Aikyam-Lab/Synoptic-Bench huggingface dataset:
THURSDAY: No significant changes in the weather pattern into tomorrow as the western Atlantic ridge remains in control of the local weather. FRIDAY INTO THE HOLIDAY WEEKEND: Models are a little more aggressive this run with the southward dip upper level low and associated trough moving through the Great Lakes and into the eastern US late week. This results in the upper level ridge axis being displaced further south, and a weakening of the low level ridge as a frontal boundary is briefly able to get further into the Florida peninsula.
1127 PM MDT Wed Aug 30 2017 A trough is moving onshore the Pacific NW today originating from a closed low over Alaska. This weak upper level trough will rotate around the high pressure in place and shift the high pressure southward over the next couple of days. As this occurs, energy from the trough will rotate through the northern part of UT and CO, bringing clouds and some showers and thunderstorms. The main activity will be when the trough passes from north to south through the region on Friday. The timing of the main trough passage looks to be on Friday morning. though the trough never leaves central UT and northcentral CO.
Upper trof pushes frontal system through eastern Montana today. High pressure slides into the state behind the front tonight, resulting in a slight dip in temperatures and lighter winds for Friday. Synoptic Setup: Long range begins with hot high pressure over the western half of the CONUS this flattens out right along the International Border where zonal flow sets up over the southwestern quarter of Canada.
The remnants of Harvey continue to lift slowly northeastward across Louisiana, becoming absorbed in a broad upper trough over the Great Lakes region. Meanwhile, potent upper ridging resides on either side of what once was Harvey. An elongated trough will develop in the wake of Harvey and gradually shift eastward tonight into Friday, nudging the ridge axis southward and allowing increasing moisture to return to the region. A remnant trough will drift eastward into the Florida Panhandle and Big Bend regions Friday. As surface ridging is shunted southward, southwesterly flow will allow this activity to move onshore rather early Friday, mainly along the Nature Coast. The first half of the weekend looks fairly cloudy and wet across west-central and SW Florida as a trough will be draped across the southeastern U.
Much desired relief from the rain is expected into the weekend as drier conditions filter in with an area of high pressure building over the region.
High pressure will continue to build into northern Lakes today, the center of which sets up shop just to our northeast by tonight. Even with that sunshine, temperatures this afternoon expected to only top out in the lower/middle 60s for most (perhaps a touch warmer far southwest in favored downslope areas).
A weak warm front continues across portions of our western zones. At 500 mb, our forecast area will be situated between a slowly weakening, positive-tilt trough to our west and a strong high pressure system over the western Atlantic.
High pressure centered north of Lake Superior will settle across the Great Lakes later today and tonight.
336 AM CDT Thu Aug 31 2017 Upper level impulses moving east out of Montana and Wyoming were dampening the upper level ridge that has been in place the past few days over the Rockies and western plains.
Broad high pressure over the region will dominate the weather on Thursday with some gusty SE flow resuming. Deep layer dry air continues over the region between departing TS Harvey and strong mid level ridge over the Desert SW and Rockies. One more night of fairly comfortable temperatures with lower than normal dewpoints then near normal highs on Thursday with some of the higher clouds possible thickening up in the afternoon.
350 AM CDT Thu Aug 31 2017 High pressure will be east placing the region in southerly low level flow. Upper ridging will keep the region dry (until late tonight).
325 AM CDT Thu Aug 31 2017 An area of low pressure and upper level trough will approach the region today from the west. While the upper level trough and surface front will pass through the region tonight, several CAMS suggest pre-frontal storms developing in our western CWA later this afternoon.
Cooler temperatures and cleaner air should move across the Inland Northwest tomorrow and Friday. High pressure will build into the region for the remainder of the holiday weekend and into the next workweek with continued dry weather and a return of unseasonably warm temperatures. The upper level trough is pressing east of the Cascades. Still not confident how much layered smoke clearing there will be as the Cascade fires were quite active early this evening and could add more particles into the lower atmosphere. Did keep VFR vsbys at the TAF sites, with the thinking that the breezy winds should keep the lower levels mixed.
