Aikyam-Lab/Synoptic-Bench huggingface dataset:
Subjective 00Z upper-air analysis indicates an upper low was centered over northern ON, with troughing across must of the US east of the Rockies, including embedded troughs over ID-NV-northern CA and along the western AZ border. An 850mb low was centered in northeast ON, with sub-0C temperatures to the MO-AR border and to western WY/western MT in wake of the low. Temperatures during the early evening trick-or-treat hours will fall into the upper 20s to lower 30s by around 8pm, and with a south wind at around 10kt, the apparent temperature (wind chill) will register in the lower to mid 20s.
A cold front continues to slowly sag south across South-Central Texas and low clouds are currently developing along and north of the boundary. Overall, rain amounts will average a tenth of an inch to three-quarters of an inch with the higher amounts expected over the eastern counties.
631 AM CDT Tue Oct 31 2017 Water Vapor imagery shows a mid and upper level low pressure system moving through AZ and NM this morning which is creating some mid level WAA over Northeast NM and Eastern Colorado. Most of the short range models bring the weak high pressure across Northeast KS and into Central Missouri. This progged orientation of the high pressure to the mid level low in NM promotes an easterly component to the surface winds creating a strong over running signature over much of Kansas today. This set up will also make day time highs for today tricky as a web bulb affect could make afternoon highs a few degrees cooler than forecast, especially along the I-70 corridor.
This will be due to the upper low over the southwest moving east causing the subtropical jet to buckle northward orienting the jet along the Texas coastal bend today. The cold front currently slowing over east Texas and northern Louisiana will give the necessary isentropic surfaces providing a well developed interface for the sh/ts along with some embedded disturbances to develop and move along. With the support oriented sw-ne, a precip gradient will set up with the lowest amounts expected over the southeastern half of the area. Even warmer conditions may begin into the new week as high pressure settles into the area and the jet lifts out bringing more sun along with left over moisture remaining in the area.
Rain wl gradually overspread much of AR tngt into Wed as the atmosphere becomes saturated and the aforementioned front begins to lift back NWD as a warm front. Rain wl decrease later Wed/Wed night as upper support shifts EWD and the warm front lifts well N of AR.
Low pressure sits over the region later in the week, with rain at times Thu through Sat. Expect a cooler and showery weekend, with snow levels between 2500 to 3500 feet.
With broad surface ridging centered across S Georgia/N Florida, a quiet, dry pattern will remain in place today across much of the Southeastern US. Dew points will gradually tick upwards today by a few degrees, but still remain in the low 60s overnight and into Wednesday.
Otherwise, much warmer and rather tranquil for the most part overnight. This trough should help bring a weak cold front down into deep south Texas later today or tonight. Exactly how far south it moves is still questionable at least before it washes out or the remnants are swallowed up by the coastal trough. Out west we may dry out a little bit as dew points drop into the 50s behind the front, however, cloud cover and maybe some light shower activity/drizzle will be possible as the coastal trough remains over our area. Wednesday's forecast appears to be a little more uncertain all around depending on what exactly happens with the aforementioned trough.
Cooler seasonable temperatures will prevail the next couple of days. Any snow accumulation will be limited to the higher summits and generally an inch or less. Will mainly see rain showers Wed night and Thu, but chance for a bit of a mix in the higher elevations at onset Wed night.
Cooler seasonable temperatures will prevail the next couple of days. The band will also be shifting south as flow becomes more westerly today with upper level trough departing to the east. High temps today will be in the lower 40s to lower 50s. Will mainly see rain showers Wed night and Thu, but chance for a bit of a mix in the higher elevations at onset Wed night.
Temps will remain stagnant through the rest of today in the low 40s.
With breezy north winds, the temperatures will likely feel even a few degrees cooler than that. Northerly winds will also continue to advect cooler air southward. Most soundings indicate a ~0C (nearly) isothermal layer from 800-700 mb, a saturated dendritic snow growth zone, and the entire column below freezing.
253 PM EST Tue Nov 7 2017 High pressure centered over the central plains will extend across the Lower Great Lakes through Wednesday.
