Aikyam-Lab/Synoptic-Bench huggingface dataset:
513 AM MDT Fri Nov 4 2016 Latest upper air analysis shows the closed low near Baja California and the upper level ridge over the Great Basin and Plains to have moved little in the last day. Lows may be a few degrees warmer due to some cloud cover moving overhead as the upper level low approaches from the southwest. Regarding the track of the upper level low, continue to have doubts about how quickly the closed low will merge back into the upper level flow and eventually over the Tri-State Area. Models now have the closed low slightly further south over the Four Corners Area by Saturday morning compared to the model runs from this time yesterday.
In the low levels of the atmosphere, a cold front will move over north Florida this afternoon. In the mid levels of the atmosphere, a trough of low pressure will pass southward through the Florida Keys today. In the upper levels of the atmosphere, a ridge of high pressure will amplify over the western Gulf of Mexico this afternoon.
Gradient flow of 5+ knots may inhibit this process some, but trajectory over Lake Michigan will help infuse additional low level moisture into this WSW flow around high pressure to the south. Shallow fog possible again late tonight as moisture (enhanced a bit by Lake Michigan) advects in from west around high pressure centered over the Ohio Valley. Se Mi will however remain in close proximity to the low level thermal trough across the ern Great Lakes. A result will be a strengthening of the low level w-nw low level wind field across Lower Mi.
1002 AM EDT Fri Nov 4 2016 Low pressure will exit east of the maritimes today.
1222 PM EDT Fri Nov 4 2016 Strong Canadian high pressure will build into the area today and tonight, settling over the region much of the upcoming week. Have removed pops from the forecast for today as all significant precip has moved offshore with the cold front.
High pressure, clear skies, and dry weather will remain through today. Chattanooga Airport, TN 74 48 72 44 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 71 43 69 41 / 0 0 0 0 Oak Ridge, TN 72 44 69 41 / 0 0 0 0 Tri Cities Airport, TN 66 35 66 38 / 0 0 0 0.
A cold front was moving through central Alabama early this morning. But, this rain near the cold front will continue falling apart and be gone by sunrise. Models are in good agreement that the upper ridge builds back overhead through the weekend. Although the highs drop off, we will still remain well above normal in the 70s. The GFS seemed to have a better handle the eventual development of a closed low west of the area. At this time, leaned toward the ECMWF due to the persistent ridge and antecedent dry conditions. 41 A cold front was currently moved southward across central Alabama.
427 AM PDT Fri Nov 4 2016 Dry conditions will prevail for one more day, as high pressure dominates our weather. An approaching cold front will bring rain to the region for Saturday, with some of the rainfall moderate to heavy in intensity at times.
1210 PM EDT Fri Nov 4 2016 High pressure will remain over the Ohio Valley through Saturday.
609 AM CDT Fri Nov 4 2016 Elongated area of high pressure will result in continued tranquil conditions across the area. As center of the high refocuses in the western Great Lakes region weak return flow will develop across the region. Actual highs continue to be warmer than guidance, and have raised forecast highs in most locations. Have blended in some MOS values to get cooler radiational lows.
902 AM EDT Fri Nov 4 2016 Strong Canadian high pressure will build into the area today and tonight, settling over the region much of the upcoming week. Looks like the cold front has moved offshore given rising pressures and wind shifts. Previous discussion follows: A cold front will drop SE across SE NC and NE SC through the morning hours, bringing a chance of a shower over inland SE NC around daybreak, to the SC coast into middle morning.
1152 AM CDT Fri Nov 4 2016 Weak backdoor cold front hanging up in ne TX, with isold shra expected to redevelop this aftn at mainly the KLFK and KTYR terminals.
1044 AM EDT Fri Nov 4 2016 High pressure and notably cooler air will gradually build across our region today. While this large area of high pressure will generally supply us with fair weather for the weekend, a shower cannot be ruled out east of Lake Ontario. High pressure building in from the central Great Lakes towards the lower Great Lakes will bring dry weather today. A much cooler airmass will build into the region today with highs in the mid to upper 40s in most areas, except a few degrees cooler across higher terrain. Patchy cloud cover and some wind should limit radiational cooling tonight, with lows ranging from the lower 40s across the lake plains to mid 30s across the interior.
