Aikyam-Lab/Synoptic-Bench huggingface dataset:
Diminishing winds in the works as well with the more slack gradient with surface ridging. Medium to High 500 millibar ridge in place at the outset with some flattening during the day as some energy shifts east from the northern Plains. Low level traj will keep the eastern/lake areas cooler with a potential boost into the 50s in the western CWA.
157 PM EDT Sat Mar 18 2017 Weak Cold Front moving through the area now with showers ahead of it.
353 PM CDT Sat Mar 18 2017 Well the low decks are now letting in some decent sunshine with a few more likely "warmer than forecast" readings to occur late this afternoon. The real cooler dew points are spreading right down the lower elevations of the MS river valley and may still plug into the Ouachita valley of El Dorado and Monroe this evening, but the weak front will bounce out overnight with low level winds to return from the SW bring some more clouds and or fog. Little change to write home about just yet as the warmer than average pattern lingers all week.
335 PM EDT Sat Mar 18 2017 High pressure will move east of the region overnight. low pressure will track well south of the region Sunday and Sunday night.
Despite the boundary sinking into the area, lower dewpoints and cooler air will remain east and northeast of the area so overnight lows tonight are expected to be near or even a little warmer than last night, ranging from around 60 acrs central LA to the lower 60s acrs lower southeast TX.
and the weak cold front is washing through the eastern counties now. Breezy winds now will settle somewhat tonight and settle further on Sunday as high pressure build into the region.
An upper low and trough will drop southeast across the upper Midwest and Great Lakes tonight. Trailing portion of associated cold front will move south to near our northwestern border counties tonight before stalling overnight. This boundary is expected to lift back to the north to the Red River as a warm front on Saturday. An upper level ridge will shift east over the Rockies and into the Plains and Texas tonight and Saturday.
557 AM CDT Sat Mar 18 2017 Updated for 12Z aviation discussion 12Z TAF discussion: A cold front pushing south through the area will be accompanied by a broken line of showers and a few tsra, MVFR/IFR ceilings, and a wind shift from SW to NW as we go through Today. Today and tonight: Latest satellite imagery showed an upper trough over the Great Lakes region dragging a cold front toward the region under northwest flow aloft. The cold front and isolated showers will exit the region by this evening. Lows will range from the lower 40s northeast to the lower 50s southwest.
A broad upper level trough currently resides over the eastern CONUS, and will become more amplified throughout the day as it digs into the Southeast. At the surface under the base of the upper trough, a broad area of low pressure will move southeastward through the Mid- Atlantic region, with a trailing cold front moving southward through northern AL and GA during the afternoon.
335 AM EDT Sat Mar 18 2017 Mixed precipitation is expected today and tonight as low pressure crosses the region. Building high pressure should return dry weather later Sunday. Light rain, freezing rain and drizzle is expected to continue this morning with lift resulting from warm advection ahead of an approaching low. These are expected to rise mainly above freezing by sunrise. Rain showers are expected to develop with the low, and these could mix with and change to snow showers later in the day under cold advection. Around an inch of snow is expected, with 1-2 inches toward the higher terrain of WV/MD/PA. The ridges could also see a period of freezing drizzle Sunday morning as moisture in the snow growth region dries out, but low level moisture lingers. Clouds should decrease late Sunday as high pressure builds in.
307 AM CDT Sat Mar 18 2017 In the near/immediate term, we have a cold front bearing down on the FA, and ahead of it, dense fog with vsbys restricted to 1/4 mile or less in many locations, particularly east of the Mississippi river. Already expanded the inherited Fog Advisory westward to the river, and at press release, will have to make a final adjustment for counties behind and still in front of the cold front/passage. After that, High pressure moves in/overhead and provides a dry/seasonally nice weekend. With the High shifting east Sunday, return flow southerlies warm sector us Sunday night.
623 AM EDT Sat Mar 18 2017 Cold front crosses today. Upper disturbance crosses today into tonight as low pressure intensifies off the east coast.
JHM Upper level ridge axis has shifted east into the Great Basin as an atmospheric river approaches the West Coast. These high temperatures are around 10 degrees warmer than normal for this time of year.
