Aikyam-Lab/Synoptic-Bench huggingface dataset:
1231 PM CDT Wed Sep 20 2017 A cold front was moving through the area at 07Z and will continue to push southeast gradually slowing and stalling after 12Z as it reaches eastern Iowa and northeast Kansas. General features of the upper pattern show little change from earlier runs except being a bit slower with the transition of the western trough eastward.
254 PM EDT Wed Sep 20 2017 A weak mid level trough will move east of the area today. Over the next several days, a stagnant weather pattern will set up, with mid-level ridging and high pressure near the surface. Fog potential is the greatest concern for tonight, with a favorable setup in the wind and pressure pattern (overall light flow with the main axis of the boundary-layer ridging just to the east). Strong H5 ridge will be the dominant feature for much of the forecast period. The ridge will keep Jose off the East Coast and away from the Ohio Valley, and later on Maria.
Temperatures are running a few degrees warmer than forecast so have bumped them up based on current trends.
1222 PM CDT Wed Sep 20 2017 A cold front is very evident on radar this morning displaying itself as a fine line from eastern Nebraska through north central Kansas and into southwestern Kansas.
244 PM CDT Wed Sep 20 2017 Cold front at 18z had pushed just south of the area, and was defined very well by a wind shift and an associated cloud street field from northeast KS through northeast IA. The stalled front then begins to lift back as a warm front by daybreak Thursday. Quite warm and muggy conditions persist Thursday night with lows only in the lower to mid 70s.
Plenty of sunshine in eastern half of the forecast area though low orographic stratus remains in place over most of the higher terrain. Models have been very consistent in holding heaviest precip band along southeast highlands for quite some time as upper low sags toward Southwest Idaho.
223 PM EDT Wed Sep 20 2017 High pressure remains centered northwest of the area through the weekend while Tropical Cyclone Jose will to meanders south of the New England coast. Any convection from the lingering moisture stays west and south of the fa Thursday as high pressure continues to dominate into the weekend.
320 PM PDT Wed Sep 20 2017 Cooler weather continues this week with a chance of showers into Thursday. Turning warmer and drier this weekend. Current satellite imagery indicates a deepening trough along the West Coast. The upper trough will usher in cold air aloft, so snow levels could be dropping to around 6500 feet. Even a few inches of snowfall accumulation will be possible across the higher peaks.
259 PM MST Wed Sep 20 2017 A region of low pressure will overspread the Western states the latter half of this week.
Primary question this period is maximum temp extent underneath tremendous upper ridge blowing up ewd of deep trough carving out through the wrn US and stormy wrn Atlantic through wrn Caribbean. Ridging sfc and aloft builds further to begin this period. VFR in wx nil conditions this period as ridging sfc and aloft builds across the area.
316 PM MDT Wed Sep 20 2017 Warm and dry pattern will be in place through much of the short term as a deep upper trough digs across the Great Basin, and increasing southwest flow aloft ahead of it over the CWA.
1157 PM CST Sun Dec 31 2017 For the 01/06Z TAF period, VFR conditions are now observed at all sites with the exception of LFK where the low stratocu deck still holds MVFR cigs for a few more hours before clearing to the south.
A series of ridges of high pressure will be the primary weather makers in the extended across eastern Kentucky.
1014 PM MST Sun Dec 31 2017 1000PM UPDATE: News incoming is that Fort Peck lake has finally iced over and the chances for visibility reductions due to freezing fog downwind has dropped to near zero. Have gone in and removed mentions of freezing fog from the forecast for tonight. Second, a few hi- resolution models were pointing toward the Fort Peck Lake producing freezing fog and sending this off slowly in the direction of Malta and Whitewater. For the remainder of the week, upper ridge along the west coast will shift eastward over the Great Basin. This will spread warmer air across the Divide, starting with a Chinook in Alberta on Monday.
Cold front along the east slopes of the central mt chain with lcl MVFR to IFR cigs ewd to the TX border. A frigid airmass will persist across the eastern plains with subfreezing temperatures along New Mexico's eastern border until Tuesday. Patchy and dense freezing fog is likely tonight into New Year's morning along the east slopes of the central mountain chain; including much of the I-25 corridor, and the I-40 corridor across the East Central Highlands. Bridges and over passes could become slick as mist freezes onto them. A ridge of high pressure will cross the Rocky Mountain states during the middle to latter half of the week spreading fair and warmer weather from western and central New Mexico onto the eastern plains.