Northerly winds and cloud cover will also keep temperatures a little cooler than previously anticipated and we have adjusted high temperatures for today. Elsewhere across South Central Texas, mainly ISOLD SHRA/TSRA are expected and have left mention out of KAUS/KSAT/KSSF TAFs due to low PROBs from weak ridging. Upper air analysis last evening showed a ridge extending from Texas to the northern plains and a cutoff low centered over northwestern Mexico. At the surface, a cold front extended from Houston to Floresville to Quemado. The upper level low will begin to move to the northeast today and ride up the western side of the ridge.
938 AM MDT Fri Nov 4 2016 Broad upper level ridge of high pressure to maintain dry and mild conditions across the forecast area today. Broad upper level ridge over central portion of North America will remain in place through the forecast period. High clouds moving through the upper ridge will continue to support a Chinook Arch along the Northern Rocky Mountain Front and Southern Alberta but VFR conditions and mostly clear skies prevail for most of the forecast area.
1021 mb high pressure over western KY and southern IN and ridging northward over IN has shifted east of IL early this morning with light SSE winds over CWA. Cool temps were in the upper 30s and lower 40s, coolest in eastern IL where winds lighter closer to high pressure ridge over IN. High pressure ridge to drift east over WV by sunset today while upper level ridge over Great Plains shifts eastward into the MS river valley. Still a tight pressure gradient over IL to keep breezy southerly winds and a milder night tonight with lows in the low to mid 50s, mildest readings from I-55 west. Dry and breezy southerly winds gusting 25-35 mph should continue Sunday with even warmer highs in the mid 70s, even some upper 70s over portions of sw CWA.
Cigs may begin to lower towards the end of the cycle, more than likely after 06Z, as the low-level moisture continues to increase.
An inverted sfc trof develops by late morning to add additional lift to unstable atmosphere. ahead of the main trof axis.
303 AM PDT Sat Apr 8 2017 A low pressure system moving through California will bring mostly light precipitation along and west of the mountains this morning with strong gusty west winds in the mountains and deserts through this evening.
The ongoing dry weather pattern will continue through the early part of the weekend as weak upper level ridging moves eastward across the Western High Plains into the Central Plains. Low temperatures will continue an upward climb tonight as a prevailing southerly flow draws warmer air into the high plains, not to mention increasing moisture somewhat and raising surface dewpoints. Look for lows only down into the 40s(F) across west central Kansas to the lower 50s(F) in south central Kansas. Any chances for precip will likely be confined to eastern and possibly portions of central Kansas as the dryline, potentially overtaken by a cold front by this time, pushes into increased moisture/instability as the dynamic support aloft becomes more favorable with the arrival of a +90kt jet max.
408 AM MDT Sat Apr 8 2017 Large scale upper level trough from the Eastern Pacific continues to progress inland into the Western US this weekend. Cooling aloft with the incoming trough will allow the airmass to sufficiently destabilize this afternoon for a few thunderstorms with axis of best instability looking to set up roughly from Helena east to Lewistown late this afternoon into early this evening within an area of convergent low-mid level flow.
230 AM EDT Sat Apr 8 2017 High pressure for the weekend.
Kentucky Mesonet shows a few of the typical cool spots around and just below freezing at this hour, however most other spots are in the mid to upper 30s. In addition, there is a corridor of temps still in the lower 40s roughly along and just east of I-65. Temps should still be able to find their way solidly into the 30s to the point where patchy/areas of frost are possible, and with some areas at and just below freezing will keep the headlines as is. Overnight lows will be milder tonight, but still in the low to mid 40s in most spots.
High pressure will be present over the region in the morning, but will gradually shift to the east and south of the area by Saturday night. The beautiful weekend continues across the Tennessee Valley as high pressure both at the sfc and aloft continues to slide Ewrd, allowing for ample sunshine and temperatures climbing into the upper 70s (to perhaps lower 80s in a few spots). With much of the upper support displaced well NE of our area over New England, and another upper ridge building E into the area from the W, the front is expected to fizzle out as it slowly sags Swrd toward our area.
