Aikyam-Lab/Synoptic-Bench huggingface dataset:
306 PM MDT Mon Oct 24 2016 The 12Z U/A H5 hand analysis is verifying the deep trough that models have been advertising off the NOAM left coast. Temperatures will be cooler behind the trough by some 7 to 12 degrees but still ending up above normal. Dry and warm conditions move back in for the mid week period as the ridge rebounds back over the Intermountain West to the Canadian Rockies.
Temperatures look to be near or slightly above freezing overnight so no accumulations on roads is expected. Even if temperatures get down to freezing pavement temperatures should stay warm enough to prevent accumulation.
1141 AM CST Thu Nov 24 2016 A weak cold front is making its way across Middle Tennessee this morning.
A weak upper level trough is passing north of the area today with a weak surface front just to the west.
304 PM CST Thu Nov 24 2016 Another dry cold front is moving through the area this afternoon.
247 PM CST Thu Nov 24 2016 Upper trof continues to move east with returns mainly confined to east of the James valley. The 500mb trough overhead this afternoon will be across the Great Lakes region at the start of this period, as a ridge builds over our region. The ridge will remain across the central U.
245 PM CST Thu Nov 24 2016 Cold front entering northwest Oklahoma this afternoon.
Current surface analysis shows low over southern SK, with cold front over far eastern portions of MT and WY. Areas of fog will linger until the cold front crosses later this morning. Highs will mostly be in the low to mid 40s, with 30s over the higher Black Hills. A ridge builds across the region tonight into Friday with mostly clear skies and warmer temps.
A surface cold front will continue to slide southeast into the Southern Plains tonight with high pressure building into western Kansas. Winds shift back to more of a southerly direction tomorrow as a trough of low pressure develops across eastern Colorado. Lows tonight will range from the lower 20s across west central Kansas to low 30s across south central Kansas.
A trough to our west will slowly push east tonight, keeping southwest flow aloft.
Then RAP soundings are showing the low level profiles moistening back up beneath 850mb overnight. This is part due to the area of low clouds currently over Nebraska and northern Kansas ahead of a upper trough moving across the northern Plains. This trough will move across the Midwest bringing the moisture with it. Went warmer than MOS guidance in most locations.
Another stronger cold front will cross the commonwealth late Friday and Friday night bringing colder air on a gusty northwest wind.
448 PM EST Thu Nov 24 2016 A weak area of low pressure will push out to sea south on New England tonight. Another weak area of low pressure will approach from the west on Friday and will shift into the region Friday night.
345 PM CST Thu Nov 24 2016 Through Friday: Zonal flow is sending mild Pacific air across the Lower MS Valley region this Thanksgiving Day. Otherwise, high pressure is resulting in light wind and dry weather as we go through tonight and Friday. A slightly cooler push of air into the region late Friday should keep readings a little lower than today.
957 AM MST Thu Nov 24 2016 Current surface analysis shows low over southern SK, with cold front over far eastern portions of MT and WY. Areas of fog will linger until the cold front crosses later this morning. Highs will mostly be in the low to mid 40s, with 30s over the higher Black Hills. A ridge builds across the region tonight into Friday with mostly clear skies and warmer temps.
1127 AM CST Thu Nov 24 2016 A pacific cold front is entering Western Nebraska. The freezing fog advisory has been converted to a dense fog advisory and expanded west through Chase county until 15z. The 200 foot ceiling likely represents 1/4 mile or less visibility in the highlands north and south of town. A pacific cold front moving through cntl WY will sweep east into the Neb Panhandle this morning and scour out the arctic air and clouds across ncntl Neb this afternoon. The dense freezing fog this morning is forming mainly on the wrn fringe of the arctic drape. Temperatures will gradually warm above freezing this morning reducing the hazard. The freezing fog advisory operates until 12z and will be reevaluated at that time for a possible extension or down-grade to a dense fog advisory.
Climatologically mild day then in store for Friday as upper ridge builds into the Central Plains. Well advertised western trough to become the dominant weather feature during this time frame.
