Aikyam-Lab/Synoptic-Bench huggingface dataset:
449 PM MDT WED AUG 31 2016 High pressure centered over the Central Rockies will be shifting east tonight as a Pacific trough moves onshore. A few weak showers and thunderstorms will persist this evening over the higher mountains with one or two drifting over the valleys. As the trough moves inland on Thursday, moisture will be drawn northward across southwest Colorado and eventually up into the central zones by late in the day. Diurnal heating and slight increase in speed sheer, as winds aloft strengthen with the approaching trough, will be enough to kick off at least scattered showers and thunderstorms. Showers and thunderstorms remain in the picture through the night Thursday night as the trough moves into the Great Basin and moisture continues lifting north across the region.
240 PM EDT WED AUG 31 2016 Scattered showers with a chance of a thunderstorm will be possible into this evening as a cold front cuts across New York and Pennsylvania.
/issued 345 AM CDT WED AUG 31 2016/ With abundant moisture still in place, showers and storms will return once again as a weak cold front makes its way across the area this afternoon.
142 PM EDT WED AUG 31 2016 Aviation A cold front will move south of the state this afternoon, taking the high humidity and scattered showers with it. A secondary cold front and upper low will probably result in considerable cloudiness and scattered light rain showers on Thursday, particularly east of Highway 131. However a low chance of storms could arrive on Labor Day as warmer and more humid air arrives. The first is southeast of GRR and is associated with the actual cold front. Cold advection/thermal troughing at h8 and a moist low level nne flow off lake huron should lead to considerable stratocumulus clouds and sprinkles or light showers, especially before 18z.
This trough axis has interacted with diurnal heating to form scattered showers and convection, mainly north of the Mountain Parkway. The cold front is progged to make a southward push through Eastern Kentucky tonight before exiting to our south tomorrow afternoon. This will keep isolated to scattered showers and thunderstorms in the forecast through tomorrow morning, with some showers lingering along the high terrain through tomorrow afternoon. The winds will turn more northerly tonight and help usher in cooler, drier air behind the frontal passage.
337 PM MDT WED AUG 31 2016 High pressure centered over the Central Rockies will be shifting east tonight as a Pacific trough moves onshore. A few weak showers and thunderstorms will persist this evening over the higher mountains with one or two drifting over the valleys. As the trough moves inland on Thursday, moisture will be drawn northward across southwest Colorado and eventually up into the central zones by late in the day. Diurnal heating and slight increase in speed sheer, as winds aloft strengthen with the approaching trough, will be enough to kick off at least scattered showers and thunderstorms. Showers and thunderstorms remain in the picture through the night Thursday night as the trough moves into the Great Basin and moisture continues lifting north across the region.
Today 08z upper level analysis shows upper level high squeezing against what's left of sheared cyclonic spin over lee of Rockies as high retrogrades westward.
Today, we begin to see a slight change in the upper pattern as a weak upper ridge over OK/north TX region begins to shift SW over the area.
The showers were supported by a weak short wave trough in west-central Oregon.
Expect dry and stable conditions through Thursday as high pressure builds over the Central Rockies.
A deep layered ridge centered over the southeastern United States supports expansive high pressure across the eastern United States. The evolution of this phasing was sampled well by last night's RAOBs across Texas, depicting the short wave trough digging southeast into the western Gulf of Mexico. Moisture fields indicate the tail end of a cold front (previously mentioned moisture max southwest of Bermuda) will make a back door push through South Florida and the Florida Keys on Thursday.
Temperatures will be a couple degrees warmer than yesterday, some 10 to 15 degrees warmer than normal for the end of October. An upper level ridge will be over the area on Thu with dry conditions and above normal temps. By Fri the ridge will flatten somewhat with the flow aloft becoming more swly. Both the ECMWF and GFS continue to show a dry airmass in the low to mid lvls thus it will likely it end being dry thru Sun aftn. As for highs a sfc lee trough will redevelop east of the mtns so will see warmer temps across the plains with readings back in the mid to upper 70s. For Sun night into Mon both the ECMWF and GFS show an upper level trough moving across the nrn Rockies with nrn CO being on the srn end of this feature.
610 AM EDT Wed Oct 26 2016 Canadian high pressure will build over the area through Thursday.
Dry high pressure will remain over the region today.