If it doesn't "go away" the low temperatures, especially over the northeast corner, will be to cold. For Monday, drier and somewhat warmer air will spread across the forecast area. Conditions will quickly clear Tuesday as strong subsidence moves overhead and 500mb heights increase as an upper ridge over the west coast moves east.
241 AM CST Mon Jan 1 2018 Bitter cold this morning with dangerous wind chills across the entire region as arctic high pressure dominates over the Heartland.
Lone lake effect band is weakening as it shifts northeastward, with mostly clear conditions outside of this band and the ridges. mainly along north of I-80 and over the ridges as the main upper level trough axis drives through the region. With winds aloft, west of north-west, expect most of the snow showers Monday to be over the favored lake band locales and higher ridges.
255 AM CST Mon Jan 1 2018 Arctic high pressure is centered over northwest South Dakota, which is leaving the far east with just enough of a gradient to keep us mixed, and northwest low level flow over the warmer lakes is also resulting in flurries and stratus, mainly near the Pierre to Chamberlain areas. With a ridge axis overhead, we can anticipate another night with favorable radiational conditions and readings again falling into the teens to 20s below. Not much moisture given the airmass overhead, however did upgrade the low pops/flurries mention to more 20-40% pops but with no accumulation.
High cloudiness forecast to thin/erode after 18-21z Mon as ridging rebuilds over the region in the wake of the short wave. This would lead to clearing skies and the higher probability of some fog, say from Sac area Swd. Patchy fog may continue to develop each morning but the extent should be limited to near water ways thanks to all the high clouds.
A cold front is draped across north/central Florida at this hour, with a shallow wave analyzed just west of the state in the eastern Gulf.
The cold front tracks through the area Tuesday afternoon and evening, but mixing and delayed cold air advection will prevent lows from dipping much below zero Tuesday night.
Models generate warmer temperatures than does MOS for the overnight, with similar wind speeds through the overnight.
Expect the main forms of precip will be freezing rain and sleet due to an elevated warm layer. Latest model guidance is showing high winds through Guadalupe Pass lasting until around mid morning so have extended the High Wind Warning for the Pass until 15z. Temperatures today are expected to remain below freezing for areas along and east of the higher terrain with highs only in the 20s across the Permian Basin. Areas to the west and south will warm up above freezing on Tuesday.
Water vapor imagery depicted a broad upper level low over eastern North America with north-northwesterly flow aloft over the northern plains. A pocket of low level moisture on the northeast side of the mid-level ridge axis may produce some low stratus over central and northwest North Dakota overnight. Through the end of the week the synoptic pattern depicts a broad trough east and a building ridge over the Rockies, keeping cold air outbreaks well to our east and bringing near normal temperatures to our area. Strong high pressure in western North Dakota will promote Skc and light winds through the taf period.
1054 PM CST Sun Dec 31 2017 WV imagery this afternoon was showing the extreme western CONUS under the influence of an anomalous upper ridge situated over west coast. Meanwhile, a deep longwave trof was in control over the eastern half of the country. an intense large area of high pressure was in control across the majority of the CONUS.
1106 PM CST Sun Dec 31 2017 Broad upper troughing remains from the Great Lakes into the Plains with the Polar low remaining over southeast Ontario/Quebec. At the surface, high is centered over southern SD with cold front well off of the TX Gulf coast. Frigid airmass will slowly push east after Mon, with highs by Wed expected to be near the freezing mark for most of the area, which is still around 10 degrees below normal. These extended periods will start with a deep upper trough over eastern CONUS with nw flow situated over the Plains. A strong and very cold high pressure currently dominates the region. This high pressure had allowed VFR conditions to dominate the region for the overnight period and for New Years Day.
The sprawling area of high pressure over the Northern and Central Plains will drop into the mid Mississippi and Ohio Valley late tonight. As a result, southern Wisconsin will remain in a pressure gradient on the north side of the high as surface winds become more southwesterly. Forecast confidence is medium to high: A trough of low pressure will approach on Tuesday, moving through Tuesday night. and then only saturate for a few hours in the lower/mid levels. Despite the likelihood of flurries, kept precip chances on the low end given the uncertainty of any measurable snowfall.
