Aikyam-Lab/Synoptic-Bench huggingface dataset:
Broad upper level low pressure remains from northern MN to Hudson Bay to eastern Canada. Short wave trough over northern MN will rotate through the area today. High pressure over the area Saturday will give light winds and ample sunshine.
248 PM EDT Fri Apr 6 2018 A warm front will lift north across the area this evening producing a period of mixed light snow and rain. A cold front will sweep across the region overnight.
Will hit convection harder overnight as convective complex ahead of cold front surges southward. Convective threat should end with passage of cold front during the morning hours, but anticipate that MVFR to IFR ceilings will remain behind the front for most of the daytime hours.
Otherwise, an active day today as a cold front will move across the Panhandles. But what may actually result is a low cloud deck, and possible freezing drizzle. Lows across the south will be in the lower to mid 20s and lows across the central and northern Panhandles will be in the mid teens to lower 20s. Wind chill values tonight into Saturday morning will be the lowest we've seen in quite some time.
1257 PM PDT Fri Apr 6 2018 A low pressure system will move through California on Saturday.
A strong cold front is pushing south across western parts of the Red River Valley and should enter our far northern counties between 4 PM and 5 PM. With the approach and arrival of the cold front, some of the hi-res models indicate the potential for isolated thunderstorm development in a few of our far eastern counties, between about 4 PM and 9 PM. Fairly strong and gusty north winds will follow passage of the cold front and continue overnight into Saturday morning. With early Saturday morning low temperatures expected to be near or just below freezing across the Big Country area along/north of I-20, we have upgraded the Freeze Watch to a Freeze Warning.
By the time the bulk of the precip arrives later tonight into Saturday morning, progged thermal soundings suggest all snow as the precip type and surface temps falling to near or below freezing. Still believe main travel impacts would be on elevated roadways such as bridges and overpasses toward and just after sunrise Sat. Another widespread freeze will be likely Sat night as skies clear and high pressure moves in close the region.
415 PM CDT Fri Apr 6 2018 Well, the cold front is here.
255 PM EDT Fri Apr 6 2018 A cold front currently draped from the Ohio River Valley through Tennessee southwest into north TX is workings its way south through the remainder of the afternoon. Meanwhile, aloft, a series of impulses rounding the trough situation across the eastern half of the US will pivot through the SE during the short-term. As the trough digs further south into MS/AK, the upper level jet entrance region will help promote lift through the column.
1120 AM MDT Fri Apr 6 2018 An upper low over Hudson Bay and associated long-wave trough over the central/eastern CONUS were dominating the weather pattern. At the surface a reinforcing cold front was moving south through most of the CWA by 09z. An upper low will move over the Pacific Northwest on Saturday, with considerable low-level warm advection ahead of the system. However, expect the low-level inversion to hang tough in snow-covered areas, and also for cumulus to develop in areas that do mix out.
With time though, ceilings will drop to MVFR or IFR levels as rainfall continues to moisten the lower parts of the atmosphere. While a strong cold front will move into the region late in the period, expect any wintry precipitation to hold off until after the period ends.
1251 PM CDT Fri Apr 6 2018 Expanded Advisory area downstream through the Omaha metro area as reports of flash freezing on some roadways were being reported by law enforcement in the area. Temperatures falling into the lower and mid 20s with increasing winds at mid morning with little in the way of recovery expected. Satl imagery this morning showing a very broad trof extending across the CONUS with increased Pacific moisture streaming eastward. the leading edge of a cold front was situated from ern IA-nrn MO-sw KS.
344 PM CDT Fri Apr 6 2018 Short/near term highlights include the strong cold front that passed through the area today with breezy northerly winds.
Warmer than average temperatures will continue through the weekend with a passing system producing afternoon breezes, some clouds at times and a few showers over the White Mountains Saturday night. Clouds will diminish Saturday afternoon as the upper level ridge crests over the area. Saturday will be much the same with the high temperature creeping up a degree or two or 8-12 degrees warmer than average. 5 degrees warmer than average.
