Aikyam-Lab/Synoptic-Bench huggingface dataset:
This low will continue to track east across southern Canada tonight, dragging a frontal boundary across the area late tonight into Wednesday morning. Right now, it appears the front will move through dry, with any precipitation north of the area closer to the low tonight, then south and southwest of the area on Wednesday in association with low pressure over the Southern Plains. Highs on Wednesday will be in the lower 40s to lower 50s, with the warmer temperatures across the southern CWA.
A weak system will brush by northern Utah late tonight and Wednesday with a warm front. High pressure will build in across the region in the wake of this feature bringing a warming trend through the remainder of the week.
Stronger southwesterly winds above sharp inversion may also lead to some locally enhanced wind gusts atop/downstream of the Buffalo Ridge, though gusts expected to remain shy of advisory criteria, and snow-pack wet/heavy enough that drifting snow should not present a significant hazard. Temperatures are a bit tricky given the timing of the front, though should still be among the most mild days of this week, with highs from the lower 40s over the deepest snow-pack in southwest Minnesota, to upper 50s in the lower Missouri River Valley.
214 PM EDT Tue Mar 27 2018 High pressure will remain in control this afternoon and depart the region tonight.
Models show a chance of perhaps some light rain in the higher terrain of the Appalachians and the Smokies, but expect dry conditions with no visibility restrictions at TAF sites.
A low pressure system will move across eastern Arizona today, with a continued chance for rain and snow showers. As the low pressure system responsible for the instability exits the region on Wednesday, temperatures will rebound back toward seasonal normals as dry and mild conditions persist through the rest of the week. A low pressure system will bring a chance of rain and snow showers across eastern Arizona through Tuesday evening. Dry and warmer conditions will develop on Wednesday under building high pressure.
140 PM EDT Tue Mar 27 2018 Periods of showers will occur as a cold front slowly approaches and then moves across the area into Wednesday.
410 PM EDT Tue Mar 27 2018 High pressure this evening gives way to a weak frontal system that moves across late tonight into Wednesday morning. The front then washes out near the area followed by weak high pressure Wednesday.
346 PM EDT Tue Mar 27 2018 High pressure will move east tonight allowing a warm front to approach tonight with increasing clouds and perhaps some light precipitation late tonight through Wednesday morning.
338 PM EDT Tue Mar 27 2018 Strong high pressure centered north of the region will weaken and move offshore through midweek.
314 PM EDT Tue Mar 27 2018 Wedge of high pressure over the state will begin to erode Wednesday as frontal system approaches from the northwest. This shift in the center of high pressure ridge will allow the cold air dam to erode, promoting subsidence and better insolation over the state Wednesday. As a result, expect warmer temperatures Wednesday, with highs nearly 20 degrees warmer in some areas than they are this afternoon. With approaching cold front, pops increase over northwest Georgia by Wednesday afternoon.
107 PM CDT Tue Mar 27 2018 Sunshine returns for much of the area today along with warmer temperatures the next couple of days, however rain returns to the forecast later Wednesday.
558 PM CDT Tue Mar 27 2018 An upper level low pressure system over far western New Mexico is forecast to move eastward tonight, then across west Texas on Wednesday.
310 PM CDT Tue Mar 27 2018 Surface analysis shows the cold front just northwest of the PAH forecast area, with numerous showers along and behind the front. Any break will be short lived with models bringing another area of low pressure along the front, lifting it back into the PAH forecast area.
Updated forecast to cancel the winter weather advisories for the higher terrain areas of the Upper Arkansas River Valley. \/Hodanish Today, an upper level low over southern AZ, is expected to track eastward, becoming an open wave tonight and tracking acrs NM. At 3 am snow was ongoing over the mtns and along the I-25 corridor, with a few warmer pockets of rain or a mix of rain and snow. At this time, with decreasing chance for precip many areas this afternoon, that temps will probably be in the 40s to lower 50s acrs the sern plains, with the warmest readings mainly along the lower Arkansas River Valley. The high valleys will likely see highs in the 40s this afternoon.
