Aikyam-Lab/Synoptic-Bench huggingface dataset:
332 PM CDT Sun Apr 1 2018 A bit warmer airmass over the area this aftn/eve as aftn temps have reached the 20s to around 30. Coldest temps tonight NW MN and parts of the DVL basin where high pressure and dry airmass will hold the longest. In this area temps will fall back into the lower single digits. 12Z Tue - 00Z Thu Upper level trough was located over the southern BC coast. Thu - Sun Longwave trough over southern Hudson Bay will move to eastern Canada and weaken. Low amplitude longwave ridge builds over western North America through the period. Cold front is expected to move through the area Thu as a short wave rotates around northern stream.
At the Surface, the coastal trough between the Gulf Stream and the coast will break down overnight with high pressure ridging across the entire area by Monday afternoon. Fog will then advect inland at least as far as Trail Ridge and into parts of the Suwannee Valley by midnight.
325 PM CDT Sun Apr 1 2018 Tonight and Monday: A cold front continues to stall out as it creeps southward into the Delta, now extending from Pine Bluff AR to Clarksdale to Corinth. The front will stall across the ArkLaMiss Delta overnight, bringing an increase in low cloudiness and perhaps a shower to the far northwest corner of the area, before lifting northward again Monday as a warm front. With warm southerly flow continuing tomorrow, another warm day is anticipated with highs again above normal reaching the low 80s over a good chunk of the area.
Skies were mainly cloudy with temps varying from around 50 along the KY line to the lower 70s along the AL line. Like this morning, our far southern counties will have the lowest chances for rainfall.
Currently near zonal flow continues aloft, with high pressure at the lower/mid levels shifting east. This will begin to transition us to increased southerly flow and moisture at the lower levels to start the week.
232 PM MDT Sun Apr 1 2018 Today on the plains ended up on the cooler side due to a stronger inversion than forecasted. This will allow for warmer and drier conditions overnight and into Monday, along with the start of some downsloping winds. The lee-side trough will deepen significantly Monday along the urban corridor in the morning then push out east in the afternoon. Much warmer surface temperatures, readings in the 70s across the plains and 40s to upper 50s for the mountains will create dry adiabatic sounding allowing for the strengthening winds aloft to mix down easier, mixing with the surface gradient winds.
207 PM EDT Sun Apr 1 2018 Weak high pressure will bring a cool Easter Sunday to the region.
431 PM EDT Sun Apr 1 2018 High pressure returns for today and Monday, should be quite pleasant even as temperatures trend below normal.
Accumulating snow is likely between midnight and sunrise with the highest amounts across a band where the northern edge of greatest 700/850mb fronogenesis is overlaid by positive pressure advection at PV1.
242 PM EDT Sun Apr 1 2018 A cold front will approach from the northwest tonight then move south through the area Monday.
This warming trend will continue into Monday with highs in the low 80s for all locations except along the coastal regions which are still being influenced by cooler waters. Surging gulf moisture combined with max temps in the lower 80s may be able to provide just enough buoyancy to spark off a few showers Monday afternoon.
/DL/ A cold front is sagging southward through the Mid South this morning and currently extends from just south of LIT to near CKM to BNA. On the surface a cold front was slowly approaching from the northwest. The weak cold front will stall across the northwest delta by late today into tonight as upper support weakens.
A fast moving cold front will cross northern and central Utah Monday, with mild temperatures returning by midweek.
246 PM CDT Sun Apr 1 2018 The weak cold front that has been stalled just to our north will keep cloud cover in place and force a lingering isolated POP to remain in the forecast. The weak cold front will sink into the forecast area early monday morning without much fanfare, just the possibility of a light shower, an increase in cloud cover and a windshift. Afternoon temps will reach the low to mid 70s.
223 PM MDT Sun Apr 1 2018 This week's progressive pattern begins with a low pressure system churning over southern BC this evening. The trough moves east through Montana through Monday evening while the Arctic low pushes south. Temperature profiles suggest the possibility of rain/freezing rain at times.