A cold front pushed east of the area overnight as high pressure moved into western Iowa. For tonight, cold high pressure will build into the region, with near record lows in the teens expected at 3 of the 4 main climate locations. Saturday and Saturday Night Cold with highs in the low to mid 30s north to around 40 F south.
Very light accumulations of sleet and snow look to be the predominant precip types, though some freezing rain mixed with is very possible across parts of eastern Oklahoma as the colder air deepens.
This will be a warmer system, so expect to see mostly rain at lower elevations. Concerns for any flooding are quite low, as temperatures in the high country do not appear warm enough to ripen the snowpack and potentially lead to a threat for significant runoff into small streams.
636 PM EDT Fri Apr 6 2018 Low pressure will move north of the region tonight through Saturday.
Potent cold front will continue to sink south today allowing arctic air to spill across the central and southern Plains. These warmer temps are expected to continue through Thu. This will keep RH values on the high side.
Upper ridge will build in Saturday resulting in a much warmer day than today, but persistent upslope gradients will keep winds out of the east thus keeping our warm up modest (in addition to any lingering stratus). Cannot rule out a risk of freezing rain ahead of the surface front, but there is a good deal of uncertainty as this will depend on surface temps. Baker/Ekalaka should stay sufficiently on the cold side of the surface front to avoid a risk of freezing rain, but could see a quick 2-4 inches of snow.
We've seen temperatures struggle through the low 50s elsewhere due to thick and persistent cloud cover over the southern half of the mid state. Expect showers to increase in coverage this afternoon with a few rumbles of thunder possible through this evening before a cold front arrives from the northwest later. Have addressed the cooler temperatures in the updated forecast package. A cold front will sink down from the northwest and move east and south, bringing northerly winds and a possible mix of rain and snow Saturday morning.
253 PM EDT Fri Apr 6 2018 Low pressure will move north of the region tonight through Saturday.
But as the cold front pushes through on Saturday, temperatures will then start to fall.
145 PM MST Fri Apr 6 2018 Weather systems will remain well north of the area through the week resulting in dry conditions and warmer than average temperatures. High temperatures in the 90s will be common across the lower deserts.
This will develop increasing return flow and allow for some warmer air to move into our area. On Saturday, a deep upper level low off the northwest Pacific coast will eject a strong embedded S/WV east into the Montana Rockies.
The thermodynamic profile suggests this instability could be rooted in temperatures near or slightly above freezing. Near the surface temperatures warm back above freezing, which is not conducive for freezing rain, but sleet may be able to reach the surface within any convective showers. The higher sun angle under clear skies will assist in modifying the arctic air mass in place. Highs should reach the lower to mid 40s, but the dew points will not recover. Also given a lot of the lift is focused below -10 C, which could result in more freezing rain and or freezing drizzle.
456 PM MDT Fri Apr 6 2018 Current surface analysis shows cold front well south of the area, with high pressure centered over far northeast MT. Another cold night is on tap for the area, with lows mainly in the 5 to 15 degree range, as high pressure to the north slides southeast across the Northern Plains. Some milder air will return on the back side of the high Saturday as winds turn to the south and southeast.
High pressure will be East of the region through this evening, then sink to the Southeast Tonight. A cold front will reach the far Northwestern boundary of the forecast area Saturday afternoon. With the low level jet, storms will have a fairly rapid movement. Lows around 60 will be expected Tonight, except a little warmer at the beaches.
A couple of reinforcing shots of colder air are moving into the broad long wave trough over the eastern half of the country.
307 PM CDT Fri Apr 6 2018 Skies are cloudy across much of the forecast area this afternoon with temperatures ranging from around 50 degrees to the lower 60s. The rain is ahead of a cold front which currently runs northeast Ohio through southeast Missouri and into northwest Texas. The cold front will continue to push slowly southeast tonight with more rain expected to develop ahead of the front this evening. By Saturday, the cold front will be just south of the forecast area so some light precipitation is expected in the morning. High pressure will settle into the region by Saturday night which allow skies to clear and temperatures to be quite cold for early April.
With temperatures near the freezing mark Saturday morning, more persistent snow could result in some slick roads. But confidence in meaningful impacts is low given temperatures are currently in the lower 60s. Saturday night will feature deep northwest flow with surface ridging centered over the Midwest. Lows Saturday night will plunge into the low to mid 20s, and freeze headlines will be necessary.