In the middle and upper levels(700-200 mb), latest GOES 16-R imagery overlaid with model streamline analysis as of 200 pm, depict a diving middle and upper low pressure system over the Arizona. Downstream of that, an amplified middle and upper ridge dominates both the Central and Eastern CONUS as well as the Gulf of Mexico. South Florida and the Florida Keys are fixed beneath this ridging. South Florida and the Keys lie beneath the southwestern periphery of this burgeoning early spring ridging.
Cold front has made it through the terminals with winds having shifted to more northerly behind it. Upper trough still across the desert southwest will dig a bit more to the south before ejecting out onto the Southern Plains Wed afternoon.
645 PM EDT Tue Mar 27 2018 High pressure ridging over the area will continue today with northeasterly surface flow gradually becoming southeasterly.
Spotty light freezing rain may occur in the Catskills. The rain will end Wednesday morning as brief high pressure builds over the area.
348 PM CDT Tue Mar 27 2018 A potent upper level low currently over Arizona will move eastward and transition our part of the Lone Star State by Wed evening. As the trough axis passes, the flow will become northwesterly and slowly transitions to zonal by the weekend.
412 PM CDT Tue Mar 27 2018 A longwave trough continues to dig over the southern Rockies while a surface front is stalled from southern Illinois through southern Missouri into a low over northwest Arkansas.
1039 AM PDT Tue Mar 27 2018 A cold front will bring windy conditions today with rain and mountain snow showers expected in Idaho and along the Cascade Crest.
528 PM EDT Tue Mar 27 2018 High pressure will move east tonight allowing a warm front to approach tonight with increasing clouds and perhaps some light precipitation late tonight through Wednesday morning.
High pressure continues to build into the state tonight with winds going light and variable tonight. Residual moisture from the rain yesterday and any snowmelt/snow north and with dewpoints around or above freezing should contribute toward the fog potential tonight especially in areas that are free of the low stratus. Otherwise southwesterly winds to pick up in advance of a cold front expected to drop through the area later Wednesday into Wednesday night. This should help scour out any fog/low clouds in the morning, but may still see some difficulty burning off the fog or at least low stratus in the snowpack region Wednesday with increasing moisture and waa through the lower levels.
232 PM PDT Tue Mar 27 2018 Winds are gusty and showers remain near the Cascade Crest and the North Idaho mountains this afternoon due to a cold front passage today.
1124 AM MDT Tue Mar 27 2018 Updated forecast to cancel the winter weather advisories for the higher terrain areas of the Upper Arkansas River Valley. \/Hodanish Today, an upper level low over southern AZ, is expected to track eastward, becoming an open wave tonight and tracking acrs NM. At 3 am snow was ongoing over the mtns and along the I-25 corridor, with a few warmer pockets of rain or a mix of rain and snow. At this time, with decreasing chance for precip many areas this afternoon, that temps will probably be in the 40s to lower 50s acrs the sern plains, with the warmest readings mainly along the lower Arkansas River Valley. The high valleys will likely see highs in the 40s this afternoon.
130 PM EDT Tue Mar 27 2018 Gusty easterly flow behind a backdoor cold front today. /issued 1042 AM EDT Tue Mar 27 2018/ A backdoor cold front has pushed across the area into the Gulf of Mexico.
Patchy to areas of fog and freezing fog is forecast to develop overnight especially along the primary river basins.
Upper level ridge over the eastern Pacific has begun to amplify in response to a downstream trough dropping into the Desert Southwest.
Issued by National Weather Service TUCSON AZ 223 PM MST Tue Mar 27 2018 A low pressure system will exit the region today with windy conditions across southeast California and lingering chances of light showers across the higher terrain in far eastern Arizona. High pressure will then build in from the west resulting in a strong warming trend.
301 PM CDT Tue Mar 27 2018 Moisture channel satellite still shows upper low spinning in southern AZ. Cold front by 20z had made it to east central IL, and will continue to slowly move to south overnight. Weak high pressure will follow the front, causing light winds and so some patchy dense fog possible over region, with the main area northwest of IL river. Dry period will be short lived though, as the upper trough remains over southwest US.
Rain chances will diminish a bit over the northern counties tomorrow, but rain will quickly fill back in by Wednesday night as an upper low then enters the area.