Sfc map shows the cold front extending from roughly Greenwood, MS to Shreveport to Killeen, TX. Expect aftn highs reaching the lower to middle 80s acrs the area today, so nudged max temps up a few degrees along with tweaking the hourly temps/dewpoints for today. A cold front is expected to approach the region from the NW late tonight. For the remainder of today, fog expected to lift right after sunrise as the winds mix the boundary layer, leaving partly to mostly cloudy skies with afternoon temperatures in the lower 80s. Chances will continue to increase ahead and along an advancing cold front.
Satellite imagery/surface maps reveal subtle short wave trough passing through northern lower Michigan. yet another weak- ish cold front dips down into the the Lake Superior/U.
1051 AM CST Tue Nov 7 2017 The cold front has moved through the Mid-South, resulting in cool, overcast conditions across the board. Temperatures are likely to hold steady in the low/mid 50s across much of the CWA this afternoon, but will gradually fall over northeast MS where temps are currently in the 60s to near 70 degrees. Cooler air will work into the region tonight.
High pressure will remain extended across the region as frontal boundary across the southeast U. Highs will range from the low 80s along the coast to mid 80s over the interior. Strong high pressure will works its way across the Eastern CONUS with ridging building down the eastern seaboard.
High pressure is expected to slide southward across the northern and central Plains region tonight into Wednesday. Below normal temperatures are expected to continue, with lows tonight dropping into the lower 20s in most areas. Highs Wednesday should reach the lower to middle 40s.
234 PM EST Tue Nov 7 2017 A cold front near the north part of the forecast area will sink southward and through the area tonight.
Showers associated with an inverted trof should be diminishing by daybreak or shortly thereafter.
Light to gentle northeasterly breezes prevail along the southern flank of a high pressure cell centered along the northern Gulf coast.
The ridge continues through tonight into Wednesday, which will keep the region dry, but high levels clouds and lingering low level stratus will keep temperatures from dropping dramatically tonight.
Weak low pressure across the Tennessee Valley will migrate eastward into the Carolinas this evening. Expecting most locations to bottom out in the low to mid 60s with upper 60s expected along the immediate coast. Highs on Wednesday will range from the lower 60s in the far north and west to the low 70s in the southeastern portion of our area.
Light snow will spread into areas north of highway 2 by later Wednesday morning, dropping into the highway 200 corridor during the afternoon. Still looking like an inch or so of snow along the highway 2 corridor, tapering down to almost nothing over the southern Red River Valley. A broad upper level trof slides south out of Canada to start the period with chances for light precipitation and cooler temperatures.
214 PM EST Tue Nov 7 2017 High pressure centered over South Dakota with a ridge axis that extends east across the Great Lakes will provide dry cool weather along with mainly clear skies through Wednesday night. Highs will be slightly below average in the low to mid 40s.
Tonight and Wednesday The latest RAP analysis and satellite/radar imagery show high pressure centered from the northern Rockies to the Great Lakes early this afternoon. The next cold front is digging southeast across central Canada, with mid and high clouds already approaching the northern MN border. High pressure will slide to the southeast into the Central Plains at the same time as the next cold front approaches northern Minnesota by early Wednesday morning. The cold front will move into northwest Wisconsin by late in the afternoon. High temperatures will range from the low 30s in Vilas County to the lower 40s near the Lake.
Surface analysis at 21Z has cold front just north of Brenham, Huntsville, Lufkin line.
There will be a fairly sharp gradient to no snowfall at all given how dry the lower troposphere is now. Some breaks in the clouds will begin as early as a few hours before sunrise north of the Arkansas River, which will allow temperatures to fall to the lower to mid 20s.
330 PM EST Tue Nov 7 2017 Low pressure will move east tonight, followed by weak high pressure for Wednesday.
Highs of 45-50F with cooler mid 40s northern CWA. These readings are about 10 degrees cooler than normal for early November. Ridge stretching back from the Plains over the Great Lakes this morning resulting in northeasterly winds over Central IL as the precip in the southeast slowly dwindles on radar. Cooler through the end of the week.