155 PM EST Thu Nov 24 2016 Aviation A weak area of low pressure centered over Michigan will track slowly east through Friday night.
wet conditions will continue for the lowlands of Eastern Washington and North Idaho. Low pressure offshore is creating gusty southeasterly winds over the Basin and Cascades.
Warmer day for Friday as 700mb temperatures climb back above freezing.
A large upper level trough remains off the coast, moving ever so slowly east.
This is all due to a weak cold front which will move through overnight and early tomorrow morning. ISOLD to SCT SHRA develop over the Edwards Plateau and Rio Grande Plains this evening and spread to the remainder of South Central Texas overnight into Friday as isentropic lift increases due to a weak cold front passing through our area. A weak and shallow cold front is expected to push across the area later tonight into Friday. The shower and thunderstorm activity could begin ahead of the arrival of the frontal boundary where the higher values of relative humidity resides coupled with best lift.
Upper trough now into the Upper Ohio River Valley as a surface cold front is crossing our region.
1147 AM CST Thu Nov 24 2016 Surface analysis this morning had the low pressure system that gave the area a wintry mix now over lower MI while a ridge of high pressure was building in from MN/IA. Lots of stratus in place across the region in the wake of the low. Ridge of high pressure will drift across the area today, but stratus will be trapped under the subsidence inversion. Look for highs in the middle 30s to the lower 40s. Attention then turns to an incoming mid-level trough for tonight which looks to give the area some light snow. Decreasing clouds expected for Friday night as a ridge of high pressure moves across the region.
Deeper moisture does manage to move toward the area on Friday night as upper troughing dives down toward the area. A compact vort maxima traverses the lower lakes and manages to send a moderately strong cold front through the area Friday night. As northwesterly flow increases and unstable lapse rates deepen toward the lower end of the dendritic growth layer concurrently with the surface layer cooling very close to freezing, rain showers may turn to snow showers north of I-80 for a time. In other news, as northwesterly upslope flow moves into the ridges with the frontal passage, temperatures will likely drop off toward or below freezing. Model soundings indicate a much shallower moist layer in the ridges such that glaciation of the cloud layer will be more difficult than north of I-80.
Gilchrist Previous discussion: Cold front pushing across the region this morning. Clearing skies expected during the afternoon with the upper trof swinging into the northern plains. Upper ridge then builds across the state for continued dry and mild weather through the holiday weekend. Synoptic Setup: Long range begins with a ridge over the Great Plains with a trough over far western CONUS and Canada. Behind the western Trough is another Ridge/trough couplet over the Gulf of Alaska.
325 PM CST Thu Nov 24 2016 A mid and upper level trough over the Plains continues its eastward progression. Current position of the cold front stretches from eastern Nebraska to Salina to Hutchinson and Medicine Lodge; this front will keep moving southeast through the evening.
Upper ridging builds in this weekend in advance of the next upper trough moving into the West.
For the remainder of the afternoon and into the evening hours, skies will be partly cloudy with breezy easterly winds, as the region remains under a fairly tight pressure gradient with high pressure slowly shifting eastward across the western Atlantic to the north. The high pressure to the north will weaken and give way to a weakening cold front associated with an upper-level trough swinging through the Great Lakes and Northeast.
Friday, high pressure will move out of the Rockies and into the Southern Plains.
On the surface a weak ridge of high pressure extends from the Atlantic across Florida. will move to the east and bring a cold front with it into Florida late Friday.
generally about a half inch but under 1 inch with the higher totals hugging the IA/MN border north of Highway 18. the another weaker upper level trough will still remain over western Iowa and will pass east during the day. Highs will be cooler over the east and remain near 40 east to the mid to upper 40s in the south central and south.
332 PM EST Thu Nov 24 2016 A weak area of low pressure will track from the western Great Lakes into Southern Ontario tonight.
Tonight's temperatures predicted to run a few degs F above normal for the date with mostly low/mid 20s on the plains and single digits and teens in the high country. as temperature aloft warm should see sfc temperatures increase by 5-9 degs F with mid to upper 50s at lower elevations and mostly 40s in the high country.
