Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.
|Sunrise 7:29AM||Sunset 8:31PM||Thursday April 2, 2020 10:08 PM EDT (02:08 UTC)||Moonrise 12:34PM||Moonset 3:54AM||Illumination 75%|
7 Day Forecast for Marine Location Near Grand Marais city, MNHourly EDIT Help
Area Discussion for - Duluth, MN  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KDLH 030128 AFDDLH
Area Forecast Discussion National Weather Service Duluth MN 828 PM CDT Thu Apr 2 2020
UPDATE. Issued at 828 PM CDT Thu Apr 2 2020
Spotty light rain has been the primary precipitation type this evening ahead of the cold front. At 01Z, the front had just passed through Brainerd and the temp dropped from 57 to 46 degrees in 30 minutes, with light rain reported. The front extends north to just west of International Falls. Main precipitation event is still over western Minnesota. Have made some adjustments to timing of the mixed precipitation, as well as other minor changes. Headlines remain unchanged.
SHORT TERM. (This evening through Friday night) Issued at 355 PM CDT Thu Apr 2 2020
Main forecast concern for the short term remains focused on precipitation chances and type as a slow-moving system passes over the Northland.
A high-amplitude mid-level ridge stretched from far northern Ontario to Illinois this afternoon with a trough farther west over the Dakotas and southern Canadian Prairies. A surface trough axis was along a line from the Manitoba/Ontario border south into eastern Kansas. A sharp nearly-stationary front was located along the surface trough. Temperatures to the west of the boundary were in the 20s and teens and at 18Z Bismarck, ND was at 16 degrees, Rugby, ND was 12 degrees, and Rolla, ND was 10 degrees. Teens and 20s were found in the Red River Valley and temperatures east of the front were in the 40s and 50s over our western zones south toward central Minnesota. Winds over eastern North Dakota were from the north to northwest 15 to 20 mph with gusts to 30 mph, and farther east winds were generally from the south or southeast at 10 to 15 mph with a few gusts to near 20 degrees. Snow, sleet, and freezing rain were reported west of the front with dry conditions farther east.
The surface trough and associated quasi-stationary front will slowly plod eastward tonight and Friday as a shortwave trough aloft lifts north-northeastward through the eastern branch of the trough. The frontal surface will be shallow and bent back toward the cold sector. Warm air advection will continue aloft as the surface front slides east, with sub-freezing temperatures undercutting the warm air aloft. Elevated CAPE of 50 to 150 J/kg is forecast to leak northward from western Minnesota into central and north-central Minnesota between 03 and 09Z tonight. Embedded thunderstorms within the frontogenetically forced precip is possible. Precipitation falling through the warm layer will melt to freezing rain in the wake of the frontal passage. Pavement temperatures are forecast to remain above freezing generally south of US Highway 2 in Minnesota while areas farther north may see ice accumulation on roads. Ice accumulation on bridges, power lines, and trees is likely during the early morning hours with a change to all snow thereafter. The front will continue to slide eastward during the day ushering in a similar transition from rain to freezing rain to snow. After by mid-morning, the risk of icing on roads will end due to the high sun angle, even with clouds overhead. Icing on trees, power lines, and bridges will continue to be possible.
Precipitation will gradually end from west to east Friday afternoon through Friday night as the shortwave lifts into Ontario. Cold air advection will continue over the Northland with overnight low temperatures Friday night in the single figures west to the low 20s east.
LONG TERM. (Saturday through Thursday) Issued at 355 PM CDT Thu Apr 2 2020
This weekend will start out quiet and relatively cool with high pressure moving in. Highs on Saturday will range from the low 40s north to upper 40s south. As high pressure moves east on Sunday, southerly return flow will bring warmer temperatures into the region with highs in the 50s for most areas.
Rain chances increase on Monday as warm air advection and an upper level wave move through. A brief break in precipitation is possible Monday before another wave passes through from west to east. Enough instability may be present to produce a few thunderstorms, with the best potential in east-central Minnesota into northwest Wisconsin with plenty of warm air in place. Highs will likely reach the 60s for southern portions of the region, especially northwest Wisconsin.
