Aikyam-Lab/Synoptic-Bench huggingface dataset:
Otherwise, fog continues to be a problem in the Lower Treasure Valley and in portions of Baker County. Generally VFR with pockets of low clouds and fog with mountains being obscured bringing MVFR/IFR conditions near KBKE, KMYL, along with the lower portions of the lower Treasure Valley including KONO and KEUL.
Northwest flow aloft with trof axis dropping south through the Ohio Valley early this evening. Clouds have thickened and lowered behind this trof. A few flurries are possible thru the remainder of the aftn into the very early evening as this trof drops south of the Ohio River. Mid level ridge to build to our west into the Mid MS Vly with continued northwest flow over Ohio. Mid level ridge to shift a little east Tuesday night. Expect continued low level clouds with high level clouds spilling in ahead of a low in the lower MS VLY.
1230 PM EST Mon Jan 27 2020 Occasional light snow and flurries, possibly mixed with some patchy freezing drizzle is possible into early this morning.
1112 AM EST Mon Jan 27 2020 High pressure is building down from the north, but a few more days of weather similar to today are expected.
An upper low will provide lift with wide spread shwrs and isold TS Tues/Wed. However, the clouds should break enough this afternoon for temperatures to still warm into the lower to mid 60s.
Readings have ranged from around freezing in the areas shrouded with low clouds to the lower 50s under ample sunshine in southern sections of southeast MO and western KY.
254 PM CST Mon Jan 27 2020 High pressure will be over eastern North Dakota this evening and over northwestern Minnesota overnight. Next 500 mb short wave trough over Montana will move east and a band of light snow mainly due to 850 mb warm advection will move into W ND tonight and into central ND Tues morning/midday. By Thu night, the approach of a warm front will introduce more moisture which, combined with some synoptic forcing, could mean some light snow at times Fri with better chances Fri eve into the first part of Sat.
942 AM PST Mon Jan 27 2020 High pressure aloft and weak offshore flow will create warmer and dry weather to start the week.
1048 AM CST Mon Jan 27 2020 Early morning satellite imagery shows a compact closed low progressing southeast through Iowa, which prompted freezing drizzle and flurries across a portion of the region overnight. The latest surface observations and webcam images show that freezing drizzle and dense fog have developed across much of southwest MN with flurries and freezing drizzle across portions of southeast SD. in mainly northwest flow aloft, ahead of strong ridging off the west coast. On Tuesday and Tuesday night, a north-south oriented trough passing through the Northern and Central Plains is expected to develop light precipitation in the region.
Precip chances will increase by the weekend as an energetic north Pacific jet propagates into North America and an amplifying Alberta-clipper-like trough digs into the Great Lakes. There is a slight chance for some freezing drizzle and light icing between 06Z and 12Z.
The clearing along and south of the Ohio River held pretty strong today, and stratus over southern IN has stopped it's progress southward due to mixing and a warmer/drier airmass immediately to the south. The progress of the stratus deck will have an influence on the overnight lows and likely the highs on Tuesday. Overall, expecting lows tonight at or just below freezing with highs tomorrow struggling under the clouds that have finally built in.
1028 AM EST Mon Jan 27 2020 A weak low pressure across east Gulf of Mexico today will move southeast today and dissipate as it reaches the peninsula and it gets absorbs by a trough moving east.
A stellar afternoon underway across the Mid-South with mostly sunny and mild temperatures as weak high pressure builds into the region.
424 PM MST Mon Jan 27 2020 Current surface map places warm front over eastern Montana into eastern Wyoming. Snow associated with upper trof is spreading into northeast Wyoming.
Building high pressure will return dry weather and seasonable temperature by mid week. Limited upslope flow should still result in some potential for freezing drizzle N of PIT and in the ridges tonight as moisture becomes marginal for ice in the dendritic growth zone, though this appears minimal as mixing continues and cig heights rise above 1000ft. Such shallow moisture evident in forecast soundings may support the development of areas of drizzle / freezing drizzle again Tuesday but have opted to allow later shifts to refine precipitation type with updated guidance.