1118 AM CST Thu Nov 24 2016 Concerns: Cold front and wind shift tonight, low potential for showers. South winds at 5-10 kts have resumed in advance of an approaching cold front currently positioned through the TX Panhandle. As it does, a cold front will move down the Plains approaching the northwestern part of the forecast area after sunset and sweeping through the southeast before dawn Friday. Moisture will be limited but there will be a slight chance of showers after midnight tonight southwest of a Breckenridge to Cameron line. Lows will range from the upper 30s northwest to the lower 50s southeast. Some low rain chances will linger into Friday morning south of a Breckenridge to Centerville line.
219 PM CST Thu Nov 24 2016 A cold front with shallow cool/cold air will continue to push across Oklahoma and western north Texas through the evening hours.
247 PM CST Thu Nov 24 2016 Early afternoon water vapor imagery and mosaic radar data indicate a mid-level vorticity maximum over eastern South Dakota, a secondary perturbation over western South Dakota, and a trough axis trailing southwest into the central High Plains.
Not expecting accumulation since forecast lows are near to above freezing and if precip does occur it should be very light. Forecast highs are slightly warmer than today, in the lower to middle 40s. This is due to a broad upper ridge setting up over the Midwest, while a deep western trof develops.
Cloudy skies will continue well into Friday night but dry conditions expected as high pressure builds in.
The low clouds will fill back in and will remain over the Mid-South through at least the early afternoon hours on Friday. As a result, will keep lows warmer than guidance is showing tonight and will lower highs on Friday. High Pressure will build into the area for the weekend.
155 PM EST Thu Nov 24 2016 Warm air will overspread the area this afternoon through Friday, followed by a cold front passage Friday night with cooler and dry air for the weekend. Remainder of the afternoon: Subsidence drying in the wake of the exiting trough will allow for increasing intervals of sunshine by the afternoon. Highs in the lower to mid 60s north to lower 70s. The next mid/upper level short wave trough will push through the region late Friday through Friday night. The main cold front is now expected to push through on Friday night.
Breezy northwest winds are also present, behind a cold front that pushed through early this morning.
Weak troughing across the Great Lakes region with a subsequent front draped down through the Tennessee River Valley will become washed out through the evening. Another deepening and progressive trough currently situated over the Rockies will eject into the northeast helping to swing a more defined front through the region later Friday with drier/cooler air filtering in by Friday evening. High pressure behind the front, centered across the Ozarks will help bring north flow, cooler and drier conditions to start off the weekend.
This should help to keep clouds around through Friday as a mid level trough over the Plains approaches and then passes through Wisconsin. Have included snow and/or rain chances associated with the approaching trough. Friday Night Through Thursday The weekend should be fairly quiet as a ridge of high pressure traverses the western Great Lakes.
A cold front is expected to push thru mainly aft 06Z tonight. The low clouds could graze the NE OK sites with KBVO having the best chance. Variable restricted flight conditions in fog/freezing fog over other sites will also improve by late morning. A weak cold front will move through nern OK sites around 03z and through MLC/FSM after 06z. In addition to the dense fog potential, a couple of sites have briefly reported freezing fog, and as such, will include a patchy mention of freezing fog generally from Claremore to Tahlequah to Sallisaw. A fairly fast moving, dry cold front will push through the region tonight, with a brief decrease in temperatures following on Friday.
A cold front will move through the region this afternoon producing little more than a wind shift. /issued 256 AM CST Thu Nov 24 2016/ With progressive flow across the CONUS bringing the interface between a ridge to the east and a short wave trough crossing the Rockies, the South Plains will see southwest to west winds today, although speeds will remain fairly modest. A slight increase in progged thicknesses from yesterday afternoon and the slight downslope component to the low level flow points to highs about 6-8 degrees warmer, in line with objective guidance. However, with the aforementioned upper trough moving across the central plains this afternoon, a cold front will move into the northern part of the forecast area, moderating temperatures slightly there.
313 PM CST Thu Nov 24 2016 A mid and upper level trough over the Plains continues its eastward progression. Current position of the cold front stretches from eastern Nebraska to Salina to Hutchinson and Medicine Lodge; this front will keep moving southeast through the evening.