Freezing temperatures continue to be observed in many locations northwest of I-44 and with a bit more cooling anticipated through the night have issued a Freeze Warning for much of NE OK and into Benton County AR for tonight. Will continue to see very weak isentropic lift tonight above the shallow cold air, but it appears this influence will shift southeast with time and thus any precip that falls in areas seeing temps below freezing would be in the form of patchy light freezing drizzle. Temperatures will slowly climb Monday and should finally warm back above freezing by late Monday morning. Temperatures will then continue to rise Monday night as stronger warm advection commences ahead of the next upper system and cold front.
The northern periphery of a deep and warm core anticyclone centered off of the Southern Mexican Pacific Coast, bulges northwards into the Southern Plains and Lower Mississippi River Valley, including much of the Gulf of Mexico. At the surface and in the lower to middle levels(Surface to 700 mb), latest land and marine surface observations and analysis as of 200 pm detail a 1025 mb ridge axis oriented along the Carolina Piedmont. Temperatures over the islands have reached the lower 80s with dewpoints in the upper 60s.
Prolonged, Significant Rainfall Event Possible Late this Light to moderate snow showers have begun across north-central Idaho and northwest/west-central Montana this afternoon ahead of the Pacific cold front progged to move through overnight. West and south wind gusts are increasing in the warmer locations of central Idaho and southwest Montana today, and gusty west winds with increasing rain/snow coverage can be expected tonight associated with the Pacific front itself. By the early Monday morning hours, a secondary (Canadian) cold front will drop down the Continental Divide and into northwest Montana. This will initiate gusty north and east winds in this region, and also enhance additional snow showers as both cold fronts track southward.
With clouds decreasing across the forecast area this afternoon, light winds expected through the night and some fresh snow, temperatures tonight could get a little cooler. Have lowered temperatures in the area with the highest snowfall amounts overnight and this morning.
By Monday afternoon, the next strong low pressure system will slide across the central Plains. Ahead of the low, WAA will slide into the U. High temperatures Monday will be in the low to mid 30s.
/issued 1000 AM EDT Sun Apr 1 2018/ A stationary front over South Florida will slowly dissipate today allowing high pressure to start to build into the area from the Western Atlantic Waters tonight. Therefore, the pops have been adjusted a little bit for this afternoon across South Florida with the highest pops over the western interior areas.
the result of a nearly stalled out cold front near I-40. Winds north of the front were breezy from the northeast providing for windchills down near freezing. but cooler 50s will hang on across the far north.
The most recent RAP analysis and water vapor imagery shows the remnants of the upper level trough oriented SW-NE across south Florida and western Cuba. This will aid in unseasonably warm temperatures over the next couple of days with widespread mid-upper 80s and slightly cooler near the coast.
/issued 417 AM CDT Sun Apr 1 2018/ Looking at a complicated temperature forecast this Easter as each weather model offers a different solution as to where a cold front will settle. Low clouds and much cooler temperatures will fill in tonight behind the front which will likely only make it to the Pecos River. A weak upper level trough will move east across northern Mexico early this week.
It will take time to saturate the low layers, but we could see a few sprinkles/sleet pellets along and northwest of a line from Lone Rock to Fond du Lac late Monday afternoon, otherwise expect a dry day.
222 PM MDT Sun Apr 1 2018 Weak upper ridging within deep northwest flow continues across the northern Great Plains. Snow will spread southeastward late Monday into Monday night as a strong cold front pushes through. There is high confidence that the northern half of the CWA will see the higher accumulations, but there is still uncertainty as to how much snow will accumulate Monday and Monday night.
On Monday, a cold front over Idaho and Montana will start dropping southward. Before this arrives however the Hudson Bay Vortex will be blocking the high latitudes. There is also a weak tap of moisture ahead of it which will bring snow showers to the high country as the cold front swings through Monday evening.
327 PM EDT Sun Apr 1 2018 REST OF TODAY AND TONIGHT: The stationary front across the region is slowly washing out and high pressure will begin to build over the western Atlantic waters tonight. SHORT TERM: High pressure will build in across the region for the start of the week with an easterly breeze. Highs will mainly be in the low to mid 80s and lows in the 60s, except the east coast metro region will be around 70.