621 AM EDT Thu Aug 31 2017 A strong cold front will sweep across the area today accompanied by scattered showers.
Temperatures this hour were in the low and mid 70s. Rain will taper off across the southwest Delta counties tonight but linger from just northeast of Memphis to the Lower Tennessee River Valley for most of the day Friday as the low center is progged to slow as it moves into southern Kentucky.
High pressure will shift from Ontario into the Lake Superior region tonight into Thursday. Overnight lows will likely be in the lower to upper 40s for most areas. Clouds will increase Friday afternoon thanks as a result of broad-scale ascent ahead of the trough.
310 AM CDT Thu Aug 31 2017 07Z water vapor imagery shows an upper ridge from the four corners region through the northern plains. An upper level trough has propagated on shore over the Pacific northwest. At the surface, high pressure continued to prevail from the Great Lakes through the southern high plains. For temps, the surface ridging is expected to maintain an easterly low level flow with no real warm air advection. So temps should be pretty similar to the last couple days with highs in the lower and middle 80s.
644 AM EDT Thu Aug 31 2017 A frontal boundary will drop south through the area this morning into the early afternoon bringing clouds and cooler temperatures. Highs today will reach the low to mid 70s. Brisk easterly winds will develop between high pressure building into the Great lakes and low pressure tracking into the Ohio Valley tonight into Friday.
An upper trough over the Pacific Northwest and northern California will continue to push east this morning into the afternoon hours. This will allow upper level high pressure over the Eastern Pacific to drift east toward the northern California and Oregon coastline this afternoon. with temperatures between 2 and 5 degrees warmer this afternoon compared to yesterday afternoon. Upper level high pressure will continue to build east into the region Friday through the weekend.
348 AM EDT Thu Aug 31 2017 Upper ridge across south Florida will lift to the northeast today as Harvey moves slowly towards the Tennessee Valley. Drier air in the low/mid levels will prevail today, with precipitable water values of 1. Partly cloudy to partly sunny skies will prevail this afternoon, with highs in the low to mid 90s. The associated trough will slowly push the Atlantic ridge south and east.
348 AM CDT Thu Aug 31 2017 The amplified ridge over the west will begin to break down today and tonight as a strong upper disturbance moves across northern Canada. Energy associated with this disturbance will act to break down the ridge bringing a short wave into the Plains states. This trough will be approaching the region Friday morning. As the upper trough approaches and lee troughing at the surface deepens southerly winds will be somewhat stronger than the previous few days. Highs on Friday are again expected to be in the low to mid 80s.
308 AM CDT Thu Aug 31 2017 Surface map early this morning had a cold frontal boundary pushing southward into northern IL/central IA as high pressure was building in from Ontario Canada. For today, high pressure over southern Ontario will continue to pump in drier/cooler air into the area. Will keep the forecast dry for now given the high pushing lower dew point air in. High pressure maintains control across the area through Friday night. Highs Friday will be in the lower/middle 70s.
651 AM EDT Thu Aug 31 2017 A weak cold front will drop south across the region today and stall south of the Ohio River.
313 AM CDT Thu Aug 31 2017 A weak backdoor cold front will move southwest into northeastern MO this afternoon.
318 AM EDT Thu Aug 31 2017 A frontal boundary will drop south through the area this morning into the early afternoon bringing clouds and cooler temperatures. Highs today will reach the low to mid 70s. Brisk easterly winds will develop between high pressure building into the Great lakes and low pressure tracking into the Ohio Valley tonight into Friday.
A dry cold front is still anticipated to push through the Northern Rockies today, which will cause westerly winds to steadily increase throughout the day. Temperatures should be around 5 degrees cooler today compared to yesterday with most valley locations being in the low to mid 80s. Abnormally hot and dry conditions will once again return for the weekend as high pressure builds over western Montana and north central Idaho.
