138
FXUS63 KDLH 070505
AFDDLH

Area Forecast Discussion
National Weather Service Duluth MN
1205 AM CDT Wed May 7 2025

.KEY MESSAGES...

- Very low humidity each afternoon will drive elevated fire
  weather conditions.

- Cooler, near normal temps Wednesday and Thursday. Above normal
  temps return Friday.

- There is a small chance (15 to 25 percent) for rain showers
  Friday evening/night, but widespread precipitation is not
  expected.

&&

.DISCUSSION...
Issued at 312 PM CDT Tue May 6 2025

TODAY THROUGH WEDNESDAY...Early afternoon satellite imagery
showed mostly clear skies across the region. A weak cold front
evident by a wind shift was approaching from the northwest, with
some clouds trailing this surface front. There were a few
returns on radar, but cloud bases were at or above 10kft, so
nothing more than sprinkles is expected as it moves through.
This cold front will bring northeast winds before it washes out
along with and slightly cooler temperatures for Wednesday. Highs
will generally be in the mid 60s across the region, with
northeast winds keeping temperatures closer to 50 along the
lakeshore. This dry air mass will once again lead to low
humidity both this afternoon and on Wednesday. A few locations
could see RH values drop into the teens, and on Wednesday the
mid 20s. Fortunately winds will be light.

THURSDAY THROUGH TUESDAY...Surface return flow on Thursday will
bring slightly warmer temperatures, and this trend will
continue through the weekend as the overall upper level pattern
builds another ridge across the Central CONUS. Another weakening
frontal boundary will move through on Friday, and will bring a
small chance (15 to 25 percent) for rain showers. Temperatures
will warm again over the weekend as that weak front lifts
northward again. The only difference this time around is
southerly winds will be a bit stronger, the low level thermal
ridge will be warmer, and the end result is highs in the low to
mid 80s, possibly warmer, for early next week.

&&

.AVIATION /00Z TAFS THROUGH 00Z THURSDAY/...
Issued at 1204 AM CDT Tue May 6 2025

VFR conditions through the forecast period. Winds will veer
easterly and east-southeasterly Wednesday. There may be a brief
period of LLWS at DLH before 08Z as winds aloft are expected to
veer into better alignment with the surface winds by that time.
Efficient mixing is expected again Wednesday afternoon which
should result in gusty winds.

&&

.MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 312 PM CDT Tue May 6 2025

A weak frontal boundary will move across the region this
evening, bringing northwest winds. These winds will become more
northeast tonight into Wednesday which may create conditions
hazardous to small craft in the Twin Ports and along the South
Shore east of the Bayfield Peninsula late tonight into
Wednesday. Northeast winds will continue Wednesday night into
Thursday, eventually becoming more southerly on Friday.

For the open water discussion, refer to the NWS Marquette Area
Forecast Discussion at weather.gov/mqt.

&&

.DLH WATCHES/WARNINGS/ADVISORIES...
MN...None.
WI...None.
MARINE...Small Craft Advisory until 7 PM CDT Wednesday for LSZ121-
     146>148-150.
     Small Craft Advisory from 10 AM to 5 PM CDT Wednesday for
     LSZ144-145.

&&

$$

DISCUSSION...WFO MPX
AVIATION...Huyck
MARINE...WFO MPX