The frontal zone will also create a big temperature contrast, with highs ranging form the lower 50s along the KY border, to around 70 at the AL border. Brief break in rain anticipated this evening at all airports before cold front surges south with more showers and MVFR/IFR vis/cigs overnight.
257 PM CDT Sun Apr 1 2018 The cold front that moved into the area overnight has made it south into the the Concho Valley and Heartland areas, resulting in a relatively tight north to south temperature gradient across the central portions of our CWA, and tricky forecast over the next 24 hours. Temperatures north of I-20 range from the mid 40s to near 60 degrees, with temperatures along the I-10 corridor in the lower 80s. South of the front along the I-10 corridor, temperatures should only drop into the lower 60s. However, the NAM holds on to more clouds and keeps temperatures cooler than the GFS/ECMWF.
The weak cold front that has been stalled just to our north will keep cloud cover in place and force a lingering isolated POP to remain in the forecast. The weak cold front will sink into the forecast area early monday morning without much fanfare, just the possibility of a light shower, an increase in cloud cover and a windshift. Afternoon temps will reach the low to mid 70s.
402 PM CDT Sun Apr 1 2018 At 20z, a cold front was located from near KAFW, to south of KF00, to near Cloudy OK, to just north of KMEZ, and eastward into Central Arkansas. Rain chances should decrease Monday afternoon and evening as the frontal boundary lifts back to the north as a warm front. By late Monday, rapid lee surface cyclogenesis will commence as an upper trough moves east from the Pacific Northwest into the Northern Plains. At the same time, a cut off trough currently over the Eastern Pacific will open and merge with the southern stream of the westerlies and move east along the U.
1030 AM PDT Sun Apr 1 2018 A vigorous low pressure system will bring rain and snow to the Idaho Panhandle and the Cascades today into Monday.
/issued 257 PM CDT Sun Apr 1 2018/ The cold front that moved into the area overnight has made it south into the the Concho Valley and Heartland areas, resulting in a relatively tight north to south temperature gradient across the central portions of our CWA, and tricky forecast over the next 24 hours. Temperatures north of I-20 range from the mid 40s to near 60 degrees, with temperatures along the I-10 corridor in the lower 80s. South of the front along the I-10 corridor, temperatures should only drop into the lower 60s. However, the NAM holds on to more clouds and keeps temperatures cooler than the GFS/ECMWF.
Temperatures will be slightly cooler early this week, but still above normal for early April as a couple weak troughs move across the region.
1234 PM CDT Sun Apr 1 2018 Today will be mostly sunny, but quite chilly as high pressure drifts across the region.
Accumulating snow is likely between midnight and sunrise with the highest amounts projected in a band where mid level frontogenesis results from divergence via a jet couplet. No changes to headlines for the eve issuance, with focus for warning level accumulation over the higher terrain. Decreasing cloud coverage but chilly conditions expected Monday with building high pressure.
It will continue to be dry, warmer than average, and with a cloudy/clear mix. Low temperatures tonight will be mainly in the lower 70s. On Monday, strong Gulf high pressure will interact with a deepening Plains storm system, which will produce a tighter pressure gradient and stronger southeast winds. Monday high temperatures inland will reach the lower 90s while coastal temperatures will be in the 80s. Southeast winds will drop down to moderate Monday night with low temperatures again mainly in the lower 70s under partly to mostly cloudy skies.
316 PM PDT Sun Apr 1 2018 High pressure will provide for mainly clear skies and above normal temperatures across the area through the middle of the week.
Satellite imagery shows the upper low and cold front moving along the southern BC coast this morning approaching the Pacific northwest. With the low and cold front moving closer precipitation will increase in coverage especially along the Cascades and northeast Oregon mountains. Morning soundings showed a freezing level of 6k at Salem and 3k at Quillayute so snow levels will be fairly high for much of today and then decrease rapidly overnight with the strong cold advection. As the upper low moves across Washington tonight expect this will result in the best chance of rain and snow across the region. Significant snow accumulations are possible over the mountains with the highest amounts in the Cascades and Blues. A strong low and associated cold front will move into the region from the northwest today.