Low pressure system tracking through the area this afternoon has brought fairly widespread snow across Carbon County. WYDOT webcams showing poor visibility at Halleck Ridge and Wagonhound. Ridge axis builds into the area late Tuesday morning into the afternoon for a fairly nice day with sunny skies east of the Laramie Range and variable clouds west.
With the development of an upper level low to our west, and track across the southern plains, this will put southwestern Kansas in a preferred location for winter precipitation. In fact, temperatures will be just above freezing at the onset of precip at some level between the surface and 4000 ft. There is evidence that snow rates will be high at times due to steep lapse rates above the low level frontal inversion.
A cold front will move through the state Tuesday night, with scattered light snow showers expected.
A weak upper wave will move over WI tonight increasing the threat for patchy freezing drizzle in west- central WI. An upper level ridge will build in and result in light and variable winds. The GFS and NBM are optimistic and want to break up the cloud cover Tuesday afternoon, but in reality the low stratus deck should hold together.
Building high pressure will return dry weather and seasonable temperature by mid week. Still some potential for freezing drizzle N of PIT and in the ridges tonight as moisture becomes marginal for ice in the dendritic growth zone, though this appears minimal as mixing continues and cig heights rise above 1000ft. With low level moisture in place, upslope in the ridges could result in enough ascent to maintain a slightly better potential of freezing drizzle overnight. Such shallow moisture evident in forecast soundings may support the development of areas of drizzle / freezing drizzle again Tuesday but have opted to allow later shifts to refine precipitation type with updated guidance.
An upper ridge over the eastern Plains will build eastward on Tuesday, as a trough moves east of the Rockies. This ridge will generally break down as it nears the TN Valley, though weak height rises will combine with mostly clear skies to help temps warm into the mid to upper 50s. As the trough progresses eastward, a low will cut off over the TX Panhandle as the subtropical jet strengthens. As this low/trough propagates eastward and into the Mississippi Valley, southwesterly flow will result in moisture return over the region with clouds increasing Tuesday afternoon and into Tuesday night.
550 PM CST Mon Jan 27 2020 VFR conditions with clear skies will prevail this evening as a weak area of high pressure pushes east of the area. Trof to become cut off, which will slow its ewd progression quite a bit. As a result, shwrs/tstms will continue through Tuesday night, as the trof axis moves ovhd.
643 PM CST Mon Jan 27 2020 Currently seeing cloudy skies across the region with light winds under high pressure. High pressure slowly shifts east late tonight as upper wave approaches from the west. High pressure will be over eastern North Dakota this evening and over northwestern Minnesota overnight. Next 500 mb short wave trough over Montana will move east and a band of light snow mainly due to 850 mb warm advection will move into W ND tonight and into central ND Tues morning/midday. By Thu night, the approach of a warm front will introduce more moisture which, combined with some synoptic forcing, could mean some light snow at times Fri with better chances Fri eve into the first part of Sat.
The longwave trough approaching the area tonight continues to amplify with plenty of low-level moisture having moved into the area today. Decided to keep it with an advisory for now since some of the QPF will be falling as rain or a mix instead of pure snow, but will be watching the trends in the low- level thermodynamics closely.
Can't rule out some drizzle or freezing drizzle at times tonight. Lows tonight will be around 31 across most of the area, but a little warmer along the Arkansas Border with lows in the mid 30s.
Clouds have been slow to clear across parts of Southeast Texas today resulting in cooler than expected afternoon highs (so far). Storm system and associated cold front are still on schedule to move into and across the area tomorrow. This activity will spread eastward during the day, and it should be all to the east of the I-45 corridor around or shortly after 6 PM when the cold front moves through the area.
Precip chances will increase by the weekend as an energetic north Pacific jet propagates into North America and an amplifying Alberta-clipper-like trough digs into the Great Lakes.
Warm temperatures today with a weak cold front associated with the system will be a challenge to get snow accumulations as temperatures at the surface are expected to linger around 32 degrees.
Because of the cloud cover, stayed on the warmer side of guidance with lows generally mid to upper teens.
