Aikyam-Lab/Synoptic-Bench huggingface dataset:
A cold front will move through the region Tuesday morning. Winds will remain breezy tonight ahead of a cold front that will come through after this period. Strong cold front late tonight and Tuesday morning with sharply colder conditions on Tuesday. Deepening lee trof over eastern New Mexico will produce breezy conditions for the Panhandles today. The ECMWF and NAM have maintained good temporal continuity regarding placement of trof/closed low as compared to runs of 24 hours ago. All models have significantly strengthened this feature, with a more prolonged and deeper closed low now being depicted. The strength of the closed low passing the forecast area on Tuesday leads us to increase winds on Tuesday. Associated strong cold front should move through the Oklahoma Panhandle before dawn Tuesday and then sweep through the rest of the forecast area by 10 AM.
138 PM MST Mon Nov 27 2017 Broad ridging extends across the Central US, with a deepening upper level trough along the Pacific coast. ML winds behind the cold front would support gusts 40-45 mph.
211 PM EST Mon Nov 27 2017 High pressure continues to build in from the west today. The high will slowly shift off the coast Tuesday.
/Issued 252 AM EST Mon Nov 27 2017/ High pressure will persist through the short term portion of the forecast. The high center will move overhead early today, and begin to shift offshore by late today/early Tuesday. In the mid levels, a trough/cutoff low will push south over the area but isn't expected to be a weather-maker.
147 PM CST Mon Nov 27 2017 Upper ridge centered over Mexico this morning stretches northward across the country to Canada. However the next upper trough has moved ashore the west coast. This trough will move quickly east reaching the Southern Rockies by Tuesday morning and crossing the Panhandle during the day.
1139 AM CST Mon Nov 27 2017 Light southerly winds and some passing cirrus were keeping temps in the low 40s east to the low 50s west this morning. Southerly winds will keep temps up tonight ahead of a cold front moving south into Kansas/Nebraska and Iowa.
232 PM EST Mon Nov 27 2017 High pressure will crest over the region tonight then shift east on Tuesday.
1233 PM EST Mon Nov 27 2017 Mild, Pacific high pressure will build east across the Carolinas today, then offshore on Tuesday. -Ellis An area of high pressure at the surface and rising heights aloft will maintain clear skies across central NC through tonight. Low level thicknesses support high temperatures close to normal, generally around 60 north to the lower 60s south. This moderating air mass will translate to afternoon temperatures into the low-mid 60s under sunny skies.
Latest GOES-16 nighttime microphysics RGB imagery shows thicker mid level clouds well north of the area, with high clouds dropping down the ridge axis and working into the forecast area. Kept the forecast near the high end of the guidance, which is reasonably in line with the latest RAP, HRRR, and HopWRF forecasts. Cold advection and surface ridging will start to work in overnight behind the front.
311 PM CST Mon Nov 27 2017 Ridge over Midwest is on the move to the east with the trough along the Front Range quickly following in its exit.
Cold front was moving through southwest Idaho early this morning.
Very strong southwest winds will develop today as a cold front moves through the area.
1107 AM EST Mon Nov 27 2017 High pressure will bring mainly fair weather right through the end of the week. As the high moves east, a southwest flow will develop along with moderating temperatures. Satellite shows the low clouds beginning to thin and mix out. Otherwise high pressure will build into the area bringing clear to partly cloudy skies and fair weather. After a chilly start under clear skies, flow becomes southwesterly on Tuesday bringing milder air while ridging keeps the sun shining.
112 PM EST Mon Nov 27 2017 High pressure continues to build in from the west today. The high will slowly shift off the coast Tuesday.
441 PM EST Mon Nov 27 2017 High pressure will build across the region tonight through early Tuesday. A warm front will cross the region later Tuesday.
SHORT TERM (Tonight through Tuesday Night): A broad area of strong mid/upper level high pressure over much of Mexico will maintain a dry west to northwest flow aloft over deep south Texas through the period. At the low levels, weak southeasterly onshore flow will prevail. Surface dew points are slated to slowly increase over the next 24-36 hours with patchy fog possible for many locations early Tuesday morning as a weak cold front approaches from the north.
