Aikyam-Lab/Synoptic-Bench huggingface dataset:
144 PM EST Sun Feb 25 2018 A cold front will cross the region late today. High pressure with mild temperatures will move over the area for the early and middle work week.
No significant travel concerns expected at this time, but temperatures peaking near freezing at some locations could cause some refreezing to patchy ice on roads. Increased snow chances for near/north of Devils Lake basin and through northwest MN this morning, continuing in northwest MN early this afternoon as broader upper forcing from the nearby upper low causes scattered light snow. As temperatures approach 30F could be some melting and refreezing that could cause minor travel issues. Westerly flow/warm front will approach and move through the region today and temperatures should climb into the 20s or low 30s.
1013 AM CST Sun Feb 25 2018 Increased snow chances for near/north of Devils Lake basin and through northwest MN this morning, continuing in northwest MN early this afternoon as broader upper forcing from the nearby upper low causes scattered light snow. As temperatures approach 30F could be some melting and refreezing that could cause minor travel issues. Westerly flow/warm front will approach and move through the region today and temperatures should climb into the 20s or low 30s.
Mountain cameras show light snow falling in most of the higher mountains early this morning. We look for another 1-2 inches over the higher slopes generally above 9500 feet this morning, with a dusting to one half inch in valley locations. Some blowing snow will also occur over exposed mountain ridges and areas above timberline. The lower atmosphere will once again become well mixed late this morning into the afternoon with breezy conditions developing. Today's gusts in the lower elevations should generally peak at 25-35 mph, with the stronger gusts near the foothills and Wyoming border.
1108 AM CST Sun Feb 25 2018 As of early this morning, clear skies and cool temperatures are in place across the region as the strong lead wave and associated cold front have pushed well east of the region. While most of the day will be sunny, an increase in clouds will be noted this afternoon and evening as the base of the primary trough approaches the area.
132 PM PST Sun Feb 25 2018 Our dry and mild offshore pattern will turn back onshore on Monday, returning marine air and cooler weather.
130 PM EST Sun Feb 25 2018 High pressure builds into the area tonight, but is shunted back by a wave passing to the south overnight into Monday. The high builds back in Monday night.
A cold front is forecast to arrive at HOB and CNM later this afternoon causing winds to shift out of the NW with a few lingering gusts. /issued 315 AM CST Sun Feb 25 2018/ Most locations have dipped near or below freezing early this morning with very dry air in place. Winds should not be as strong as yesterday, but temperatures will be slightly warmer. By Monday, an upper level trough will begin to dig along the West Coast of CA. Ahead of this storm, warmer conditions and moisture will return to the area as southerly flow increases.
Deep layer ridging across the CWA will weaken as an upper level trough and surface front continue to track eastward tonight.
244 PM CST Sun Feb 25 2018 A mid-level wave traverses the area tonight, although with high pressure in place will see little more than some clouds this afternoon moving eastward tonight. The clear skies and dry conditions continue through tomorrow as the high shifts east of the area. On the lee sides of the Rockies in Colorado, a deepening low pressure will increase the pressure gradient over central Kansas. Gusty winds up to 30 mph will be seen across the western half of the CWA, along with minimum RH values in the low 20s.
315 PM EST Sun Feb 25 2018 A cold front will stall near the area overnight into Monday.
910 AM PST Sun Feb 25 2018 Freeze Warning was allowed to expire, Dry weather and temperatures near normal today will be followed by a cold front arriving Monday and bringing precipitation to the region.
1242 PM MST Sun Feb 25 2018 Upper trough continues to push across the central states, with another wave moving into the Pacific Northwest, and ridging in between. Surface winds are southwesterly around 10-20 kts, with a weak warm front moving into the CWA. Warmer air will continue to advect into the area on Monday, with the region under southwest flow.
Initially brisk west winds will gradually decrease today as high pressure moves into the Ohio River Valley under a weakly confluent flow aloft. The low clouds should shift east of the forecast area by mid morning, followed by near full sunshine through at least mid afternoon.