325 AM EDT Sat Mar 18 2017 An amplified trough will drop down out of the Great Lakes region helping to push a front draped to the north through the region today. High pressure quickly builds into the area later this afternoon through the remainder of the period. Lows drop into the low/mid 30s across the higher elevations to the low 40s in central GA.
High pressure situated across the area will shift south as a cold front approaches.
A strong ridge of high pressure will spread the warmest temperatures of the season across eastern Montana today with pre- frontal compressional heating on display.
617 AM EDT Sat Mar 18 2017 Cold front continues moving into the TN Valley with light rain entering the forecast area from the north.
Sunday will be mainly dry with high pressure. A ridge of high pressure and clear skies is slowly moving east this afternoon. Strong March sun warming the low levels despite the snow cover. The highest amounts will be across the higher elevations of the far southeast including Luzerne, Pike and Sullivan. Aloft a closed low will also move southeast through PA Saturday night and Sunday. Sunday under the upper level trough but not very cold aloft with 850mb temps of about -5c. This is below normal but warmer than the past week. Sunday night high pressure and light winds will allow temperatures to fall to the lower 20s and upper teens.
1123 PM MDT Fri Mar 17 2017 Latest upper air analysis continues to show the ridge over the Great Basin. A short wave trough was dropping south over the Great Lakes, serving to turn the flow more to the northwest. Water vapor showed very little moisture under the ridge. Most of the moisture was rounding the ridge over the Pacific Northwest and Northern Plains where the sky cover is located. However East Central CO will be west of the higher dew points and in the warmer air.
136 AM MDT Sat Mar 18 2017 Latest upper air analysis continues to show the ridge over the Great Basin. A short wave trough was dropping south over the Great Lakes, serving to turn the flow more to the northwest. Water vapor showed very little moisture under the ridge. Most of the moisture was rounding the ridge over the Pacific Northwest and Northern Plains where the sky cover is located. However East Central CO will be west of the higher dew points and in the warmer air.
435 AM EDT Sat Mar 18 2017 Cold front continues moving into the TN Valley with light rain entering the forecast area from the north.
310 AM EDT Sat Mar 18 2017 Cold front crosses today. Upper disturbance crosses today into tonight as low pressure intensifies off the east coast.
413 AM CDT Sat Mar 18 2017 Cyclonic flow/caa continues behind the cold front. but we should see ample sunshine along with lighter winds as the high pressure ridge moves through. perhaps a degree cooler.
145 AM EDT Sat Mar 18 2017 A warm front will move north of the forecast area this evening. A low pressure system will push a cold front through the region overnight. High pressure will briefly build into the region on Sunday. An area of moderately intense snow has developed along the warm front this afternoon. The warmer air has been much slower than predicted moving into the forecast area. Snow rates with the warm frontal band are moderate and a quick inch or two of accumulation is possible as the band moves to the east this evening. High pressure will begin to build over the region on Sunday.
An Atlantic area of high pressure will continue across Florida and the Gulf of Mexico today. A weak and dry cold front will move south across South Florida and the Florida Keys late Sunday with winds increasing behind the front. Thereafter, ridging will again build across the Florida Peninsula.
649 AM EDT Sat Mar 18 2017 Low pressure over the Lower Great Lakes will transfer to the Mid-Atlantic Coast later today.
640 AM EDT Sat Mar 18 2017 Areas of dense fog accompanied by some light drizzle will end by daybreak as a cold front moves east. High pressure will move back into the area Sunday resulting in dry weather with near normal temperatures.
505 AM EDT Sat Mar 18 2017 Low pressure over the Lower Great Lakes will transfer to the Mid-Atlantic Coast later today.
405 AM CDT Sat Mar 18 2017 Water vapor imagery shows a trough of low pressure moving across the Great Lakes this morning. with the tail end of the associated cold front slowly sagging south across Central Arkansas. This weak cold front will continue to move south today.
332 AM CDT Sat Mar 18 2017 High pressure will settle into the region today in behind the cold front that has descended into the Gulf. Temperatures associated with this Pacific air mass will be a bit cooler but still above normal for mid March. however there will be periodic rain chances as waves on the northern periphery of the flow drag cold fronts into the Ozarks. Moisture will not be overly significant in this pattern until a deep trough forms and crosses the Central Plains late in the week.
