIDGING OVERHEAD BEGINS TO BREAK  
DOWN. MOST OF THE CWA WILL STAY DRY THROUGH THE WEEKEND AND INTO  
EARLY NEXT WEEK, WITH THE EXCEPTION OF OUR FAR SOUTHERN ZONES.  
 
SHORT TERM (TONIGHT THROUGH WEDNESDAY NIGHT)...  
WE HAVE A GOOD SETUP FOR DENSE FOG TONIGHT: RECENT RAINFALL,  
SNOWMELT (AND ICE MELT FROM YESTERDAY / LAST NIGHT'S FREEZING  
RAIN), LIGHT WINDS, AND A MILDER AIRMASS TRYING TO SNEAK IN. THE  
LOCATIONS WITH THE BEST SETUP FOR FOG TONIGHT ARE NORTH OF THE MO  
RIVER. VISIBILITIES SHOULD DROP CONSIDERABLY AFTER 9 PM TONIGHT,  
WITH LOWEST VISIBILITIES AFTER ABOUT MIDNIGHT UNTIL ABOUT 9 AM.  
WENT AHEAD AND ISSUED A DENSE FOG ADVISORY FOR ALL ZONES NORTH OF  
THE MO RIVER EXCEPT SOUTHWEST PHILLIPS COUNTY. TEMPERATURES SHOULD  
DIP BELOW FREEZING (BARELY) AS WELL, WHICH SHOULD ALSO LEAD TO  
SOME AREAS OF FREEZING FOG.  
 
THE FOG SHOULD LINGER IN SOME SPOTS--MAINLY NORTHERN AND EAST-  
CENTRAL VALLEY, DANIELS, AND NORTHWEST ROOSEVELT COUNTIES--INTO  
THE AFTERNOON HOURS. THIS AREA STILL HAS SOME SNOW COVER PER  
WEBCAMS AND NOHRSC SITE, AND THE LINGERING FOG AND WHATEVER SNOW  
COVER IS LEFT SHOULD KEEP TEMPERATURES DOWN IN THIS AREA. FURTHER  
SOUTH, TEMPERATURES WILL BE MUCH WARMER THAN THEY HAVE BEEN IN A  
WHILE, WITH SOME PARTS OF THE SOUTHERN CWA THREATENING TO HIT 70.  
 
THERE'S POTENTIAL FOR FOG ONCE AGAIN TOMORROW NIGHT NORTH, BUT  
THE WINDS SHOULD BE A TOUCH STRONGER WHICH COULD LOWER THE CHANCES  
OF IT DEVELOPING. A MIX OF RAIN AND SNOW IS POSSIBLE SOUTH OF A  
ZORTMAN TO WIBAUX LINE LATE TOMORROW AFTERNOON INTO TOMORROW NIGHT  
AS WELL.  
 
LONG TERM (THURSDAY AND BEYOND)...  
MODELS DISAGREE ON THE DETAILS REGARDING THE NORTHERN EXTENT OF  
PRECIPITATION THURSDAY AND FRIDAY, SO GENERALLY KEPT POPS LOW.  
AFTER A COUPLE OF DAYS (THU-FRI) WITH COOLER TEMPERATURES, THEY  
SHOULD REBOUND AGAIN AS RIDGING TRIES TO BUILD BACK IN OVER THE  
AREA.  
 
AVERY  
 

 
   
AVIATION
 
 
FLIGHT CAT: BECOMING IFR TONIGHT, WITH VLIFR EXPECTED AT KGGW &  
KOLF OVERNIGHT INTO TUESDAY MORNING.  
 
DISCUSSION: FOG IS EXPECTED TO DEVELOP TONIGHT, WITH BRIEF PERIODS  
OF FREEZING FOG POSSIBLE, LONGEST AT KOLF. REDUCED VISIBILITIES  
AND LOWERED CEILINGS AT KOLF & KGGW SHOULD IMPACT AIRPORT  
OPERATIONS THROUGH ABOUT 15Z ON TUESDAY BEFORE CONDITIONS BEGIN TO IMPROVE.  
WINDS: LIGHT SE WINDS (LESS THAN 5 KTS) AT KGGW & KOLF OVERNIGHT;  
LIGHT S WINDS AT KGDV & KSDY. WINDS SHIFT TO THE SOUTH AND  
SOUTHWEST ON TUESDAY BETWEEN 5 TO 15 KTS BY THE AFTERNOON.  
 
AVERY/BMICKELSON  
 

 
   
GLASGOW WATCHES/WARNINGS/ADVISORIES
 
 
DENSE FOG ADVISORY UNTIL 11 AM MDT TUESDAY FOR CENTRAL AND  
SOUTHEAST PHILLIPS...CENTRAL AND SOUTHERN VALLEY...DANIELS...  
EASTERN ROOSEVELT...NORTHERN PHILLIPS...NORTHERN VALLEY...  
SHERIDAN...WESTERN ROOSEVELT.  
 

 
 

 
 
WEATHER.GOV/GLASGOW  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab MT Page Main Text Page