358 PM CDT Fri Apr 6 2018 Skies are clear across the region as the cold high pressure system continues to build in.
High pressure remains in control over the waters allowing for nice weather across the region for another day.
1109 AM MDT Fri Apr 6 2018 A decent cold front moved across the plains this morning. In addition, a cold front will move southward over the northeast plains of Colorado this morning which will usher in much colder air along with shallow upslope flow. Cross-sections continue to show abundant moisture embedded in the westerly flow, however, there is considerable warm air advection going on in the lower to mid levels. Across nern CO as the low lvl sfc gradient increases by aftn expect gusty south winds across the plains with warmer temperatures. However, over the far nern corner, temps won't warm as much as compared to areas closer to the foothills where readings may reach the lower 60s. For Sat night into early Sun an upper level trough will move across the area along with a quick shot of mid lvl ascent.
324 PM EST Fri Nov 24 2017 High pressure will extend over the area tonight with low pressure moving across to the southeast. A dry cold front will move through from the northwest Saturday night.
With the high pushing ewd today, expect winds to turn more srly through the afternoon but otherwise remaining on the light side. 11Z sfc analysis shows a center of high pressure over the area which has resulted in calm winds and VFR conditions across the area overnight. /issued 325 AM CST Fri Nov 24 2017/ Area remains in northwesterly flow with trough axis situated over the SE US. Winds will gradually become southerly this afternoon and high pressure shifts off to the east and this will begin a moderating trend with temperatures expected to get back into the low to mid 70s on Saturday ahead of the next cool front expected to cross the area Saturday night.
200 PM MST Fri Nov 24 2017 A cold front is currently moving across the area early this afternoon with north winds gusting 30 to 40 mph.
103 PM EST Fri Nov 24 2017 High pressure passes to the south through this evening, then weakens later tonight into Saturday as offshore low pressure passes well to the southeast. A cold front will move through Saturday night.
At upper levels, ridging was located over Baja California with a trough along the east coast. A reinforcing trough was located over the northern plains.
138 PM MST Fri Nov 24 2017 West flow aloft with weak ridging over the western U.
/issued 1015 AM EST Fri Nov 24 2017/ Main weather feature this morning has been the premature turning of winds to the northwest as trough has moved through earlier than anticipated. As the front departs the area late on Friday into early Saturday, rain chances will diminish as drier, cooler air begins to enter the region.
Relatively mild continental air will continue across the region over the weekend, but temperatures will prove a bit cooler for Saturday in post frontal air mass.
Chilly but pleasant morning occurred and temperatures are rising into the lower 60s today. /28/ Prior discussion below: Today through Tonight: Latest Rap and Satellite imagery showed the region under northwest flow aloft with the upper trough tracking east of the forecast area. For today into tonight an upper trough axis which will be associated with a cold front will approach the region from the north. This will be associated with an upper jet pushing into the Southern Plains toward the Lower Mississippi Valley. Under some high clouds highs will be from the lower to middle 60s. Lows will moderate under the cloud cover with readings in the upper 30s to the lower 40s. Highs on Saturday will reach the upper 60's with some areas topping 70 before cooler air begins to filter into the region.
1220 PM CST Fri Nov 24 2017 Soggy conditions are in store for today, with cooler temperatures for Saturday. A wintry mix will be possible when the colder air behind the cold front finally arrives later this evening, in the form of a drizzle/freezing drizzle/rain/snow mix. Also, some gusty west to northwest winds are expected today, mainly over northeast Minnesota, as the cold front passes through. Cooler temperatures will return tonight and Saturday as cold air advection increases once the cold front passes through. There could be some slick roads tonight due to refreezing, especially over the north, this evening as there should be a chance of freezing drizzle possible. A mostly dry day for Saturday, with cooler temperatures as highs are forecast to range from the lower 20s over the tip of the Arrowhead to the lower 30s over the southwest.
Cold front has pushed through the region with precipitation diminishing behind it.
