Aikyam-Lab/Synoptic-Bench huggingface dataset:
928 PM MST Fri Dec 9 2016 Cold high pressure remains over central SD with temperatures from -10 to 10. RIW sounding is about 20 degrees warmer above the inversion than UNR. with northwest SD in the single digits while northeast WY and southwest SD reaches the low 30s. The biggest gradient could be along the northern foothills as the Black Hills warm into the low 30s and the surrounding plains reach the upper teens to low 20s. Colder air will push back into the area on the backside of the low as it pushes E/SE of the CWA. May be some lingering light snow across southwest South Dakota, otherwise some sunshine and slightly warmer temperatures expected.
For Saturday and Sunday, temperatures will rise well above freezing for the first time in several days, as strong warm air advection pushes warmer and moister air into the area. Areas along and north of I-70, and likely even north of HWY 36 could see temperatures struggle to get above freezing through early Sunday, so precipitation that falls could fall as either light snow or light freezing drizzle.
306 AM EST Sat Dec 10 2016 Regional observations this morning are showing most areas either at or already well below freezing and diminishing winds under clear skies should improve radiational cooling enough to support temps falling a few more degrees before sunrise this morning. Meanwhile, high pressure well to our east will still be nosed in across portions of north/central Georgia through the overnight hours.
/issued 939 PM CST Fri Dec 9 2016/ The low clouds were able to clear out of western portions of the FA late this afternoon and evening before the high clouds moved over the area.
As of mid afternoon, high pressure over Arkansas and low pressure over the Great Lakes was continuing northwesterly flow over the lower Ohio Valley. It's been a cold day with readings in the mid/upper 20s under the clouds while closer to the TN border temperatures have risen to around the freezing mark. The aforementioned high pressure moves nearly overhead during the day tomorrow and should provide the area with more sunshine and slightly warmer, but still below normal, high temperatures. Readings are expected to top out in the low 30s across southern Indiana to mid/upper 30s across central Kentucky. The high quickly moves east and southerly return flow sets up Sunday night.
915 PM PST Fri Dec 9 2016 A weak trough passing by to the north will bring high clouds, a deeper marine layer and possible light showers Saturday night and Sunday.
357 AM CST Sat Dec 10 2016 Early morning surface analysis showed an Arctic pressure ridge over the Ohio Valley, extending into the Midsouth. Southeasterly low level flow will develop over the Midsouth, behind the departing pressure ridge. Low level modified maritime air will enter the delta area tonight and Sunday, ahead of approaching Pacific cold front.
Saturday should prove to be warmer and could see some mid 40s for highs in the western CWA as a warm air advection pattern sets up in the lower atmosphere. This precipitation will spread east across the CWA during the morning and may begin briefly as some light freezing drizzle or light freezing rain in the far eastern sections of the CWA. This chance at wintry precipitation will not be long-lived as temperatures should warm above freezing at the surface by mid morning. A better chance of measurable rainfall will occur during the afternoon hours as the cold front moves through.
may have some patchy freezing fog generally along and a row of counties east of the CO/KS border where saturated boundary layer moisture is forecast. Warm front generally extends along and perhaps a row of counties east of the CO/KS border during the day with high temperatures in the mid 40s to mid 50s west of it and only mid 30s to near 40 east of it. For tonight warmer air aloft mixes down from west to east as winds veer to the west and northwest. High temperatures generally in the mid 30s north to the low 40s far south.
Highs on Saturday will likely be in the lower 50s although temperatures won't fall much more than that Saturday night as the boundary layer continues to moisten and warm.
The afore-mentioned surface cyclone is still scheduled to move east into KS and Western OK on Sunday. Thu-Fri: All will be quiet as strong high pressure dominates. a MUCH STRONGER Arctic High centered over the Upper Mississippi Valley with a VERY INTENSE cyclone over the Southern Rockies, Southern KS may see a thaw on Fri where a more southerly lower-deck flow would reside.
The low-level ridge will shift to the east with light southeast to southerly flow returning by the end of the day. Therefore, expect highs will be about 5-10 degrees warmer than yesterday with most locations topping out in the mid 30s to mid 40s. This trend will continue into the overnight hours as the cold air retreats to the north and the southerly flow and warm air advection become more established in the low-levels.