152 AM EDT Sat Apr 8 2017 High pressure will build into the area today clearing the skies and bringing milder air. This same fair weather system will control our weather into the first part of the work week, bringing gradually warmer days. Models continue to show warming aloft as the upper ridge builds. Conditions continue into Sunday under high pressure. High pressure crests over the area early in the day before sliding off to the east.
401 AM CDT Sat Apr 8 2017 With just a little bit of high clouds around, early morning temperatures range from the lower 50s inland to the upper 60s/around 70 at the coast.
Pressure falls over the high plains today will act to tighten the gradient and strengthen south southeast winds to moderate or breezy today.
358 AM EDT Sat Apr 8 2017 High pressure extending from the Gulf of Mexico up to the Great Lakes early this morning will build eastward.
316 AM CDT Sat Apr 8 2017 Fire weather concerns remain today as the high clouds currently overhead shift to the east. The main concerns fire wise will be the low rh values falling to 20-25 percent near and west of the MO River 18Z-00Z, and the strongest winds near and just behind the passing cold front. The timing of the strongest winds doesn't overlap with the lowest humidity values. So while grassland fire danger index values will rise into the high to very high levels, winds will not be as strong and widespread as yesterday. Dry weather will prevail until closer to 00Z Sunday, as the 500mb ridge that had been overhead slides to the Great Lakes Region.
625 AM EDT Sat Apr 8 2017 A ridge of high pressure will build east across the area today and then over the Appalachian Mountains tonight.
319 AM MDT Sat Apr 8 2017 Upper ridging continues its eastward track across the central CONUS with southwest flow aloft developing across the CWA during the overnight hours. ahead of an approaching upper trough over the west coast. This will result in a large range of max temps today with highs in the low 60s over northeast WY to the low 80s over far south central SD. The trough is still progged to cut off from the main flow tonight into Sunday as it crosses the Great Basin into WY. With the higher elevations of the Black Hills.
344 AM PDT Sat Apr 8 2017 A long wave trough continues it's eastward progression this evening generating scattered to widespread showers across southern Oregon and northern California.
346 AM EDT Sat Apr 8 2017 High pressure will build into the area today clearing the skies and bringing milder air. This same fair weather system will control our weather into the first part of the work week, bringing gradually warmer days. Models continue to show warming aloft as the upper ridge builds. Conditions continue into Sunday under high pressure.
340 AM EDT Sat Apr 8 2017 A ridge of high pressure will build east across the area today and then over the Appalachian Mountains tonight.
/22/ High pressure has been in control of our weather today with a dry and cool airmass centered over the region. Last night's low temps overachieved and with the ridge centered overhead tonight expectations are for the same to occur again. /TW/ Prior discussion below: Through the day Saturday: High pressure is delivering the region plenty of sunshine and temperatures generally a little cooler than average this afternoon, but the weather around our forecast area in the springtime really doesn't get a whole lot better than this! The high pressure responsible for the sublime conditions will be on its way off to the east through tomorrow, but only very slowly, which will ensure the perfection of this afternoon does not ebb quickly.
As south to southwest flow increases into the 10 to 15 mph range this afternoon as the ridge axis shifts east of the forecast area, expect maximum temperatures to climb to around 60 degrees +/- a degree. The pressure gradient tightens further on Sunday between the exiting high near the eastern seaboard and developing low pressure over the central plains. The aforementioned low pressure system to the west actually ejects into area in several pieces.
A cold front will also move across SE Oregon this morning and SW Idaho this afternoon. Temperatures will be much cooler today with highs generally in the 40s to lower 50s. Showers will decrease as an upper trough shifts to our east. An upper ridge will provide the region with drier conditions and lighter winds on Sunday.
357 AM MDT Sat Apr 8 2017 Today an upper level trof will be over the western states, and there will be increasing southwest flow aloft over southern CO. Ahead of the approaching upper trof, mstr will increase acrs western areas and some showers are expected to move over the Continental Dvd this afternoon. Tonight the upper trof moves into WY and western CO. Will go with the highest pcpn chances today and tonight over the central mtns, along with some light snow accumulations. High temps today are expected to generally be 10-15 degrees warmer than average.