Distinct warm front with light rain was near the northern CWA boundary and moving north. By noon our entire CWA will be in the warm sector south of the warm front and east of the cold front which will still be along the coast. High temps today will be in the 60s in the mountains and higher valleys, and upper 60s to mid 70s in the lower southern valleys. The cold front will move inland tonight and Thursday, reaching Baker and Harney Counties around noon PDT Thursday, and a Salmon-Boise-Rome/OR line late Thursday afternoon. Front will bring rain as it moves east, with extra moisture supplied by an upper low off California. Winds will be a steady southeast 10 to 15 mph through Thursday morning, then west or northwest 10 mph Thursday afternoon behind the cold front.
353 AM CDT Wed Oct 26 2016 Light rain/drizzle today as two areas of low pressure impact parts of the Northland. Becoming warmer Thursday as warmer southerly flow results in some slightly warmer air being brought into the region. Today light stratiform rain will gradually spread across northeast Minnesota and northwest Wisconsin as an elevated warm front begins to weaken as it lifts into the Northland. Warmer air finally moves in Thursday as a longwave ridge over the Rockies builds eastward towards the Great Plains. Flow turns out of the south Thursday night as an area of low pressure, associated with a 850hPa trough, translates east across the Dakotas. An increasing southwesterly low level jet will allow mid level temperatures to rapidly rise into the teens Celsius in the warm sector ahead of the low.
644 AM EDT Wed Oct 26 2016 Seasonal and dry high pressure will remain over the region today. before a weak and mostly dry cold front crosses the area Thursday.
222 AM EDT Wed Oct 26 2016 High pressure will continue to extend over Eastern North Carolina today and tonight.
This will also temper daytime heating and have held maximum temperatures in check accordingly, except in the southeast where southerly flow early this morning should allow for some warm air advection before the low/front moves through.
Quiet evening weather-wise, as high pressure to the north continues to cause breezy east and northeasterly winds. /issued 428 PM EDT Tue Oct 25 2016/ SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/ Dry day today as high pressure dominates, PWATs are below 0. Temperatures have topped out in the low 80s, a few degrees below average for late October. With deep-layer ridging centered north of the region, breezy northeast winds are prevailing. Aforementioned weather will generally hold Wednesday, although winds will increase as reinforcing surge of high pressure arrives from the north. Moisture, at least at the low-levels, will also increase, with a few showers possible by Wednesday night over far southern portions of the area. Expect northwestern 2/3rds of CWA to remain dry through the short term, as high pressure suppresses moisture to the south.
233 AM EDT Wed Oct 26 2016 Weak upper ridging will build across the region today, with more zonal flow tonight as a weak trough pushes southeast into the mid Atlantic southwestward to the Louisiana coast. Easterly flow will increase today as high pressure builds to the north and northeast. Morning temperatures will be much warmer than yesterday morning due to the onshore flow, and low stratus and patchy fog will continue into the mid morning across the interior before scattering out. Highs will be in the upper 70s along the coast and the lower 80s elsewhere.
336 AM CDT Wed Oct 26 2016 The main 500 mb short wave trough is moving into southwestern MN and far northwestern Iowa and the 850 mb frontogenesis has shifted to far SE MN into southern Wisconsin. But broad upper level trough does extend northwest to connect with the northern stream 500 mb short wave over central Saskatchewan.
Considerable cirrus noted over the forecast area this morning ahead of east Texas upper trof. This associated with a weak surface trof skirting west across the northwest gulf, and the approach and passage of an eastward tracking interior conus mid/upper trof.
121 AM EDT Wed Oct 26 2016 Dry conditions will persist until low pressure brings rain to the region tonight and Thursday. Cloud cover will increase this morning as low pressure moves over the mid-west. A dry atmosphere in the lower levels will allow the area to remain rain-free through much of the day. Low pressure will track from Chicago to Lake Erie and up to Lake Ontario tonight and Thursday, and will swing a cold front through the region Thursday afternoon. Previous PoP forecast looks on track, with the higher probabilities and qpf generally over the northern half of the area.