In the middle and upper levels(700-200 mb), latest available satelitte imagery overlaid with model streamline analysis as of 200 pm, continue to depict an expansive low amplitude trough encompassing the Central and Western CONUS, with ridging along the Eastern Seaboard. At the surface, latest marine and land observations and analysis as of 200 pm, detail the axis of a 1020-1024 mb ridge axis which presently extends from about 30 N 70 W, west southwest to across North Florida and into the SW Gulf of Mexico. As of 200 pm, temperatures across the islands are in the Lower 80s with dewpoints clinging around 70 degrees.
240 PM EST Sun Feb 25 2018 19z sfc analysis shows just about all of eastern Kentucky now in the wake of a departing cold front. This front is taking the lower clouds east along with it as high pressure bubbles in from the west. The relaxing of the pressure gradient from this high's approach has lightened the winds, though they are still cold advecting - generally from the northwest. Temperatures currently vary from the low 50s northwest to the upper 50s southeast while dewpoints range from low 40s west to the lower 50s in the east. They all depict broad southwest flow continuing over the area between strong ridging above Florida and troughing north of the Great Lakes down to the Southern Rockies. The tail of the northern trough will weaken and head into the Ohio Valley later tonight into Monday morning.
308 PM CST Sun Feb 25 2018 An upper trough will push east across the Panhandles this evening and will usher in a surface boundary tracking north to south across the forecast area.
205 PM EST Sun Feb 25 2018 A cold front crossing the area this afternoon will stall near the area overnight into Monday.
149 PM MST Sun Feb 25 2018 Strong pacific trough over the Pacific NW today in the process of splitting with one piece to move over southern Canada while the southern piece cuts off late tomorrow and drops south. Fairly quiet conditions then ensue starting tomorrow with a weak cold front shutting off the wind energy by the afternoon.
345 AM CST Sun Nov 12 2017 (Today and Tonight) Changes to the weather are in store beginning later this morning as another weak cold front is expected to pass through the area. A weak cold front is then expected to move into the Big Country and the Interstate 20 corridor a few hours after sunrise. Otherwise, high temperatures for this afternoon will be in the upper 50s in the Big Country to the lower 70s across the Northwest Hill Country. Then, low temperatures for tonight will drop into the low to mid 50s.
422 AM EST Sun Nov 12 2017 High pressure will cross the region today then exit across the maritimes Monday.
/issued 349 PM CST Sat Nov 11 2017/ (Tonight and Sunday) Ahead of another cold front tomorrow, expect low clouds, drizzle, and fog later tonight. The cold front will likely arrive at our Interstate 20 corridor a few hours after sunrise.
Even more mild overnight compared to the previous night, with a moderating airmass and occasionally breezy west winds keeping the lower levels well mixed. Upper ridging will be in place over the Rockies to start the work week. Both the operational models and their ensembles continue to suggest deep troughing off the Pacific NW coast will continue to get reinforced through mid week.
Clouds will keep overnight temperatures considerably warmer than last night with lows in the upper 40s to upper 50s. An upper level trough will swing across the Ohio Valley Sunday, pushing a weak cold front across the area Sunday night.
127 AM EST Sun Nov 12 2017 Arctic high pressure will extend across the eastern United States today. The presence of the ridge will maintain a relatively dry and chilly air mass across central NC. Thus, temperatures will cool quickly after sunset, with many locations at or below freezing by midnight. An earlier arrival, will deter sunshine and lead to cooler than forecast temperatures. Conversely, the longer sunshine prevails, afternoon temperatures may potentially be a couple of degrees warmer than forecast. The increasing clouds will tend toward warmer overnight temperatures, ranging from the upper 30s NW to the mid 40s SE. Highs will be mainly in the upper 50s to very low 60s, with little variation across the area, as highs in the normally warmer east will be hampered by the sky and precip trends.
431 AM EST Sun Nov 12 2017 High pressure will slide into the northern Atlantic during today, while a trough of low pressure pushes into the Ohio Valley. That trough of low pressure will move across the area and off the coast late tonight through Monday.
