Marine Weather and Tides
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen
|Sunrise 7:17AM||Sunset 4:14PM||Thursday December 12, 2019 8:22 AM CST (14:22 UTC)||Moonrise 5:50PM||Moonset 8:38AM||Illumination 99%|
7 Day Forecast for Marine Location Near Howard, WIHourly EDIT Help
Area Discussion for - Green Bay, WI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KGRB 121153 AFDGRB
Area Forecast Discussion National Weather Service Green Bay WI 553 AM CST Thu Dec 12 2019
Updated aviation portion for 12Z TAF issuance
SHORT TERM. Today . Tonight . and Friday Issued at 356 AM CST Thu Dec 12 2019
Winter weather headlines will be the main concern today.
Only minor changes to headline timing, with a later start time for the southern tier of counties, including the northern Fox Valley.
Light snow continued to develop over northern WI, in association with the RRQ of an upper level jet and strong WAA. This initial band of snow was lifting northeast, leaving central WI and the Fox Valley dry at this early hour. Bands of snow are expected to continue to form over northern WI early this morning, though lingering dry air in the low-levels may limit the intensity and result in some breaks in the steady snow at times, especially over the far northeast. The snow is expected to become heavier and more widespread from west to east during the morning as low pressure approaches and the low-level jet cranks up to 40 to 45 knots. A potent short-wave over the Dakotas will provide additional forcing as it moves through the region during the afternoon. The heaviest snow is expected from mid-morning through mid-afternoon. Moisture will shallow out during the mid to late afternoon, leading to the potential for freezing drizzle. Do not think the freezing drizzle will be very impactful, as it will be falling on snow covered or treated roads. Snowfall totals will range from 1 to 3 inches south to 5 to 7 inches north. Highs will range from the upper teens northwest to the lower 30s southeast.
Lingering light snow or freezing drizzle will taper off in eastern WI this evening, with mostly cloudy skies persisting through the night. Lows will be in the teens northwest and lower to middle 20s southeast.
Weak low pressure/inverted trough will approach the region Friday afternoon, and bring a small chance of light snow or freezing drizzle, especially across our western counties. Highs will be in the 20s and lower 30s.
LONG TERM. Friday Night Through Wednesday Issued at 356 AM CST Thu Dec 12 2019
The main highlights for this forecast period are the chances for accumulating snow Friday night through Saturday and below normal temperatures for next week.
Friday Night through Saturday . An upper-level shortwave trough will move into the Upper Mississippi Valley Friday night. Questions then arise with the surface low pressure system/cold front. Model guidance is not in agreement with the track of this system or amount of moisture associated with it, and shows some phasing problems. However, there is some agreement with weak forcing during this time, making for light snow accumulations. Do to much uncertainty with this system, did not steer much from model blend.
Rest of the forecast . By Saturday night, the upper-level trough will shift east leaving behind chances for light lake effect snow showers over far north-central Wisconsin. A surface high pressure system will then push into the northern Plains funneling cold Canadian air into the forecast area. Therefore, temperatures beginning Sunday morning through the rest of the extended will remain below normal. A small break in the below normal temperatures may occur on Monday as model guidance shows a low pressure system moving into the Midwest from Oklahoma on Monday. This system could bring some snow to southeastern Wisconsin, however, models are not in agreement with the track of this system. Beyond this system, another area of high pressure will move into the northern Plains bringing more cold Canadian air to the region through midweek.
AVIATION. for 12Z TAF Issuance Issued at 542 AM CST Thu Dec 12 2019
Light snow over the northern and western parts of the forecast area will spread southeast across the rest of the region and become heavier this morning. As this occurs, flight conditions will deteriorate to IFR/LIFR at most locations. The snow will diminish and mix with freezing drizzle from mid-afternoon through early evening. Though visibilities will improve significantly as this occurs, ceilings are likely to remain IFR or lower-end MVFR through the night. Gusty southerly winds are expected to develop along the lakeshore today.
Plowing operations will be needed today, with accumulations ranging from 1 to 3 inches south to 5 to 7 inches north. The heaviest snow is expected to fall from mid-morning through mid- afternoon.
GRB WATCHES/WARNINGS/ADVISORIES. Winter Weather Advisory from 9 AM this morning to 6 PM CST this evening for WIZ037>040.
Winter Weather Advisory until 6 PM CST this evening for WIZ005- 010-018>022-030-031-074.
Winter Weather Advisory until 6 PM CST this evening for WIZ035- 036.
Winter Storm Warning until 6 PM CST this evening for WIZ011>013- 073.
SHORT TERM . Kieckbusch LONG TERM . Hykin AVIATION . Kieckbusch
Weather Reporting StationsEDIT (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|
|KWNW3 - 9087069- Kewaunee, WI||33 mi||53 min||E 5.1 G 12||28°F||1025.1 hPa|
|MN4 - 9087088 - Menominee, MI||46 mi||53 min||N 11 G 13||15°F||35°F||1026.7 hPa||13°F|
Wind History for Kewaunee MET, WI(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Green Bay, Austin Straubel International Airport, WI||6 mi||30 min||ENE 7||10.00 mi||Mostly Cloudy||17°F||8°F||68%||1026.6 hPa|
Link to 5 minute data for KGRB
Wind History from GRB (wind in knots)
|1 day ago||W||W||W||W||W||W||W||W||W||W||W||W||W||W||SW||SW||SW||SW||W|
|2 days ago||NE||N||N||N||NE||N||NE||NW||NW||N||N|
EDIT Weekend mode (on/off) (on/off)  Help
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 (9,2,3,4)(on/off)  Help
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