654
FXUS63 KFGF 021853
AFDFGF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND FORKS ND
1253 PM CST MON MAR 2 2026
KEY MESSAGES
- WARMER THAN NORMAL TEMPERATURES WITH AREAS OF FOG ARE EXPECTED THIS
WEEK.
- THERE IS A 20% CHANCE FOR ADVISORY IMPACTS FROM A WINTRY MIX THURSDAY
NIGHT INTO FRIDAY.
- A MORE ACTIVE PATTERN MAY CONTINUE INTO NEXT WEEK BRINGING
ADDITIONAL OPPORTUNITIES FOR WINTER IMPACTS OVER PARTS OF THE
REGION. PREDICTABILITY IN IMPACTS REMAINS VERY LOW BEYOND
FRIDAY.
DISCUSSION
ISSUED AT 1254 PM CST MON MAR 2 2026
..SYNOPSIS
TEMPERATURES WILL WIDELY VARY THIS WEEK AS A COMBINATION OF THE
UPPER LEVEL PATTERN AND SURFACE SNOWPACK WORK IN TANDEM TO BRING A
VARIETY OF VALUES FROM LOCATION TO LOCATION ON ANY GIVEN DAY,
AND DAY TO DAY AT ANY GIVEN POINT. RIDING A BAROCLINIC ZONE IN
ZONAL/SPLIT FLOW FOR MUCH OF THE WEEK, TEMPERATURES WILL HINGE
ON WHICH SIDE OF THE GRADIENT ONE RESIDES. LUCKILY THROUGH
THURSDAY, VERY FEW WAVES OF IMPORTANCE LOOK TO TRACK THOUGH,
WHICH SHOULD KEEP WEATHER CONDITIONS FAIRLY QUIET. UPPER LEVEL
FLOW TURNS SOUTHWESTERLY LATE IN THE WEEK. THIS WILL BRING OUR
NEXT REAL SHOT AT ANY IMPACTFUL WEATHER. THE OVERALL SYNOPTIC
PATTERN BECOMES MUCH LESS PREDICTABLE BY THE WEEKEND, WITH
ENSEMBLES POORLY HANDLING HOW AN AREA OF LOW PRESSURE MAY (OR
MAY NOT) BECOME CUT OFF OVER THE SOUTHWESTERN US. ONE TAKEAWAY
IS THAT WE APPEAR TO BECOME MORE ACTIVE - THE PROBLEM IS THAT
THERE ARE VERY FEW DETAILS THAT CAN BE ADDED BEYOND THAT WITH
SUCH LITTLE RUN TO RUN MODEL CONSISTENCY.
..WARM WITH PATCHY FOG THIS WEEK
SOUTHERLY SURFACE FLOW OVER MUCH OF THE NORTHERN PLAINS IS ADVECTING
WARMER AIR, ALONG WITH HIGHER DEW POINTS NORTH. THIS HAS LED TO
TEMPERATURES IN THE 30S NEARLY AREA WIDE THIS AFTERNOON. FURTHER
MELTING OF SNOW WILL LEAD TO ADDITIONAL MOISTURE BEING ADDED TO THE
BOUNDARY LAYER. AS COLDER AIR ADVECTS IN FROM THE NORTH TONIGHT, THE
COLDER AIR OVER THE RELATIVELY WARMER SNOWPACK SHOULD LEAD TO PATCHES
OF FOG. RIDING THE BAROCLINIC ZONE THROUGH THURSDAY OR SO IN
ZONAL FLOW, TEMPERATURES WILL VARY WIDELY. FOR EXAMPLE, BEING
MORE SO ON THE COLDER SIDE OF THE GRADIENT TUESDAY, TEMPERATURES
WILL STRUGGLE TO REACH FREEZING OVER THE NORTHERN HALF OF THE
FA, WHILE STILL NEARLY FLIRT WITH 50 IN THE FAR SOUTH. SOUTHERLY
FLOW RETURNS ON WEDNESDAY, WHICH IS WHEN THE WARMEST
TEMPERATURES OF THE WEEK LOOK TO OCCUR. VALUES NEAR 60 ARE
FORECASTED IN THE SOUTH. MEANWHILE ALONG THE INTERNATIONAL
BORDER, TEMPERATURES WILL HOLD THE LINE AT ABOUT FREEZING.