Will continue the low pops over mainly Jones/Lyman counties. As for the precipitation type, profiles show a layer aloft that is above freezing, but just barely so, and wet bulb effect could result in snow reaching the surface. Return flow and warm advection sets up for Sunday with a light southwest component for the James valley - and as such tuned temperatures a bit warmer for our area.
123 AM EST Sun Nov 12 2017 Dry Canadian high pressure over the eastern half of the country will move offshore tonight. Clouds increasing tonight with a weak cold front crossing the area Sunday night into Monday.
Precipitation chances will increase with the passage of a cold front Monday afternoon and evening.
1041 PM MST Sat Nov 11 2017 Water vapor shows upper trof working through the Rockies into the Plains, with distinct short wave along the MT/WY border. Short wave/cold front will advance eastward across the region this evening with some associated light rain/snow showers, ending across our eastern zones around midnight. Very mild and dry air expected early this week with flat upper ridge overhead.
353 AM EST Sun Nov 12 2017 Weak low pressure will move east across the region today and today night. High pressure will build back across the region Monday and remain in control into midweek. Otherwise weak low pressure will move through the OH vly from late this afternoon through tonight. Deep moisture will spread into the area from the southwest with the low. Will bridge the two with chance pops this afternoon west. High pressure builds in on Monday as moisture pulls east.
124 AM EST Sun Nov 12 2017 High pressure moves off the Mid Atlantic coast tonight. A trough of low pressure moves across the area Sunday night and Monday.
This will change a little today as moisture should be able to move slightly farther inland as the weak trough over the north central gulf connects to a diffluent pattern aloft thanks to the northern jet moving into the area. A new cold front will move into the area Monday morning forcing all this activity southward and bringing back the dry weather which will stay around for the remainder of the work week.
330 AM CST Sun Nov 12 2017 High pressure over the Northern Plains early this morning will move east and south through the day. Temperatures below freezing and the fog may create slick spots on untreated roads. Expect highs today from the mid to upper twenties over far northern Minnesota to the lower to middle thirties from the Brainerd Lakes Region into northwest Wisconsin. The ridge will pass east of the area tonight with a zonal flow aloft. A southerly low level flow will develop on Monday bringing in warmer air.
A high pressure center is located in New England and strong surface ridging continues across the eastern US coastline, creating a tight pressure gradient across Florida, the eastern Gulf and western Atlantic. At the surface, a disorganized trough of low pressure will slide eastward across the Caribbean and western Atlantic, increasing moisture across the Keys and South Florida Sunday and into Monday. Sunday night/early Monday, an upper level trough will shift through the Ohio River Valley, shifting to the Eastern US Monday morning, ushering more upper-level support for disturbed weather across the Florida Keys.
439 AM EST Sun Nov 12 2017 High pressure will slide into the northern Atlantic during today, while a trough of low pressure pushes into the Ohio Valley. That trough of low pressure will move across the area and off the coast late tonight through Monday.
Forecast lows have been tweaked up a bit, especially in Central New York where the high clouds will be most prevalent. High pressure is in charge at the surface, but aloft a brisk zone flow will cause high clouds to increase and thicken overnight. While the sky will become quite opaque Sunday from moisture continuing to stream ahead of the next weak system in the upper-to-mid levels, no precipitation is expected during the daytime due to the presence of very dry air in the low levels.
246 AM MST Sun Nov 12 2017 Current surface map places high pressure across the eastern Dakotas. Warm and dry conditions expected early this week with flat upper ridge overhead.
1218 AM EST Sun Nov 12 2017 Aviation Low pressure moving toward Lower Michigan tonight will bring a mix of precipitation from light snow to light rain to perhaps some light freezing rain that will end late Sunday. Forecast soundings suggest the pcpn will begin as snow but then try to transition to some freezing rain. This doesn't look like a classic freezing rain event. Forecast soundings tonight do show a narrow wedge of warmer air near h8, but not really pronounced. Overall, we'll probably see some light freezing rain briefly late tonight and Sunday before the sfc warms and pcpn transitions to mixed rain and snow. Precipitation will end Sunday evening as the wave moves east and high pressure follows for Monday and Monday night.