254 AM CST Mon Jan 1 2018 Arctic high pressure remains over the region at 08Z with temperatures in the -10 to -20 range this hour. As the high moves off to the southeast Tuesday and Tuesday night another cold front moves through the area Tuesday night.
Warmer air aloft moves in behind the disturbance with forecast high temperatures coldest in the east with mid 20s while across the west low to mid 30s.
A large dome of high pressure will continue to move slowly southeast through the Midwest and Plains states tonight/New Years Day, then settle into the lower OH Valley Monday night/Tuesday. We may get just a bit of moderation in temps Tue/Tue night as surface winds turn more southwesterly ahead of the next approaching cold front.
Meridional mid-level flow was in place across the CONUS, with a broad trough stretched across the eastern half of the U. and a broad ridge over the western U.
245 AM CST Mon Jan 1 2018 Models show arctic high pressure will keep hold of the weather across our region through mid week. Models show the high will be centered over the PAH forecast area at 18z Tuesday, sliding east of our region Tuesday night.
) A ridge will remain near the West Coast while a deep trough persists over eastern North America. Still, subtle changes to amplitude and position of the eastern trough will occur as Pacific energy works through/around the ridge, and those will have impacts on the weather across the area.
The low level flow shifts from northwest to west Tuesday then southwest late Tuesday night. This will shift the lake effect from the high terrain south of Syracuse to the Tug Hill.
There is an upper level wave and weak cold front that will move through the area Tuesday afternoon and evening.
The stubborn upper ridging that had been over the west coast of the United States will move over the Rockies this week.
Light lake effect snow showers will diminish Tuesday night as a small area of high pressure noses into NY and PA.
Gradient between the high and low pressure off the coast will keep winds elevated over Arkansas tonight and Monday.
Happy New Year Everyone! Still looking at VFR conditions for all terminals as of 06Z, but this will be changing as a cold front approaches from the north. all terminals down to Fort Myers area will be under the lower cigs.
922 PM PST Sun Dec 31 2017 High pressure aloft will maintain fair and mild weather this week, with periods of high clouds, as areas of low clouds and fog visit the coastal areas each night.
/Tonight through Monday/ Dangerously cold conditions will continue through Monday as an Arctic high pressure area slides down the Missouri River valley.
Dry conditions with warmer than normal daytime temperatures continuing this week.
312 AM EST Mon Jan 1 2018 Canadian high pressure will build toward the region through Tuesday.
Surface pressure gradient across the mid state remains strong, owing mainly to the strength of the high, so winds will remain up overnight, hence the wind chill advisory.
Strong anticyclone building across the central US and remnant lake aggregate troughing should maintain moderate pressure gradient across the area, and thus could see winds saying up in the 5 to 10 mph range through most of the night. Did go ahead and stay close to previously forecast mins from 5 below to 12 below (warmer in single digits above zero near Lake Michigan), but with these winds staying up overnight have some concern that even areas across the north/northwest could flirt with wind chill criteria. Another shot of cold advection is in store behind the passage of this upper trough for midweek with another round of lake effect snow expected Wed-Fri.
1138 PM CST Sun Dec 31 2017 Arctic high pressure will slowly build south across the northern Plains tonight and then the Corn Belt region on Monday. With the high pressure still well off to the north, a persistent north wind will continue. High temperatures on Monday will likely not warm out of the single digits across central Missouri, with highs only in the lower to perhaps middle teens across far southern Missouri. If there is any good news, wind speeds will start to decrease in the afternoon as that high pressure continues to approach from the north.
324 AM EST Mon Jan 1 2018 A deep upper trough anchored across south central and southeast Canada will keep a steady stream of Arctic air flowing into the eastern United States this week.
1037 PM MST Sun Dec 31 2017 Dry northwest flow aloft continues as forecast area remains between a strong ridge to the west and a broad low pressure to the east. A weak upper trough will slide mostly down the front range Monday night and bring isold high mountain showers after midnight to the Park and Gore range.