310 PM EST Tue Nov 7 2017 High pressure will build in from the west and crest over the area tonight.
As the above mentioned high pressure system continues to dump down the MO RVR Valley and IA, expect the clearing to also push to the south and make it acrs most of the CWA except maybe the far south/southeast by mid evening. The lower stratocu deck acrs north central NE into southeastern SD is slated by HiRes lower level RH progs to slosh east tonight along the IA/MN border and thus stay north of the area into Wed morning, but it may get close to the northern fringe after 3 AM CST. most areas in the low to mid 20s.
Temperatures ranged from the lower 20s in portions of the north, to the lower 30s south. High pressure will gradually move southward across the region overnight, as a strong cold front moves across south central Canada, toward the US border. Have dropped temps a few degrees, but still looking for temperatures to be warmer than last night due to the strengthening pressure gradient ahead of the incoming cold front. The cold front will move across the Northland on Wednesday. Highs will range from the lower 20s in the north to the lower 30s south.
Cold front located over the Northern Texas Hill Country as of this writing has not shown much progress this afternoon. Cooler air is lagging behind some (couple of hours), but could see some showers along the boundary as some good surface convergence will occur with the boundary. Wednesday highs are mainly for the morning and could be the same as the overnight lows, especially north where the cooler air and associated cold air advection will be.
An elongated upper trough is bisecting the state early this afternoon from NE to SW. This trough will slide southward tonight with heights aloft building behind it through Wednesday.
207 PM EST Tue Nov 7 2017 Issued 1225 AM EST Tue Nov 7 2017 High pressure will build into the Great Lakes for most of this week but temperatures will be cool with highs mainly in the 40s and lows in the upper 20s to lower 30s.
1232 PM EST Tue Nov 7 2017 High pressure will build in across northern Maine today, while weak low pressure will track to the east south of New England.
1032 AM CST Tue Nov 7 2017 Our cold front as of 16z was located near a Jacksonville, Tx. Meanwhile, near and just north of the boundary, we should see temps come up a few more degrees over the next several hours but the much cooler temperature trends lag the front a good bit, near and to the north of the Interstate 30 Corridor of Northeast Texas into Southwest Arkansas. Radar trends have shown patchy drizzle immediately behind the cold front but we are beginning to see some isolated showers across our extreme northern zones and given dbz values as of late, cannot rule out a lightning strike or two as we go through the remainder of the day.
307 PM CST Tue Nov 7 2017 Cool and overcast conditions persist across the Mid-South this afternoon in the wake of the early morning cold front. The flow aloft is quasi-zonal with a strong upper-tropospheric jet core extending from the Central Plains into the lower Ohio River Valley.
Tonight high pressure will move over the area, pushing all the precipitation to the east.
353 PM CST Tue Nov 7 2017 At mid afternoon the region was under clear skies and light winds due to high pressure building in from the west. A strong short wave will rotate through the low and dip into northern MN late tonight and into central and southern MN and west central Wisconsin late Wednesday afternoon and evening to generate some light snow. There will be some fairly strong FGEN associated with this cold front and so could see a quick burst of snow of an inch or less. Issued at 3:14 PM CST Tue Nov 7 2017 There will be a very strong cold front moving across the region with temperatures dropping considerably as the front goes through and bring the coldest air of the season so far.
Rather impressive 3 hour pressure falls were noted over the higher terrain with values in the 5-6/mb 3hr pressure falls noted. \/Hodanish Upper ridge will control southern Colorado weather through the period.
207 PM EST Tue Nov 7 2017 An area of low pressure in Northeast Tennessee will move southeast this evening into tonight. Meanwhile, high pressure will wedge south east of the mountains. Low pressure in northeast Tennessee and an associated surface wave to the west in the Tennessee valley will move southeast tonight. Then, low pressure is expected to redevelop off the Mid-Atlantic Coast overnight and will lift northeast offshore Wednesday. In general, low temperatures tonight will range from the mid 30s in the north to the lower 40s in the south along the southern Blue Ridge mountains. It will be a cool day with readings from the lower 40s in the mountains to around 50 degrees in the piedmont.
High pressure will return to the area on tomorrow.