High pressure aloft across the region tonight will shift east into Colorado during the day Sunday. An increasingly warm and dry southwest flow aloft behind the exiting high pressure will generate above normal temperatures across the region through Monday.
303 AM EST Sun Nov 12 2017 High pressure to the north will gradually weaken and slide offshore today. A weak coastal trough and low pressure area will develop Sunday Night through Monday, with a cold front moving through the area Monday.
The opacity of these clouds have been successful in preventing the radiational cooling that was possible given high pressure and a dry airmass. Some weak lift due to differential cyclonic vorticity advection will overspread the area late tonight, but forecast sounding suggest the low-level dry air associated with the antecedent airmass will hang tough. As for temps, have favored the ECMWF MOS which is considerably warmer than MET/MAV MOS tonight. ECMWF MOS also offers a good compromise on high temps Monday between the cooler MET and warmer MAV.
1135 PM CST Sat Nov 11 2017 At 2 PM, a vigorous short wave trough was moving into the eastern South Dakota. 12z models are in agreement that as the short wave trough will move east southeast through Iowa tonight. With limited ice aloft and temperatures at or above freezing at the surface, the precipitation will be mainly in the form of rain However, on the north edge of this band will have to be watched for a wintry mix. Another thing that will have to be watched is that the dew points are still below freezing, so will have to watch for the potential of freezing rain too. High pressure settles overhead Sunday night with mostly clear skies and light winds resulting.
The strong inversion, plus the high pressure ridge over the region leading to weak winds and additional stability over the region, supports the fast spreading of the dense fog deck in place over western and central portions of the region. Bigelbach PREVIOUS DISCUSSION:A compact storm and low pressure trough moved east through southeast Montana today, sending clouds and limited precipitation to areas south of the Missouri River. Generally the melting of snow yesterday produced surface moisture that became freezing fog this morning over mostly the northern areas. The storm drops further south this evening as an upper level ridge moves across Montana tonight. Freezing fog has been persistent today in northeast areas.
If low clouds make it and high clouds streaming overhead, chances that fog will develop ahead of the cold front are fairly low. Otherwise, the cold front looks to move through around 12-14Z with low cigs (IFR-MVFR) persisting through the remainder of the TAF period. An upper level trough will move across the Upper Midwest sending a cold front south into the CWA on Sunday. Upper ridging will move over the region on Sunday as the cold front is moving into the area.
252 AM CST Sun Nov 12 2017 Today through Tonight: Latest Rap and Satellite imagery showed westerly flow aloft with low to upper ridging over the Lower Mississippi Valley. Readings prior to dawn were from the upper 40s to the lower 50s. Highs today will be around normal from the middle 60s north to the lower 70s southwest. Lows for tonight continue to be around normal from the middle 40s north to the lower 50s south.
A weak cold front will be moving to the southwest through New Mexico and west Texas this morning with winds shifting to the east behind the boundary.
Areas of fog and drizzle will continue to impact the area early this evening before increasing large-scale forcing for subsidence arrives in the wake of the mid level trough axis. Some elevated instability late Tue night may support a few thunderstorms across the eastern third of Kansas as another cold front moves south across the area. Above normal temperatures will prevail at the beginning of the period before another vigorous mid/upper trough sweeps across the Northern Plains states late Thu driving a cold front south across the area.
However, a dusting to half inch of snow is possible on grassy surfaces, as well as elevated surfaces like bridges and overpasses. Temperatures should top out just a few degrees warmer than they are now, generally mid 30s.
Upper level trough will move north of the area tonight into Monday morning bringing another chance for some light precipitation. Most of the deeper moisture stays to our north, but enough exists in out area to keep decent precipitation chances in the forecast with the highest chances being north of Interstate 40.
Cloud cover will continue tomorrow as a cold front moves into the area.
218 AM EST Sun Nov 12 2017 High pressure will maintain dry and cold weather through Sunday afternoon. Rain chances return late Sunday as low pressure approaches. With continued warm advection ahead of the low amplitude wave, most locations will remain above freezing tonight into Monday morning. Some sheltered valleys, specifically in our northeastern zones, could hold below freezing early Monday morning. It's in these locations where some light freezing rain could occur for a brief spell. With the slower and slightly warmer trend in the models combined with the bulk of likely PoPs forecast to stay of I-76, and thus as rain, the forecast will continue to trend towards low impact icing potential.
