341
FXUS63 KDLH 060539
AFDDLH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
1239 AM CDT SAT SEP 6 2025
KEY MESSAGES
- GALE WARNING AND SMALL CRAFT ADVISORY EARLY THIS MORNING FOR
PORTIONS OF WESTERN LAKE SUPERIOR.
- FROST ADVISORY THIS MORNING FOR PORTIONS OF NORTHEAST
MINNESOTA, INCLUDING THE ARROWHEAD, IRON RANGE AND BORDERLANDS
AREAS.
- CONTINUED COOL ON TODAY WITH SCATTERED RAIN SHOWERS AND A FEW
EMBEDDED THUNDERSTORMS.
- FROST WILL BE A CONCERN ON TONIGHT AND SUNDAY NIGHT BEFORE
TEMPERATURES WARM LATER NEXT WEEK.
DISCUSSION
ISSUED AT 121 PM CDT FRI SEP 5 2025
ISSUED A FROST ADVISORY FOR TONIGHT INTO SATURDAY MORNING FOR
PORTIONS OF NORTHEAST MINNESOTA, INCLUDING THE ARROWHEAD, IRON
RANGE AND BORDERLANDS AREAS, NAMELY INLAND LAKE AND COOK
COUNTIES, NORTHERN AND CENTRAL ST. LOUIS COUNTY, KOOCHICHING AND
NORTHERN ITASCA COUNTIES. GIVEN WHAT WILL BE A VERY COOL START
TO THE EVENING, FROST IS LIKELY FOR THE ABOVE AREAS WITH LIGHT
WINDS WITH A REDUCED PRESSURE GRADIENT AND CLEARING SKIES AS
WRAP AROUND MOISTURE PUSHES EAST THROUGH THE EVENING AND NIGHT.
SOME MID LEVEL CLOUD COVER IS EXPECTED THROUGH THE NIGHT,
HOWEVER, THE COOL START TO THE EVENING SHOULD MAKE LOW
TEMPERATURES IN THE LOWER TO MID 30S VERY ACHIEVABLE. ELSEWHERE
ACROSS NORTHEAST MINNESOTA AND NORTHWEST WISCONSIN, THE FROST
THREAT IS NOT ZERO, AND WILL BE LARGELY DEPENDENT ON HOW FAST
WINDS AND CLOUDS DECREASE THIS EVENING. AN EXPANSION OF THE
FROST ADVISORY IS NOT OUT OF THE QUESTION.
FURTHERMORE, THERE IS ALSO A NON-ZERO CHANCE FOR A FEW
SNOWFLAKES FROM FADING RAIN SHOWERS NEAR SUNSET THIS EVENING.
ANOTHER COOL DAY IS FORECAST ON SATURDAY ACROSS THE NORTHLAND
WITH CYCLONIC FLOW ALOFT, AND ONE MORE STRONGER EMBEDDED SHORTWAVE
THAT WILL SUPPORT ANOTHER ROUND OF SCATTERED RAIN SHOWERS. A
BIT MORE INSTABILITY WILL BE IN PLACE ON SATURDAY, SO A FEW NON-
SEVERE THUNDERSTORMS ARE POSSIBLE WITH PEAK DAYTIME HEATING.
HIGH TEMPERATURES ON SATURDAY WILL BE IN THE UPPER 50S TO THE
LOWER 60S, WHICH ARE ABOVE RECORD LOW MAX TEMPERATURES FOR
SATURDAY. FROST WILL ALSO BE POSSIBLE SATURDAY AND SUNDAY NIGHTS
POTENTIALLY ACROSS A LARGER PORTION OF NORTHEAST MINNESOTA AND
NORTHWEST WISCONSIN, BUT, WILL BE DEPENDENT ON CLOUD COVER.