CONCEPTUALLY, THIS PATTERN SHOULD ALSO LEAD TO FOG NEARLY EVERY
NIGHT, VARYING IN LOCATION DEPENDING ON THE EXACT PLACEMENT OF
COLDER AIR, HOW FAR NORTH SOUTHERLY SURFACE FLOW RESIDES, WHERE
SNOWPACK EXISTS ETC.
..WINTRY MIX THURSDAY NIGHT INTO FRIDAY
TROUGHING OVER THE WESTERN US BY LATE WEEK SETS THE STAGE FOR
MORE ACTIVE WEATHER IN THE NORTHERN PLAINS THURSDAY NIGHT INTO
FRIDAY. THERE REMAINS SOME UNCERTAINTY HOWEVER, IN HOW THE
NORTHERN AND SOUTHERN BRANCHES OF THE JET PHASE, WHICH WILL
HEAVILY INFLUENCE WHAT KIND OF SENSIBLE WEATHER AND IMPACTS WE
RECEIVE. THERE HAS BEEN A TREND IN RECENT GUIDANCE TO BRING MORE
(ALBEIT STILL LIGHT) PRECIPITATION TO MUCH OF THE FA,
PARTICULARLY ON FRIDAY. THIS PRECIP HAPPENS AS THE NORTHERN
STREAM OF THE JET KEEPS A BULK OF FORCING (AND COOLER AIR) TO
THE NORTH. AS THE SOUTHERN PIECE LIFTS NORTH, WAA AND
FRONTOGENSIS DRIVES AN AREA OF RAIN/FREEZING RAIN/SLEET/SNOW.
WHERE THIS SETS UP - EXTREMELY HARD TO SAY THIS FAR OUT. WAVE
INTERACTIONS SUCH AS THIS CARRY A SHORTER PREDICTABILITY
HORIZON. HOWEVER, THIS WILL BE SOMETHING TO WATCH THROUGH THE
WEEK. RIGHT NOW, THE CHANCE FOR ADVISORY LEVEL IMPACTS DRIVEN BY
FREEZING RAIN IS ABOUT 20%.
..ADDITIONAL SYSTEMS IN THE LATE FORECAST PERIOD
AS WE REMAIN IN A GENERAL TROUGH WEST, RIDGING EAST PATTERN FOR
EARLY NEXT WEEK, ADDITIONAL WAVES AND PRECIPITATION ARE LIKELY.
HOWEVER, DAY TO DAY THIS EVOLUTION REMAINS HIGHLY UNCERTAIN,
WITH THE TIMING AND STRENGTH OF WAVES DRIVING WHAT WILL OCCUR.
TO GIVE CONTEXT ABOUT HOW UNCERTAIN THE DAY TO DAY PATTERN IS,
NBM 25TH TO 75TH TEMPERATURE SPREADS ARE UPWARDS OF 20 DEGREES
IN SPOTS SUNDAY INTO TUESDAY OF NEXT WEEK. WITHOUT ANY MODEL TO
MODEL OR RUN TO RUN CONSISTENCY, ITS HARD TO DETERMINE WHAT
SENSIBLE WEATHER WILL DO DAY TO DAY. CHECK BACK IN THE COMING
DAYS FOR UPDATES.
AVIATION /18Z TAFS THROUGH 18Z TUESDAY/
ISSUED AT 1113 AM CST MON MAR 2 2026
WE HAVE A FRONT COMING THROUGH THE REGION THIS EVENING AND
OVERNIGHT WHICH WILL BRING STRATUS AND FOG TO THE REGION. THE
QUESTION IS: WHICH ONE WILL IT BE? AT LEAST UNTIL THEN, EXPECT
VFR CONDITIONS TO PREVAIL UNTIL THIS FRONT ARRIVES. AS IT DOES,
CEILINGS WILL BE EXPECTED TO BECOME VERY LOW TO AT LEAST IFR,
WITH SOME SIGNALS TO PUSH INTO LIFR. AREAS OF FOG ARE EXPECTED
TO DEVELOP IN TANDEM WITH THIS, BUT CONFIDENCE IN SEVERITY IS
LOW. WE SHOULD SEE SOME IMPROVEMENTS TOWARDS THE END OF THE TAF
PERIOD AS THE SUN RISES AND MIXING IMPROVES. WINDS WILL REMAIN
FAIRLY BENIGN AND SUSTAINED BELOW 10 KNOTS, SO IMPACTS WILL
REMAIN LIMITED TO FOG/STRATUS.
FGF WATCHES/WARNINGS/ADVISORIES
ND...NONE.
MN...NONE.
DISCUSSION...RAFFERTY
AVIATION...PERROUX
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