On Friday winds slowly back to the south and southwest at speeds in the 15 to 25 mph range with higher gusts as pressure gradient slowly increases between departing high pressure to our southeast and developing low pressure along the front range.
301 PM EST Thu Nov 24 2016 Pretty messy in the short term as snow, drizzle, freezing drizzle and rain are all in the forecast. Dry air in the DGZ complicates things further, adding the drizzle/freezing drizzle aspect. Precip will be mostly drizzle (possibly some freezing drizzle late over the interior W) and closer to Lake Superior and the E through this evening. Precip will then turn back to drizzle/freezing drizzle over the W late Fri as dry air moves back in. Upper trough over the Great Lakes will begin to shift east on Friday. As mid level support and moisture departs Friday evening any precipitation will likely end as drizzle or freezing drizzle.
Mesoscale models continue to push the low cloud cover over northern Mississippi and Arkansas into northern Alabama this evening. Between cloud cover, the higher dewpoints, and almost stationary front - Expect lows to drop only into the mid to upper 40s in most locations.
The Pacific cold front is currently working through eastern portions of the forecast area. A blend of the bias corrected data with the previous forecast indicates lows will bottom out in the lower to mid 20s for most locations, but across our northwestern zones, upper teens appear likely.
wet conditions will continue for the lowlands of Eastern Washington and North Idaho.
312 PM EST Thu Nov 24 2016 Warm air will overspread the area this afternoon through Friday, followed by a cold front passage Friday night with cooler and dry air for the weekend. Remainder of the afternoon: Subsidence drying in the wake of the exiting trough will allow for increasing intervals of sunshine by the afternoon. Highs in the lower to mid 60s north to lower 70s.
A trough is present both to the east and west of this ridge with one across the Northeastern U. This boundary has slowed since the ridge has build into the region. Dewpoints are currently in the low to mid 50s and expect low dewpoint depressions overnight. The surface boundary should push through the forecast area late tonight into early tomorrow morning as an upper level trough moves across the Central Plains into the Great Lakes. High pressure builds into the region in the wake of the frontal passage. Although a deeper trough digs over the northern Ohio Valley dry conditions will persist.
211 PM EST Thu Nov 24 2016 An area of low pressure over the eastern Great Lakes and leading warm front will push east, northeastward today. 500mb trough continues to progress towards the North Country from the west. Expect areas that warm above 32F to still see flurries, possibly mixing with DZ/--RA as above freezing temperatures generally at or near the surface heading into the early evening. Thus, after midnight, could also see some freezing drizzle as the predominant p-type, especially east of the Greens where subfreezing temps are likely to hold in place.
405 PM EST Thu Nov 24 2016 Warm air will overspread the area this afternoon through Friday, followed by a cold front passage Friday night with cooler and dry air for the weekend. Remainder of the afternoon: Subsidence drying in the wake of the exiting trough will allow for increasing intervals of sunshine by the afternoon. Highs in the lower to mid 60s north to lower 70s.
The cold frontal boundary will scour the low clouds and moisture to the east, and a period of gusty winds are expected late this afternoon across our western zones in deeper post frontal mixing. Temperatures will be noticeable colder overnight with lows mainly in the 20s once the low clouds depart. Friday is shaping up to be a much nicer day with rising heights/ridging building across our region.
Weak upper level ridging will move across the region. At the surface, a trough approaching our western zones is forecast to stall. Lows will be in the lower to mid 50s.
140 PM EST Thu Nov 24 2016 A low pressure system will move to the east today allowing precipitation to come to an end across the region. Surface cold front bisecting Ohio, pushing east through ILN/s eastern counties.
119 PM CST Thu Nov 24 2016 Snow tapering off southeast as an embedded mid level trough continues east. an upper level trough extended from Alberta across eastern MT and WY. However in eastern ND, winds were northeasterly in response to the departing low pressure system over the Great Lakes. and there is a threat of light freezing drizzle.
The stratus layer should persist for northern Missouri, though rapid clearing over areas south of the I- 70 corridor will help to push afternoon high temperatures into the lower 50s for the southern half of the CWA. Areas with greater cold air advection and early clearing of cloud cover will hover near or just below the freezing mark, generally west of the I-35 corridor.
