675
FXUS63 KGRB 020454
AFDGRB
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
1154 PM CDT FRI MAY 1 2026
UPDATED AVIATION PORTION FOR 06Z TAF ISSUANCE
UPDATE
ISSUED AT 835 PM CDT FRI MAY 1 2026
NO CHANGES TO THE FREEZE WARNING THIS EVENING. SKIES HAVE
PARTIALLY CLEARED ACROSS THE AREA, BUT PATCHES OF MID-CLOUDS
REMAIN PRESENT. AS CLEARING GRADUALLY CONTINUES AND WINDS BECOME
CALM LATER THIS EVENING OR EARLY OVERNIGHT, TEMPS DO NOT HAVE FAR
TO FALL BEFORE REACHING FREEZING. PROBABILITIES OF REACHING 32
DEGREES GENERALLY RANGE FROM 80-100% ACROSS THE REGION, EXCEPT
OVER THE DOOR PENINSULA, BUT THAT'S WHERE 8 PM TEMPS ARE THE
COLDEST (WASHINGTON ISLAND/EGG HARBOR - 35 DEGREES).
KEY MESSAGES
- WIDESPREAD FREEZING TEMPERATURES OVERNIGHT TONIGHT MAY DAMAGE
ANY EARLY SEASON SENSITIVE VEGETATION WITH WARMING
TEMPERATURES THROUGH THE WEEKEND.
- PERIODIC SHOWER CHANCES SATURDAY NIGHT INTO NEXT WEEK,
INCLUDING POTENTIAL FOR A FEW STORMS ON MONDAY. HOWEVER, RAIN
AMOUNTS THROUGH THE FIRST HALF OF MAY LOOK AVERAGE TO BELOW
AVERAGE.
- TEMPERATURES WILL TREND BACK BELOW AVERAGE NEXT WEEK.
DISCUSSION
ISSUED AT 115 PM CDT FRI MAY 1 2026
TONIGHT: FROST/FREEZE POTENTIAL
SCATTERED SHOWERS, EVEN MIXED WITH SNOW IN SPOTS, WILL
GRADUALLY DIMINISH BY THIS EVENING ACROSS EASTERN WISCONSIN WITH
CLEARING EXPECTED FROM NORTH TO SOUTH. ISSUED A FREEZE WARNING
FOR SUSCEPTIBLE COUNTIES ACROSS CENTRAL INTO EAST-CENTRAL
WISCONSIN WITH HIGH (>70%) CHANCES FOR TEMPS BELOW FREEZING
EARLY SATURDAY. FOR PORTIONS OF THE FOX VALLEY AND IMMEDIATE
LAKESHORE AREAS, CHANCES ARE A BIT LOWER (30 TO 60%), BUT MOST
AREAS LIKELY WILL BE NEAR FREEZING.
RAINFALL POTENTIAL INTO NEXT WEEK
NORTHWEST FLOW ALOFT WILL PERSIST INTO NEXT WEEK WITH
INTERMITTENT SHOWER/STORM CHANCES DURING THIS TIME. SHOWER
CHANCES ARRIVE SATURDAY NIGHT INTO SUNDAY AS A WEAK TROUGH
IMPACTS THE AREA. WITH LIMITED MOISTURE AND INSTABILITY, AMOUNTS
LOOK LIGHT WITH GENERALLY LOW (20 TO 40%) CHANCES FOR 0.10
INCHES OR MORE.
A STRONGER COLD FRONT WILL MOVE THROUGH ON MONDAY WITH HIGHER
CHANCES (40 TO 70%) FOR SHOWERS AND A FEW STORMS. HOWEVER,
MOISTURE AND INSTABILITY WILL BE MODEST ACROSS THE AREA,
LIMITING THE RISK FOR MORE IMPACTFUL RAIN OR STRONGER STORMS.
LOW END CHANCES FOR SHOWERS WILL CONTINUE THROUGH THE WORK WEEK
AT TIMES AS EMBEDDED TROUGHS PROGRESS THROUGH THE LONGWAVE
TROUGH ACROSS THE GREAT LAKES. HOWEVER, OVERALL TRENDS SUGGEST
AVERAGE TO BELOW AVERAGE PRECIPITATION OVER THE NEXT TWO WEEKS.
TEMPS: WARMING THIS WEEKEND AND COOLER NEXT WEEK
TEMPERATURES WILL REBOUND THROUGH MONDAY, WITH MONDAY LIKELY THE
WARMEST DAY OVER THE NEXT WEEK, AHEAD OF A COLD FRONT. WITH THE
RETURN TO PRONOUNCED NORTHWEST FLOW ALOFT FOR MUCH OF THE REST
OF NEXT WEEK, BELOW AVERAGE TEMPS ARE FAVORED, WITH SOME
POTENTIAL FOR FROST/FREEZE CONCERNS FOR SUSCEPTIBLE AREAS NEXT
WEEK.
AVIATION
FOR 06Z TAF ISSUANCE
ISSUED AT 1153 PM CDT FRI MAY 1 2026
SKIES HAVE CLEARED ACROSS MOST OF THE REGION AS EXPECTED, EXCEPT
FOR A PATCH OF 7000-9000 FT CLOUDS OVER CENTRAL WI THAT WILL GRAZE
KAUW AND KCWA OVER THE NEXT 1-2 HOURS. REGARDLESS, GOOD FLYING
WEATHER IS EXPECTED INTO SATURDAY MORNING ACROSS THE REGION.
EXPECT FAIR WEATHER CLOUDS TO BUILD WITH THE HEAT OF THE DAY BY
LATE SATURDAY MORNING. SIMILAR TO WHAT OCCURRED OVER MINNESOTA,
CLOUD BASES SHOULD BE HIGH BASED AND COVERAGE SHOULD BE NOT AS
WIDESPREAD AS TODAY.
MID AND HIGH CLOUDS WILL INCREASE ON SATURDAY EVENING AHEAD OF THE
NEXT CLIPPER SYSTEM. LIGHT RAIN SHOWERS WILL BE APPROACHING
KRHI/KAUW/KCWA BY THE END OF THE TAF PERIOD AND HAVE INCLUDED A
PROB30 AT KRHI FOR -SHRA. NO DETERIORATION OF FLIGHT CONDITIONS
ARE EXPECTED.
LASTLY, LOW LEVEL WIND SHEAR WILL BE INCREASING OVER NORTH-CENTRAL
WI BY THE END OF THE TAF PERIOD AS WELL.
GRB WATCHES/WARNINGS/ADVISORIES
FREEZE WARNING UNTIL 8 AM CDT SATURDAY FOR WIZ022-030-031-
035>040-045-048>050.
UPDATE.........MPC
DISCUSSION.....JM
AVIATION.......MPC
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page