The high will settle right over Nebraska tonight, ensuring winds to stay light and clouds continue to lift/clear over the Sandhills. Forecast soundings and isentropic analysis indicate a possible mid-level (around H7) warm front pushing into southwest Neb. SREF keeps the higher probability of low cigs (under 3kft) in the panhandle. For Monday, return flow takes over as the high pushes east of the area, but there is little in terms of temperature recovery. The center of 1045 mb arctic high pressure will move over Omaha Tuesday morning and the model consensus shows it ridging west through the Platte Valley.
Arctic high pressure will remain over western Kansas through Tuesday morning before slowly moving off to the east. The longwave trough responsible for the arctic air will progress eastward, with a slow warming this week and into the weekend.
High pressure aloft will gradually strengthen across the region through the middle of the week. Mid level ridging along the Pacific Coast is maintaining a dry northwesterly flow downstream across the Great Basin.
351 AM CST Mon Jan 1 2018 A COLD start to the New Year early this morning as the combination of an arctic air mass and a clear sky have dropped temperatures into the low to mid Teens across the Tennessee Valley. Cold temperatures will be the theme of the week ahead across the Tennessee Valley, as it is hard to find any compelling evidence that it will warm above the freezing mark much at all this week, save for a few instances. Still, it appears that temperatures reaching the freezing mark will be a long shot -- with upper 20s highs more likely.
Mixture of stratiform/convective precipitation over the CWA today likely associated with the upper jet streak and isentropic lift/low condensation pressure deficits (300K at least), and the isolated/scattered shower/thunderstorm activity over the MSA linked to the coastal trough. Expect the coastal trough to move onshore and over the ERN CWA early Tuesday in response to the foregoing upper disturbance.
400 PM CST Mon Dec 18 2017 A deformation zone trailing southwest of Great Lakes area troughing will reside over the local area tonight into early Tuesday.
109 PM PST Mon Dec 18 2017 Fair and seasonally mild weather will continue through Tuesday under high pressure aloft.
At the surface, a sw flow prevails between high pres to the south and east and a low pressure trough approaching from the Plains. WAA will help push temps above seasonal averages with highs in the lower to mid 30s. Tonight, A series of embedded trough axes rounding a broad mid-level low over Hudson Bay will brush the CWA tonight.
118 PM MST Mon Dec 18 2017 High pressure will nose over the area from the southwest tonight and Tuesday. A closed upper low will pass through southern New Mexico tonight and Tuesday placing the forecast area under the col created between this low center and zonal flow over the northern Rockies. The short term will remain dry but high clouds will ride over the top of the ridge so variable higher clouds are expected.
On Tuesday, a short wave ridge aloft will be over the region.
For now, leaned closer to the GFS for highs this afternoon, with most locations topping out in the low to mid 60s. An upper level low across northern Mexico and the Desert Southwest will track west toward the forecast area tonight.
Currently, air temperatures generally range from the lower 70s over southeastern Georgia to the lower 80s across the central Florida Peninsula.
This should be just some light rain or a brief rain and snow mix before it moves south of the region later tonight as a cold front slide south. Tuesday will be in between systems and cooler than today.
Any areas where clearing takes place could see some warmer temps and current forecast has a good handle on that. The lowest ceilings and drizzle have been primarily confined to locations west of the Illinois River and along/east of the I-57 corridor. Current IR satellite imagery shows the back edge of the low clouds well to the west from central Iowa to eastern Kansas. Warmest day of the forecast period still appears to be Tuesday, as ample sunshine and mild W/SW winds ahead of an approaching cold front push high temperatures well into the 50s.
1106 AM EST Mon Dec 18 2017 Update Areas of light freezing rain or drizzle will make for slick travel this morning north of I-96. -10 corridor that remain right around freezing with drizzle/freezing drizzle still falling. Conditions will improve quickly as southerly winds picking up will take temperatures above freezing up there. Have issued a Winter Weather Advisory for ocnl light freezing rain and drizzle for much of the area north of I-96 through 11 AM. Sub freezing sfc and road temps are currently present across the advisory area and model consensus is for between 0. Sfc temps are progged to slowly recover above freezing from south to north through the morning, but latest lamp guidance at Big rapids and Mt Pleasant indicates temps remaining below freezing through 15Z.
1117 AM EST Mon Dec 18 2017 Mild air will surge into the region through Tuesday ahead of a low pressure system that will approach from the west.
