Thursday, September23, 2021
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Marine Weather and Tides
Portland, ND

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:15AMSunset 7:25PM Thursday September 23, 2021 10:25 PM CDT (03:25 UTC) Moonrise 7:47PMMoonset 8:59AM Illumination 92% Phase: Waning Gibbous; Moon at 17 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Portland, ND
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location: 47.5, -97.37     debug


Area Discussion for - Grand Forks, ND
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FXUS63 KFGF 240250 AFDFGF

Area Forecast Discussion National Weather Service Grand Forks ND 950 PM CDT Thu Sep 23 2021

UPDATE. Issued at 950 PM CDT Thu Sep 23 2021

Cold front is still actively passing over our CWA (currently south of GFK but just north of KFAR). There are light elevated returns on radar, but no precip has been reported (most likely virga). A few drops here an there can't be ruled out with this activity. Forecast is on track with low probabilities for sprinkles or very light showers, and only minor adjustments to near term trends were necessary.

UPDATE Issued at 642 PM CDT Thu Sep 23 2021

The cold front is actively moving over the northern RRV with shifting winds and variable mid-high cloud cover. Temperatures remain warm in the 70s across much of the CWA, and despite the cold front may be slower to drop after sunset as the main area of CAA is offset and winds may remain high enough to limit nocturnal inversion. There is still a weak signal for later tonight for sprinkles or very light (barely measurable) precipitation. A significantly dry layer (Td depressions 20-25F) is shown to remain in place in the lowest 10kft agl of the atmosphere, so despite good forcing and a little instability virga/sprinkles are still ultimately more likely than measurable. Some CAM members of HREF and latest NBM do support low probabilities for light amounts (less than 0.1"), but this is going to be hard to come by. I kept isolated mention in place as this still matches current trends.

SHORT TERM. (This evening through Friday night) Issued at 231 PM CDT Thu Sep 23 2021

Temperatures and chance of a few light rain showers will be the main challenges for the period.

Very quiet so far today with the region under slight ridging between the upper low over MI and the trough digging through southern Canada. The trough to our northwest will move into the Dakotas/MN tonight, and should help push the cold front that is currently just entering the northwestern counties the rest of the way through the CWA. A few mid and high clouds thanks to some mid level moisture along and behind the front, and can't completely rule out a few light rain showers later tonight as the boundary pushes through. Kept the low POPs we had going, with minimal QPF reaching the ground. The cold front will help knock temps near the Canadian border to around 40, with low 50s further south where the front comes through later and clouds hang on a bit longer.

Surface high pressure builds in behind the front on Friday as the upper trough amplifies to our east. A few weak vorts on the back side of the trough could bring a few showers to the Lake of the Wood region Friday evening, but again amounts and impacts will be minimal. Temps will stay in the 60s for Friday, with breezy northwest winds at 15 to 25 mph. The surface high will move south Friday night, allowing westerly winds to pick up a bit and some weak warm air advection. However, clear skies and low dew points will create some great radiational cooling before the advection kicks in, and there will be some locations dropping into the upper 30s early Saturday morning.

LONG TERM. (Saturday through Thursday) Issued at 231 PM CDT Thu Sep 23 2021

Impactful weather chances shouldn't present themselves at any point during the extended forecast time period. Just fall steam ahead !

A ridge of high pressure will build over the central United States starting Sat and will last through the majority of next week. Several things can be gleaned from the various ensemble data, principally a dearth of precipitation over the next 7 days, and anomalously high temperatures during the same period. Temps will start within a few degrees of 70 on Sat, then bump up into the 70s on Sun and over 80 early to mid next week. A weak "cool" front appears to be the only surface feature present, and it should merely be a wind shift line moving through sometime Sun afternoon. The only precipitation chance for this time frame may come at the very end of our forecast, around Wed when the ridge starts breaking down.

AVIATION. (For the 00Z TAFS through 00Z Friday evening) Issued at 642 PM CDT Thu Sep 23 2021

VFR conditions should prevail through the TAF period across eastern ND and northwest MN. WInds are shifting from the south to the northwest as a cold front moves through the region this evening. Gusty west-northwest winds are expected during the daytime period Friday. A period of virga or isolated very light showers is possible late tonight into Friday morning, with impacts/coverage uncertain at TAF sites.

FGF WATCHES/WARNINGS/ADVISORIES. ND . None. MN . None.

UPDATE . DJR SHORT TERM . JR LONG TERM . WJB AVIATION . DJR


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Grand Forks, Grand Forks International Airport, ND33 mi33 minNNW 710.00 miMostly Cloudy56°F46°F70%1011.6 hPa

Link to 5 minute data for KGFK

Wind History from GFK (wind in knots)
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Last 24hrS11S11S11S10S10S12S12S14S12S11S13S18
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1 day agoS6S6S8S8SW7SW7SW5S5S4S7S8S9S8S10S14
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2 days agoN18NW7NW8NW8NW7NW6W6W6W6W6W6NW8NW43W5
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NW11NW6N6W4W63E3SE6S4

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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