417 AM EDT Thu Aug 31 2017 A cold front will bring scattered showers and possibly a rumble of thunder today.
For the weekend, the high settles near Bermuda, keeping a similar pattern in place.
633 AM EDT Thu Aug 31 2017 MVFR stratus will filter south through area this morning within NNE flow in wake of passing cold front. Expect a transition to lower VFR cigs and rather quick clearing late in the day as a building area of high pressure brings much drier low level air. Period of MVFR stratus expected this morning in wake of cold front with skies scattering out early/mid afternoon and then becoming clear this evening.
254 AM CDT Thu Aug 31 2017 A weak cold front pushed into northeast Iowa and northern Illinois during the overnight hours, accompanied by increasing clouds. A weak back door cold front is dropping south through the forecast area early this morning, accompanied by a northeast breeze and increasing clouds. Have favored the cooler end of temperature guidance, with lows expected in the mid 40s to mid 50s, about 10 degrees below normal for the date. With surface ridging in place Generally nice weekend in store.
324 AM EDT Thu Aug 31 2017 Weak high pressure today.
Moisture trapped under an area of high pressure overhead will lead to scattered showers and thunderstorms each day, with lower chances in the southern Great Basin over the weekend. Strong high pressure over the eastern Pacific was also clearly visible, and this will work its way into Oregon tomorrow, suppressing storms in the northern zones over the weekend but leaving the central and southern zones under easterly flow and open to moisture advecting in.
557 AM CDT Thu Aug 31 2017 A weak backdoor cold front will move southwest into northeastern MO this afternoon.
115 AM EDT Thu Aug 31 2017 A cold front will bring scattered showers and possibly a rumble of thunder today.
240 AM EDT Thu Aug 31 2017 A strong cold front will sweep across the area today accompanied by scattered showers.
On Friday, the flow aloft will be northwesterly following the passage of a weak trough that will have shifted to the north and east of the state in the morning. An associated cold front will push across the Denver area around 18z. Over the weekend, it will become increasingly warm and stable in the mid levels as a ridge of high pressure builds over the western U.
500 AM CDT Thu Aug 31 2017 The upper level ridge across the Swrn U. A second area of showers of thunderstorms may fire off the Laramie Range this afternoon followed by a third area of thunderstorms associated with a upper level trof over Oregon. Given the weak focus at the lower levels, POPs are limited to 30 percent for this portion of the forecast. The upper level ridge will build back across the western US by Friday evening.
High res guidance continues to show mostly isold tsra expected over the higher terrain for later today and into this evening. Winds are expected to keep up a bit tonight across the plains so early morning temps are expected to be a bit warmer than this mornings lows.
1115 PM MDT Wed Aug 30 2017 Latest satellite imagery and upper air analysis show the ridge of high pressure centered over the Four Corners Region. Rotating south around the ridge was a short wave trough over Northwestern Nebraska. This short wave trough has lead to some rain activity. For the rest of the afternoon and into the evening this short wave trough will continue to move south toward the Tri-State Area, but will fill before moving into the forecast area. During the day another upper level short wave trough will flatten the ridge to the west some as the trough moves southeast. Isolated storms may accompany this trough as it nears the forecast area by early evening.
Elsewhere, skies are clear as high pressure builds over the region. Current temperatures are a little cooler compared to 24 hours ago and range from the 40s in the mountain valleys to the lower 70s across the milder portions of the Sacramento Valley.
Relatively quiet WX pattern to continue one more day as an H100-H70 bubble high over the peninsula pushes into the W Atlc and merges with the Bermuda Ridge. Axis of the ridge will position itself in the vcnty of Cape Canaveral, resulting in a deep SE flow early in the day that will veer to due south by late aftn. However, the high dewpoint depression values thru such a deep lyr will require a fair amount of moisture in order to support much more than isold convection.
