Aikyam-Lab/Synoptic-Bench huggingface dataset:
A dissipating weak cold front currently splits the CWA in half with low cloud decks and patchy fog across the eastern portions of the area. Another surge of high pressure arrives tonight with winds backing to the north. /issued 415 AM CST Thu Nov 30 2017/ SHORT TERM (Today through Friday): A dissipating weak cold front currently splits the CWA in half with dewpoints in mid 40s to around 50 across the northern and western ranchlands and dewpoints in the low to mid 60s across the Rio Grande Valley. Another surge of high pressure arrives tonight bringing slightly drier air into the region.
407 AM CST Thu Nov 30 2017 A cold front extending from near Quincy to Columbia will continue to push southeast this morning. Short range guidance has the low level trof and moisture convergence ahead of it sweeping out of the forecast area by 12-13Z. GOES-16 imagery is showing the low level cloudiness moving out behind the front. although high level clouds are streaming in from the west on a plume of moisture ahead of the upper level trof.
Winds will become elevated and gusty out of the north this morning as a cold front moves into the area. /issued 429 AM CST Thu Nov 30 2017/ Current observations show a cold front moving through West Texas and has almost reached the Permian Basin. However this cold front will become stationary near the Pecos River later today, and any front this time of year that fails to progress any farther than that is weak and in fact we will see higher temps today than we saw yesterday. An upper low currently off the southern coast of California will move east in this zonal flow along the U.
948 AM EST Thu Nov 30 2017 High pressure today gives way to the next round of precipitation arriving this evening. High pressure returns during the day Friday, leading to a rather quiet and mild weekend. Today will start off dry as the ridge of high pressure continues to shift eastward. Winds will be a bit gusty, especially in the Champlain Valley this afternoon with winds 15-25 mph and gust up to 35mph while other locations should remain in the high teens to low 20s for gusts. Models continue to lower QPF with the northern counties and higher elevations still seeing the highest amounts around 0. Overall, most of the higher elevations should see mainly snow showers with the valleys seeing rain showers switching to a mix before things quiet down early Friday morning.
A weak cold front will traverse the region today, bringing scattered showers to most of the region. Expect cooler overnight lows with most spots dropping into the 30-35 degree range.
621 AM CST Thu Nov 30 2017 Today will be sunny and a little breezy as high pressure builds into the region. A cold front moved across the Upper Midwest last night and led to a brief period of gusty winds. Overnight lows could be a bit cooler in the typical cold spots of eastern Mn and western WI, depending on the timing of the southwesterly winds.
531 AM CST Thu Nov 30 2017 Surface observations indicate a NE to SW oriented cold front currently extends from KMCB through KLFT to south of KCVW that is slowly progressing eastward this morning. LIFR visibilities and ceilings are expected to prevail for the next 1-2 hours for KARA and KLFT before the cold front moves through and conditions begin to gradually improve to IFR and VFR by mid morning. The areas of dense fog expected to dissipate across Southeast Texas and Western Louisiana around 6 AM or so as slightly cooler and drier air filters slowly westward. The chance of showers will end from west to east as the cool front moves southeast this afternoon, bringing back the drier and cooler air to the region through the weekend.
655 AM EST Thu Nov 30 2017 High pressure over the Northeast U. A dry cold front that will cross the area late tonight.
Despite increasing high clouds, current temperatures are running considerably cooler across much of the region and range from the mid 20s in the colder mountain valleys to the upper 30s to mid 40s across the Central Valley and foothill/mountain thermal belts. Broad flat upper ridging will continue through Friday.
959 AM EST Thu Nov 30 2017 High pressure over the Northeast U. A dry cold front that will cross the area late tonight.
As for today and into tonight, there is a cold front expected to push through the CWA. As the the trough swings through, west upslope flow seems to be intensifying precipitation along the Cascades.
521 AM CST Thu Nov 30 2017 High pressure over the western high plains at 08Z will build east through the day bringing considerable sunshine and another day of above normal temperatures to the region.
