253
FNUS53 KDTX 210800
FWFDTX
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST MICHIGAN
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
400 AM EDT THU MAY 21 2026
DISCUSSION
HIGH PRESSURE WILL EXPAND ACROSS THE GREAT LAKES TODAY
AND HOLD OVER THE REGION THROUGH FRIDAY. THIS SYSTEM WILL SUSTAIN
COOL CONDITIONS WITH PERSISTENT EAST-NORTHEAST WINDS. THE DRIER
AIRMASS WILL KEEP MIN RH VALUES IN THE 40S TODAY. AN UPPER LEVEL
DISTURBANCE THEN DRIVES WIDESPREAD RAIN ACROSS THE REGION LATE
FRIDAY AND FRIDAY NIGHT. MILDER TEMPERATURES WITH SHOWER AND
THUNDERSTORMS CHANCES WILL PERSIST THROUGH THE WEEKEND.
MIZ047-048-053-060-061-212115-
MIDLAND-BAY-SAGINAW-SHIAWASSEE-GENESEE-
INCLUDING THE CITIES OF MIDLAND-BAY CITY-SAGINAW-OWOSSO-FLINT
400 AM EDT THU MAY 21 2026
TODAY
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT).
MAX TEMPERATURE.....54-60.
24 HR TREND......1 DEGREE COOLER.
MIN HUMIDITY........31-41 PERCENT.
24 HR TREND......3 PERCENT DRIER.
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH INCREASING TO 15 TO 20
MPH IN THE LATE MORNING AND AFTERNOON.
MIXING HEIGHT.......4150-4650 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH BECOMING EAST.
SMOKE DISPERSAL.....GOOD (597).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT).
MIN TEMPERATURE.....40-44.
24 HR TREND......3 DEGREES WARMER.
MAX HUMIDITY........72-82 PERCENT.
24 HR TREND......3 PERCENT DRIER.
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH.
MIXING HEIGHT.......900-1100 FT AGL.
TRANSPORT WINDS.....EAST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR (39).
PCPN AMOUNT.........NONE.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT).
MAX TEMPERATURE.....62-66.
24 HR TREND......6 DEGREES WARMER.
MIN HUMIDITY........32-42 PERCENT.
24 HR TREND......1 PERCENT DRIER.
20-FOOT WINDS.......EAST 15 TO 20 MPH.
MIXING HEIGHT.......3100-3600 FT AGL.
TRANSPORT WINDS.....EAST 15 TO 20 MPH.
SMOKE DISPERSAL.....EXCELLENT (602).
PCPN AMOUNT.........NONE.
MIZ049-054-055-062-212115-
HURON-TUSCOLA-SANILAC-LAPEER-
INCLUDING THE CITIES OF BAD AXE-CARO-SANDUSKY-LAPEER
400 AM EDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) UNTIL 2 PM, THEN
PARTLY CLOUDY (40-50 PERCENT). AREAS OF FROST
UNTIL 8 AM.
MAX TEMPERATURE.....54-58.
24 HR TREND......2 DEGREES COOLER.
MIN HUMIDITY........38-48 PERCENT.
24 HR TREND......4 PERCENT DRIER.
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH INCREASING TO 10 TO 15
MPH IN THE LATE MORNING AND AFTERNOON.
MIXING HEIGHT.......3730-4230 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH BECOMING EAST.
SMOKE DISPERSAL.....GOOD (534).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT).
MIN TEMPERATURE.....AROUND 41.
24 HR TREND......4 DEGREES WARMER.
MAX HUMIDITY........75-85 PERCENT.
24 HR TREND......4 PERCENT DRIER.
20-FOOT WINDS.......NORTHEAST 10 TO 15 MPH.
MIXING HEIGHT.......900-1100 FT AGL.
TRANSPORT WINDS.....EAST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR (36).
PCPN AMOUNT.........NONE.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT).
MAX TEMPERATURE.....60-64.
24 HR TREND......6 DEGREES WARMER.
MIN HUMIDITY........35-45 PERCENT.
24 HR TREND......1 PERCENT DRIER.
20-FOOT WINDS.......EAST 15 TO 20 MPH.
MIXING HEIGHT.......2700-3200 FT AGL.
TRANSPORT WINDS.....EAST AROUND 20 MPH.
SMOKE DISPERSAL.....GOOD (568).
PCPN AMOUNT.........NONE.
MIZ063-068>070-075-076-082-083-212115-
ST CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE-
INCLUDING THE CITIES OF PORT HURON-HOWELL-PONTIAC-WARREN-ANN
ARBOR-DETROIT-ADRIAN-MONROE
400 AM EDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) UNTIL 2 PM, THEN
PARTLY CLOUDY (25-35 PERCENT).
MAX TEMPERATURE.....60-64.
24 HR TREND......3 DEGREES WARMER.
MIN HUMIDITY........35-45 PERCENT.
24 HR TREND......4 PERCENT DRIER.
20-FOOT WINDS.......NORTHEAST 10 TO 15 MPH.
MIXING HEIGHT.......4050-4550 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH BECOMING EAST.
SMOKE DISPERSAL.....GOOD (585).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT).
MIN TEMPERATURE.....42-46.
24 HR TREND......5 DEGREES WARMER.
MAX HUMIDITY........68-78 PERCENT.
24 HR TREND......4 PERCENT DRIER.
20-FOOT WINDS.......NORTHEAST 10 TO 15 MPH.
MIXING HEIGHT.......530-730 FT AGL.
TRANSPORT WINDS.....EAST AROUND 15 MPH.
SMOKE DISPERSAL.....POOR (32).
PCPN AMOUNT.........NONE.
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT).
MAX TEMPERATURE.....64-68.
24 HR TREND......3 DEGREES WARMER.
MIN HUMIDITY........38-48 PERCENT.
24 HR TREND......1 PERCENT WETTER.
20-FOOT WINDS.......EAST 15 TO 20 MPH.
MIXING HEIGHT.......2990-3490 FT AGL.
TRANSPORT WINDS.....EAST AROUND 20 MPH.
SMOKE DISPERSAL.....EXCELLENT (630).
PCPN AMOUNT.........NONE.
FORECAST DAYS 3 THROUGH 7
SATURDAY
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE
LOWER 50S. HIGHS IN THE MID 60S. EAST WINDS AROUND 15 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S. SOUTHWEST WINDS AROUND
5 MPH.
MEMORIAL DAY
PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE MID
50S. HIGHS IN THE UPPER 70S. NORTHWEST WINDS AROUND 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS IN THE MID 50S. HIGHS AROUND 80.
WEDNESDAY
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS AROUND 80.
TF
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