This will allow for light return flow Tuesday ahead of a low pressure system moving over the Southern Plains. This low pressure system will shift east through the day and help develop light rain over our western most zones by mid afternoon. Temperatures tonight will range from the upper 30s northeast to the lower 40s southwest which is slightly warmer than normal.
A low pressure system with a cold front is in north Texas and will move toward Arkansas tonight and Tuesday.
Temperatures are currently in the low/mid 40s across much of the area as of 8 PM, although locations in the TN Valley have already dropped into the upper 30s. A stellar afternoon underway across the Mid-South with mostly sunny and mild temperatures as weak high pressure builds into the region.
A brief ridge of high pressure will put an end to shower activity this evening and allow for a period of clearing skies. Mountain snow and valley mixed precipitation will become widespread late tonight into Tuesday morning as a warm front enters the Northern Rockies. A brief period of freezing rain is also possible Tuesday morning before temperatures warm above freezing across northwest Montana. Due to the combination of snow and potential for freezing rain, winter weather advisories have been posted for the Kootenai/Cabinet and West Glacier regions. A cold front will sweep across the area Tuesday evening with snow levels expected to drop down to 2,500 feet.
As the upper trough moves off to the east on Tuesday, a surface cold front will move south across the area during the day. Gusty north winds will follow the front, along with cooler temperatures. High temperatures will be in the 50s for much of the area tomorrow, expect along the Interstate 10 corridor, where highs in the lower 60s are expected.
515 PM EST Mon Jan 27 2020 High pressure is building down from the north, but a few more days of weather similar to today are expected.
545 PM CST Mon Jan 27 2020 High pressure will be over eastern North Dakota this evening and over northwestern Minnesota overnight. Next 500 mb short wave trough over Montana will move east and a band of light snow mainly due to 850 mb warm advection will move into W ND tonight and into central ND Tues morning/midday. By Thu night, the approach of a warm front will introduce more moisture which, combined with some synoptic forcing, could mean some light snow at times Fri with better chances Fri eve into the first part of Sat.
This is due to low level moisture becoming trapped underneath a developing/lowering subsidence inversion as high pressure noses into the western Ohio Valley. Further maintaining the presence of low clouds is subtle cool air advection in the wake of the upper trough and associated energy that continues to bring upslope-enhanced showers to the far eastern reaches of Kentucky. While mainly liquid rain for most, these may be falling as a mix with some light snow at the higher elevations above 3000 feet as temperatures hover near the freezing mark. Aforementioned low clouds will keep temperatures from falling too far, with lows generally expected to bottom out in the low 30s.
607 PM CST Mon Jan 27 2020 A mid-level trough of low pressure/weak pv-advection drops south out of Canada into the region tonight. Patchy light freezing drizzle or snow grains is anticipated as a result of this lift. Will have to keep an eye on how widespread/intense the freezing drizzle will be -possibly leading to some slick roadways. The mid-level trough/lift moves southeast of the area by daybreak Tuesday which should shut down freezing drizzle/light snow threat. For the rest of the day a ridge of high pressure will build into the region. Short wave troughs will continue to come onshore from the northern Pacific, top the weak ridging over the Rockies and then cross the central part of the country.
835 PM EST Mon Jan 27 2020 High pressure is building down from the north, but a few more days of weather similar to today are expected.
A cold front will move through the area on Tuesday with northwest winds gusting to around 30 knots during the afternoon. As the upper trough moves off to the east on Tuesday, a surface cold front will move south across the area during the day. Gusty north winds will follow the front, along with cooler temperatures. High temperatures will be in the 50s for much of the area tomorrow, expect along the Interstate 10 corridor, where highs in the lower 60s are expected.
Lows will range from the upper 20s to the lower 30s. Mid level ridge to build to our west into the Mid MS Vly with continued northwest flow over Ohio. Mid level ridge to shift a little east Tuesday night. Expect continued low level clouds with high level clouds spilling in ahead of a low in the lower MS VLY.
A flat ridge aloft will shift east tonight as an upper low and its trough axis moves TX. This will usher deeper moisture across S TX ahead of a cold front. The highest pops are across the northern CWA late tonight, shifting to the east and southeast through Tuesday morning as the frontal bdry moves across S TX. Low CAPE values over the coastal waters combined with the upper trough and low level moisture convergence, may produce a few thunderstorms along the coastline and over the coastal waters during the day Tuesday. Cooler and drier conditions are expected in the wake of the cold front by Tuesday night.