1109 PM MDT Tue Oct 25 2016 Upper ridge axis is bisecting the CONUS, with a weak wave over the rockies pushing some clouds and a few showers through the region. Upper wave will continue pushing eastward through the ridge tonight, with ridge axis rebuilding over the western states. With broad upper ridge in place, mild and dry weather will continue on Wednesday. Broad upper ridge will persist over the western two- thirds of the CONUS through the week, with dry and very mild conditions expected.
228 AM PDT Wed Oct 26 2016 Fair and warmer weather is expected through today and Thursday with patchy night and morning coastal clouds.
323 AM EDT Wed Oct 26 2016 A trough of low pressure will linger over the area today. A narrow ridge of high pressure will build in from the west overnight and will slide off to the east on Thursday.
640 AM EDT Wed Oct 26 2016 High pressure will continue to extend over Eastern North Carolina today and tonight.
North winds will be modestly gusty for a few hours this morning behind the weak cold front, followed by a stellar autumn afternoon. Through the end of the workweek, a large ridge of high pressure will encompass the central CONUS, and this will lead to more warmth. A new lee trough will develop as a southwest polar jet ejects from California into Idaho and western Montana, promoting leeside low development well to our north-northwest.
High pressure ridging will be well established across the forecast area today as the axis will be situated over the northern Rockies this afternoon. An upper low off the California coast will continue to stream mid and high level clouds across the area today, but overall a partly to mostly sunny day is expected. The ridge axis gets shifted east on Thursday in response to a disturbance that moves into the Pacific northwest.
A warm front with attendant rain is moving across central and NE Oregon and into the Lower Columbia Basin. A warm front will move south to north across the forecast area overnight bringing rain to all taf sites.
center of 590 upper high resides over southwest New Mexico with ridge axis extending north-northeast along the Continental Divide. center of 590 upper high slowly moves east into west Texas during the day as upper trough approaches the west coast. The upper high holds firm for the overnight hours with west coast trough moving little.
313 AM CDT Wed Oct 26 2016 Forecast highlights the next 7-10 days: Showers/thunderstorms southeast Kansas this morning, warmer than normal temperatures through much of the period, with minimal precipitation chances.
It's likely that the cigs will be reach the lowest flight rules, while Vis will be mainly IFR. An upper level trough will move across the Great Lakes region Wednesday into Thursday with the southern extent moving across the southeast on Thursday. Highs will be in the mid 80s inland and the lower 80s along the coast. Lows are forecast in the lower 60s inland to mid 60s along the coast.
More widespread showers are expected to develop ahead of a cold front late this afternoon and spread eastward through this evening. Area of light rain/sprinkles will continue this morning, especially at KSBN, as warm advection wing tied to an approaching upper trough lifts through.
Dry and mild weather expected to continue over the forecast area through the Short Term forecast period as weak upper ridging crosses the region tonight through the day Wednesday. VFR conditions expected through much of the TAF period as high pressure dominates the sensible weather.
644 AM EDT Wed Oct 26 2016 High pressure holds through today.
/issued 346 AM CDT Wed Oct 26 2016/ Upper pattern dominated by high pressure ridge centered over Mexico and extending up over the 4 Corners region to MT.
156 AM EDT Wed Oct 26 2016 A band of low-level moisture trapped under a 4kft inversion associated with a 850-900 hPa ridge axis combined with ample lake- air delta T's and some diurnal influence has allowed scattered showers to persist from near Thunder Bay across much of the NE half of Upper Michigan this afternoon. Low pressure continuing to organize over the central high Plains this afternoon will reach northern Iowa late tonight and far northern Illinois late Wednesday afternoon. Thick cloud cover will likely linger thru much of the day Thur despite the arrival of anti-cyclonic flow, due to the lack of strong mixing, thus temps could struggle to warm beyond the lower to middle 40s.
230 AM EDT Wed Oct 26 2016 High pressure will build into the area from southern Canda bring a dry but cool day today. Low pressure will move from the Ohio valley to the Great Lakes on thursday bring mixed precipitation followed by rain. The higher elevations may see frozen precip linger the longest throughout the day.
357 AM EDT Wed Oct 26 2016 High pressure will prevail through Thursday.
144 AM EDT Wed Oct 26 2016 before a weak cold front crosses the area Thursday.
Surface cold front should make it to our NW corner by about 12Z with initial southerly push across the west. Insofar as temps go, not a whole lot of difference is expected in the highs though lows may range from 45 in the NW to 60 SE.