There are a couple showers occurring on the Cumberland Plateau but would expect a fair amount of this action to dissipate coming off the higher terrain. The downslope flow behind the cold front is allowing for a break in the lower overcast at the terminals. The deterioration into mvfr category ceilings would have a better chance of developing around 00-03z as the low level flow becomes more northerly. Placed some mvfr ceilings and visibility reduction in fog with a vicinity shower around 08-14z as weak lift forms with the approach of another short wave trough.
1029 AM MST Tue Nov 7 2017 Current surface map places high pressure across the Dakotas. Models in decent agreement with next cold front moving south across the area on Wednesday.
A moist and cool pattern fills in behind a cold front later tonight into Wednesday as another short wave rotates southeast out of the Midwest in a seemingly never ending series of waves transiting the Eastern U. A saturated low level airmass remains in place through the short term and there could be a couple sprinkles later tonight into Wednesday morning as the upper trough moves over the Southern Appalachian region.
Copacetic conditions for an autumn southerly flow situation this afternoon with the typical gustiness between the central Gulf ridge and Sierra Madre trough.
However, the cold front is still draped across the mid-state. That means the clouds will continue and for those north of the cold front, cooler temperatures. With the cold front still not expected to move completely south of us until this evening, a few additional showers are possible this evening. IFR flight conditions are expected throughout the afternoon hours as we deal with the cold front draped across Middle TN.
A ridge of high pressure will move into the region Wednesday night, starting the warming trend.
well not so fine as the cooler airmass stalled and temps soared into the 80s in Pecos and Fort Stockton.
244 PM EST Tue Nov 7 2017 Wave of low pressure passing just south of the area today. Cooler air moves in for the end of the work week. Area of low pressure currently pushing through the mountains of southern WV and southwestern VA. Another weak low pressure wave brushes by to the south on Wednesday. Strong high pressure builds and shifts across the Upper Great Lakes which, combined with northwesterly flow aloft, brings in the coldest temperatures yet this year.
325 PM EST Tue Nov 07 2017 A stalled cold front across southern NC will finally push south of the area tonight, as high pressure wedges in from the NE. Strong and chilly high pressure will build in from the north late this week.
114 PM MST Tue Nov 7 2017 Deep westerly flow is in place in the mid and upper levels across the Central High Plains, with a positively tilted trough extending from the Great Lakes to the Great Basin. This afternoon-Tonight: The mid/upper level trough over the Great Basin is expected to move southeast overnight (some timing differences in models).
915 AM PST Tue Nov 7 2017 Weak high pressure aloft will bring warming for Wednesday with slightly above normal temperatures.
With the clearing skied and lighter winds tomorrow night, lows in the the lower to mid 30s are expected. Despite the clearing skies, highs tomorrow will be on the cool side in the low to mid 50s.
1041 AM MST Tue Nov 7 2017 Early morning GOES-16 Water Vapor/Infrared satellite imagery depicted a upper trough axis from eastern MT through eastern OR. A cold front extended from northeast CO to a weak low near Laramie then west into southwest WY. Drier and milder weather will return to the CWA Wednesday as a ridge of high pressure aloft shifts east toward the Continental Divide.
Lapse rates are well on the positive side as a warm nose will be present in the low levels leaving no chance for convectively driven precip. Precip is mostly expected to be light, under one half inch, across the FA with the lowest amounts occurring in our northwestern zones. The risk from freezing rain does not appear to be a big issue in areas where temperatures are forecasted to be just below freezing as ground surfaces should be warm enough to prevent ice formation. Skies will begin to clear tomorrow evening into the night as surface ridging dominates the surface. This should leave winds light enough to allow for radiational cooling to lower temps below freezing across much of the region.
1200 PM CST Tue Nov 7 2017 Sct to bkn ceilings acrs the region ahead of a cold front that will move down this aftn/eve time frame exiting south cntrl La drg the ovrnght hrs. Sfc map shows the cold front extending from roughly Greenwood, MS to Shreveport to Killeen, TX. Expect aftn highs reaching the lower to middle 80s acrs the area today, so nudged max temps up a few degrees along with tweaking the hourly temps/dewpoints for today. A cold front is expected to approach the region from the NW late tonight. For the remainder of today, fog expected to lift right after sunrise as the winds mix the boundary layer, leaving partly to mostly cloudy skies with afternoon temperatures in the lower 80s. Chances will continue to increase ahead and along an advancing cold front.
