Waterloo, Iowa 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

399
FXUS63 KDMX 040902
AFDDMX

Area Forecast Discussion
National Weather Service Des Moines IA
402 AM CDT Wed Jun 4 2025

.KEY MESSAGES...

- Patchy fog early this morning. Return of smoke, especially
  east and southeast, today into tonight. Air Quality Alert from
  the Iowa DNR remains in effect until 6 AM Thursday for the
  entire state.

- Dry today. Showers, few non-severe thunderstorms return at
  times Thursday-Friday.

- Cooler temperatures today into the end of the week with highs
  in the 70s.

&&

.UPDATE...
Issued at 327 AM CDT Wed Jun 4 2025

Cold front has cleared the state but lingering moisture left in
place behind the rain yesterday along with light winds has
allowed for patchy fog development early this morning. A few
locations have seen visibility drops below 1 mile, notably in
the Nish Valley. This fog will gradually clear around sunrise.
In addition, RAP/HRRR smoke output and observations suggest
smoke has returned in the wake of the front with some visibility
reductions noted in portions of eastern to northeastern Iowa.
A high pressure moving into the area will help push this smoke
south and east through the day today with any lingering impacts
confined to east/southeast areas, though the Air Quality Alert
from the Iowa DNR remains in place for the entire state until 6
AM Thursday. Otherwise today will be dry and cooler with highs
in the 70s. Showers and a few storms return to the forecast at
times on Thursday into Friday. Forcing overall remains weaker
with lingering timing discrepancies amongst models and CAMs. It
will by no means be a wash out to end the week, more scattered
showers and occasional storms at times. Any storms look to be
mostly confined to Friday when there is more instability, but
any hazards would primarily be lightning as severe storms are
not expected at this time.

&&

.DISCUSSION...
Issued at 1251 PM CDT Tue Jun 3 2025

While rain has helped to clear out much of the upper level smoke
seen over the last several days, pockets of decreased air quality
exist in Iowa and the Iowa DNR has issued an Air Quality Alert
through Thursday morning. Behind the front temperatures are falling.
At noon temperatures in northwest Iowa were in the low 50s
while southwest Iowa ahead of the front was still in the low
70s. Temperatures through the rest of the week and into the
weekend will remain more mild in the mid 70s.

By late week an open wave will reach the midwest and bring the next
window for showers and thunderstorms to Iowa. Timing
differences exist with the GFS bringing precipitation by
Thursday with the EC delayed until Friday. Right now forcing is
not well defined into Iowa within the system and organized
convection for stronger storms is not anticipated. The wave
should lift out of the area by this weekend but timing will be
better refined in the coming days.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 1036 PM CDT Tue Jun 3 2025

Conditions have improved across the majority of terminals this
morning, with remaining patchy fog and low ceilings expected
until about sunrise at KOTM. Otherwise, high clouds are expected
Wednesday with light winds gradually shifting southeast to east.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

UPDATE...05
DISCUSSION...Hagenhoff
AVIATION...Bury