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 6:07AM||Sunset 8:32PM||Saturday August 8, 2020 6:29 AM CDT (11:29 UTC)||Moonrise 10:09PM||Moonset 10:03AM||Illumination 80%|
7 Day Forecast for Marine Location Near Shorewood, MNHourly EDIT Help
Area Discussion for - Twin Cities, MN  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KMPX 080800 AFDMPX
Area Forecast Discussion National Weather Service Twin Cities/Chanhassen MN 300 AM CDT Sat Aug 8 2020
SHORT TERM. (Today through Sunday Night) Issued at 300 AM CDT Sat Aug 8 2020
A potentially active weekend in terms of weather is on the horizon. The chance for strong storms exists right out of the gate this morning, as storms over northeast MN and northern WI shift into the west central WI portion of the forecast area. This activity could flare a bit after sunrise this morning as daytime heating ensues. The primary threat would be damaging winds. Given modest lapse rates around 7 C/km, large hail can't be ruled out, but is a slightly lesser threat.
By mid to late morning we should see a break in any thunderstorm activity as we await the next round. Heat and humidity will build in the warm sector ahead of the front. Have increased temperatures into the mid to upper 80s across most of the area (slightly "cooler" in WI with low to mid 80s). Dewpoints will be pushing 75 degrees, which will mean heat indices will flirt with mid 90s. Given my forecast temps and dewpoints are near the higher end of numerical guidance, and considering the potential for clouds/convection to hinder heating a tad, will not issue a Heat Advisory, but highlight the threat in the HWO/graphical products. It will certainly be an uncomfortable afternoon for anyone active outside given the relatively light winds combined with the heat & humidity, as illustrated by WBGT (Wet Bulb Globe Temperature) values nearing 85 degrees this afternoon.
The August-like humidity will also be revealed in progged MLCAPEs circa 4000 J/kg from southwest into central Minnesota this afternoon. H7-H5 lapse rates are also forecast to be around 8.5-9 C/km. Therefore, if we can get any convection to pop, strong to severe storms will be a decent possibility. The one big limiting factor will be warm H7 temps of +13C to +14C. Therefore, any afternoon activity would likely be isolated in nature, so a 20 POP seems sufficient for now.
Tonight we expect to see a mid-level shortwave pass across the area, which will act to override any capping aloft and bring more widespread activity. Given the stalled boundary bisecting the area, precipitable water values around 2 inches, and forcing supplied by the shortwave, heavy rainfall is expected. Exactly where that sets up is still of low confidence, but as of now west central MN looks to have the greatest risk on the cool side of the boundary. Given antecedent soil conditions, thirsty crops, etc., think this area can withstand a fairly heavy bout of rainfall before we see much in the way of impacts, so will hold off on any flash flood headlines at this point.
Showers and thunderstorms spread east across the area on Sunday attendant with the frontal passage. Steep lapse rates and low- level shear look sufficient to bring a threat for damaging winds. Sunday night differential divergence associated with the entrance region of the upper level jet streak over northwest Ontario supplies renewed forcing for showers and thunderstorms through Sunday night.
LONG TERM. (Monday through Friday) Issued at 300 AM CDT Sat Aug 8 2020
The long term period will start off cooler and drier before transitioning to a more typical August pattern.
At the start of the period the cold front will have exited the CWA to the southeast and surface high pressure will move in behind it. High temperatures on Monday will be in the upper 70s with a few 80s possible. Drier air behind the cold front will drop the dewpoints back into the comfortable 50s where they will remain through Tuesday. Tuesday will be a few degrees warmer than Monday, but with relatively lower dewpoints should still feel reasonably comfortable.
On Wednesday high pressure moves off to the east and warmer, more humid air starts to return to the area. Highs temperatures through the rest of the period will be seasonable in the low to mid 80s, and overnight lows mainly in the 60s. The weather should also become more active with shortwave energy bringing periodic chances for showers and thunderstorms through the rest of the long term. There is not much timing on the details of when and where any precipitation will occur, so will stick with the low PoPs from Wednesday on that were given by the NBM.
AVIATION. (For the 06Z TAFS through 06Z Saturday night) Issued at 1222 AM CDT Sat Aug 8 2020
Little to no precipitation has developed south of the thunderstorm complex across north-central Minnesota, so the threat for thunder tonight looks low at area terminals. Scattered rain showers still may develop overnight through tomorrow morning with an isolated lightning strike possible with the strongest cells, but overall impacts look minor. Ceilings will drop to MVFR overnight and likely remain there through the morning, with improvement to VFR expected during the afternoon. ANother round of thunderstorms is possible towards the end of the period, especially across western Minnesota, but confidence remains low in the timing at this point.
KMSP . A few rain showers are possible towards sunrise, with perhaps an isolated rumble of thunder with the strongest cells. MVFR ceilings look likely by 09-10Z with improvement not expected until at least early afternoon. There is an outside shot at ceilings approaching IFR early this morning, but the lowest ceilings will likely remain down in the river valleys.
/OUTLOOK FOR KMSP/ Sun . VFR. Chc MVFR/-TSRA. Wind S 10-15 kts. Mon . VFR. Wind NW 5-10 kts.
MPX WATCHES/WARNINGS/ADVISORIES. MN . None. WI . None.
SHORT TERM . LS LONG TERM . CEO AVIATION . ETA
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Minneapolis - Flying Cloud Airport, MN||8 mi||36 min||S 8||10.00 mi||Mostly Cloudy||74°F||69°F||85%||1011.8 hPa|
|Minneapolis, Crystal Airport, MN||13 mi||36 min||S 7||10.00 mi||Mostly Cloudy||75°F||69°F||82%||1011.3 hPa|
|Minneapolis, Minneapolis-St. Paul International Airport, MN||18 mi||36 min||S 8||10.00 mi||Mostly Cloudy||74°F||70°F||88%||1012.2 hPa|
|South St. Paul Municipal-Richard E. Flemi, MN||22 mi||34 min||S 5||10.00 mi||Partly Cloudy||74°F||68°F||84%||1012.9 hPa|
|Buffalo, Buffalo Municipal Airport, MN||22 mi||34 min||no data||10.00 mi||Overcast||73°F||68°F||86%||1012.5 hPa|
|Minneapolis / Blaine, MN||23 mi||34 min||S 5||10.00 mi||Mostly Cloudy||75°F||69°F||83%||1012.5 hPa|
Link to 5 minute data for KFCM
Wind History from FCM (wind in knots)
|1 day ago||SE||SE||SE||SE||S||SE|
|2 days ago||Calm||S||SW||S||S||SW||W||S||S|
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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.
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Wind Forecast for Twin Cities, MN (7,2,3,4)(on/off)  Help
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