308 PM CST Tue Nov 7 2017 Tonight through Tuesday: Latest Rap and Satellite imagery showed flat ridging through the atmosphere. A slow moving cold front was slowly making its way across the region. Looking at temperatures lows will be in the lower 50s north to the lower 60s southeast.
At 2 PM the cold front was located near a Austin to Fredericksburg line. As the main trough axis and forcing swings through the region Wednesday evening a band of elevated convection is indicated by models to move east out of the Hill Country, through the I-35 corridor, and into eastern counties.
A shallow wedge of cold air is in place behind a cold front which has pushed down into central TX and northern LA. Increasing low-mid level cold frontogenetic and QG lift will result in increasing rain chances late tonight into Wednesday morning, with the better chances over southeast OK. temperatures won't warm much today and have stuck fairly close to the cooler NAM guidance for afternoon highs. with precipitation tapering off Wednesday evening as the trof axis shifts east.
Ground temperatures still quite warm, and with ambient temperatures at or above freezing tomorrow, any snow that does accumulate will quickly melt and not expected to create any significant travel issues.
335 PM EST Tue Nov 7 2017 High pressure will remain in control across the Great Lakes region through Wednesday night.
/issued 1051 AM CST Tue Nov 7 2017/ The cold front has moved through the Mid-South, resulting in cool, overcast conditions across the board. Temperatures are likely to hold steady in the low/mid 50s across much of the CWA this afternoon, but will gradually fall over northeast MS where temps are currently in the 60s to near 70 degrees. Cooler air will work into the region tonight.
Weak high pressure aloft will bring warming for Wednesday with slightly above normal temperatures.
High pressure surface and aloft across the Gulf and Florida will remain in place through tonight then will sink south some on Wednesday as a weakening cold front approaches the northern peninsula late in the day. Temperatures tonight and Wednesday will remain above normal with lows tonight in the lower to mid 60s inland areas, and mid to upper 60s along the coast, with daytime highs on Wednesday in the lower and mid 80s. Wednesday night will likely again see some patchy to areas of fog overnight as high pressure will continue to be in place.
328 PM EST Tue Nov 7 2017 Mixed rain and snow showers will come to an end across northeast Pennsylvania and Sullivan county this evening as low pressure moves off the mid Atlantic coast.
1110 AM CST Tue Nov 7 2017 Raised the high temperatures a couple of degrees over the forested areas of northwestern Minnesota, as the sunshine in combination with the trees is already warming up the area, and highs should reach the mid 20s. Highs across northeastern North Dakota will see a stronger influence from snow cover, with highs only in the low 20s. and allow for the development of a slightly warmer southwesterly surface flow. Early morning temperatures which have bottomed out well below zero across the northern half of the FA should warm to around the lower 20s today. Late this afternoon should see an increase in low to mid level clouds along the CanAm border in advance of another Canadian Cold Front.
242 PM EST Tue Nov 7 2017 Weak low pressure will track to the east south of New England tonight.
356 PM EST Tue Nov 7 2017 Generally benign pattern will continue through the next few days as high pressure sits over the Atlantic.
VFR CIGs will prevail through the afternoon and evening as a cold front moves through the region. Except, a cold front currently along a Waco to San Angelo line will bring falling temperatures across our Central Texas counties mid to late afternoon, which is a little ahead of previous forecast timing.
1237 PM EST Tue Nov 7 2017 Wave of low pressure passing just south of the area today. Cooler air moves in for the end of the work week. Area of low pressure currently pushing through the mountains of southern WV and southwestern VA. Another weak low pressure wave brushes by to the south on Wednesday.
The cold front we've been talking about over the last several days has finally reached northern Colorado and will continue to drop southward through the evening hours. Some heavier precipitation is expected as the front moves through with rain for the low elevations and snow for the high. Once the front and upper level trough push through, accumulating snowfall will end which is expected to occur around midnight. Northwesterly flow will keep pumping in cooler air from the north which should keep temperatures at or below normals for a few days. Thanks to the ridge, expect clear and sunny skies.