/issued 245 AM CST Thu Nov 30 2017/ A cold front will move through the Mid-South today. Temperatures will remain mild today as the cooler air behind the front will not filter into the region until tonight. Canadian high pressure will build into the region for Friday. Temperatures will be 5-7 degrees cooler with highs ranging from the mid 50s to the lower 60s.
842 AM EST Thu Nov 30 2017 A cold front, will bring showers to the area this afternoon and evening. then east of the ridges by early/mid-evening.
610 AM EST Thu Nov 30 2017 Cold front Thursday/early Thursday night. High pressure for the weekend.
631 AM EST Thu Nov 30 2017 A weak cold front will approach today and move into the area tonight.
1054 AM EST Thu Nov 30 2017 A mostly dry cold front will approach from the the west today and will move through the region overnight. High pressure will build in behind the front and will dominate through the weekend. Highs in the lower 60s NW to upper 60s SE. As suspected, models have trended drier and drier with the moisture- starved cold frontal passage this evening and overnight, choked off by an overwhelming westerly downslope component east of the mountains. The approach of the cold front into the southern Appalachians will result in increasing Cloud cover will increase from to east during the evening hours. The high will extend down the eastern seaboard Friday night.
538 AM CST Thu Nov 30 2017 Expect near seasonal normals for temps and dry weather for the next few days as a ridge of high pressure moves rapidly across the plains. Zonal mid level flow will keep things moving along, with the ridge moving rapidly east of the area by early Fri.
As for this today and into tonight, there is a cold front expected to push through the CWA. As the the trough swings through, west upslope flow seems to be intensifying precipitation along the Cascades.
Slightly cooler highs are forecast this afternoon. Model consensus is in the low to mid 50s, with MOS running just a few degrees warmer than the models overall this afternoon.
508 AM CST Thu Nov 30 2017 Mvfr stratus deck will affect the area into the morning hours, but should scatter out as a remnant frontal boundary moves east of the state, and high pressure pushes in. However, it will scatter out after sunrise, as high pressure moves in and the gradient increases. Cooler air will move into the region as well, but it's not a significant cooldown just yet, given zonal flow aloft. Not only that, the high will move through fairly quickly, with winds gaining more of a southerly component by late Friday.
603 AM CST Thu Nov 30 2017 A cold front extending from near Quincy to Columbia will continue to push southeast this morning. Short range guidance has the low level trof and moisture convergence ahead of it sweeping out of the forecast area by 12-13Z. GOES-16 imagery is showing the low level cloudiness moving out behind the front. although high level clouds are streaming in from the west on a plume of moisture ahead of the upper level trof.
The current breezy northerly winds associated with a cold front will gradually swing around to the east this afternoon and become light and variable by evening. A cold front moving through early this morning will only bring slightly lower temperatures to the region compared to yesterday. However, extensive high level cloud cover could keep temperatures a few degrees cooler as well.
544 AM EST Thu Nov 30 2017 High pressure will bring another day of fair weather and above normal temperatures to the Appalachians and central mid Atlantic region today. A cold front will then move across the area tonight, with the best chance of showers west of the Blue Ridge. Another large area of high pressure will build in behind the front and bring generally fair weather with temperatures at or above normal through the weekend. A dry wedge of high pressure will bring pleasant weather to the region again today before clouds increase during the afternoon as a cold front approaches from the west. The front will move across the region tonight with the best chance of showers west of the Blue Ridge. Lows tonight will be in the low to mid 40s east, mid 30s to around 40 west.
939 AM EST Thu Nov 30 2017 High pressure will crest over the area this morning before retreating into the maritimes this afternoon. A weak cold front will push east through the region tonight accompanied by some light rain and snow. High pressure and drier air follows late Friday into the upcoming weekend.
956 AM CST Thu Nov 30 2017 Cold front, now knocking on our door near Land Between the Lakes, and will continue to push eastward for the remainder of the day, and shove a band of scattered showers out ahead of it. Still looks like most high temperatures today will be in the lower and middle 60s. A cold front is set to push in and across the area later today.
This will tend to keep temperatures a few degrees cooler than with full sun.