An upper ridge will be over Montana today and Thursday with temperatures warmer than normal. A weak upper level disturbance will move over the top of the ridge today and bring mid and high level clouds to the forecast area. Mid and upper level moisture moving across the top of the ridge will continue to keep skies mostly cloudy tonight. With the thermal ridge and upper ridge axis over Eastern Montana, temperatures will be well above normal with highs in the 60s to lower 70s. Upper ridge moves to the east Thursday Night and flow aloft turns to the southwest.
639 AM EDT Wed Oct 26 2016 High pressure will build into the area from southern Canada bring a dry but cool day today. Low pressure will move from the Ohio valley to the Great Lakes on thursday bring mixed precipitation followed by rain. Expect steadier and heavier precip to taper off west to east through the evening and as cooler air advects in on NW winds overnight on the backside of the system there may be a mix with or change back to snow over higher elevation areas of the Catskills.
1103 PM PDT Tue Oct 25 2016 The next couple of days will be wet as a warm front moves over the region on Wednesday and stalls Thursday.
451 AM EDT Wed Oct 26 2016 High pressure anchored across Ontario will continue to nose down from the NE into northern/central GA through tonight. High temps in the low 70s across the higher elevations to the low 80s south of Macon.
328 AM CDT Wed Oct 26 2016 At 3AM, Temperatures are rather mild across the Mid-South, ranging from the lower 50s to near 60 degrees. A couple of mesoconvective systems are ongoing downstream of the main trough axis, with cirrus clouds beginning to overspread the Mid-South. The main storm track will remain removed well to our north over the next seven days, as a large ridge of high pressure builds over the southern U. Have introduced VCSH at JBR after 27/03Z as a cold front will begin to approach the area late Wednesday evening.
413 AM EDT Wed Oct 26 2016 Dry conditions will persist until low pressure brings rain to the region tonight and Thursday. Cloud cover will increase this morning as low pressure moves over the mid-west. A dry atmosphere in the lower levels will allow the area to remain rain-free through much of the day. Low pressure will track from Chicago to Lake Erie and up to Lake Ontario tonight and Thursday, and will swing a cold front through the region Thursday afternoon. Previous PoP forecast looks on track, with the higher probabilities and qpf generally over the northern half of the area.
633 AM EDT Wed Oct 26 2016 Low pressure east of Nova Scotia will continue moving east and high pressure will build south from northern Quebec tonight and Thursday.
More widespread showers are expected to develop ahead of a cold front late this afternoon and spread eastward through this evening. Easterly winds will pick up and VFR cigs will gradually lower today in advance of an approaching warm front/sfc reflection.
403 AM EDT Wed Oct 26 2016 Low pressure east of Nova Scotia will continue moving east and high pressure will build south from northern Quebec tonight and Thursday.
center of 590dm upper high resides over southwest New Mexico with ridge axis extending north-northeast along the Continental Divide. center of 590dm upper high slowly moves east into west Texas during the day as upper trough approaches the west coast. The upper high holds firm for the overnight hours with west coast trough moving little.
High pressure will remain over the region through tonight. A cold front will cross the area Thursday afternoon and evening.
200 AM EDT Wed Oct 26 2016 Dry conditions will persist until low pressure brings rain to the region tonight and Thursday. Cloud cover will increase this morning as low pressure moves over the mid-west. A dry atmosphere in the lower levels will allow the area to remain rain-free through much of the day. Low pressure will track from Chicago to Lake Erie and up to Lake Ontario tonight and Thursday, and will swing a cold front through the region Thursday afternoon. Previous PoP forecast looks on track, with the higher probabilities and qpf generally over the northern half of the area.
303 AM EDT Wed Oct 26 2016 High pressure will build into the area from southern Canada bring a dry but cool day today. Low pressure will move from the Ohio valley to the Great Lakes on thursday bring mixed precipitation followed by rain. Expect steadier and heavier precip to taper off west to east through the evening and as cooler air advects in on NW winds overnight on the backside of the system there may be a mix with or change back to snow over higher elevation areas of the Catskills.
346 AM CDT Wed Oct 26 2016 Upper pattern dominated by high pressure ridge centered over Mexico and extending up over the 4 Corners region to MT.
