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Marine Weather and Tides
Version 3.4 |
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 6:15AM | Sunset 8:07PM | Friday August 23, 2019 5:46 PM CDT (22:46 UTC) | Moonrise 10:59PM | Moonset 1:18PM | Illumination 41% |  |
LSZ146 Expires:201908201330;;930312 Fzus73 Kdlh 201308 Mwsdlh Marine Weather Statement National Weather Service Duluth Mn 808 Am Cdt Tue Aug 20 2019 Lsz144>146-162-201330- 808 Am Cdt Tue Aug 20 2019
.a strong Thunderstorm over western lake superior... The areas affected include... Duluth mn to port wing wi... Lake superior west of a line from saxon harbor wi to grand portage mn beyond 5nm... Port wing to sand island wi... Two harbors to duluth mn... At 807 am cdt, doppler radar indicated a strong Thunderstorm, capable of producing winds to around 30 knots, small hail, and frequent cloud to water lightning. This strong Thunderstorm was located near french river, or 12 nm east of duluth lift bridge channel, moving east at 40 knots towards port wing. Locations impacted include... Brule point, herbster, and bayfield peninsula sea caves. Precautionary/preparedness actions... Mariners can expect wind gusts up to 33 knots...locally higher waves...cloud to water lightning strikes...small hail...and heavy downpours. Boaters should seek safe harbor until these storms pass. && lat...lon 4678 9191 4693 9187 4692 9095 4684 9110 4682 9118 4683 9121 4674 9150 4671 9163
.a strong Thunderstorm over western lake superior... The areas affected include... Duluth mn to port wing wi... Lake superior west of a line from saxon harbor wi to grand portage mn beyond 5nm... Port wing to sand island wi... Two harbors to duluth mn... At 807 am cdt, doppler radar indicated a strong Thunderstorm, capable of producing winds to around 30 knots, small hail, and frequent cloud to water lightning. This strong Thunderstorm was located near french river, or 12 nm east of duluth lift bridge channel, moving east at 40 knots towards port wing. Locations impacted include... Brule point, herbster, and bayfield peninsula sea caves. Precautionary/preparedness actions... Mariners can expect wind gusts up to 33 knots...locally higher waves...cloud to water lightning strikes...small hail...and heavy downpours. Boaters should seek safe harbor until these storms pass. && lat...lon 4678 9191 4693 9187 4692 9095 4684 9110 4682 9118 4683 9121 4674 9150 4671 9163
LSZ146
7 Day Forecast for Marine Location Near Cornucopia, WI
Hourly EDIT Helplocation: 46.9, -91.04 debug
Area Discussion for - Duluth, MN
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kdlh 232036 afddlh area forecast discussion national weather service duluth mn 336 pm cdt Fri aug 23 2019 Short term (this evening through Saturday night) issued at 336 pm cdt Fri aug 23 2019 upper level ridging and surface high pressure over the northland this afternoon will slowly move eastward on Saturday. Look for clear mainly clear skies tonight and a gradual increase in cloud cover for Saturday. No precipitation is expected. Lows tonight will be in the middle 30s along the higher terrain of the north shore and penokee hills in northwest wisconsin. Highs on Saturday will reach the upper 60s near grand marais to the upper 70s in north-central minnesota with low and middle 70s elsewhere. Cloud cover will gradually increase Saturday night in response to an approaching upper-level trough and surface cold front. Storms may fire over the dakotas and southern canadian prairies Saturday afternoon with cirrus spreading into our area. There is a slight chance of a shower moving into north-central minnesota before 12z Sunday. Lows Saturday night won’t be as cool with readings in the upper 40s to upper 50s. Long term (Sunday through Friday) issued at 336 pm cdt Fri aug 23 2019 wet fall like pattern through much of the extended. There will be chances of showers on most days with thunderstorms possible on Sunday, Monday and Tuesday afternoon. Cooling trend expected for temperatures. Shower and thunderstorm chances will increase from west to east Sunday and Sunday night. This is a result of a shortwave embedded within a larger trough lifting from the northern plains into the upper mississippi river valley. There will be strong southerly warm air advection, which will bring mild temperatures. There will be broad ascent as the 250 hpa jet digs into the northern plains from the pacific northwest. The strong ascent coupled with to mild temperatures could bring some thunderstorms on Sunday. An isolated severe storm or two isn't out of the question at deep layer shear approaches 20-30 knots late on Sunday across north central minnesota. This matches up with spcs current day 3 outlook well. Expect the mildest temperatures in the extended on Sunday with highs ranging from the mid 60s to the mid 70s. The jet will continue digging into the northern plains on upper midwest on Monday. This will become negatively tilted over the region. At the surface low pressure will develop somewhere in southern manitoba or western ontario. Anticipate widespread rain ahead of the cold front associated with the low. There is an opportunity where strong to severe storms will be possible. Warm, moist air will continue to advect in due to southwesterly flow and deep layer shear will be sufficient for severe storms. The question at this point in time is the instability. Models show 500-1500 j kg of cape, but am a be skeptical of these values given the amount of cloud cover expected. Will need to see how things evolve as we get closer to Monday, but will be worth watching. At this point in time looks like there will be a good chance for heavy rain with totals of 1-1.5 inches from Sunday through Monday. Suspect there will be some isolated 2 inch totals where thunderstorms move through. Lowered precipitation totals from the previous forecast as they seemed too high based on yesterdays and todays QPF from deterministic and wpc guidance. The cold front will slide through the northland late on Monday into early Tuesday. The low will cutoff over ontario and rotate north of the region through the rest of the extended. Expect cold northwesterly flow through much of Tuesday and into Wednesday. |
