437
FXUS63 KDVN 210240
AFDDVN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
940 PM CDT SUN SEP 20 2026
KEY MESSAGES
- AN UPPER LOW WILL CONTINUE TO SPIN NEAR OUR LOCAL AREA THROUGH
TUESDAY MORNING, LEADING TO OCCASIONAL SHOWERS AND CONTINUED
COOL AND CLOUDY CONDITIONS.
- EXPECTATIONS FOR SEVERAL BEAUTIFUL EARLY FALL DAYS ARE GROWING
FOR MID WEEK, WITH HIGHS IN THE 60S AND LOWS IN THE 40S/50S.
SHORT TERM /THROUGH MONDAY NIGHT/
ISSUED AT 117 PM CDT SUN SEP 20 2026
THE ONGOING AREAL FLOOD WARNINGS WILL CONTINUE THROUGH EARLY
AFTERNOON, AS SEVERAL CREEKS ARE KNOWN TO BE FLOODING IN EASTERN
IOWA, INCLUDING INDIAN CREEK IN LINN COUNTY. THOUGH SOME FLOODING
WILL CONTINUE, THE WATER WAS REPORTED TO HAVE STOPPED RISING EARLY
THIS MORNING, AND IMPACTS WILL BE IMPROVING THIS AFTERNOON/EVENING,
RESULTING IN EXPIRATIONS OF THE FLOOD WATCH, AND AREAL FLOOD
WARNINGS.
ADDITIONAL RAIN THE NEXT 24 HOURS. IN THE SHORT TERM WILL BE VERY
LIGHT, AND UNDER 0.25 WITH CERTAINTY. HOWEVER, AS IS OFTEN THE CASE
IN COOL SEASON EVENTS, THIS WILL BE A HIGH POP, LOW QPF EVENT TODAY,
AND AGAIN MONDAY/MONDAY NIGHT LEADING TO AN OVERALL WET PERIOD
CONTINUING THROUGH THROUGH TUESDAY MORNING.
TONIGHT THROUGH MONDAY NIGHT, GENERALLY COOL, CLOUDY CONDITIONS WITH
NORTHEAST WINDS AT 10 TO 15 MPH WILL CONTINUE. LOWS IN THE UPPER
40S TO MID 50S CAN BE EXPECTED. HIGHS UNDER THE CLOUDS, MUCH LIKE
TODAY, WILL STRUGGLE TO REACHING THE MID 60S.
LONG TERM /TUESDAY THROUGH SUNDAY/
ISSUED AT 117 PM CDT SUN SEP 20 2026
THE MID WEEK, THE FLOW ALOFT IS LESS PREDICTABLE IN A MESSY BLOCKY
PATTERN, BUT FOR US, THE SURFACE IS EXPECTED TO BE MAINLY DRY, WITH
TEMPERATURES RISING TO THE MID 60S TO LOWER 70S, AND LOWS IN THE 40S
TO MID 50S.
LOOKING OUT TOWARDS NEXT WEEKEND, WE ARE EXPECTING TEMPERATURES TO
WARM INTO THE UPPER 60S TO MID 70S, WHICH IS NEAR SEASONAL
NORMALS.
AVIATION /00Z TAFS THROUGH 00Z TUESDAY/
ISSUED AT 715 PM CDT SUN SEP 20 2026
WIDESPREAD LOW STRATUS WILL CONTINUE OVER EASTERN IOWA AND
NORTHWEST ILLINOIS, RESULTING IN PERIODS OF MVFR/IFR CEILINGS.
THE MOST LIKELY AREA FOR PERIODS OF IFR ARE AT BRL WITH MLI ON
THE NORTHERN PERIPHERY. PATCHY DRIZZLE IS ALSO POSSIBLE
OVERNIGHT INTO MONDAY AM. OTHERWISE, STEADY NORTHEAST TO EAST-
NORTHEAST WINDS WILL CONTINUE THROUGH MONDAY (WITH GUSTS AROUND
20 KTS AT TIMES).
DVN WATCHES/WARNINGS/ADVISORIES
IA...NONE.
IL...NONE.
MO...NONE.
SHORT TERM...ERVIN
LONG TERM...ERVIN
AVIATION...UTTECH
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