Breezy winds will remain up overnight, veering with time ahead of a fast moving cold front due in late Tuesday morning. An upper level trough moving across the Rockies today will induce surface lee troughing. This will mitigate the fire weather threat with cooler temperatures.
121 PM MST Mon Nov 27 2017 The latest observations show that the cold front has moved through most of northeastern WY and northwestern SD, on track to move across the CWA by 03Z this evening. Aloft, water vapor images show an elongated trough from east-central Saskatchewan to southern Nevada. As the trough moves across the CWA tonight the best upward motion and moisture will skirt to our south/southwest.
327 PM EST Mon Nov 27 2017 High pressure will bring mainly fair weather for much of the week. As the high moves east, a southwest flow will develop along with moderating temperatures.
234 PM EST Mon Nov 27 2017 The short term models are in very good agreement handling the upper level low that develops near the Georgia/Florida state line overnight. The low has little moisture to work with so no rain is expected, although FEW-SCT clouds will develop over south Georgia and spread northward by tomorrow afternoon. High pressure at the surface will keep winds relatively light overnight before becoming 5- 10 mph out of the southeast by late morning tomorrow.
327 PM CST Mon Nov 27 2017 The base of a sharpening, progressive upper level trough will shift out of southern Nevada and move across the Four Corners region overnight and position over northeast New Mexico and northern Texas Panhandle tomorrow afternoon. Though relatively small in areal extent, the progressive closed low will pack quite a punch as it passes tomorrow afternoon. Strong surface winds associated with a cold front will be enhanced due to efficient transfer of energy aloft to the surface, from mid-morning across the southern Texas Panhandle through the middle of the day in the South Plains and down to the I20 corridor by sunset. The updated ECMWF has slowed the upper level low slightly from previous runs, though the overall timing of the upper level system and surface front hasn't changed much.
The short term is characterized by a return of weak ridging to the region. Winds in the wake of the cold front will continue to slowly diminish overnight, but will not get down to light and variable levels.
205 PM EST Mon Nov 27 2017 Mild, Pacific high pressure will build east across the Carolinas today, then offshore on Tuesday. -Ellis An area of high pressure at the surface and rising heights aloft will maintain clear skies across central NC through tonight. Low level thicknesses support high temperatures close to normal, generally around 60 north to the lower 60s south. This moderating air mass will translate to afternoon temperatures into the low-mid 60s under sunny skies.
337 PM CST Mon Nov 27 2017 Through Tomorrow: Dry weather continues today through tonight under the influence of high pressure across the region. Most locations will warm into the low 70's under mostly clear skies.
401 PM EST Mon Nov 27 2017 Dry high pressure will build over the area into the middle of the week.
1201 PM EST Mon Nov 27 2017 Temperatures are running just a bit cooler than forecast in places. As such, have lowered the highs just a touch, with most locations reaching into the upper 50s, and a few sites hitting 60 degrees. Clear skies this morning will lead to a quick warmup as diabatic heating combines with a deepening boundary layer, tapping into warmer air aloft. The core of surface ridging shifting along the spine of the Appalachians coupled with dry northwest flow will maintain clear skies, aside from a few strands of passing cirrus, and late fall warmth across eastern Kentucky. Continually building upper heights will promote further warming today and Tuesday as eastward drifting surface ridging establishes south/southwesterly return flow.
Complex high based trof axis extends from the southeast US to off the Louisiana coast. At the surface, high pressure over the Appalachians tonight, moves off into the west Atlantic thru the day Tuesday.
255 PM CST Mon Nov 27 2017 Upper level ridging will persist over the Mid South through Tuesday. A closed upper level low pressure system now over the western states will move east and weaken through mid week.
252 PM EST Mon Nov 27 2017 High pressure will build overhead tonight and move to the east by Tuesday.
329 PM EST Mon Nov 27 2017 High pressure over the area tonight will move offshore Tuesday.
1018 AM MST Mon Nov 27 2017 An upper trough will cross the forecast area today with a cold front moving through at the surface this afternoon. The cold front is expected to enter northeastern Wyoming and far northwestern South Dakota shortly after noon, reaching the Black Hills area by mid-afternoon and then moving into Nebraska late this afternoon into early this evening. There is less certainty with high temperatures over the rest of the forecast area this afternoon, especially north of I-90 where the low level cold advection will be strongest.