200 PM MDT Tue Mar 27 2018 A broad upper trough covers much of the CONUS, with northwest flow over the northern plains. An upper wave and its associated cold front will cross the region tonight.
A northern stream trough is moving east across the northern tier states with a downstream ridge building up the East Coast. A southern stream trough continues to spin over the Four Corners area this afternoon with a cold front is located to our north, extending across southeast MO into northeast TX. The warm conveyor belt downstream of the Four Corners trough will shift eastward over the Mid-South tomorrow with precipitable water increasing to around 1. 75" along and ahead of the aforementioned cold front.
159 PM CDT Tue Mar 27 2018 The upper trough moving in from the west has formed a closed low over AZ this morning. This low will slowly move east passing across the region Wednesday with high pressure building in behind it. This low will bring a good chance of rain to the area. Not much of a dryline today as surface moisture pushed up against the higher elevations.
Aloft, a split-flow pattern is in place, with a northern stream short wave trough lifting northeast across the Great Lakes region and a cutoff low located across the Desert Southwest, with deeper southwest flow streaming in across the Mississippi Valley. Eastern Kentucky remains firmly in the warm sector, with current temperatures ranging from the low to upper 60s, and plenty of holes noted on the visible satellite imagery upstream.
This front will continue to drift slowly Southeast and become nearly stationary and remain a focus for shower and thunderstorm development across the Four State Region as the upper flow remains Southwest between the closed upper low over Arizona/New Mexico and North Mexico and the upper ridge of high pressure from the Central Gulf of Mexico into the Northeast States. A cold front will move into the area in its wake providing a dry period into the start of the weekend.
Upper level ridging was situated west of the Appalachians this afternoon. Despite the cloud cover, tomorrow should be warmer than today, with many valley locations expected to reach the 70s.
At the surface, a ridge axis continues to progress into the CWA. The low stratus and mid- level cloud cover has greatly reduced insulation, yielding cooler temperatures in the 40s to near 50 this afternoon. As cloud cover decreases across northern KS and the ridge axis sets up overhead, the potential for fog will increase. Solutions suggest the low will begin to shear out and eject into the Plains as an open wave.
Temperatures over eastern ND/NW MN have reached the low to mid 40s at some locations, whit all of our CWA above freezing. WAA is shown to remain in place through most of the night with wetbulb profiles remaining above freezing through most of the period of peak lift/moisture advection. Increasing low level winds and cloud cover will also help keep above freezing surface temperatures in place. Best chance for the surface layer to drop to freezing will be in our northwest where stronger CAA spreads into the region first. I still can't rule out a rain/snow mix or pockets of freezing rain/sleet, but unless a surface is at or below freezing or lower impacts may be low.
Kept dewpoints a touch higher than guidance, given the higher dewpoints in the 30s across the area this afternoon already being higher than most models forecast. With temperatures dropping below freezing tonight, there will be a chance of freezing fog in some areas, which could cause some slick spots to develop on roadways.
259 PM MDT Tue Mar 27 2018 Warmer temperatures are expected across the area ahead of a cold front and scattered light rain showers moving into the region Wednesday afternoon. The upper trough extending across the region today sweeps east of the region overnight with stronger northwest flow aloft moving across the Rockies and central high plains on Wednesday. Highs in advance of the cold front should be in mid 50s to lower 60s. The cold front will begin moving into the northern sections of the forecast area around mid day and should be through the majority of the forecast area by 00Z Wednesday evening. Northwest winds are also expected to increase through the afternoon following the passage of the cold front.
309 PM CDT Tue Mar 27 2018 For tonight, dry conditions will continue as high pressure slowly slides southeastward.
Due to this afternoon temps are likely to be 4-6 degrees cooler than forecast. The middle level drying will end the light rain this morning, with the low level drying eventually scattering out the stratus this afternoon.
