339
FXUS63 KAPX 130344
AFDAPX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GAYLORD MI
1144 PM EDT SUN APR 12 2026
KEY MESSAGES
- FLOODING CONCERNS THROUGH AT LEAST MIDWEEK, PARTICULARLY
ACROSS EASTERN UPPER AND FAR NORTHERN LOWER MICHIGAN WHERE
SNOWPACK MELTOFF MAY AGITATE ALREADY ELEVATED WATER LEVELS.
- RAIN AND THUNDER, HEAVY AT TIMES, TO CONTINUE OVERSPREADING
THE REGION AND LASTING THROUGH TONIGHT.
- ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS MONDAY NIGHT INTO
TUESDAY. HEAVY RAIN POSSIBLE AGAIN. POTENTIAL FOR SEVERE
THUNDERSTORMS LATER MONDAY NIGHT AND AGAIN TUESDAY.
- ABOVE NORMAL TEMPERATURES THROUGH THE WEEK, TRENDING BACK
BELOW NORMAL NEXT WEEKEND.
DISCUSSION
ISSUED AT 353 PM EDT SUN APR 12 2026
PATTERN SYNOPSIS: THE MAJORITY OF THE FORECAST PERIOD CONTINUES TO
BE DOMINATED BY A RELATIVELY SHALLOW TROF WEST/RIDGE EAST
CONFIGURATION ACROSS MUCH OF NORTH AMERICA. THE FLOW IS SPLIT AT
TIMES, THOUGH WHEN THIS OCCURS FORECAST AREA IS STILL UNDER THE
INFLUENCE OF THE WARMER SOUTHERN BRANCH. THE SOUTHWESTERLY UPSTREAM
FLOW THIS WEEK WILL TRANSPORT AN UNSEASONABLY MOIST AIR MASS INTO
THE AREA, WITH EMBEDDED DISTURBANCES BRINGING PERIODIC CHANCES OF
SHOWERS AND SOME THUNDERSTORMS.
FORECAST DETAILS: IMPRESSIVE RAINFALL HAS BEEN FALLING ACROSS MUCH
OF NORTHERN LOWER MICHIGAN FOR MOST OF THE DAY AND CONTINUES AT THIS
HOUR. WATER VAPOR IMAGERY SHOWS A GOOD TROPICAL CONNECTION OF
MOISTURE STREAMING UP FROM THE GULF IN DEEP SOUTHERLY FLOW.
PRECIPITABLE WATER VALUES OVER THE AREA ARE AN UNSEASONABLY MOIST
1.5" OR SO. THERE SHOULD BE A BRIEF LULL IN THE HEAVIER RAINFALL
THIS EVENING AS A DISTURBANCE DEPARTS THE AREA, BUT AN MCV MOVING
OUT OF THE MID-MISSISSIPPI VALLEY WILL BE QUICKLY ON ITS HEELS
TONIGHT.
A BIGGER LULL IN THE SHOWER/STORM RISK IS ANTICIPATED FOR MOST OF
MONDAY/MONDAY EVENING AS SHORT WAVE RIDGING BUILDS ACROSS THE AREA.
INTENSE CONVECTION IS EXPECTED TO DEVELOP OVER THE UPPER MIDWEST
LATE MONDAY, MOVING ACROSS THE FORECAST AREA IN A WEAKER STATE AFTER
MIDNIGHT MONDAY NIGHT/EARLY TUESDAY. THAT BEING SAID, SIGNIFICANT
ELEVATED INSTABILITY WILL HAVE STRONGER STORMS CAPABLE OF PRODUCING
SEVERE HAIL. THIS CONVECTION WILL LIKELY PUSH A STALLED
SOUTHWEST/NORTHEAST ORIENTED FRONTAL BOUNDARY SOUTHEAST INTO LOWER
MICHIGAN WHICH WILL SERVE AS A FOCUS FOR ADDITIONAL CONVECTION LATER
WEDNESDAY INTO THURSDAY.
ANOTHER BREAK IN THE RAINFALL THREAT IS ANTICIPATED THURSDAY NIGHT
INTO FRIDAY. THE NEXT DISTURBANCE ARRIVES BY SATURDAY WITH A RENEWED
RISK FOR WIDESPREAD RAINFALL.
EXPANDED FLOOD WATCH TO ENCOMPASS THE ENTIRE FORECAST AREA INTO
WEDNESDAY MORNING. THIS IS TO ACCOUNT FOR THE RAIN THAT HAS JUST
FALLEN AS WELL AS WHAT IS EXPECTED INTO MIDWEEK. THERE HAVE ALREADY
BEEN REPORTS OF LOCALIZED FLOODING AND RIVER/STREAM LEVELS ARE
NOTABLY RISING ACROSS MUCH OF THE AREA.
AVIATION /06Z TAFS THROUGH 06Z TUESDAY/
ISSUED AT 1138 PM EDT SUN APR 12 2026
MORE MVFR TO IFR CONDITIONS EXPECTED THIS MORNING UNDER LOW
CIGS AND AREAS OF MIST/FG. ATTENDANT AREA OF SHOWERS WILL
GRADUALLY END FROM WEST TO EAST HEADING THROUGH EARLY THIS
MORNING. SOME IMPROVEMENT THIS AFTERNOON AS CIGS RISE AND
SCATTER OUT. NEXT ROUND OF SHOWERS/EMBEDDED THUNDERSTORMS AND
INCREASINGLY LOWER CIGS SET TO ARRIVE LATER THIS EVENING.
SOUTHWEST WINDS WILL BE A BIT GUSTY THIS MORNING, WITH WINDS
VEERING TO NORTHWEST AND DECREASING THIS AFTERNOON. LIGHT WINDS
THIS EVENING. LOW LEVEL WIND SHEAR COMES TO AN END EARLY THIS
MORNING.
APX WATCHES/WARNINGS/ADVISORIES
MI...FLOOD WATCH THROUGH WEDNESDAY MORNING FOR MIZ016>018-020>036-
041-042-086>088-095-096-099.
MARINE...SMALL CRAFT ADVISORY UNTIL 11 AM EDT MONDAY FOR LHZ345>349.
SMALL CRAFT ADVISORY UNTIL 11 AM EDT MONDAY FOR LMZ323-341-342-
344>346.
SMALL CRAFT ADVISORY UNTIL 11 AM EDT MONDAY FOR LSZ321-322.
DISCUSSION...PBB
AVIATION...MSB
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