Conditions will improve to VFR after 15Z, with a cold front and a northerly wind shift expected just beyond the end of the forecast period. /issued 347 AM CST Mon Nov 27 2017/ Upper ridging is over the region with an upper trough over the west coast that will move east today. The base of the upper trough will move over the area beginning tonight. Winds will weaken later Tuesday prior to a cold front moving into the area resulting in cooler temperatures especially across the northern CWA. The upper trough will move over the region quickly so this will not allow any high wind event in the Guadalupe Mountains to last.
219 PM CST Mon Nov 27 2017 Southerly winds will continue into and through this evening as a cold front begins to take shape and move east across the plains late tonight. A cold front will approach the Ozarks and briefly, check up, along the I-44 corridor as a nearly stacked surface and upper low develops over the central plains. The front will then moves slowly through the area as the upper low moves east.
High pressure building toward the mid Atlantic coast will support tranquil boating conditions over the Gulf waters the remainder of today with northeast winds around 10 knots and seas of 2 feet or less.
151 PM EST Mon Nov 27 2017 High pressure in control through mid week.
1155 AM EST Mon Nov 27 2017 High pressure in control through mid week.
Lows will be about 5 to 10 degrees warmer than last night.
212 PM EST Mon Nov 27 2017 Except for a few light snow showers over Northern NY, building high pressure will bring fair weather to our region for Monday, while a warming trend is forecast Tuesday afternoon. The tail end of a cold front is moving through the area right now and temps are a little cooler than forecast over our northern zones in central NY so adjusted temperatures down over this area for the rest of today. A weak cold front dropping into our northern forecast area will briefly increase snow shower activity early this morning. Building high pressure will clear skies out late today and for tonight. In addition upper atmospheric ridging will move over NY and PA, with the result being much higher-than-normal thicknesses. Temperatures on Tuesday will climb into the lower and middle-50s.
148 PM EST Mon Nov 27 2017 South winds ahead of a cold front will continue to bring warmer air into the region through Tuesday. Low temperatures tonight will drop into the lower to mid 40s, while highs on Tuesday afternoon will reach the mid 50s to around 60. Lows will generally drop into the low to mid 40s with highs into the upper 50s to near 60 tomorrow. This feature will force a trailing cold front into nw IN/lower MI Tuesday evening and points southeast later Tuesday night.
305 PM CST Mon Nov 27 2017 H5 analysis from this morning had a broad ridge of high pressure across the most of the lower 48 with ridging extending north into south central Canada. Upstream of this ridge a trough of low pressure extended from western Alberta south into southern California, where a closed low was present near San Francisco. For tonight, increasing high clouds are anticipated and with enhanced mixing from a cold front, overnight lows will be relatively mild. Coolest readings will be across northwest Nebraska where high pressure will begin to settle in. Modest cold air advection behind the front will allow for noticeably cooler high temperatures on Tuesday. Readings will range from the upper 40s across northwest Nebraska to the lower 50s across our far east.
With ridge of high pressure at surface and upper ridge upstream aloft. /ISSUED 303 AM CST Mon Nov 27 2017/ High pressure over the mid Tennessee valley continues to ridge into SE TX bringing drier air and clear skies to the region. The high will move east today and E-SE winds will develop and bring slightly higher moisture levels back to the area tonight and Tuesday. High moisture levels on Tuesday should yield more cloud cover but warmer 850 temps and increasing heights will yield slightly warmer temperatures.
As of early this morning, northeast Montana finds itself in the warm sector of the larger-scale synoptic low pressure system. The attendant cold front is now pushing through western and central portions of the state. A chance of rain showers will also accompany the cold front as it slides through the region later today. Tuesday will be a calmer and cooler day as post-frontal flow returns from a dry NW direction.
