South Glastonbury, MT Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for South Glastonbury, MT

April 23, 2024 1:49 AM MDT (07:49 UTC) Change Location
Sunrise 6:21 AM   Sunset 8:23 PM
Moonrise 7:29 PM   Moonset 5:09 AM 
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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.

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7 Day Forecast for Marine Location Near South Glastonbury, MT
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Area Discussion for - Billings, MT
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FXUS65 KBYZ 221939 AFDBYZ

Area Forecast Discussion National Weather Service Billings MT 139 PM MDT Mon Apr 22 2024

DISCUSSION
Through Tuesday night...

Satellite imagery shows an upper low over southern SK moving into mb and a dry NW flow over our region...though there is some moisture wrapping southward thru northeast MT and northwest ND on the back side of the low. This moisture and reasonably steep mid level lapse rates may bring a few light showers/sprinkles to Fallon County mainly this evening. Surface W-NW winds gusting 30-50 mph will continue thru most of the afternoon then diminish as we get close to and beyond sunset. Highest gust we have seen so far is 52 mph in northeast Rosebud County (Rock Springs DOT).
Dew points have fallen to the mid-upper teens most locations, and if high res models are correct (upstream obs suggest they are) we will see dew points closer to the lower teens by late afternoon, before we begin to see moistening from northeast MT. So expect RHs to fall into the teens before they begin to recover, with temps in the 50s to lower 60s. All told, forecast is in good shape for the remainder of today.

Weak shortwave in northern ID will slide to the southeast over the next 18-24 hours. Air mass in place is obviously quite dry, but models show a bit of moistening in the 650-550mb layer which, along with synoptic scale ascent, could produce a few snow showers over our southern mountains tonight through Tuesday morning. By tomorrow, rising heights should prevent any shower activity at lower elevations during the peak heating hours. Tuesday night will be dry underneath upper level ridge.

Temperatures over the next 36 hours will be seasonable. Look for lows tonight in the upper 20s to mid 30s, highs Tuesday in the upper 50s and lower 60s, and lows Tuesday night mostly 30s.

More active weather emerges in the extended period. Keep reading for more on that.

JKL

Wednesday through Monday...

An active weather pattern is shaping up for the second half of this week into the weekend. Be sure to monitor the forecast over the coming days.

Weak shortwave ridging over the region on Wednesday will promote warm and dry conditions with highs into the 70s and afternoon RH down into the teens, but with generally light winds. Southwest flow begins to set up over western areas by Wednesday evening as large scale troughing moves into the western US, and the ridge axis shifts east into the Dakotas. An active weather pattern sets up over the region starting Thursday as large scale troughing deepens over the western US, and moisture and energy begin advecting into the region from the southwest and west. Periods of showers are possible most days, along with cooler temperatures. At this time, the best precipitation potential is over the mountains and western areas, with organized forcing (upper lows) staying south and east of the area. Precipitation chances are forecast to range from 15-40% over eastern areas, to 50-90% over western areas and mountains most days. A few weak thunderstorms are possible on Thursday with marginal instability in place. Precipitation is expected to be rain across the lower elevations, with snow in the mountains, generally above 7,000-8,000 feet. Latest probabilities of 0.25 inches or more of liquid precipitation (rain/melted snow)
from Thursday into Sunday ranges from 30% over eastern areas, to 70-100% from Billings to Sheridan and areas south and west.

High temperatures are forecast to range from the 60s to lower 70s on Thursday, to the 50s and 60s Friday through Sunday. A slight warmup on Monday looks to nudge temperatures back into the 60s to lower 70s. STP

AVIATION

W-NW winds gusting 25-40 knots (highest east) will diminish this evening, and winds will remain much lighter late tonight through Tuesday. A weak shortwave may produce a few light snow showers or flurries over the Beartooth/Absaroka and Bighorn Mountains from this evening into tomorrow, possibly obscuring the high terrain at times. Otherwise, VFR will prevail through Tuesday as upper level ridge builds back over the region. JKL

PRELIMINARY POINT TEMP/POPS

Tue Wed Thu Fri Sat Sun Mon ----------------------------------------------------------- BIL 034/061 038/074 047/069 048/060 045/056 041/063 042/069 00/U 00/U 14/R 56/R 57/R 34/R 23/R LVM 027/059 035/071 044/064 043/052 038/051 036/059 038/063 00/B 00/U 26/T 68/R 78/R 35/R 24/T HDN 031/063 035/076 044/072 047/064 044/061 039/065 040/072 00/U 00/U 12/R 45/R 46/R 44/R 23/R MLS 034/060 038/074 046/073 046/066 043/060 042/061 041/071 00/U 00/U 01/B 22/R 24/R 33/R 11/B 4BQ 034/060 037/074 047/073 048/066 042/059 041/060 040/070 00/U 00/U 01/B 33/R 24/R 33/R 11/U BHK 031/059 035/071 042/072 043/064 037/058 038/057 037/067 10/U 00/B 03/T 22/R 13/R 33/R 21/U SHR 030/061 033/072 042/068 044/059 039/055 036/059 036/068 00/B 00/U 04/R 66/R 57/R 55/R 22/R

BYZ WATCHES/WARNINGS/ADVISORIES
MT...None.
WY...None.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KBZN37 sm53 minSSE 0810 smClear28°F18°F64%30.06
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Wind History from BZN
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Tide / Current for
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Weather Map
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GEOS Local Image of northern rockey   
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Billings, MT,



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