This setup typically brings scattered rain showers and suspect there will be some instability on Tuesday which could bring a few rumbles of thunder. The cutoff will begin lifting northwards toward hudson bay on Wednesday. This will still bring scattered rain showers, but it does not appear there will be sufficient instability at this time for any thunder. Expect generally dry conditions at this point in time on Thursday as the cutoff lifts into hudson bay and high pressure builds into the mid mississippi river valley. Expect the coolest readings on Wednesday and Thursday with highs generally in the 60s. Aviation (for the 18z tafs through 18z Saturday afternoon) issued at 1247 pm cdt Fri aug 23 2019 vfr conditions expected this afternoon and into this evening as high pressure nudges in from lake superior. Diurnally driven cumulus has developed with ceilings between 2.5 to 4kft per observations. Suspect that if any MVFR ceilings develop it will be short lived as the mixed layer grows and ceilings lift. Winds may gust up to 15 knots this afternoon before the mixed layer decouples this evening. Diurnally driven cumulus will dissipate this evening as the sun sets. Skies will generally be clear overnight with light winds. This will result in radiation fog formation as was the case early this morning. Utilized persistence coupled with the latest mos guidance for a handle on timing and potentially the lowest visibilities tonight. Expecting MVFR ifr conditions, but have held off from lifr at this point in time as winds should be slightly higher than last night with the high center further away. This is not to say it isn't out of the question, but not confident enough at this point to hone in on the best chance of lifr. Expect fog to lift between 12z and 14z and conditions become vfr again. There is an outside possibility that MVFR cumulus develops mid to late in the morning before lifting above MVFR limits like today. Marine Issued at 336 pm cdt Fri aug 23 2019 high pressure will remain firmly in place over the central great lakes tonight. The high will slowly slide eastward into the eastern great lakes by late on Saturday. Borderline small craft advisory conditions will be present across the western tip of lake superior early this evening. Northeast winds will diminish as the night progresses. Expect east to northeast winds for much of Saturday with speeds of 5-10 knots. Winds will shift to a southerly direction late on Saturday. Preliminary point temps pops Dlh 49 74 54 75 0 0 0 10 inl 48 78 57 75 0 0 20 60 brd 53 78 58 75 0 0 0 30 hyr 44 75 52 76 0 0 0 10 asx 46 77 54 78 0 0 0 0 Dlh watches warnings advisories Wi... Beach hazards statement until 7 pm cdt this evening for wiz001. Mn... Beach hazards statement until 7 pm cdt this evening for mnz037. Ls... None. Short term... Huyck long term... Wl aviation... Wl marine... Wl |
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 |
| DISW3 - Devils Island, WI | 21 mi | 47 min | E 9.9 G 11 | 64°F | 1025.5 hPa (-0.4) | 50°F | ||
| SXHW3 - Saxon Harbor, WI | 40 mi | 67 min | NE 15 G 18 | 68°F | 1023.7 hPa | |||
| 45028 - Western Lake Superior | 42 mi | 17 min | ENE 16 G 16 | 63°F | 66°F | 3 ft | 1024.1 hPa | 60°F |
Wind History for Duluth, MN
(wind in knots) EDIT (on/off) Help| 5 PM | 6 PM | 7 PM | 8 PM | 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 | |
| Last 24hr | NE G11 | NE G12 | NE G12 | NE G9 | NE G6 | NE | NE G7 | N G5 | N G4 | NE G4 | NE G6 | N | N G5 | N | NE G6 | NE G8 | E G7 | E G7 | NE G8 | NE G9 | NE G13 | NE G12 | NE G15 | NE G13 |
| 1 day ago | W G14 | NW G13 | NW | NW | NW G11 | NE | NW | NW G12 | NW G11 | NW | N G7 | N G7 | NE | N | N | NE | NE | NE G6 | NE G9 | NE G9 | NE G8 | NE G7 | NE G11 | NE G9 |
| 2 days ago | NW G17 | N G10 | NW G14 | N G9 | W | E | N G9 | NW G10 | SW | SW G8 | NW | NW | NW G15 | NW | NW G14 | NW G13 | NW G13 | NW G11 | NW | W G13 | NW G15 | NW G17 | W G13 | W G16 |
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 |
| John F Kennedy Memorial Airport, WI | 25 mi | 54 min | N 10 | 10.00 mi | Fair | 69°F | 52°F | 55% | 1025.3 hPa |
Link to 5 minute data for KASX
Wind History from ASX (wind in knots)
| 6 PM | 7 PM | 8 PM | 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 | |
| Last 24hr | E | NE | Calm | Calm | Calm | SW | Calm | Calm | Calm | N | N | N | N | NE | N | |||||||||
| 1 day ago | NW | NW | N | Calm | N | NW | W | Calm | W | Calm | W | N | N | NE | E | E | NE | N | NE | NE | NE | |||
| 2 days ago | W | NW | N | N | SW | W | W | SW | W | W | NW | NW | W | W G16 | NW G19 |
Tide / Current Tables for
EDIT Weekend mode (on/off) (on/off) HelpTide / Current Tables for
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GOES 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 Duluth, MN (18,4,5,8)
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Ground Weather Radar Station Duluth, MN
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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 numerious 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. |