MVFR CIGS will begin to push north into southern Wisconsin Monday evening, ahead of an approaching low pressure system. It will take time to saturate the low layers, but we could see a few sprinkles/sleet pellets along and northwest of a line from Lone Rock to Fond du Lac late Monday afternoon, otherwise expect a dry day.
Should see more sleet and snow along and north of the Highway corridor where up to an inch of accumulation will be possible. With temperatures ranging from the upper 20s to near freezing there will some travel impacts especially across central Missouri where temperatures are coldest.
135 PM EDT Sun Apr 1 2018 High pressure will remain across the region today.
205 PM CDT Sun Apr 1 2018 A cold front was bi-secting the CWFA today generally along/near the Pecos River, to w of the front temps are mostly in the 80s and e/n of the front temps in 60s-70s. 85h temps around 24C easily support M80s and ATTP we prefer the warmer ECMWF guidance in the U80s for SE NM/PB. Another cold front will surge across the plains Tue AM arriving along the I-20 corridor before 18Z. As such Tue will be noticeably cooler 70s/80s s of the Pecos River and 60s to the n) and even cold Wed AM, mid 30s-40 fairly widespread. Much warmer Thur/Fri with nw flow aloft. Fuel dryness is rebounding pretty quickly across these wrn areas with RFTI forecast to be up to around 4-6 and the fire-effective low-level thermal ridge will be in place.
257 PM CDT Sun Apr 1 2018 High pressure remains in place over the Northland tonight into Monday. Quiet, but breezy, conditions will continue this afternoon and evening as high pressure ridging remains the primary weather influence across the Northland. An area of low pressure will move from the Rockies tonight into eastern Wyoming on Monday.
356 PM CDT Sun Apr 1 2018 Temperatures, at or just below freezing for some, drizzle and perhaps some freezing drizzle, and wind are the main forecast concerns. Any freezing drizzle that does occur should be light and result in limited impacts. With areas reaching subfreezing temperatures being at or just after their climatological last freeze date, and with temperatures at or below 28F being unlikely, we decided not to issue a Freeze Warning at this time. Where temperatures were at or below freezing we included "drizzle or freezing drizzle". Warm surface temperatures and temperatures not substantially below freezing should limit impacts. Some bridges and overpasses could become slick though.
108 PM PDT Sun Apr 1 2018 A low pressure trough off the coast will drift inland through Monday, deepening the marine layer, and spreading clouds and cooling well inland across the valleys and onto the lower coastal slopes.
1031 PM EST Wed Nov 22 2017 High pressure will build into the area and last through the weekend.
One caveat to keep an eye on tonight will be the potential for some freezing drizzle. If some freezing drizzle does develop, it should be brief.
High pressure will remain in place through the rest of the week.
420 PM MST Wed Nov 22 2017 Residual mid and high level moisture rotating on the eastern edge of the ridge of high pressure has allowed thicker cloud cover to persist across the northern portion of our forecast area this afternoon.
842 PM CST Wed Nov 22 2017 The area of high pressure that brought the chilly temperatures to the area today was shifting off to our east early this evening. The combination of the cloud cover and southerly winds overnight should help to keep our overnight lows from reaching the lows we saw over the area this morning. High pressure will be departing the area this evening, followed by a weak short wave trough approaching from the northern Plains. The short wave will be rather rather moisture starved in the low levels, so only an area of mid/high level clouds will move across tonight.
Conditions also appear favorable for the development of patchy freezing fog in the larger valleys of northeast AL/southern TN, and this has been included in weather grids between 08-13Z. Thanksgiving day should be fairly pleasant, though on the cooler side, as high pressure persists across the region.
High pressure will be departing the area this evening, followed by a weak short wave trough approaching from the northern Plains. The short wave will be rather rather moisture starved in the low levels, so only an area of mid/high level clouds will move across tonight.
As an elongated ridge of high pressure at the surface builds in, winds will remain L/V.
A weak cold front will move through the area tonight.
1044 PM EST Wed Nov 22 2017 High pressure will build into the area and last through the weekend.
/issued 222 PM CST Wed Nov 22 2017/ High pressure will build into the region tonight and dominate our weather through Thanksgiving. Tonight is expected to be one of the coldest nights of the season given dew points in the lower to middle 20s, calm winds and clear skies.