Today and tonight: Latest satellite imagery showed an upper trough over the Great Lakes region dragging a cold front toward the region under northwest flow aloft. The cold front and isolated showers will exit the region by this evening. Lows will range from the lower 40s northeast to the lower 50s southwest.
140 AM EDT Sat Mar 18 2017 Areas of fog and some light drizzle is expected through the evening ahead of a cold front that will move through late tonight. High pressure will move back into the area Sunday resulting in dry weather with near normal temperatures.
Northwest flow on the backside will aid in mixing before cooler mid level temperatures set in. Additionally, NAM BUFKIT profiles indicate very dry air in the wake of the trough passage, particularly at 850mb where dewpoints reside in the -5C and -9C range.
353 AM EDT Sat Mar 18 2017 Areas of dense fog accompanied by some light drizzle will end by daybreak as a cold front moves east. High pressure will move back into the area Sunday resulting in dry weather with near normal temperatures.
348 AM MDT Sat Mar 18 2017 Broad high pressure will remain over the area today and tonight. The 500 mb ridgeline will slide east of the area by sunset today with SW flow aloft spreading over the area ahead of a strong Pacific storm system.
125 AM EDT Sat Mar 18 2017 A ridge of high pressure will build into the region with clearing skies and cool temperatures expected today and tonight.
320 AM CDT Sat Mar 18 2017 Pleasant and mild day expected throughout the region with upper level ridging building over the high Plains. With warmer air building aloft, the breezy winds will create mixy conditions. Strong warming still expected on Sunday, ahead of and immediately preceding cold front pushing into the Lower James River Valley by late afternoon. Begin to see cooling aloft behind the cold front by 21z, but with 850mb readings still in the teens, mid to upper depending on model preference.
Lows will be near guidance, but will likely be steady or slowly rising late over the higher terrain. Saturday, upper and thermal ridge peak over the CWA. Rather warm temperatures expected Saturday night with only partial decoupling over the higher terrain. It will push a cold front through the CWA.
Stacked but progressive low pressure is working its way from northern Minnesota into the Great Lakes, currently trailing a cold front through the mid-Mississippi Valley. Showers and a few thunderstorms associated with a pre-frontal trof have been moving through the Ohio Valley, and are now laying out east to west across south-central Kentucky. The closed low will make its way slowly from the thumb of Lower Michigan on Sat morning to just off the Delmarva by Sunday morning, with cyclonically curved mid-level flow lingering over the Ohio Valley at least through the day on Saturday. Clearing skies and diminishing winds are expected Sat night, with Sunday morning temps near freezing across the board.
200 AM EDT Sat Mar 18 2017 Cold front crosses today. Upper disturbance crosses today into tonight as low pressure intensifies off the east coast.
However, the airmass will not be as cold as the past couple of nights with overnight lows generally ranging from the lower 40s across the eastern part of the area to upper 40s across the western part of the area to the low to mid 50s along the panhandle coast. An upper level low will traverse the Great Lakes region Saturday, with the associated trailing cold front moving through the region during the daytime. Instead, expect a slight increase in mid to high level clouds, with slightly cooler temperatures behind the front for Sunday.
Snow accums on Sat will be light, maybe reaching 1 inch but that would be on the high end. In the extended, GFS and ECMWF show a cold 500 mb trough over south central Canada 12z Tue with manual progs showing a sfc cold front moving through the area. The core of the cold air moves into Quebec on Wed as a ridge moves into the plains. This ridge then moves into the upper Great Lakes 12z Thu. This trough moves east into the Mississippi River Valley 12z Sat. Fri morning there looks to be a nose of warm air that moves through and with temperatures below freezing early, cannot rule out mixed pcpn of some freezing rain, sleet, snow and rain and have that in there for a few hours early Fri morning. Otherwise, no gales or heavy freezing spray is expected.
409 AM EDT Sat Mar 18 2017 Through this weekend: Latest surface analysis showed a cold front draped southward from Chicago to Texas.
/issued 405 AM CDT Sat Mar 18 2017/ Water vapor imagery shows a trough of low pressure moving across the Great Lakes this morning. with the tail end of the associated cold front slowly sagging south across Central Arkansas. This weak cold front will continue to move south today.