A cold front is working its way through the forecast area this morning with very low stratus and some fog trailing it by a narrow distance.
412 AM EST Sun Nov 12 2017 High pressure will slide into the northern Atlantic during today, while a trough of low pressure pushes into the Ohio Valley. That trough of low pressure will move across the area and off the coast late tonight through Monday.
313 AM EST Sun Nov 12 2017 High pressure along the east coast will weaken today allowing a cold front to cross the area late tonight into Monday morning.
A cold front will continue to slide southeast through the area tonight, turning winds around to the north. High pressure at the surface will build east over the northern and central parts of the Plains on Sunday, reaching into IA and MN by late afternoon. Monday will be warmer than Sunday (highs Monday mainly in the lower 50s) but with increasing clouds.
128 AM EST Sun Nov 12 2017 High pressure will cross the region overnight through Sunday then exit across the maritimes Monday.
1046 PM MST Sat Nov 11 2017 Aviation Section Updated Continuing analysis this evening provides higher confidence that persistent freezing fog over Blaine county will expand westward up the Milk River Valley tonight. A Freezing Fog Advisory was issued with this update, in effect through 9am Sunday. Some locations along the Milk River within the advisory area will experience dense freezing fog with visibility less than 1/4 mile. PN Building high pressure aloft will bring mostly dry and breezy conditions to the region through Sunday with temperatures remaining near seasonal averages. Elsewhere, VFR conditions are expected to prevail through Sunday as an upper level ridge slowly moves through the area. High pressure aloft will build and reside over our area through the rest of this weekend. Simultaneously, a Pacific longwave trough aloft will continue to overspread BC and near the Pac NW.
236 AM MST Sun Nov 12 2017 High pressure at the surface and aloft will be over the region today. The flow aloft will be westerly and a little weaker with the ridge overhead.
1009 PM MST Sat Nov 11 2017 Some light rain and snow showers will exit the north and east early this evening with clearing spreading from west to east through the evening as weak high pressure moves in across the area tonight and Sunday.
Strong upper high over northern Mexico will continue to bring much above normal high temperatures with a few record highs being threatened tomorrow and Sunday.
352 AM EST Sun Nov 12 2017 An area of high pressure will build east across the Ohio Valley on Monday night. The setup would be a decent for ridge/valley temperatures splits, but the lingering clouds will be a mitigating factor.
Under the high, temperatures are mainly in the single digits to lower teens, including a large portion of the northwest and north central. Temperatures aloft warm the most over the southwest as a warm front from lee side troughing in the Canadian rockies into far southwest ND lifts north and east during the day. Would think temperatures similar to slightly warmer would be reasonable here. Farther north, north of the warm front, temperatures are expected to rise only into the 20s to lower 30s along the international border, with a pretty tight gradient likely from northwest into southeast ND. Even warmer on Monday with highs ranging from the mid 30s Turtle Mountains, the mid 50s southwest.
Temperatures remain above freezing in the lowest several thousand feet, so this suggests any light precipitation should remain rain. By the time cooler air arrives early Sunday morning, moisture and forcing is limited, keeping snow mostly out of the forecast.
Ceilings and visibilities will gradually improve Sun morning as the low clouds and fog lift and burn off with diurnal heating. The trough will dissipate later this evening, with southeast flow returning to the region, drawing Gulf moisture back into the region.
As temperatures and dew points at and near the surface climb above freezing, the precipitation will tend toward all rain. However, profiles of the atmosphere indicate a saturated layer near freezing that is a few thousand feet deep. Road pavement temperatures are well above freezing so no accumulation is expected on them. An active zonal flow will result in slightly warmer temperatures and primarily two rounds of precipitation.
308 AM EST Sun Nov 12 2017 The wedge will hold strong today as the parent Canadian high pressure migrates across New England. Clouds will finally break Monday morning as a weak cold front traverses the area.