The upper low is forecast to remain well south of Colorado through tonight, so light westerly flow aloft will remain across the region. Look for max temps in the 40s to around 50F for the high valleys today, and 50s for the e plains.
Closed low along the AZ/Sonora, Mexico border will drift slowly east and weaken into Tuesday.
307 PM CST Mon Dec 18 2017 (Tonight and Tuesday) An upper low currently over northern Mexico and the Desert Southwest will lift northeast across the area on Tuesday. Precipitation will diminish from southwest to northeast Tuesday afternoon and end across far northeast counties early Tuesday evening as the upper low departs the area. Temperatures will be warmer tonight, with lows mainly in the mid and upper 40s, with highs on Tuesday in the upper 50s and lower 60s. 24 (Tuesday Night through next Monday) Our area will have clearing skies Tuesday night, as a weakening upper trough lifts northeast into Oklahoma.
A split upper trof is currently moving across the western CONUS, with the northern portion heading across the northern Plains states toward the Great Lakes, and the southern portion in the form of a nearly entirely cutoff low over the Sonoran desert region of the US and Mexico. These will continue off and on throughout the day as this trof slowly moves south and east through the region, and some locations across far northeast Montana may see between half an inch to an inch of snow. Just behind this, a low pressure system will push into the area from the northwest, allowing cold air to push into Montana from the north.
315 PM EST Mon Dec 18 2017 A weak warm front will lift north into the region this evening and will stall over the region later tonight. A cold front will approach from the west on Tuesday and will cross the region Tuesday evening.
252 PM CST Mon Dec 18 2017 An upper low currently over the AZ/NM state line will slowly push eastward this evening into tomorrow morning before transitioning into an open wave.
Main Focus Next 7 Days is Strong Cold Frontal Passage Thu with Aloft: Low-amplitude W-WNW flow will prevail overhead thru tomorrow. Aloft: Major amplification with a Wrn USA trof forming and gradually drifting E into the Cntrl USA.
Based on latest hi-res guidance, the higher rain chances were shifted back to the west into our far southwest zones in Deep East Texas. Isentropic lift should be increasing overnight as a warm front from the S LA/SE TX coast begins lifting back northward. Thus we should begin to see increasing coverage in showers from south to north which could provide enough mixing to limit the lower vsby/ceiling restrictions. A warm front near the coast with dewpoints in the lower 70s over the gulf waters will begin pulling rich moisture onshore with pcpn water values nearing 2 inches, very unseasonally high. This slow movg warm front will reach near the interstate 20 corridor by Tue aftn with very heavy rain near this frontal boundary.
Chattanooga Airport, TN 58 43 60 52 / 10 10 60 100 Knoxville McGhee Tyson Airport, TN 57 41 60 47 / 10 0 40 90 Oak Ridge, TN 56 42 59 46 / 10 10 40 90 Tri Cities Airport, TN 55 37 59 43 / 10 10 20 70.
408 PM EST Mon Dec 18 2017 A deep ridge of high pressure will continue to dominate the weather pattern over the region through the weekend.
1030 AM MST Mon Dec 18 2017 Low amplitude ridging sits across the much of the western CONUS and is building into the region. Warmer air is advecting into the northern plains, which will bring much warmer temperatures to the CWA than yesterday. A series of waves pushing across the west/northwest flow will weaken the ridge late today into tonight, bringing a cold front to the area.
1251 PM EST Mon Dec 18 2017 High pressure situated off the Southeast Coast with a stalled front across the southern Midlands will promote a slight chance of showers this afternoon.
221 PM EST Mon Dec 18 2017 High pressure will continue offshore through Tuesday.
Otherwise, dry and warmer weather is expected today and Tuesday.
1204 PM CST Mon Dec 18 2017 Quasi-stationary frontal boundary remains stretched SW to NE across the coastal waters and into the lower Atchafalaya. In addition to the low stratus, fog is expected to begin developing around 00Z at all TAF sites. /issued 530 AM CST Mon Dec 18 2017/ The subtropical jet continues to stream moisture in from the eastern Pacific as the warm front has push inland over the region.
138 PM MST Mon Dec 18 2017 A low-amplitude ridge continues to build into the northern plains. At the surface, a weak trough covers the region.