1003 AM CST Thu Nov 24 2016 Clear skies today will see temperatures climb into the lower 70s. High pressure is the dominant weather feature today through the weekend.
Tonight Through Friday High pressure will be over western and central Wyoming tonight with clearing skies. Friday morning southwest flow aloft will move in ahead of a Pacific low pressure trough with windy conditions forming along and near the east slopes of the mountains and through the wind corridor across Sweetwater.
With the ridge overhead at the moment, there are some doubts that this clearing will make it all the way over here, as LAPS soundings still show a decent inversion around 900 mb and RAP 925 mb humidity plots are pretty solid through the night. With a bit of sunshine, temperatures should get a little warmer on Friday, mainly mid to upper 40s with some 50 degree readings over the far southwest and southeast parts of the CWA. As this high pressure moves east into the southeastern US, a strong weather system developing in the western plains will move out into the plains and move northeast into the northern plains.
wet conditions will continue for the lowlands of Eastern Washington and North Idaho. The low-level southeasterly winds are also bringing in drier air, which are potentially helping to evaporate any light rain.
Convective depth will be limited to about 850 mb due to mid level subsidence associated with the short wave ridge while the boundary layer remains nearly saturated. The next low pressure system will be on our doorstep late Friday morning with associated precipitation moving in during the afternoon. Partial thickness in the 1000/850 and 850/700 mb layers support snow as precipitation type while model soundings indicate the above freezing portion of the boundary layer remaining about 1000 ft deep, deep enough for all rain given the light precip rate expected and as afternoon highs struggle to reach into the lower 40s. Gulf moisture will remain cut off by weak but expansive high pressure extending from south Texas to the SE Atlantic coast.
1223 PM EST Thu Nov 24 2016 A weak cold front is located just to the east of the area.
A few patches of fog will again be possible tonight, and the low clouds could even squeeze out some patchy drizzle from the Blue Grass to the Lake Cumberland region after midnight.
A weak low cold front will brush Arizona today with cooler temperatures and breezy northeast winds today.
321 PM EST Thu Nov 24 2016 A weak area of low pressure will push out to sea south on New England tonight. Another weak area of low pressure will approach from the west on Friday and will shift into the region Friday night.
Updated forecast to cancel Freezing Fog Advisory and issue Dense Fog Advisory. Latest obs showing temps for the most part above freezing. There still could be a few isolated spots below freezing for the next hour or so. but overall trend is go above freezing as morning progresses.
With more sun across the western FA Friday, went with slightly warmer highs there.
147 PM MST Thu Nov 24 2016 Water vapor shows short wave trof moving thorugh the wrn Dakotas with clear skies across MT/WY. After a cold night tonight, upper ridge will rebuild into the nrn plains for Friday, resulting in dry wx and warmer temps.
Dry conditions continue to be expected from tonight thru Sun as sfc riding influences from the Rockies build across our region and upper level ridging dynamics build across our region.
303 PM EST Tue Feb 14 2017 Low pressure to the south tonight. Cold front late tonight into Wednesday.
Expect rain to end rather quickly from West to East after midnight as a positively tilted longwave trough shifts into Middle Tennessee and Northwest Alabama.
941 AM MST Tue Feb 14 2017 Slow moving upper ridge will continue to affect the region today and Wednesday. Warmer temperatures are then expected Wednesday with highs in the 50s to low/mid 60s. Mild and dry weather will continue through the week, as the upper ridge slowly transitions eastward.
A cold front will move through the area late this evening and overnight. This will lead to some gusts up to 20kts and much cooler air throughout the area for Wednesday.
Strong cold front will move through in the wake of the large precipitation field with winds becoming northwesterly with gusts upwards of 22kts for a brief period this evening. The warm front is gusting into central LA with mid to upper 60s and lower 60 dew points.
Night time lows will fall into the lower 40s. This low exiting stage right will make rain end from west to east during the course of the morning. Cloud cover should also move eastward with the low, with the sun returning from west to east Wednesday afternoon.
Warm up begins tomorrow as ridge axis shifts east allowing for return flow and respectable warm advection.