129 PM PST Mon Jan 27 2020 High pressure aloft and weak offshore flow will create warmer and dry weather to start the week.
533 PM CST Mon Jan 27 2020 A strong cold front is expected to move through the region Tuesday morning, accompanied by an abrupt wind shift to the north with sustained winds near 20-25 knots and locally higher gusts for all terminals. Model guidance seems to be in reasonable agreement in regards to the path of this system however surface temperatures are a bit in flux depending on how quickly the cold front can push through the area. While there is the potential for some wet snow flakes to fall during the early morning hours Tuesday expect surface temps to remain at or above freezing so accumulations should be non existent. As the cold front moves through, northerly winds will ramp up into the 25-30 mph range behind it and remain elevated through at least early Tuesday afternoon.
513 PM EST Mon Jan 27 2020 A cold front will approach from the north this evening, then cross the area tonight. Weak high pressure builds over the area Tuesday.
302 PM MST Mon Jan 27 2020 Upper level trof that brough scattered rain and snow to the area today will slowly shift east of the area overnight. Behind the exiting system, ridging builds in from the west. Subsidence and warmer temperatures aloft will strengthen inversion over western valley locations helping to increase wind speeds from Livingston to Nye as pressures fall lee of the Rockies.
Road temps are running 3-4F warmer than air temps so only wet conditions should result. Thus will continue the small potential for drizzle/freezing drizzle and very light snow for tnt-Tue AM.
High pressure will briefly build back over Utah and southwest Wyoming tonight into Tuesday morning.
729 PM EST Mon Jan 27 2020 A cold front will approach from the north this evening, then cross the area tonight. Weak high pressure builds over the area Tuesday.
551 PM CST Mon Jan 27 2020 Windy conditions will continue overnight as upper trough moves across the region. /issued 257 PM CST Mon Jan 27 2020/ An upper level trough is bringing strong winds to the Guadalupe Mountains this afternoon that will continue for a few more hours before diminishing. This trough could also bring a few high based showers to southeastern New Mexico before moving east overnight. A cold front moves through the region tonight bringing windy conditions that will border on advisory level Tuesday for the Permian Basin.
Trof to become cut off, which will slow its ewd progression quite a bit. As a result, shwrs/tstms will continue through Tuesday night, as the trof axis moves ovhd.
Northwest winds 5-10 kts becoming more northerly 10-15 kts near daybreak, as high pressure builds in from the northwest.
A ridge of high pressure builds in beginning mid-week, resulting in dry and mild conditions.
These will dissipate by midnight as the low drifts southeast and drier, northerly wind prevail across much of the area. The dense cloud cover will shift farther south as the low approaches SW Florida overnight. Otherwise, slightly warmer and drier conditions are expected tomorrow with highs in the 70s. As the low moves southeast over the Peninsula, northeast winds will briefly reach cautionary levels overnight across the central offshore waters.
We can expect the temperatures to continue to drop into the low 40s tonight.
Spotty very light flurries continue to get shaken out of the low clouds late this afternoon. Low clouds to persist overnight and a passing weak mid-level short wave may bring a period of light freezing drizzle and/or light snow to the area later tonight into Tuesday. Also can not rule out a little freezing drizzle or drizzle with the better chance later tonight into Tuesday morning. Pavement temps currently a little above freezing but should slip to near or a little below freezing overnight. Road temps are running 3-4F warmer than air temps so only wet conditions should result. Thus will continue the small potential for drizzle/freezing drizzle and very light snow for tnt-Tue AM.
20Z water vapor imagery shows a upper trough over the Rockies. Surface observations indicate high pressure centered over eastern ND with the ridge axis extending through the central plains. An area of low pressure was slowly deepening in the lee of the southern Rockies. Eventually forecast soundings become saturated as the upper level trough axis passes overhead late Tuesday afternoon and Tuesday night. There looks to be some modest frontogenesis with the trough axis and better vertical motion for light snow. Models show the low clouds hanging on strong through Tuesday night. So have lows tonight and Tuesday night in the mid and upper 20s with Highs on Tuesday in the lower 30s.