Models show increasing warm advection today across eastern Kansas which will send temperatures above the freezing mark with highs from the mid 30s to near 40. Tonight the lower boundary layer will remain mixed through the night especially across northeast and east central Kansas. Lows tonight will be in the 30s with some upper 20s across north central Kansas as a cold front approaches from the northwest. By Sunday morning, a mid-level trough will be skimming eastward across the Northern Plains with a surface cold front quickly tracking eastward across the CWA. With warm-air advection expected overnight tonight into Sunday morning, expect temperatures to be warm enough to keep this precipitation as drizzle (rather than freezing drizzle).
Surface winds will swing southeast tomorrow with warmer temperatures in the upper 30s to mid 40s.
400 AM EST Sat Dec 10 2016 High pressure will prevail until the development and passage of a coastal trough into Sunday night.
Those south winds will help usher in somewhat warmer temperatures today, with highs expected to range from the mid 40s over southwestern Missouri to the upper 30s over the eastern Ozarks and central Missouri. Temperatures tonight will fall into the 30s, though are expected to remain above freezing for all but the far eastern reaches of the forecast area. There will be a very small window for a bit of freezing drizzle across the eastern Ozarks early Sunday, but for most areas, temperatures are expected to be above freezing before any precipitation begins.
WV imagery indicates an upper level trough of low pressure extending southward across the Central Plains into the South Plains while upper level ridging continues to build across the Intermountain West. A gloomy Monday across much of SW Kansas through this afternoon, as upper trough slowly inches its way into central Kansas. Sky will clear progressively from NW to SE as upper trough departs. Highs in the lower 60s with north winds of 10-20 mph.
728 PM EST Mon Nov 7 2016 High pressure will extend into the region from the north through Tuesday.
This rain is being produced by a deformation band in association with a slow moving upper trough. The upper trough will continue to gradually slide east through the evening and overnight hours with the rain coming to an end from west to east this evening. Expect clear skies with a light north wind as a sfc area of high pressure slides into the region. This will make for good radiational cooling and lows that should fall down to around or a few degrees below freezing in most areas.
Upper ridge will continue to build through Tuesday. Patchy fog could form in the Lower Treasure Valley around Ontario, north into the Upper Weiser Basin early Tuesday morning as an inversion develops overnight. Temperatures will be warmer Tuesday with highs approaching records at a few locations.
944 PM EST Mon Nov 7 2016 High pressure will build over the area through Tuesday.
608 PM EST Mon Nov 7 2016 A large area of high pressure will slowly recede off to the southeast overnight and Tuesday.
Only changes at this time are to tweak the lows tonight. The strong upper level ridge over the western U. The blocking ridge will remain in control of our weather through the rest of this week.
With an upper level trough still to our west. In the short-term, the highest chances exist roughly along and east of the I-35 corridor. To the west, an additional area of showers and thunderstorms is expected to develop this evening as a very weak front or trough axis--currently situated from southwestern Oklahoma and into the Texas Big Country--slides southeastward. As a result, the highest PoPs for this evening and overnight (60-70%) are painted effectively west of the I-35/35W corridor. With this in mind, we'll need to keep an eye on precip rates and repeated hits from storms, and a somewhat higher flood threat may exists north and west of a Breckenridge to Gainesville line tonight.
507 PM CST Mon Nov 7 2016 Upper-level trough bringing rain today will be the only source of sensible weather through the next 7 days. Subjective 12Z upper-air analysis indicates 500mb trough axis through the heart of ND/SD/NE/KS and toward the OK-TX panhandles. Short-range models are persistent in dissipating shower activity as it moves into eastern NE this evening, with upper-level trough weakening and elongating and mid-level moisture veering southeastward.
602 PM CST Mon Nov 7 2016 A weak cold front is moving through the forecast area this afternoon and evening will bring in a colder airmass into the region for tonight and Tuesday. This should keep temperatures relatively warmer there, but where it stays clear tonight temperatures should fall into the mid-upper 30s. Tuesday to be cooler as well, with highs only in the mid 40s to mid 50s. Today highs in Saskatchewan have only risen into the lower to middle 50s, so I expect similar conditions for most areas Tuesday.