648 AM EST Thu Nov 30 2017 High pressure will drift east of the region today, while a frontal system approaches from the Ohio Valley. A cold front will cross the region tonight, bringing scattered light showers. High pressure will then rebuild and bring a return of dry weather for Friday and on through the weekend. H5 ridge axis propogating east of the Commonwealth while a shearing upper trof undercuts that ridge, producing an area of mid level clouds moving across central PA this morning, as per latest GOES-16 IR imagery.
Winds should then decrease tonight, as high pressure builds into the area. Cooler air will build into the region tonight, as high pressure moves through the lower Missouri River Valley. With dewpoints also remaining in the mid 20s, and clear skies and light winds, we will need to watch for the potential for light fog or freezing fog early Friday morning, especially in the favored low areas and river valleys.
653 AM EST Thu Nov 30 2017 A cold front is beginning to reach extreme western lower MI this morning with a narrow band of light rain showers just ahead of it. Clouds look to quickly scatter out behind the front as high pressure ushers in a dry airmass. Trough axis is entering the western Great Lakes early this morning. Models show some low to mid level theta-e advection being brought in under southwest flow ahead of the trough between 07-12Z, which will work to saturate the environment. The active wave pattern we have seen over the last several days will come to an end through the weekend as mostly zonal mid level flow and high pressure take over. This will keep temperatures pretty steady in the 40s with lows in the lower 30s.
339 AM MST Thu Nov 30 2017 Scattered mid and high level clouds, low dewpoints, and a little bit of wind should keep most of the freezing fog pretty isolated this morning. There has been little change in the forecast models from run to run the past 24 hours, in regards to the long wave trough over the weekend.
Cold front located back across western AR at this time.
1044 AM EST Thu Nov 30 2017 Skies are mostly clear across the gulf waters and Lower Keys, with patchy clouds streaming into the Upper and Middle Keys and across the warmer waters of the Florida Straits. Mid-level ridging is building across North Florida, and WV imagery indicates dry conditions aloft across the Florida Peninsula. Scattered showers are located in the open waters of the Florida Straits and are drifting southwest near 15 knots, with the highest coverage 40 nm south of the Lower Keys. The Pulley Ridge Buoy in the southeast gulf reports seas near 4 ft. This means slightly cooler, slightly drier conditions are on the way, as advertised. In terms of ACE (Accumulated Cyclone Energy), which measures the combined strength and duration of tropical activity, the 2017 hurricane season was the 5th most active on record to date.
720 AM EDT Wed Mar 28 2018 A warm front will surge through the region early today. A much warmer southerly flow is expected this afternoon through Thursday night.
Light showers lingering over the higher terrain this morning will end by the afternoon.
744 AM EDT Wed Mar 28 2018 High pressure is bringing quiet weather this morning. Clouds will increase from west by aftn and there may be light rain showers into the west ahead of approaching cold front. Since more open water has developed over western Lk Superior in the last couple days, increasing moisture up to H85-H8 and H85 temps of -14c will support at least isolated lake effect, especially in the higher terrain of the west and maybe the north central. A cold front moving through late today could bring MVFR conditions with isolated light rain showers to IWD and CMX this evening. Strongest winds up to 30 kts are expected this weekend as low pressure system tracks across Upper Great Lakes.
High pressure centered over the Atlantic will keep onshore flow across the area. It could be a little breezy along the coast, and will be a little cooler there today too with highs in the mid 70s. Inland, high temperatures will top out in the low 80s. High pressure will remain centered across the Atlantic the next few days.
1106 AM CDT Wed Mar 28 2018 Updates this morning mainly for a small area of sprinkles and showers developing near and west of the lower Illinois River in warm advection ahead of the approaching trough/cold front to the northwest. Steady stream of rain continues along and south of I-70 early this morning, as an area of low pressure rides along the front over the Ohio Valley. However, as the upper trough over New Mexico begins to swing east, another surge of moisture will be advancing northeast. At the same time, the wave over the Dakotas will push a cold front into central Illinois by late evening. Overall upper pattern will feature broad troughing over the central U.
