FXUS63 KGRB 221745

AFDGRB



Area Forecast Discussion

National Weather Service Green Bay WI

1245 PM CDT Sun Mar 22 2026



Updated aviation portion for 18Z TAF issuance



.KEY MESSAGES...



- Snowmelt will cause increased flows and rising levels on rivers

  and streams. Several rivers may reach bankfull or even minor 

  flood stage within the next couple days.



- Temperatures will cool to near normal today, then rise to above

  normal again during the middle of next week.



- A wintry mix of precipitation is possible during the middle of 

  next week, with the most widespread coverage occurring Wednesday

  night into Thursday.



&&



.DISCUSSION...

Issued at 1258 AM CDT Sun Mar 22 2026



A cold front is currently making its way through northern

Wisconsin early this morning, which will bring a period of post-

frontal precipitation to the region this morning. Precipitation

type is expected to mainly be rain; however, snow could mix in or

changeover completely across north-central Wisconsin. The brief

period this precipitation is expected to occur should keep the

impacts from any frozen precipitation to a minimum. The

precipitation should end by mid to late morning as high pressure

builds in across the northern Great Lakes region. Although skies

will clear out some by this afternoon, the push of cold air behind

the front will keep high temperatures in the 30s and 40s.



The aforementioned high pressure will provide mainly dry weather 

and seasonable temperatures tonight and Monday. Small 

precipitation chances occur at times across mainly northern 

Wisconsin from late Monday night through Wednesday, with perhaps 

more widespread precipitation occurring as another clipper system 

and cold front move through Wednesday night into Thursday. A 

wintry mix of rain/snow and possible freezing rain is expected 

through this period. Mild temperatures are expected mid-week, with

highs reaching into the 40s and lower 50s from Tuesday through 

Thursday. High pressure brings mainly dry conditions and 

seasonable temperatures back to the region Friday and Saturday.



&&



.AVIATION...for 18Z TAF Issuance

Issued at 1239 PM CDT Sun Mar 22 2026



Low clouds (mostly MVFR) were breaking up over central, northeast

and east central WI, but were holding tough over the north 

central part of the state. Suspect even north central WI will

scatter out later this afternoon and evening, but there are 

indications that MVFR ceilings may move back into that region 

(including the RHI TAF site) overnight into early Monday. Gusty

north winds will subside later this afternoon/early evening,

then pick up a little again by mid to late morning on Monday.



&&



.HYDROLOGY...

Issued at 1258 AM CDT Sun Mar 22 2026



Despite cooler temperatures, the snowpack will continue to melt

across the region. This will result in increasing flows and 

rising river levels. Modeled snowpack temperature from the NOHRSC 

site points to widespread ripening of the snowpack, and higher 

susceptibility of melting. However, the lack of a prolonged 

significant warmup (and nighttime temperatures dropping below 

freezing most nights) points to a more gradual rise in area rivers

as opposed to widespread rapid rise flooding. Some rivers will 

likely reach bankfull or even minor flood stage within the next 

couple days.



The flooding situation will be monitored closely given how much

water is locked up in the current snowpack across the region.

Fortunately, no significant precipitation events are expected

over the next week, so nearly all of the runoff will be

attributed to melting snow.



&&



.GRB WATCHES/WARNINGS/ADVISORIES...

None.



&&



$$



DISCUSSION.....Kurimski

AVIATION.......Kieckbusch

HYDROLOGY......Kurimski