1036 PM EST Mon Nov 7 2016 Made a few adjustments to the low temperatures based on the latest trends in observations. Most locations are running a few to several degrees warmer compared to last night at this time, while others are actually somewhat cooler. Did adjust the diurnal curve to account for the falling valley temperatures, otherwise the current lows look on track thus far, with the coolest spots around the 33 or 34 degree mark, while ridges only drop to the upper 40s. The smoke should begin to disperse tomorrow evening, as winds shift to the southwest and then west and northwest and increase in speed as a cold front approaches and eventually moves through the area.
651 PM EST Mon Nov 7 2016 Dry high pressure will will persist over the area through Tuesday.
The upper ridge axis continues to edge eastward and with this in mind, there may be a little more of a scattered to broken cirrus deck building over the western third of the forecast area, so will add a few more clouds here.
629 PM EST Mon Nov 7 2016 High pressure will be in control of the weather through Tuesday bringing clear skies and light winds.
With additional cloud cover, tomorrow should be a few degrees cooler. For Tuesday, a cold front and upper trough will approach the area bringing rain showers late in the day on Tues to southern IN/northern KY and then to the entire area Tues night.
High pressure moving into eastern ND late tonight. The upper trough currently over the region will move off to the east tonight.
648 PM EST Mon Nov 7 2016 A cold front will approach the area from then northwest tonight resulting in increasing cloudiness. Dry conditions will return to the area late Tuesday night, with cooler, more seasonable temperatures into late week. Short term period highlighted by precip chances Tuesday as cold front pushes southeast through the region. Attendant surface trof/cold front will enter our northwest early Tuesday morning and exit the area early Tuesday evening. previous forecast, however kept POP's capped at 70%, with the highest POP's across the southeast during the afternoon hours, where forcing is slightly better.
932 PM EST Mon Nov 7 2016 High pressure will be in control of the weather through Tuesday bringing clear skies and light winds.
Cannot rule out widely scattered/isolated shower activity as broad upper troughing envelops the state.
An impressive 588dm upper ridge slides into the forecast area Tuesday.
A Lee- side trof forms off the Rocky Mountains and brings warmer air back to the region after a brief cooler day today.
Breezy Low level E/NE flow will weaken slightly into tonight, but remain elevated up to around 15 knots at 925mb as high pressure settles southward over the Southeastern United States. However, shallow layer of moisture and elevated onshore flow in the lower levels is still squeezing out a few light sprinkles in convergence induced cloud bands over the Atlantic. Onshore flow will keep min temps in the upper 60s to low 70s along much of the coast, while farther inland lows are forecast in the low to mid 60s.
932 PM EST Mon Nov 7 2016 High pressure will prevail through Tuesday keeping the region dry.
442 PM MST Mon Nov 7 2016 High pressure will remain in control through the middle of this week.
649 PM EST Mon Nov 7 2016 Aviation The long stretch of nice weather will come to an end on Election Day as a cold front will bring rain. It will also be cooler with highs in the mid to upper 50s.
712 PM EST Mon Nov 7 2016 High pressure over the mid atlantic region will maintain onshore flow overnight. Coastal trough is expected to develop late tonight and move onshore in the morning.
602 PM EST Mon Nov 7 2016 High pressure will allow for one more dry and warm day on Tuesday.
That could produce a window for FG, but most likley focus then shifts to the potential for additional MVFR ceilings behind a stronger cold front that will move through the region by 12z. However, a trailing mid-level trough is expected to remain just east and south of the CWFA. A cold front has slowly moved south across the area today with low clouds hanging around especially in the northeast. Around midnight, a secondary push of cooler and drier air will dive into the region with breezy northerlies persisting much of the day on Tuesday. High pressure then builds in during the late afternoon yielding diminishing wind speeds.