121 PM EST Mon Nov 27 2017 Dry high pressure will build over the area into the middle of the week.
442 PM EST Mon Nov 27 2017 High pressure will crest over the region tonight then shift east on Tuesday.
Temperature will not be as cold with lows in the lower to mid 40s.
325 PM CST Mon Nov 27 2017 Upper level low pressure trough out west was bringing thick high level clouds to the region this afternoon which has kept temperatures down along with a shallow mixing layer. At the surface, a trough/cold front across the cwa this afternoon will be moving east tonight with winds becoming northwest bringing in cooler air for Tuesday. As the upper level low pressure trough passes by later tonight/early Tuesday, the mid and high level clouds will also move east.
Will have to watch and may have to lower the highs some. Warm air advection is significant, and even though mixing is limited initially, it it looks like the trough will move across the region by mid to late afternoon allowing for a more favorable westerly component to the wind direction.
1225 PM EST Mon Nov 27 2017 Temperatures are running just a bit cooler than forecast in places. As such, have lowered the highs just a touch, with most locations reaching into the upper 50s, and a few sites hitting 60 degrees. Clear skies this morning will lead to a quick warmup as diabatic heating combines with a deepening boundary layer, tapping into warmer air aloft. The core of surface ridging shifting along the spine of the Appalachians coupled with dry northwest flow will maintain clear skies, aside from a few strands of passing cirrus, and late fall warmth across eastern Kentucky. Continually building upper heights will promote further warming today and Tuesday as eastward drifting surface ridging establishes south/southwesterly return flow.
118 PM EST Mon Nov 27 2017 High pressure continues to build in from the west today. The high will slowly shift off the coast Tuesday.
1131 AM EST Mon Nov 27 2017 High pressure will support dry and warm weather through mid week.
Persistent onshore flow with gradual moistening in the lower levels will allow isold-sct showers to move onshore the coast during the mid week.
1122 AM CST Mon Nov 27 2017 Record high temperatures in the 70s are expected today with an upper level ridge over the central plains and southerly surface winds. There will be a rather decent south breeze today as the pressure gradient tightens ahead of an approaching cold front. A cold front will swing through the area tonight and end our flirtation with record highs although the air behind the front will still be mild by late November standards. Highs will be cooler with cold air advection behind the cold front, but this is only a glancing blow at cooler air with highs likely still in the 50s or generally around 10 degrees above normal. There will be a small cut off upper low that will track south of our forecast area Tuesday night bringing rain to portions of Kansas and Oklahoma.
Temperatures will cool rapidly after sunset, but on average should be about five degrees warmer tonight than last night.
1216 PM EST Mon Nov 27 2017 High pressure will dominate the region into Tuesday then shift east to allow a cold front to move through Tuesday night.
302 PM CST Mon Nov 27 2017 Record warm temperatures being experienced in portions of the forecast area today, ahead of a cold front that was moving through the western Dakotas late this afternoon. Cold front will move into northwest portions of the forecast area after 00UTC, and will move south of the I-80 corridor by 12UTC. Record low maximum temperatures generally in the upper 40s, so though minimums will be 15-20 degrees warmer than normal, still will not be record setting. Temperatures on Tuesday will be about 15 degrees cooler than today, as diurnal mixing offsets cold advection, especially across southern portion of the forecast area.
1232 PM EST Mon Nov 27 2017 High pressure will support dry and warm weather through mid week.
Aloft, ridging is found across the central CONUS, with recovering heights into the Ohio and Tennessee valleys. Dry and mild weather will continue across eastern Kentucky, as high pressure remains in control through the period. Tonight will feature clear skies, with temperatures dipping down as cool as the mid 20s in the cooler valleys, while the ridges remain in the low to mid 30s. The center of the high will shift to the east on Tuesday, allowing for better return flow and consequently warmer air. On Tuesday night, short wave ridging will build in aloft, allowing for a reinforcement of high pressure from the Great Lakes to the Tennessee Valley. A few more high clouds will be seen towards dawn, as a short wave trough approaches from Oklahoma.