425 AM CDT Sat Apr 8 2017 Departure of upper ridging this morning opens the door to deeper and drier SW flow. With height falls focusing to our west tonight ahead of a trough on Sunday, the dryline should easily retreat over much of the Caprock with perhaps some stratus farther east towards daybreak. There will be some cooler air filtering in behind the dryline resulting in highs about 10 degrees cooler than today for the Caprock and about 5 degrees cooler for the Rolling Plains.
643 AM EDT Sat Apr 8 2017 High pressure across the region today will push east of the region tonight.
108 AM EDT Sat Apr 8 2017 High pressure will bring dry and quiet weather through the weekend.
343 AM CDT Sat Apr 8 2017 Today: Approaching upper trough will result in a lee trough/dryline flirting with western border of forecast area today. Slightly stronger winds tonight will likely keep minimums on warmer side of guidance.
324 AM CDT Sat Apr 8 2017 High pressure ridge extended from Lower MI into the Deep South and was providing southerly winds on the return flow. This was keeping temperatures warmer than last night with 3 am readings in the upper 30s to mid 40s.
308 AM EDT Sat Apr 8 2017 High pressure will build in from the west today and remain overhead tonight before passing offshore on Sunday.
Strong low pressure over New England will move on to the east. High pressure over the middle Mississippi valley will move east across the Ohio valley late tonight and to the middle Atlantic coast over the weekend. An increasing southerly flow on the back side of this high will allow temperatures to become much warmer by Sunday.
440 AM EDT Sat Apr 8 2017 High pressure extending from the Gulf of Mexico up to the Great Lakes early this morning will build eastward.
635 AM EDT Sat Apr 8 2017 A trough of low pressure crosses the region today as high pressure builds in from the southwest.
349 AM CDT Sat Apr 8 2017 An upper trough is moving over the west coast and another upper trough is over the northeast U. Upper ridging is over the central part of the country with westerly flow over the area. A dryline will develop across the Lower Trans Pecos this afternoon with southwest winds behind the dryline. The previously mentioned upper trough over the west coast will move over the Rocky Mountains and the Northern and Central Plains on Sunday. Temperatures on Sunday will mostly be in the 80s and will be a little cooler from today due to height falls from the approaching trough.
Frost Expected Tonight, Some Locations Just Below Freezing. Still have some wind gusts out there, as the center of the high resides just far enough to our southwest to keep a gradient over the region. Our cool spots, especially in the northeast could see several hours of temperatures below freezing, so decided to add a freeze warning headline. High pressure will slide east of our longitude during the day Saturday, and a nice warmup will ensue. Lows Sunday morning should be well above the readings of Saturday, partly because of some warmer south winds starting to pick up ahead of the next low pressure system moving into the Midwest.
317 AM EDT Sat Apr 8 2017 A trough of low pressure crosses the region today as high pressure builds in from the southwest.
332 AM EDT Sat Apr 8 2017 An upper trough extending from Maine east southward east of the eastern conus will remain through tonight. A light easterly flow is forecast to develop this afternoon, keeping the coastal areas a couple degrees cooler than the interior. After a cool start this morning with temperatures in the 40s, and a few spots even in the upper 30s, temperatures will warm to the low to mid 70s, except near 70 along the east coast. Lows tonight are forecast to be in the 40s across the interior and the low to mid 50s along the beaches.
410 AM MDT Sat Apr 8 2017 Windy day in store for much of the area as gradients tighten ahead of a cold front that will be moving through the region later tonight and Sunday. Expect more virga today than rainfall as the low levels remain quite dry. Showers linger over the northern mountains through Sunday morning with dry and cooler conditions expected elsewhere as high pressure builds in from the west.
SHORT TERM (Today through Sunday): An extensive north/south mid level ridge axis from north mexico to the northern plains will shift slowly east during the period, with the northern section moving east faster than the southern part, leading to a positive tilt by the end of the short term. Light to moderate south southeast winds will continue locally as a result, with some strengthening due to pressure falls occurring over the high plains.