242 PM CST Fri Nov 24 2017 18Z surface data has a cold front running from central Lake Superior southwest into Nebraska. Tonight, quiet and dry conditions along with diminishing winds will be seen as the cold front moves through the area. The quiet and dry weather will continue on Saturday but with much cooler temperatures. Most days temperatures will tend to be a few degrees wider than forecast diurnal range or slightly warmer highs and cooler lows.
Cooler air aloft will bring temperatures in the northcentral mountains down compared to this morning, while cloud cover across the valleys should keep temperatures in the Hayden to Steamboat corridor fairly similar to this morning. Breezy northwest flow aloft due to a 100+ kt jet overhead will keep conditions breezy in the high country of NE Utah through early Saturday morning, and into the mid afternoon hours across western Colorado.
149 PM CST Fri Nov 24 2017 After record setting warmth this afternoon, temperatures will remain unseasonably mild over the weekend as the air behind the cold frontal passage tonight will be of modified Pacific origin.
1128 AM CST Fri Nov 24 2017 Updated aviation portion for 18Z TAF issuance Warm and rather windy today, then cooler (but still above normal) for the rest of the holiday weekend. and Saturday A strong cyclone will track across central Ontario today. It will probably be greatest in the north--closer to the parent cyclone. Cooler air will begin pushing into the area behind the front, but incoming air mass has downsloped the Rockies and won't be that cold. Edged temps toward a blend of top performing guidance products, on Saturday, as that was a little warmer than the standard forecast initialization grid.
203 PM EST Fri Nov 24 2017 Seeing our pressure gradient tighten ahead of a cold front moving into the Upper Midwest now. The added cloud cover and steady southerly winds will mean warmer lows, likely dropping to the lower to mid 40s for most locations. We will have a small window to warm up during the late morning/early afternoon hours Saturday before the northwest winds bring in the cooler air. By late night though, high pressure will ridge across the region, bringing lighter winds again.
1147 AM CST Fri Nov 24 2017 Record highs for today look to be broken at many sites across the region, as downslope effects ahead of approaching cold front cause temperatures to really soar this afternoon. The cold front will slide southward across Kansas by Friday night with cooler air settling over the region, however daytime highs will still be above normal for the weekend as airmass is of Pacific origins.
In the far north, a backdoor cold front now across south central Saskatchewan and into Manitoba will slide southeast this evening and tonight. As a proxy for defining the low level cold front - per visible satellite imagery and the NAM12/RAP13 925mb-850mb isotherms, the low level front and associated stratus deck is situated between the 0C to -2C isotherms. For Saturday, a mid level ridge over the northern Rockies will keep a northwest flow across the area. Highs Saturday will range from the lower/mid 30s Turtle Mountains, to around 50 southwest and south central.
/ISSUED 1003 AM CST Fri Nov 24 2017/ Max temps appear on track for the low to mid 70s based on morning obs. The air mass over the region is till very dry and a large diurnal range in temperatures is expected with high temperatures today warming into the lower and middle 70's. Warmer temperatures are expected tonight as low level moisture deepens. A weak cold front will cross SE TX Saturday night but moisture remains limited and upper level forcing is weak so again no precip is expected along the front.
230 PM CST Fri Nov 24 2017 Following a minor trough in NW flow tonight and an accompanying cold front, heights will amplify and trend more anticyclonic ahead of progressive ridging for the weekend.
Besides the fog, VFR conditions will pervail with surface ridging producing generally light winds less than 10kts.
456 PM EST Fri Nov 24 2017 High pressure over the area tonight will weaken Saturday.
BTL The tail end of a cold front is sliding west to east through Modoc County this morning with some light rain and snow showers. Meanwhile, mostly clear skies and mostly below freezing low temperatures exist east of the Cascades in Oregon, while a mix of low clouds, fog, and clear skies exist west of the Cascades. West of the Cascades, in addition to the higher clouds streaming in, expect fog and low clouds will take until mid-afternoon to mix out of the lower Klamath River Valley, Illinois Valley, and Umpqua Basin of Douglas County.