So I am thinking the blended model pops are on the high end and with that in mind trimmed back the pops to 20% across extreme se portions of the area and the adjacent atlantic coastal waters for this afternoon and left them at 0% elsewhere. /issued 319 AM EST Mon Nov 27 2017/ Another dry day is in store for us across South Florida starting with a cool morning with temperatures in the low 60s along the e and west coast metro and upper 50s in the interior. High pressure over The Carolinas will move east shifting winds more east to northeast through mid week.
/issued 958 AM CST Mon Nov 27 2017/ High pressure centered over the Tennessee Valley will move east today with low level southerly winds allowing temperatures to warm to several degrees above average.
210 PM EST Mon Nov 27 2017 Temperatures are running just a bit cooler than forecast in places. As such, have lowered the highs just a touch, with most locations reaching into the upper 50s, and a few sites hitting 60 degrees. Clear skies this morning will lead to a quick warmup as diabatic heating combines with a deepening boundary layer, tapping into warmer air aloft. The core of surface ridging shifting along the spine of the Appalachians coupled with dry northwest flow will maintain clear skies, aside from a few strands of passing cirrus, and late fall warmth across eastern Kentucky. Continually building upper heights will promote further warming today and Tuesday as eastward drifting surface ridging establishes south/southwesterly return flow.
236 PM CST Mon Nov 27 2017 Pressure gradients will tighten up strongly this evening as a cold front moves into the central and northern Plains, heading toward central IL Tuesday afternoon. Timing of the front looks as if it will produce another quite warm day Tuesday especially the Illinois River southeastward where highs should reach the low to mid 60s, while afternoon cooling to the northwest should limit highs to around 55 to 60.
230 PM EST Mon Nov 27 2017 High pressure in control through mid week.
/Issued 309 AM EST Sun Dec 31 2017/ Models in good agreement in building a strong arctic high pressure system into the southeast U. New Years Day looks to be a cold day with much of north Georgia not getting above freezing.
Tomorrow night will be our coldest night of the season so far with low temperatures in the -20 to -25 range as high pressure builds in across the Dakotas.
Tried to keep temperatures near to where they were today though a tad bit cooler for the northern valleys as some cooler air should move southward. Monday, more of the same as we stay between the deep trough out east and high pressure to our west.
Tonight the center of the 1050mb arctic high pressure will move southward into southeast Nebraska and north central Kansas where winds will be the lightest around 5 mph. The well advertised, strong surface anticyclone (central pressure: 1055 hPa) will continue to overspread the area throughout New Year's Day. The aforementioned surface anticyclone will remain overhead throughout the day on Monday and Monday night.
443 AM CST Sun Dec 31 2017 Upper level flow remains northwest as a ridge persists over the west coast and deep trough over the eastern two- thirds of the United remains under the influence of a mean trough, with a jet stream shoved anomalously far south, allowing for very cold temperatures. The surface temperature will likely stay below zero for much of the area today, except for perhaps near the Nebraska/Kansas state line into north central Kansas where it will struggle to reach the lower single digits. Again, nothing to bank on for warmer temperatures.
Without much wind under the high, wind chill below minus 40 is hit and miss, but with most temperatures well within the advisory criteria of minus 20 to minus 40, wind chill warning headline still seems reasonable. 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.
We just sent a quick update to issue a freezing fog advisory for areas between Cheyenne and Laramie and for areas between the Colorado/Wyoming border and mile marker 50. This stratus deck was yielding to some fog over the higher terrain where the Laramie and Cheyenne Airport was near one quarter of a mile. We have pondering on issuing a dense fog advisory for the higher terrain through 15z, but the latest web cams along I-80 was only showing a couple places where the visibility was near a quarter of a mile. However, it will be warmer than previous days. The rest of the week should be a bit milder as the upper level ridge moves over the region.
Overall, little change is expected thru the first couple of days of 2018 as high pressure remains over the area maintaining the dry and relatively mild weather pattern. Mid-level moisture increases over the region this afternoon into this evening as a wave moves through the ridge. Precipitation prospects will increase across NorCal by mid-week as the another batch of energy lifts out of the trough off the West Coast giving the region a glancing blow.
New Year's Day will trend âwarmerâ with highs on either side of 0F.