352 AM CDT Sat Apr 8 2017 An upper trough is moving over the west coast and another upper trough is over the northeast U. Upper ridging is over the central part of the country with westerly flow over the area. A dryline will develop across the Lower Trans Pecos this afternoon with southwest winds behind the dryline. The previously mentioned upper trough over the west coast will move over the Rocky Mountains and the Northern and Central Plains on Sunday. Temperatures on Sunday will mostly be in the 80s and will be a little cooler from today due to height falls from the approaching trough.
253 AM CDT Sat Apr 8 2017 Southerly flow continues today keeping low temperatures this morning relatively warm in the low 50s. Temperatures this afternoon will rise up even warmer than yesterday ranging from the low 80s in central Kansas where warm air advection remains prominent to the upper 70s in eastern Kansas. With an upper level ridge moving across the central US today, dry conditions will remain for today and tonight.
The 'urban heat island' effect is expected to keep Tallahassee a few degrees warmer than surrounding areas, keeping lows in the mid-upper 40s in the city. The broad upper-level trough over the eastern CONUS Saturday morning will be replaced by a ridge Sunday night. Temperatures will still be below average Saturday and Saturday night, with highs in the lower to mid 70s and lows in the lower to mid 40s. Temperatures will return to average Sunday and Sunday night with highs in the lower 80s and lows in the lower 50s.
301 AM EDT Sat Apr 8 2017 Low pressure will slowly shift east today through tonight as a narrow ridge of high pressure builds in from the west. High pressure will crest over the region on Sunday before shifting offshore. A warm front will pass north of the region Sunday night.
620 AM EDT Sat Apr 8 2017 High pressure will slide to our southeast today but will still be responsible for dry and quiet weather through the weekend along with a nice warming trend.
342 AM EDT Sat Apr 8 2017 High pressure will slide to our southeast today but will still be responsible for dry and quiet weather through the weekend along with a nice warming trend.
1228 AM CDT Sat Apr 8 2017 A cold front extended from a low over south central Saskatchewan southeastward into the northwest corner of ND, then arcing back southwestward towards Glendive/Beach. Currently, upper level ridge axis aloft moving east across the Northern Plains. Ridge axis continues east allowing for southwesterly flow aloft to develop across the region tonight. As this occurs a cold frontal boundary will move into western ND around 03Z and then proceed east-southeast through 12Z.
1200 AM MDT Sat Apr 8 2017 Large amplitude trough and cold air mass moving onshore the Pacific NW today will tighten the gradient between the high pressure in place over the next 24 hours and will bring a 90 to 100 kt upper level jet into the region Saturday afternoon. A strong cold front will be forced out of Utah and into Colorado early Sunday morning. Temperatures on Sunday will be some 10 to 20 degrees cooler on Sunday which will lead to another very cold start to the week.
650 AM EDT Sat Apr 8 2017 High pressure will build in from the west today and remain overhead tonight before passing offshore on Sunday.
248 AM EDT Sat Apr 8 2017 Temperatures will average below normal today as high pressure builds in from the northwest.
Today and Tonight: Continued dry but with warmer temperatures. Our northwest winds aloft early this morning will back to near zonal tonight as mid level ridging builds in the wake of the departing large amplitude upper level trough. Together these features will result in return flow later today and a return to warmer than normal afternoon highs today in the mid to upper 70s. A few sites may dip into the lower 40s, just below normal in the east but, warmer than normal low temperatures in the lower 50s are expected in our west.
Tonight Through Sunday High pressure will shift over the southeast United States this weekend. The high will provide dry conditions Saturday and Sunday, but breezy south to southwest winds are in the forecast. A cold front will slowly approach from the Plains. After cooler than average temperatures tonight, readings will be above average the remainder of the period.
609 AM EDT Sat Apr 8 2017 High pressure for the weekend.
633 AM EDT Sat Apr 8 2017 High pressure will build into the area today clearing the skies and bringing milder air. This same fair weather system will control our weather into the first part of the work week, bringing gradually warmer days. Models continue to show warming aloft as the upper ridge builds. Conditions continue into Sunday under high pressure.