306 PM CDT Tue Mar 27 2018 Deep upper low is currently situated across the Desert Southwest with southwest flow aloft remaining over the southern Plains. At the surface, cold front stretches from southeast MO into west TX. Main story for Wed into Thu will be for the main upper trough to finally swing across the Plains as some northern stream energy phases with the main impulse currently over the southwest CONUS. Upper trough will finally swing east of the Plains Thu into Thu night, taking the better rainfall chances with it. GFS and ECMWF have come into much better agreement with the timing of a strong cold front Sat-Sun.
216 PM EDT Tue Mar 27 2018 High pressure ridging over the area will continue today with northeasterly surface flow gradually becoming southeasterly.
Forecast soundings indicate the clearing and thinning of the clouds should be temporary given the low level moisture feed that will take place through tonight into early Wednesday.
1256 PM CDT Tue Mar 27 2018 At 3 AM, a cold front extended from the western tip of Upper Michigan to Dubuque Iowa. For tonight, a ridge of high pressure will build across the region. On Wednesday, southwest and west winds ahead of an approaching cold front will warm 925 mb temperatures into the 4 to 9C range. Meanwhile, the remainder of the area will see high temperatures ranging from the lower 50s to lower 60s. On Wednesday evening, a weakening cold front will move southeast through the area.
A cold front extends from northwest AR into central TX. Meanwhile, the latest UA analysis and WV imagery shows a large low spinning over the southwestern US, with ridging over the Gulf of Mexico into the southeastern states. Meanwhile, southerly flow in the lower levels transitioning southwesterly aloft will continue to bring increasing moisture over the region.
Aviation weather conditions should deteriorate later tonight into Wednesday with the approaching trough in the jet from the west and frontal boundary approaching from the north.
As an upper trough continues to move slowly over the Southern Rockies and into the Plains tomorrow afternoon, the best rain chances will shift to our eastern counties. The other factor in pay tonight into tomorrow is another cold front.
Weak cold front across WA and the north Pacific will move south tonight spreading scattered light rain and snow showers across our northern areas and increasing clouds in the south. Winds will diminish Wednesday evening, and Wednesday night will be slightly cooler than tonight.
High pressure will build over the region over the next few days with a warming and drying trend. Water vapor satellite imagery shows the upper low shifted over the Arizona/New Mexico border with amplified ridging over the eastern Pacific. Temperatures are running from 3-9 degrees warmer from this time yesterday across most of the district.
The high pressure begins to to slide east tonight as the wedge finally begins to break down. As this system will be a strong deep- layer ridge centered near the Bahamas on Wednesday, the best moisture and lift will be to our northwest.
202 PM EDT Tue Mar 27 2018 High pressure ridging over the area will continue today with northeasterly surface flow gradually becoming southeasterly.
A low pressure system pushing into New Mexico tonight will allow for a lingering chance for rain and snow showers into the evening. Lingering showers across S Apache, S Navajo, and N Gila counties will persist into the evening as low pressure pushes eastward into New Mexico.
336 PM EDT Tue Mar 27 2018 (Currently) Surface analysis reveals a low pressure system over northern Michigan with a trailing cold front across the southern Plains. Lift and convergence ahead of the cold front has supported widespread showers and isolated storms. (Tonight) The cold front pushes slightly southward overnight.
Cooler behind the front Weds with rain and snow spreading across much of the CWA during the morning. Pcpn will continue into the evening over mainly se Wy where some light accumulation is then expected to spread into the higher plains just east of the mtns.
Temperatures tonight will fall into the lower to mid 50s across the Nature Coast, and mid to upper 50s central and south except lower 60s along the immediate coast. High pressure will be in place across the area from just offshore of the east FL coast.
335 AM EDT Tue Oct 17 2017 A broad area of high pressure builds in from the west today, and will remain in control through the weekend. At the surface, high pressure to the west gradually builds to the south of the region. Good radiational cooling conditions likely tonight across interior with a favorable waa aloft setup for decoupling; allowing temps to fall into the lower to mid 30s once again. Sunny skies and a gradual moderation in temps begins on Wednesday as SW return flow develops around the high to the south. Ridging both aloft and at the surface prevails through much of the period.
Models show a ridge centered over Southern CA/AZ/Sonora Mexico. Temps will be warmer today as the flow aloft transition to zonal and lee sfc troffing develops.