210 PM CST Fri Nov 24 2017 The cold front across Minnesota will exit out of the eastern parts of the forecast area early this evening. Once the front moves through, there will be a period of gusty northwest winds but look for these to settle down during the late evening and overnight hours as an area of high pressure builds in from the west. This high will continue to move east and by late Saturday afternoon the ridge axis should extend from Minnesota into Kansas. This will give the local area a quiet day with mostly sunny skies expected and cooler temperatures with highs topping out in the 30s and 40s.
1031 AM MST Fri Nov 24 2017 Latest analysis shows an upper trough dropping southward across eastern Montana and western North Dakota early this morning in line with the surface cold front. Expect some light rain with the frontal passage this morning, especially over the northern Black Hills, with dry weather this afternoon as high pressure builds into the region.
253 PM EST Fri Nov 24 2017 High pressure provides dry weather through tonight. A cold front crosses Saturday with limited moisture.
325 PM EST Fri Nov 24 2017 High pressure will bring mainly clear skies and mild temperatures to the region into tonight. A cold front will bring some light rain showers on Saturday.
A cold front will move through starting in the northwest early this evening moving through the entire area by morning. A weak cold front will move south across the area tonight with only minimal cooling and a moderate north wind.
306 PM CST Fri Nov 24 2017 Cold front is approaching the region from the NW this afternoon, compressing the pressure gradient and resulting in a blustery afternoon. These winds are out of the SW with a mid level thermal ridge drifting east. Tomorrow, cool air will keep the highs in the low 50s, with light NW winds. The pattern sets up to repeat again with a cooler weekend behind the front.
221 PM CST Fri Nov 24 2017 (Tonight and Tomorrow) An upper level ridge across the western half of the U. Otherwise, another dry cold front will move into the Big Country early tomorrow morning just before 12Z. This will keep temperatures much cooler tomorrow with highs forecast to be in the upper 60s to lower 70s.
235 PM CST Fri Nov 24 2017 Breezy southwest winds will diminish this evening as a cold front approaches from the northwest. With the lower layers of the atmosphere remaining dry, only expect mid and high level clouds to accompany the front through the area. Temperatures will be some 10 degrees cooler on Saturday, but still remaining above normal for late November with highs in the upper 50s to lower 60s.
210 PM EST Fri Nov 24 2017 High pressure will remain over the Carolinas through tonight then weaken Saturday. A dry cold front will approach from the northwest Saturday afternoon and cross our region Saturday night.
300 PM EST Fri Nov 24 2017 High pressure will bring mainly clear skies and mild temperatures to the region into tonight. A cold front will bring some light rain showers on Saturday.
At the surface, low pressure developing off the Northeast Florida coast is pulling dry air into the region at lower levels, while clouds associated with the low remain well to the east. An inverted trough over the eastern Gulf of Mexico may touch off some showers of the marine area overnight. Look for lows in the lower 40s inland to upper 50s coast.
The main aviation concern will be a wind shift out of the north as a slow moving cold front pushes across the Panhandles.
1220 PM EST Fri Nov 24 2017 High pressure provides dry weather through tonight. A cold front crosses Saturday with limited moisture.
252 PM EST Fri Nov 24 2017 High pressure will remain just offshore of the mid-Atlantic through tonight. A cold front will cross the region Saturday and move east of the Chesapeake Bay Saturday night.
201 PM EST Fri Nov 24 2017 High pressure provides dry weather through tonight. A cold front crosses Saturday with limited moisture.
130 PM MST Fri Nov 24 2017 Current surface map show cold front well south of the forecast area. High pressure builds across the area for tonight and Saturday with mostly clear/sunny skies and light winds.
140 PM EST Fri Nov 24 2017 High pressure will remain over the Carolinas through tonight then weaken Saturday. A dry cold front will approach from the northwest Saturday afternoon and cross our region Saturday night.
Showers along a cold front, which extends across south-central Idaho near Twin Falls, will continue to move off to the east and diminish through early afternoon. Weak high pressure will lead to dry weather and mostly clear skies for southeast Oregon and the remainder of SW Idaho.
210 PM MST Fri Nov 24 2017 A cold front is currently moving across the area early this afternoon with north winds gusting 30 to 40 mph.