The mean ridge position will remain off the coast into Thursday before moving into the Great Basin this weekend. Morning water vapor and H5 analysis indicate a high amplitude trough downstream over the western plains, and upper ridging oriented just off the Pac coast. Do expect modest northwest winds to continue across prone areas of the Uinta Basin/Castle Country today as H7 flow remains elevated and sufficient mixing of the low levels is aiding enhancement for the prone downslope areas. A somewhat dirty northwest flow will continue across mainly northern portions of the CWA through Thursday as the mean ridge position holds off the West Coast with the mean trough in the Plains.
A northwest flow will continue over the region as a ridge of high pressure offshore over the eastern Pacific Ocean remains in place.
Given the steep lapse rates today into tonight, and the potential for banded precipitation, some of the lower elevations could see some slushy or locally slick roads this morning and again tonight into Thursday morning. At this time, not anticipating the need for any advisories for the lower elevations, but will continue to monitor. Elsewhere across the high country, several inches of snow are possible as well, mainly above 6,000 feet.
An upper ridge extends northeast up the east coast this morning from a large high pressure area centered over the Gulf of Mexico. This upper high pressure will gradually shift eastward over the Caribbean and western Atlantic over the next 24 hours.
Despite this loss of deeper moisture, low level moisture will remain largely undisturbed today in advance of a decaying upper low. This low level moisture is evident in the form of widespread stratus this morning, however earlier ACAR profiles indicated this cloud layer is rather thin and should have little difficulty eroding slowly through the day as insolation improves. Model soundings depict enough clearing by peak heating which combined with a favorably timed upper low and healthy cold pocket should garner a few hundred J/kg of CAPE. Although this low will gradually decay/fill today, enough convective signals remain among the experimental CAMs and most operational models to justify isolated storms this afternoon. Would expect CAPE to be a bit less in those areas that saw heavy rainfall yesterday as temps there will likely be cooler from increased evaporational cooling.
IFR is expected there until mid morning before offshore flow burns off the lower cloud. The thermal trough remains anchored along the coast, producing strong north winds and steep wind driven seas. Though conditions have briefly dropped below small craft advisory levels, the thermal trough will strengthen today as temperatures inland rise.
/issued 359 AM CDT Wed Mar 28 2018/ The upper cutoff low has become an open trough, and will eject eastward over the region today. The best lift for showers and thunderstorms will be well east of the region today, but there could be isolated showers, if not a storm or two, due to the elevated instability created by the cold pool aloft under the trough.
The weather pattern continues to show a weakening upper level ridge over the region with a cold front to our west. the ridge will slowly shift to the south and east with the front approaching from the west.
A round of VCTS/VCSH is possible this evening as the upper level trough moves across.
Widely scattered predawn light rain with a few wet flakes are possible along the northern third of NW MN and with SFC and road temps above freezing so no impacts are expected. Colder air will begin to rush in on NW winds as the cold front pushes quickly across the area. However, clouds will increase Thursday afternoon and evening with the approach of a cold front. As the cold front pushes southward through the region Thursday night light snow will be possible across much of the region with the best chance for any accumulating snow across southeastern ND/western MN.
Also made some adjustments to the overnight lows, as it looks like cloud cover may keep the eastern Panhandles warmer than anticipated. Lastly, pops have been readjusted to focus more on the areas that look to be more favorable for rain showers today, via the high resolution models.
648 AM CDT Wed Mar 28 2018 Cold front is currently pushing through the far southeast portion of the forecast area. As the cold front exits the region this morning strong cold air advection will kick in. High pressure and much colder temperatures will settle in over the area tonight.
As the low pressure system that created the unsettled weather the last two days moves off to the east, a high pressure ridge will expand into the region from the pacific coast. Building high pressure will lead to dry weather with near normal temperatures.
/issued 418 AM CDT Wed Mar 28 2018/ (Today and Tonight) A cold front has moved through most of the area early this morning.
515 AM MDT Wed Mar 28 2018 The region will remain on the SW periphery of a deep upper trough centered over interior Canada. A stronger western NOAM ridge topping impulse will force a vigorous cold front into the region by the end of the work week, with temperatures expected to be 15-25 degrees below seasonal averages by this coming weekend.