Tuesday night into Wednesday, long-range models suggest a cold front will swing through as an upper level trough passes through southern Canada. This will bring drier conditions for most areas, but a few wrap-around showers of rain or perhaps snow will be possible especially in the Arrowhead. Models begin to diverge on Thursday, with the GFS suggesting dry conditions while the Euro hints at a more potent upper level trough with rain chances. In general, the trend will be for slightly cooler temperatures in the upper 40s.
AVIATION. (For the 00Z TAFS through 00Z Friday evening) Issued at 632 PM CDT Thu Apr 2 2020
VFR conditions initially, but look for cigs to drop into the MVFR range fairly quickly this evening as the light rain begins to develop/spread across the terminals. Some BR is expected with the rain, with cigs dropping into the IFR range, with isold pockets of LIFR. Cold air will be working over the terminals late tonight through Friday and a wintry mix of precipitation types is expected, with sleet and freezing rain possible, and eventually changing to snow toward morning. As the cold front moves through the area, all of the precipitation will become snow, with gusty surface winds. A brief period of LLWS may occur at HIB late tonight. Look for cigs to gradually improve to VFR by the end of the forecast with the snow ending.
MARINE. Issued at 355 PM CDT Thu Apr 2 2020
Gusty east to northeasterly winds around the head of Lake Superior will persist through Friday morning before a cold front moves through and turns winds northwesterly. Small craft advisories around the head of Lake Superior and up the North Shore will continue through Friday morning. Winds will gust from 25 to 30 kt with waves 3-6 ft, occasionally as high as 8 ft. Extended a small craft advisory from Port Wing to Sand Harbor through 09Z tonight for waves of 2 to 5 feet. Generally expecting winds to become a bit lighter Friday night into Saturday as high pressure moves in, though they may still be a bit gusty at times Friday afternoon.
PRELIMINARY POINT TEMPS/POPS. DLH 35 36 16 41 / 90 100 20 0 INL 30 30 10 40 / 100 100 10 0 BRD 27 30 15 43 / 100 70 0 0 HYR 44 48 20 48 / 60 100 50 10 ASX 38 51 22 44 / 60 100 70 10
DLH WATCHES/WARNINGS/ADVISORIES. WI . None. MN . Winter Weather Advisory from midnight tonight to 4 PM CDT Friday for MNZ010-018-025-026-033-034.
Winter Weather Advisory from 5 AM to 4 PM CDT Friday for MNZ035- 036.
LS . Small Craft Advisory until 4 AM CDT Friday for LSZ146.
Small Craft Advisory until 10 AM CDT Friday for LSZ141>145.
UPDATE . GSF SHORT TERM . Huyck LONG TERM . JDS AVIATION . GSF MARINE . JDS
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|
|KGNA||26 mi||73 min||NE 8||42°F||1019.2 hPa||26°F|
|GD5 - 9099090 - Grand Marais, MN||26 mi||51 min||1018.3 hPa|
|ROAM4 - Rock of Ages, MI||30 mi||69 min||E 15 G 16||42°F||1021.4 hPa (-0.4)|
|DISW3 - Devils Island, WI||71 mi||69 min||E 18 G 19||39°F||1017.2 hPa (+0.0)||33°F|
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Grand Marais/Cook County Airport, MN||27 mi||34 min||ENE 10||10.00 mi||Mostly Cloudy||39°F||15°F||39%||1017.9 hPa|
Link to 5 minute data for KCKC
Wind History from CKC (wind in knots)
|1 day ago||Calm||NE||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NE||NE||E||E||E||SE||E||SE||E||E||E||E||E||Calm||NE|
|2 days ago||Calm||N||N||N||N||NE||N||N||N||N||Calm||N||N||E||E||SE||E||SE|
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GEOS Local Image of GreatLakes 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 Duluth, MN (22,6,7,8)(on/off)  Help
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