The surface pressure gradient has also relaxed due to the proximity of the high, and southeast winds today will be less breezy. Meanwhile, temps will be running a few to several degrees above normal for mid March as highs today top out in the upper 70s to lower 80s along the coast to the lower 90s across the Western Ranchlands. The RGV can expect a similar set up for Sunday although highs may be a degree or two warmer as high pressure continues over Deep South Texas.
335 AM CDT Sat Mar 18 2017 High pressure will settle into the region today in behind the cold front that has descended into the Gulf. Temperatures associated with this Pacific air mass will be a bit cooler but still above normal for mid March. however there will be periodic rain chances as waves on the northern periphery of the flow drag cold fronts into the Ozarks. Moisture will not be overly significant in this pattern until a deep trough forms and crosses the Central Plains late in the week.
403 AM MDT Sat Mar 18 2017 An upper level ridge will be over the area today which will keep the weather dry and very warm. Tonight the upper ridge will flatten over the area as a disturbance moves through the flow to the north. The weather will remain dry and overnight lows should be warmer than average.
A weak cold front was making slow southward progress through southern OK this morning.
311 AM CDT Sat Mar 18 2017 Cold front currently located just north of I-40 this morning with a few lingering showers over west-central Arkansas. Warm front will begin to quickly lift back north tonight with the potential for a few elevated showers/thunderstorms across far northeast Oklahoma/northwest Arkansas late tonight into Sunday morning.
155 AM EDT Sat Mar 18 2017 High pressure will prevail through tonight.
The trough will also push a cold front into the area. Temps will be mild today, 10 to 15 degrees above normal, but Sunday will find us about 5 degrees cooler. Lows Sunday morning will be in the mid 40s in the lower elevations and 30s in the mountains.
Low level moisture preceding the front and falling midlevel temps under the closed upper low will help regenerate showers and possibly an isolated thunderstorm in the early afternoon, mainly in northern sections. SW VA and NE TN remain under the influence of the closed low through tonight, which will keep isolated showers going.
423 AM CDT Sat Mar 18 2017 High pressure will slide east from the Northern Plains into the Upper Midwest today, slowly increasing the surface pressure gradient across western Kansas by late afternoon and this evening.
246 AM CDT Sat Mar 18 2017 Wx map shows a cold front across OK/AR/TN this morning generating convection up there.
358 AM CDT Sat Mar 18 2017 A persistent upper ridge will continue to dominate the weather across the region, as above normal temperatures look to continue through the next 7 days.
Temperatures will be in the low 50s interior and west while in the low 60s along the east coast metro area. High pressure remains in control tomorrow providing another pleasant day across South Florida. Lingering moisture in the periphery of the high will move over Southeast Florida providing a few isolated showers tonight into Saturday.
A cold front associated with the weather system will pass through the Northern Rockies late this afternoon into this evening bringing wind gust to 40 mph and perhaps a few rumbles of thunder.
559 AM CDT Sat Mar 18 2017 High pressure will settle into the region today in behind the cold front that has descended into the Gulf. Temperatures associated with this Pacific air mass will be a bit cooler but still above normal for mid March. however there will be periodic rain chances as waves on the northern periphery of the flow drag cold fronts into the Ozarks. Moisture will not be overly significant in this pattern until a deep trough forms and crosses the Central Plains late in the week. An approaching warm front may then bring scattered showers and thunderstorms to the area late tonight.
Windy conditions will develop Saturday afternoon and evening as a strong cold front passes.
A weak low pressure system is expected to move into central California this afternoon and evening with light showers possible near Yosemite.
Cold front just n of MAF has mostly stalled, but looks to briefly turn wind east around 12Z at MAF.
A cold front is expected to cross the area during the late morning hours, which will raise vis and cigs back to predominantly VFR, with clouds becoming scattered in the afternoon. An upper level trough dropping across WV will bring an increase in clouds at VFR levels after 00Z at TRI and TYS.
329 AM MDT Sat Mar 18 2017 Hot weather will continue through the weekend, with temperatures reaching into the upper 80s across the lowlands today, and possibly reaching 90 on Sunday.