In addition, a warm front will lift north across the area, bringing a return to steady southerly flow at the surface. Meanwhile, trailing cold front and meager moisture in the 1000-500 mb layer will move into our NW CWA. Cold front will continue to push east on Thursday, with best forcing separating from lingering and shallow low level moisture. Noticeably cooler highs on Thursday behind the front.
1206 AM CDT Wed Oct 26 2016 The mild Autumn weather will continue tonight into Wednesday as a cold front approaches the region.
210 AM EDT Wed Oct 26 2016 Seasonal and dry high pressure will remain over the region today. before a weak and mostly dry cold front crosses the area Thursday.
330 AM CDT WED OCT 26 2016 An area of low pressure, currently over western Iowa, will track eastward to northern Indiana by midnight tonight. The trailing cold front is expected enter the by this afternoon, and exit the forecast area to the east by shortly after midnight. 1011 mb low pressure over western IA will track eastward to western Lake Erie by 12Z/Thu and over Lake Ontario by sunset Thu. Showers will already be east of IL by sunrise Thu with clouds decrease from the west during the day as 1024 mb high pressure moves into IL/IN with skies becoming partly to mostly sunny Thu afternoon. Cooler highs in the upper 50s and lower 60s with mildest reading sw CWA. Lows Thu night in the low to mid 40s, coolest over east central IL.
Expect this to be temporary as the higher clouds move in and act to inhibit radiational cooling and moderate temperatures a bit. At 2 pm CDT a warm frontal boundary extended across eastern Montana into western South Dakota. This feature is flattening the h500 ridge and generating low/mid level vertical motion. On Wednesday, the warm frontal boundary will move east through the region allowing a westerly mixing wind. Similar conditions are forecast Thursday with a pacific type cold front. Warmer temperatures both days will result in temperatures into the mid 60s Wednesday to lower 70s Thursday across much of western and south central North Dakota.
249 AM MDT Wed Oct 26 2016 Upper ridging will rebuild into the northern Plains today and Thursday. Weak southwest low level flow will temps that are near to slightly warmer than yesterday with highs reaching the mid 60s to mid 70s. More quiet weather expected Thursday as the upper ridge axis crosses the region.
SHORT TERM (Today through Thursday): H5 ridging over Northwest Mexico and the Southwest United States. Positive tilt short wave trough over the plains. High pressure extending southwest from the Atlantic Seaboard to the North Gulf Coast. Look for a mix of clouds and sun today with above normal temperatures, up to 10 degrees above normal, ranging from the lower to mid 80s at the coast to near 90 inland. The base of a mid level trough will dig toward the lower Mississippi Valley while an inverted mid level trough will move from the Western Caribbean into the the Southwest Gulf, bringing a pulse of moisture with it. Low temps will be in the mid 60s inland to the lower 70s at the coast, about five degrees above normal.
359 AM EDT Wed Oct 26 2016 High pressure holds through Wednesday.
Strong high pressure will result in dry and warm conditions the remainder of the week, with well above normal daytime temperatures for late October. A strong ridge building in from Mexico will lead to drier conditions and temperatures near record levels the next few days. High pressure will bring a drying trend and above normal daytime highs through the coming weekend.
A generally persistent (mostly) easterly low-level flow combined with the building upper ridge off to the west are continuing to be the main players with our current weather pattern. Temperatures should remain fairly persistent with numbers keeping on the slightly warmer side of normal.
Our next weather system will bring widespread rainfall,locally heavy at times, to just about all on Thursday as an upper level low approaches the Central Coast.
Clouds will be on the increase later Wednesday though as our next cold front approaches.
High pressure remains in control over the MRX forecast area today. Clouds will increase from west to east tonight, ahead of a cold front.
Despite cloud cover, abundant moisture at the surface has led to the development of fog, which has become locally dense through the Missoula valley and valleys of the Lower Clark Fork Region. A weak cold front will shift through the region on Thursday, bringing widespread showers to all of western Montana and central Idaho.
306 AM EDT Wed Oct 26 2016 Canadian high pressure will build over the area through Thursday.
Satellite imagery shows the next system maturing as it moves north off the PacNW coast with the trailing cold front nearly stationary off the NorCal coast.