The upper ridge continues to shift off to the east with an axis of moisture moving in from the west, along a surface convergence feature. These will very slowly move to the east so low temps in the east will be much cooler than the temps in the west, ranging from the lower 40s to the lower 50s. The rain that is impacting Mississippi is expected to stay there overnight due to the strong high pressure/drier air over the local area. The aforementioned clouds are along the leading edge of a rather complex positively tilted trough oriented from the Great Lakes to the Red River Valley. The southern extent of the trough will become cutoff/retrograde across the southern Plains resulting in a mainly dry frontal passage for the Tennessee Valley late Tuesday/Tuesday night.
858 PM CST Mon Nov 7 2016 Wx map shows weak sfc trof over Northern Gulf south of the Louisiana coast.
646 PM EST Mon Nov 7 2016 VFR conditions are forecast through the TAF period as high pressure continues to be in control.
Dew points are around 15 degrees cooler than the surface temperatures so much of the rain seen on radar isn't making it to the ground. /issued 531 PM CST Mon Nov 7 2016/ An upper level low pressure system over the Central Plains today will remain cut off from the main flow and drift southwestward over the next several days. High pressure should rebuild behind the front with a return to dry weather and slightly cooler temperatures.
715 PM EST Mon Nov 7 2016 Short range models are in good agreement with high pressure over the deep south beginning to loose its grip as a series of upper disturbances approach from the west tonight.
Slightly warmer temperatures can be expected on Tuesday.
920 PM EST Mon Nov 7 2016 High pressure will persist across the region into the middle of the week.
A gloomy Monday across much of SW Kansas through this afternoon, as upper trough slowly inches its way into central Kansas. Sky will clear progressively from NW to SE as upper trough departs. Highs in the lower 60s with north winds of 10-20 mph.
Thin high-level clouds continue to move across Alabama this afternoon with more expansive cloud cover to our west in association with an upper trough. This can be attributed to lift remaining weak along the positively-tilted upper trough and very dry low-level easterly flow in advance of the front.
Warm dry high pressure will continue across the eastern Great Basin through the rest of the week. High pressure is centered over NV this eve with a mild dry airmass in place over the forecast area. A little thin cirrus is drifting thru the ridge and dissipating as it moves south through nwrn UT.
655 PM EST Mon Nov 7 2016 High pressure centered across the northeast states will move southward and weaken. Meanwhile a cold front will move southeast across the Great Lakes on Tuesday and through the region Tuesday evening.
633 PM EST Mon Nov 7 2016 High pressure will be situated east of the area overnight and Tuesday allowing for southerly flow. A cold front will move through Tuesday evening and Tuesday night. This will allow for warmer temperatures overnight tonight than last night. Lows overnight will generally be in the low to middle 40s except for some upper 30s east of Columbus. Southerly flow will pick up on Tuesday in advance of a cold front that will move through Tuesday evening into Tuesday night.
Radar mosaic showing a larger band of rain over southwest Missouri which is tracking northeast and this band should affect parts of our area by tomorrow morning just ahead of the approaching cold front. Looks like a few showers around into tomorrow afternoon before the front shifts southeast taking most of the rain with it with cooler temperatures filtering in behind the front. The high pressure ridge just to the east is slowly losing ground to the advancing storm system to the west. connected by a cold front/sfc trof will move closer to the Midwest overnight, bringing an increasing cloud cover of mostly mid clouds at least early on. Cold front expected to be past the I-70 corridor by Tuesday evening as it makes its way southeastward toward the east coast.
After a quiet night with increasing clouds, a cold front will approach and move through central Indiana on Tuesday bring rain chances to the area Tuesday and Tuesday night. Dry weather is expected tonight as high pressure continues to move off to the east. Clouds will increase through the night from the west as an upper wave and surface cold front make their way east out of the eastern plains. With southerly component flow and increasing clouds low temperatures should be around 10 degrees warmer than last night in the upper 40s to around 50. A cold front will move into the area on Tuesday along with an upper wave.
912 PM EST Mon Nov 7 2016 High pressure remains in control of the region through Election Day.
Otherwise, behind the passing cold front, northerly winds will be quite gusty as we go throughout the day. /Issued 310 PM CST Mon Nov 7 2016/ Reinforcing cold front will move into the Texas and Oklahoma Panhandles this evening and overnight, with increasing wind speeds.