/issued 231 PM CDT TUE SEP 20 2016/ Unseasonably warm weather will continue for the next few days, with each day being only slightly cooler than the last. An deep upper level trough moves in this weekend pulling in some tropical moisture. This will bring cooler weather and increased rain chances.
549 PM MDT Tue Sep 20 2016 Water vapor shows deep upper trof working onshore the pac nw with broad wsw flow extending through the nrn plains. broad low pressure covers the cntrl plains/cntrl rockies region with nearly stationary frontal boundary extending from ern Wy through nrn NEB. Chances for pcpn will begin to increase as upper low digs into the Great Basin and flow aloft turns more swly.
A trough of low pressure aloft is currently digging through Washington State and points offshore while tropical storm Paine is spinning just offshore the Baja California peninsula. The trajectories of these two weather systems will eventually combine into one very large low pressure storm system overtaking much of the western US. Wednesday night as the large upper-level trough axis finally pushes inland near the Oregon coastline, and our upper-level flow locally turns more from the southwest, the model precipitation output indicates more organized storms and more widespread rainfall amounts can be expected.
933 PM EDT Tue Sep 20 2016 High pressure will remain over the Ohio Valley through the rest of the work week, allowing dry weather to continue.
Upper ridge building over the region will keep skies mostly clr overnight allowing temps to fall into the lower 60s. (Issued 552 PM CDT Tue Sep 20 2016) For 00Z TAFs: The Tn valley is between an upper low along the SC coast and an upper ridge over portions of the srn plains and midwest. (Issued 552 PM CDT Tue Sep 20 2016) (Issued 232 PM CDT Tue Sep 20 2016) A large ridge of high pressure across the southeast U.
/issued 325 PM EDT Tue Sep 20 2016/ A cut off low pressure centered over the Carolinas lingers over the region through mid week and gradually weakens by the end of the week. The low may help in bringing slightly cooler temps aloft over S Fl, which could enhance the overall instability and thunderstorm activity today through mid week. High pressure will begin to build across the Atlantic while the low continues to weaken veering winds to the southeast.
756 PM EDT Tue Sep 20 2016 We will remain on the dry side of a large upper ridge this week.
At the surface, a low pressure system forming over the Great Basin will keep north/northeast surface winds across the forecast area through late Wednesday afternoon.
Upper ridge has settled over the southern CONUS this afternoon while westerlies centered across the northern plains. Low level Gulf moisture has lifted as far north as eastern Nebraska with dewpoints averaging in the lower to middle 70s in northeast KS. Combined with highs in the low 90s this afternoon, heat indices in the 100 to 104 degrees are expected for the next few hours. Upper level moisture streaming across the northern periphary of the ridge will increase high clouds this evening with overall quiet and mild conditions.
608 PM CDT Tue Sep 20 2016 An upper level ridge along with a hot and humid air mass is currently over the region. Temperatures this afternoon are currently in the upper 80s to the lower 90s. Lows tonight will cool into the low to middle 60s across south central Missouri to around the 70 degree mark across southeastern Kansas and far southwestern Missouri. Lows in the lower 60s combined with temperatures falling into the lower to middle 60s will result in the potential for some patchy fog tonight. The upper level ridge will remain over the region through the end of the week resulting in the unseasonably hot and humid conditions continuing.
723 PM EDT TUE SEP 20 2016 Dry weather is expected with temperatures running much above normal through the work week as upper ridging remains overhead.
Upper ridging is expected to remain over the southern Plains tonight through Wed. Through Fri night confidence is high that the better rain chances will stay out over the high Plains. While both the GFS and ECMWF continue to separate the trough into northern and southern stream impulses, the ECMWF has backed off retrograding the southern stream disturbance while the GFS still does.
641 PM CDT TUE SEP 20 2016 VFR conditions to prevail through the terminal forecast period due to upper-level ridging aloft. Stg ridge ovhd will combine with drier low lvls to produce mostly clear skies next few days. Although the ridge intensity may gradually weaken later in the week, its ovhd position will remain unchanged. Meanwhile, a deep longwave trough with associated upper low over AZ will likely separate later in the week, with the trof movg east across upper midwest, leaving the upper low spinning over the sw, with upper lvl winds approaching 100 kts on both the lee side and the back side of the low.