740 AM EDT Wed Mar 28 2018 The wedge continues to erode as the center of the high pressure becomes anchored off the coast of the Carolinas. Not much chance for showers today as we remain under the influence of the ridge aloft.
753 AM EDT Wed Mar 28 2018 Aviation High pressure will provide dry weather today, but clouds will linger especially from Grand Rapids to the south and east. Rain will redevelop late tonight and continue Thursday as low pressure tracks through the Ohio Valley Region.
A large positive tilt upper trough is currently positioned over New Mexico and northern Mexico. Head of this feature, abundant low and mid level moisture is streaming northward, resulting in unsettled weather and flooding across a good portion of the Texas Gulf Coast into the lower Mississippi Valley region. To the east of this slow moving trough, an expansive upper ridge continues to build across the Gulf of Mexico and into the Mid Atlantic. The weather will change little over the next 36 hours with high pressure in control from the surface and through the troposphere. A few areas across the interior peninsula may even near 90 degrees at peak heating as the upper ridge intensifies. and a cold front nears the region, but the primary impacts will fall outside the short term period.
Rain will increase in coverage and intensity overnight tonight when an upper wave over Texas today heads towards the Ozarks and middle- Mississippi Valley and a weak low pressure center rides up the wavy surface front reaching from Texas to the Ohio Valley. High pressure ridging just off the southeast U. A cold front oriented parallel to this flow will drift slowly through the region in the next 36 hours. On Thursday, a couple of waves of low pressure riding along the front are expected to get it moving again, promising to shift the rain shield eastward by late Thursday evening. Light rains on radar now are not causing flooding issues, but this first wave on top of wet grounds should set the stage for flooding as those waves of low pressure tonight into Thursday bring their more intense rain rates.
High pressure will bring mostly sunny skies and above normal temperatures today and tomorrow.
1246 PM EDT Wed Mar 28 2018 High pressure is bringing quiet weather this morning. Clouds will increase from west by aftn and there may be light rain showers into the west ahead of approaching cold front. Since more open water has developed over western Lk Superior in the last couple days, increasing moisture up to H85-H8 and H85 temps of -14c will support at least isolated lake effect, especially in the higher terrain of the west and maybe the north central. A cold front moving through late today will bring MVFR conditions tonight at all sites. Strongest winds up to 30 kts are expected this weekend as low pressure system tracks across Upper Great Lakes.
Upper air analysis showed a broad longwave trough across North America. The remains of a closed low over the Desert Southwest was opening up and phasing into the base of the longwave trough. For today, the main trough axis will move slowly east over the central High Plains. A band of cirriform cloudiness streaming north over western Kansas early this morning will gradually shift eastward ahead of the upper trough. NAM and GFS model soundings as well as MOS guidance supports high temperatures in the lower to middle 60s. This system will push a cold front into west central Kansas late this afternoon and southeast across the forecast area tonight.
Aloft: A broad trof will settle over the rgn today and tonight. Its cold front was plunging S thru the Dakotas. Sct gusty shwrs will develop along and behind the cold front. Hazardous Weather Potential: - Some minor snow accum possible Sat night into Sun Aloft: The trof will linger over the Plns Thu then shift E into the GtLakes with svrl days of low-amplitude almost zonal WNW flow. A warm front will form and move thru Fri followed by a stronger cold front Sat. A warm front will form from NW-SE across Neb/KS Mon and remain quasi- stationary. Cold frontal passage around 18Z with increasing clds with sct gusty -SHRAs after 21Z.
Later tonight northwest winds will develop in the wake of the front brining cooler air across the region.
1021 AM EDT Wed Mar 28 2018 Hydro High pressure will provide dry weather today, but clouds will linger especially from Grand Rapids to the south and east. Rain will redevelop late tonight and continue Thursday as low pressure tracks through the Ohio Valley Region.
638 AM CDT Wed Mar 28 2018 Surface ridging has settled in over the area, and is expected to drop temperatures north of HWY 36 near freezing this morning. The trough over the southwestern U. Tonight, the upper level trough will move overhead, while the weak surface front passes through the forecast area.