An upper trough could bring some light precipitation to parts of the area on Wednesday.
Temperatures have cooled down into the lower 30s for locations above 2000 feet. Winter Weather Advisory until 5 AM PST Tuesday for the higher elevations around wenatchee and chelan for Waterville Plateau-Wenatchee Area.
An upper ridge over the eastern Plains will build eastward on Tuesday, as a trough moves east of the Rockies. This ridge will generally break down as it nears the TN Valley, though weak height rises will combine with mostly clear skies to help temps warm into the mid to upper 50s. As the trough progresses eastward, a low will cut off over the TX Panhandle as the subtropical jet strengthens. As this low/trough propagates eastward and into the Mississippi Valley, southwesterly flow will result in moisture return over the region with clouds increasing Tuesday afternoon and into Tuesday night. Isolated light rain will continue into the Wednesday night and then moves east of the area as the axis of the trough exits the area.
Currently seeing cloudy skies across the region with light winds under high pressure. High pressure slowly shifts east late tonight as upper wave approaches from the west. High pressure will be over eastern North Dakota this evening and over northwestern Minnesota overnight. Next 500 mb short wave trough over Montana will move east and a band of light snow mainly due to 850 mb warm advection will move into W ND tonight and into central ND Tues morning/midday. By Thu night, the approach of a warm front will introduce more moisture which, combined with some synoptic forcing, could mean some light snow at times Fri with better chances Fri eve into the first part of Sat.
A cold front will move through the area on Tuesday with northwest winds gusting to around 30 knots during the afternoon. A cold front will move through the area on Tuesday with northwest winds gusting to around 30 knots during the afternoon. As the upper trough moves off to the east on Tuesday, a surface cold front will move south across the area during the day. Gusty north winds will follow the front, along with cooler temperatures. High temperatures will be in the 50s for much of the area tomorrow, expect along the Interstate 10 corridor, where highs in the lower 60s are expected.
Surface weather analysis early this morning depicts a very slow moving warm front moving eastward across central North Dakota, with an area of light snow in the vicinity of the front.
318 AM EST Tue Jan 28 2020 Weak high pressure will take hold of the area today through Wednesday. Mid level short wave trough moving through the area this morning was spreading clouds into Lancaster and Chesterfield counties. Weak high pressure will build across the area today and tonight.
/issued 533 PM CST Mon Jan 27 2020/ A strong cold front is expected to move through the region Tuesday morning, accompanied by an abrupt wind shift to the north with sustained winds near 20-25 knots and locally higher gusts for all terminals. Model guidance seems to be in reasonable agreement in regards to the path of this system however surface temperatures are a bit in flux depending on how quickly the cold front can push through the area. While there is the potential for some wet snow flakes to fall during the early morning hours Tuesday expect surface temps to remain at or above freezing so accumulations should be non existent. As the cold front moves through, northerly winds will ramp up into the 25-30 mph range behind it and remain elevated through at least early Tuesday afternoon.
Dry conditions are then forecast regionwide over the remainder of the week as high pressure builds over California.
1013 PM MST Mon Jan 27 2020 Current surface map places warm front over eastern Montana into eastern Wyoming. Snow associated with upper trof is spreading into northeast Wyoming. Next upper trof in progressive flow approaches the area Wednesday with trof splitting as it moves onto the plains.
1144 PM EST Mon Jan 27 2020 A cold front will cross the area tonight. Weak high pressure builds over the area Tuesday. Another cold front crosses the area Tuesday night and Wednesday morning.
Modest cold advection with this wave may be just enough to steepen up the low level lapse rates and increase cloud depths to generate flurries/very light snow showers. 850 MB temps around -10 C looks to be sufficiently cold enough for ice nuclei, so the prospects for freezing drizzle appears to be very low. Ridging/low level anti-cyclonic flow extending into southeast Michigan may be enough to lower inversion heights and allow for low clouds to finally dissipate.