A weak area of low pressure located over north central South Dakota/south central North Dakota will continue to propagate southeast through the evening into Minnesota tonight. This will be followed by a small area of high pressure. Under this high, winds go light and while we have mild air already in place, we also have higher than average dewpoints. Mixed temperatures from 900mb in the James valley are into the low 60s, and 850mb are closer to 70s our west. The pattern has, overall, favored a positive PNA patter with west conus ridge and east conus trof.
High pressure will continue to strengthen over Arizona through this Holiday weekend.
1025 PM EST Wed Nov 22 2017 High pressure in the southern Ohio Valley will move east late tonight and Thursday.
Temperatures should range from the lower to mid 30s well inland to the mid to upper 40s at the coast. /ISSUED 348 PM CST Wed Nov 22 2017/ Few cirrus clouds streaming in from the north in the wake of the cold front that passed through early this morning. High pressure will continue to build in from the NW through Thursday which will keep offshore flow through the rest of the workweek.
937 PM CST Wed Nov 22 2017 Cold high pressure is settling over the region with clear skies and light winds. /issued 222 PM CST Wed Nov 22 2017/ High pressure will build into the region tonight and dominate our weather through Thanksgiving. Tonight is expected to be one of the coldest nights of the season given dew points in the lower to middle 20s, calm winds and clear skies.
By daybreak on Thanksgiving, weak cold front to wash out, so do not expect any precipitation for the Thanksgiving holiday. This combined with sunny skies will allow temperatures to warm up into the low to mid 50s.
703 PM EST Wed Nov 22 2017 High pressure will build into the area and last through the weekend.
511 PM CST Wed Nov 22 2017 1242 PM CST High pressure will move east of the area tonight with light southerly winds developing.
Mid-level trough should be moving out of area by morning, setting the stage for a dry and milder Thanksgiving Day. Ratzer 1242 PM CST High pressure will move east of the area tonight with light southerly winds developing.
642 PM EST Wed Nov 22 2017 High pressure in the southern Ohio Valley will move east late tonight and Thursday.
The 19-20 UTC RAP/HRRR favor the potential development of fog across central North Dakota on the cool side of the low level baroclinic zone.
Northeast Montana remains on the stationary boundary between the cold air low of Hudson Bay and an upper high and warm air parked over the Baja. Tonight the ridge axis shifts farther east, and all winds on the profile become westerly. Templer Previous discussion: Surface analysis shows a cold front across the northeast zones and drifting south this afternoon. This airmass overriding the cooler air at the surface looks to create fog or low clouds over the northern and some central zones.
Southerly winds will return overnight as the high pressure shifts east of the region. This should keep result in warmer low temperatures than those seen this morning. However, given the low dew points currently across the area and the likelihood of at least a few hours of light winds tonight, have trended toward the colder side of guidance, which is below the blended values in most spots.
The 4 miles and haze when the highest reflectivity passed over Boscobel KOVS may mean some very light snow did reach the ground. A trough will approach from the west tonight, pushing across southern Wisconsin in the morning. The 4 miles and haze when the highest reflectivity passed over Boscobel KOVS at 2353Z may mean some very light snow did reach the ground. Cross-sections show the lowest 7kft is quite dry during the best forcing, with saturation lowering to a min of about 5kft toward sunrise.
455 PM MST Wed Nov 22 2017 Quiet weather overnight through Thanksgiving Day with unseasonably warm temperatures as a large upper ridge holds just west of the Rocky mtn chain.
Ridge west/Trof east pattern will be flattening to a more zonal westerly pattern as we finish out this Thanksgiving Holiday week.
551 PM EST Wed Nov 22 2017 An upper trough axis is passing east of the region at this time.
Latest water vapor imagery shows a fairly amplified upper ridge over much of the western CONUS, with a trough over the eastern CONUS. At the surface, high pressure continues to build southeastward into the region, with northerly flow across the area. Under this dome of high pressure, clear skies are expected to persist across the TN Valley through the remainder of the day and into the overnight hours. Thanksgiving day should be fairly pleasant, though on the cooler side, as high pressure persists across the region.