This ahead of a sharp trough across Oklahoma and Kansas. This trough will shift eastward into the area tonight and early Tuesday. Trough axis pushes east of the area Tuesday afternoon with diminishing rain chances. By Tuesday night, trough slips south of the area, while ridging begins to build in aloft.
The protective ridge shifts slowly east through Tuesday evening as a long wave trough builds southeast out of Canada into the Northeastern U.
632 PM EST Mon Nov 7 2016 High pressure will persist across the region into the middle of the week.
For Tuesday, a cold front and upper trough will approach the area bringing rain showers late in the day on Tues to southern IN/northern KY and then to the entire area Tues night.
Deep layer ridging will keep most areas dry tonight although we could see a few showers over the marine area. Look for lows in the upper 40s around Albany to the lower 60s at the coast.
The weak front and associated positive-tilt upper trof will eventually sag south of the area by early Tuesday.
Further west over central KS, some clearing late may allow temperatures to fall into the low 40s. MWM/KED Precip chances will diminish/end from northwest to southeast across the forecast area on Tuesday, with the remnant trof shearing east of the area as the main upper trof drops southeast across the Great Lakes. Cooler/drier high pressure will settle south across the area on Tuesday night.
Did adjust the diurnal curve to account for the falling valley temperatures, otherwise the current lows look on track thus far, with the coolest spots around the 33 or 34 degree mark, while ridges only drop to the upper 40s. The smoke should begin to disperse tomorrow evening, as winds shift to the southwest and then west and northwest and increase in speed as a cold front approaches and eventually moves through the area.
619 PM EST Mon Nov 7 2016 High pressure will crest over the area through Tuesday.
Tonight and Tuesday The latest RAP analysis and radar/satellite imagery show high pressure centered over the mid-Atlantic coast and a cold front moving east over the northern Mississippi Valley. The cold front is mostly inactive so far today, with only light returns showing up on area radars, but no ground truth. The weak cold front will move across the state late this evening and overnight. Lows will be warmer than last nights readings thanks to cloud cover, and range from the low 40s north to near 50 in the east. However, shallow low level moisture will be diving south within thermal troughing at 925mb.
The current temperatures are running close to MOS guidance, with lows forecast below freezing by Tuesday morning. High pressure will remain in control through the middle of this week.
906 PM EST Mon Nov 7 2016 High pressure will allow for one more dry and warm day on Tuesday.
624 PM EST Mon Nov 7 2016 High pressure centered across the northeast states will move southward and weaken. Meanwhile a cold front will move southeast across the Great Lakes on Tuesday and through the region Tuesday evening.
The current situation shows a fairly classic long wave pattern with the trailing forcing and cold front aloft from the eastern Ontario short wave tied into the stronger forcing and deformation zone of another wave approaching from KS and NE. Temperatures will be somewhat cooler behind this system and frontal passage but still remain seasonal and just above normal in most locations. There looks to be some patchy freezing conditions or frost in favorable low lying areas Wed morning, but no appreciable change in the southern extent of the current freeze progression. Another strong upper level ridge will build through the Rockies keeping our airmass dry with little if any forcing.
A surface cold front associated with this trough, along with enhanced frontogenetical forcing, will support chances of rain showers. The cold front could linger through much of Tuesday, so chances of rain showers will linger in our southeast in the afternoon.
Some of these may produce up to an inch of rainfall because of the slow eastward movement underneath the upper low. After the larger area of rain moves out of the fa this afternoon, the best chance for rain will be tonight as cold front moves across the area.
Upper level trough will continue to be the primary weather influence and thus the lower clouds should prevail for much of Tuesday with showers still possible throughout the day. Upper-level trough that has brought showers to the region today will remain north and west of the region through Tuesday night providing periods of showers with possibly isolated thunderstorms.
Back door cold front has moved south of the forecast area is pressed up against the east slopes of the central mountain chain. A weak back door cold front will drop into the eastern plains this evening with gusty north to northeast winds to follow. Otherwise, breezy gap winds will impact the middle rio grande valley overnight as the back door cold front squeezes through the gaps. Look for cooler temperatures tonight into Tuesday after passage of the front.