The 500mb pattern shows a ridge of high pressure over the southwestern U. The other feature to note is the trough beginning to slide into western Canada, that will impact our weather midweek. Low pressure over British Columbia early this morning will track east into central Saskatchewan by the end of the day today, deepening as it slides east. A cold front will extend south of this feature and cross our forecast area Wednesday morning, bringing in breezy northwest winds and knocking down high temperatures about 10 degrees. High pressure will quickly build in behind the cold front during the day Wednesday, with the ridge overhead Wednesday evening.
117 AM MDT Tue Oct 17 2017 Latest upper air analysis shows a ridge centered over Baja California. Westerly flow over the CONUS contains some small short wave troughs. Only change will be the shift of the warmer temperatures from the west to the east for today.
These clouds are associated with a short wave trough located over northeast Nebraska and northwest Iowa. Further to the north, water vapor imagery showed a short wave trough over northern Wisconsin.
A potent cold front will sweep from northwest to southeast tonight, prompting wind concerns for northern North Dakota, followed by more fire weather concerns Wednesday. A dry, but very strong cold front in terms of an abrupt wind increase and a temperature change, will plow through northwest North Dakota near midnight, and quickly sweep through central ND overnight. Much cooler Wednesday with highs in the mid 50s north to lower 60s south.
401 AM EDT Tue Oct 17 2017 Cool Canadian high pressure builds into the Mid Atlantic today, and then remains over the region and gradually moderates through the remainder of the week. The sky is clear early this morning aside from a narrow streamer over the lower Bay. Temperatures range widely early this morning with most inland locations in the low/mid 40s (locally upper 30s over the Piedmont) to 55-60F for coastal SE VA/NE NC where a 10-15 mph NNE wind persists. The high builds into the region today bringing sunny and pleasant conditions. The high remains over the region tonight resulting in ideal radiational cooling conditions with clear, cool, and dry conditions are expected.
415 AM EDT Tue Oct 17 2017 High pressure will result in gradually warming weather and dry conditions through the week. High pressure will maintain nearly clear skies and light wind today. High pressure will remain firmly entrenched over the area through the rest of the week, ensuring a dry forecast.
357 AM CDT Tue Oct 17 2017 A modest warming trend will carry through the remainder of this week ahead of our next major cold front set to arrive later on this weekend. In the meantime, expect the upper longwave pattern to become more progressive as the trough which brought our most recent cold front exits the eastern seaboard later today. Upper ridging will become more amplified across the mid-section of the country by mid to late week with the aforementioned warming trend getting a boost. This will push high temperatures back near 80 degrees in our northern zones and ranging through the lower 80s farther south by Wednesday.
A quiet night across the southern Tennessee Valley, with high pressure at the surface building in. Good radiational cooling has taken place with the loss of heating -- and temperatures have quickly dipped from the mid/upper 60s into the lower 50s as of 0230z. A strong inversion in place will mean that the warmest locations may be on some of the ridgetops of Northeast Alabama and areas next to rivers/lakes (due to the warmer water temperatures). As a strong area of high pressure remains over the eastern CONUS, highs should climb into the lower to mid 70s by Wednesday (as more southeasterly flow begins to develop over the area). A high degree of uncertainty remains with newest model guidance concerning an approaching frontal boundary and possible cut-off low situation over the southeastern CONUS or Gulf of Mexico (depending on the model).
315 AM EDT Tue Oct 17 2017 High pressure will remain in place over New York and Pennsylvania for the remainder of the week with a gradual warming trend and dry weather expected. The cold temperatures this morning are the main focus in the near term with high pressure dominating the region through the middle of the week and beyond. Temperatures today will be roughly 5 to 15 deg warmer than yesterday.
Farther to the west, light southeast breezes and increasing high clouds have kept temperatures in the lower to middle 40s overnight. Lows will range from the lower 40s over south- central Missouri to the upper 40s along the I-49 corridor.
125 AM EDT Tue Oct 17 2017 High pressure will build over the region tonight leading to a cold and frosty Tuesday morning. This high pressure will remain in place over New York and Pennsylvania for the remainder of the week with a moderating temperature trend.