Marine Forecasts

    EDIT      (on/off)   Help

---

7 Day Forecast for Marine Location Near Abrams, WI

   Hourly   EDIT   Help

---

Area Discussion for - Green Bay, WI

      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KGRB 242317 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 517 PM CST Fri Jan 24 2020

Updated aviation portion for 00Z TAF issuance

SHORT TERM. Tonight and Saturday Issued at 254 PM CST Fri Jan 24 2020

Vertically stacked low pressure continues to slowly work its way toward the area. Lull in the steadier precip will quickly be replaced by a large area of precip pushing in from the southeast associated with a plume of moisture and upper level shortwave energy rotates around the low (nicely shown on the GOES water vapor imagery).

Precip type will be challenging this evening as forecast soundings show enough cold air aloft for the precip to be snow; however, temps near the surface have climbed into the middle 30s across the Fox Valley and lake shore. This will lead to the precip starting as rain in many spots. Dynamical cooling and precip loading in the heavier precip will likely change the rain over to snow at times through early evening. But dewpoints at or above freezing and not a lot of cold air to transfer down could limit things. As the temp column slowly cools through the evening, a transition to mainly snow is expected. Snow totals look to be in the 1-3" range for most spots, but a couple spots could be closer to 4" if the snow transitions over quicker than anticipated. It will be a pretty wet snow, plus ground temps near freezing will promote some melting and compaction. If this event was not preceded by a couple rounds of accumulating snow, would lean towards issuing an advisory. But with totals under 3" expected for most locations and not much wind, will go the SPS route. Temps won't budge much through the night with lows in the upper 20s and lower 30s.

On Saturday, the low pressure will slowly track toward Lake Huron. Periods of light snow, drizzle and freezing drizzle is expected to continue. Additional snow accumulations look to be under an inch for most locations. With the thick cloud cover and light north winds, temps will remain in the 30s.

LONG TERM. Saturday Night Through Friday Issued at 254 PM CST Fri Jan 24 2020

No major weather systems in the long term forecast, main focus is on small snow/precip changes and temperatures trends.

Saturday evening . There will still be some mid-level energy wrapping around the departing low pressure system, keeping a chance of light pcpn in the forecast through Saturday night, especially across eastern and northeast Wisconsin. P-types may be mixed for a period through the evening as forecast soundings/time sections show a loss of mid-level moisture. This results in a mix of SN/FZDZ/DZ across E and NE WI. Boundary layer temps near Lake Michigan may also be just above freezing, then fall below freezing after midnight, which could also affect p-types. Current forecast handles this fairly well, bringing what's left of the precip back to all snow by 6AM Sunday, with flurries through the rest of the Sunday.

The rest of the week . Broad zonal flow across Wisconsin will keep temperatures relatively mild with small chances for pcpn here and there. Dry weather is anticipated Monday, then models diverge on if/when small shortwaves provide just enough lift to see some light snow (or rain as daytime temps warm into the lower to middle 30s). Used a general model blend for the forecast, which features small chance PoPs Wednesday through Friday, but confidence on exact timing is low this far out.

The main story of the week will likely be the mild temperatures, with highs in the low to middle 30s, and lows in the 20s. These are anywhere from 10 to 20 degrees above normal for late January. It may be possible to see a few slick spots develop during the nights if enough melting occurs during the day, then refreezes at night.

AVIATION. for 00Z TAF Issuance Issued at 517 PM CST Fri Jan 24 2020

Poor flying conditions will continue across the area through much of Saturday as a slow moving low pressure system tracks across the Great Lakes. Look for IFR and possibly LIFR CIGs and IFR VSBYs with periods of light snow, drizzle, fog and mist. Only minor improvements to flying conditions are expected late Saturday morning into the afternoon. Perhaps the most notable improvement will be the visibilities.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Bersch LONG TERM . KLJ AVIATION . Cooley

---

Weather Reporting Stations

   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
MN4 - 9087088 - Menominee, MI	31 mi	54 min		32°F	35°F		1011.1 hPa	32°F
KWNW3 - 9087069- Kewaunee, WI	32 mi	54 min		34°F			1009.7 hPa

Wind History for Menominee, MI

(wind in knots)    EDIT      (on/off)   Help

Last 24hr

1 day ago

2 days ago

---

Airport Reports

    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.

Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Green Bay, Austin Straubel International Airport, WI	21 mi	31 min	NNE 11	2.00 mi	Light Snow Fog/Mist	33°F	30°F	92%	1011.2 hPa

Link to 5 minute data for KGRB

Wind History from GRB (wind in knots)

9 PM

10 PM

11 PM

12 AM

1 AM

2 AM

3 AM

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

Last 24hr

E5

NE6

E6

E7

E6

E6

E6

NE6

NE6

NE8

NE8

NE9

NE12

NE13

NE11

NE9

NE9

NE10

NE10

NE9

N9

NE9

N9

NE11

1 day ago

SW4

S6

S3

S3

S4

S5

S5

S5

SE4

SE4

SE4

SE4

SE4

SE4

Calm

Calm

NE4

NE7

NE9

NE10

NE8

NE6

NE6

NE5

2 days ago

SW17 G26

SW13 G19

S15 G24

SW14 G23

S13 G21

S10

S14 G22

S13 G21

SW13 G22

SW17 G27

SW14 G23

S15 G23

SW15 G25

S13

SW13 G20

SW13 G22

SW9 G18

S9 G19

S11 G16

S10

SW11 G18

S7

S6

SW7 G19

---

Tide / Current Tables for

   EDIT   Weekend mode (on/off)   (on/off)   Help

---

Tide / Current Tables for

   EDIT      (on/off)   Help

---

Weather Map

       (on/off)   Help Weather Map

---

GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

---

Wind Forecast for Green Bay, WI (21,6,7,8)

      (on/off)   Help

---

Ground Weather Radar Station Green Bay, WI

   (on/off)   Help

---

Cookie Policy: This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser. Privacy Policy: I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway. Disclaimer: The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.