CYCLONIC FLOW ALOFT WILL BECOME MORE ZONAL MONDAY INTO TUESDAY
MARKING A MODERATION IN TEMPERATURES BACK TO NEAR NORMAL IN THE
UPPER 60S AND LOWER 70S. THIS WILL ALSO TEMPORARILY REDUCE THE
OVERNIGHT FROST THREAT AS WELL. THE TIMING AND AMPLITUDE OF THE
SHORTWAVE ON TUESDAY, AND ITS ASSOCIATED RAIN SHOWER AND
THUNDERSTORM THREAT, HAS SOME DIFFERENCES ACROSS THE GLOBAL
ENSEMBLE SUITES TO SORT OUT OVER THE NEXT FEW DAYS.
AVIATION /06Z TAFS THROUGH 06Z SUNDAY/
ISSUED AT 1239 AM CDT SAT SEP 6 2025
SKIES GRADUALLY CLEAR EARLY THIS MORNING FROM NORTHWEST TO
SOUTHEAST. WINDS WILL WEAKEN OVERNIGHT ALTHOUGH CALM CONDITIONS
ARE NOT EXPECTED. AN UPPER-LEVEL TROUGH WILL MOVE SOUTHEASTWARD
ACROSS THE TERMINALS LATER THIS MORNING THROUGH THE AFTERNOON.
MVFR CEILINGS, SCATTERED RAIN SHOWERS, AND GUSTY WINDS WILL
ACCOMPANY THE TROUGH. CONDITIONS IMPROVE AGAIN TONIGHT WITH
WINDS DECREASING AND CLEARING SKIES.
MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/
ISSUED AT 1239 AM CDT SAT SEP 6 2025
GUSTY NORTHWEST WINDS WILL CONTINUE TO GRADUALLY WEAKEN
OVERNIGHT. GALE WARNING REMAINS IN EFFECT UNTIL 4 AM FOR PORT
WING TO SAND ISLAND AND THE OUTER APOSTLE ISLANDS. THE SMALL
CRAFT ADVISORY WILL EXPIRE FOR TACONITE HARBOR TO DULUTH TO PORT
WIND AT 1 AM. SMALL CRAFT ADVISORY CONTINUES FOR TACONITE
HARBOR TO GRAND PORTAGE AND FROM SAND ISLAND TO SAXON HARBOR.
WINDS ALONG THE NORTH SHORE ARE FORECAST TO STRENGTHEN AGAIN
OVERNIGHT AND BECOME HAZARDOUS ONCE AGAIN. WIND GUSTS AND WAVE
HEIGHTS OF 3 TO 6 FEET FOR PORTIONS OF THE SOUTH SHORE WARRANT
KEEPING THE ADVISORY THERE UNTIL LATER THIS MORNING. WINDS BACK
WESTERLY TODAY AS A WEAK TROUGH PASSES ACROSS THE WATERS AND
WILL VEER NORTHWEST AGAIN TONIGHT. WIND SPEEDS WILL INCREASE
SLIGHTLY TONIGHT AND ADDITIONAL HEADLINES MAY BECOME NECESSARY.
SUNDAY SHOULD BE QUIETER WITH WINDS BACKING SOUTHWEST AND
WEAKENING.
FOR THE OPEN WATER DISCUSSION, REFER TO THE NWS MARQUETTE AREA
FORECAST DISCUSSION AT WEATHER.GOV/MQT.
DLH WATCHES/WARNINGS/ADVISORIES
MN...FROST ADVISORY UNTIL 9 AM CDT THIS MORNING FOR MNZ010>012-018-
019.
WI...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 5 AM CDT EARLY THIS MORNING FOR
LSZ121-140-141-147-148.
SMALL CRAFT ADVISORY UNTIL 1 AM CDT EARLY THIS MORNING FOR
LSZ142>145.
GALE WARNING UNTIL 5 AM CDT EARLY THIS MORNING FOR LSZ146-150.
DISCUSSION...PA
AVIATION...HUYCK
MARINE...HUYCK
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