A fast movg cool front will approach Tue bringing a better chance of convection across the area, clearing from the north on Wed as stg northerly flow aloft resulting from stg upper ridging over western states, drives this front coastbound. Durg the weekend, aftn highs expected in upper 80s to lower 90s, and overnight lows in upper 60s to lower 70s, to be achieved prior to the postfrontal cooler temps mid week.
154 AM EDT Thu Aug 31 2017 Weak high pressure will extend across the area into tonight. A cold front will drop south across the region on Thursday and then stall just south of the Ohio River.
607 AM EDT Thu Aug 31 2017 Weak high pressure today.
250 AM PDT Thu Aug 31 2017 Building high pressure will bring a dry and stable airmass to the region Thursday and Friday.
Do not expect as much in the way of fog tonight/early Thursday morning due to slightly warmer low temperatures expected across the area. Gosselin (Thursday Night - Friday Night) The models are in rather good agreement that the remnant TC Harvey low will lift northeastward through the western TN Valley Thursday Night, and through the lower OH Valley Friday-Friday Night.
339 AM EDT Thu Aug 31 2017 Weak high pressure over the region will shift off the coast today. A weak cold front will stall over the area Friday, merging with the remnants of Harvey and an associated warm front, then lifting back to the north Friday night.
Upper level trough will work through the region today. Ridge of high pressure builds over the area for Friday and appears to remain in control through most of the forecast. Last of the low pressure trough will be crossing Southeast Idaho today with winds aloft becoming more northwesterly in the afternoon and the air becoming drier and more stable.
The environment will continue to destabilize today as a warm front lifts northward and wedge over northeast GA erodes. Tornado threat is non-zero across the CWA, but especially over NW GA as storms interact with the warm front boundary. Temperatures through the short term remain below normal, particularly across far north GA due to the placement of the warm front, the precip coverage and insolation.
518 AM EDT Thu Aug 31 2017 A cold front will bring scattered showers and possibly a rumble of thunder today.
332 AM MDT Thu Aug 31 2017 Two weak troughs will pass over the northern Rockies and clip northern CO and UT today and tonight. These will force the persistent ridge over the central Rockies to collapse and retreat to the south. A broad but broken band of mainly mid and high cloud will define these troughs as they move through. By Friday morning the area of precipitation should be confined to the Continental Divide and the San Juan mountains where a boundary associated with the upper troughs will stretch from east to west across the four corners region.
418 AM EDT Thu Aug 31 2017 A cold front will bring scattered showers and possibly a rumble of thunder today.
Highs will generally range from the lower 70s across the Hill Country to upper 70s along the coastal plains.
A cold upper trough will bring the next chance for rain this weekend with possible snow accumulations at mountain passes.
429 AM CST Thu Nov 30 2017 Current observations show a cold front moving through West Texas and has almost reached the Permian Basin. However this cold front will become stationary near the Pecos River later today, and any front this time of year that fails to progress any farther than that is weak and in fact we will see higher temps today than we saw yesterday. An upper low currently off the southern coast of California will move east in this zonal flow along the U.
431 AM MST Thu Nov 30 2017 Drier and somewhat warmer air aloft moving over Colorado today while southerly flow redevelops across the plains. This will allow most of the plains to get warmer than yesterday, while areas near the foothills that were so warm yesterday should be a little cooler. Southerly flow should develop a Denver cyclone this morning with lighter northerly winds near the foothills, which will also hold back temperatures there just a little.
1011 AM EST Thu Nov 30 2017 A weak cold front will approach today and move into the area tonight.
518 AM CST Thu Nov 30 2017 High pressure has set up just to our south so we can expect deep westerly flow and good mixing.
1040 AM EST Thu Nov 30 2017 Quick morning update with some minor tweaks to precipitation chance grids and temperature grids as this cold front approaches our area. Chattanooga Airport, TN 64 50 63 45 / 50 50 0 10 Knoxville McGhee Tyson Airport, TN 61 47 60 44 / 50 50 10 10 Oak Ridge, TN 60 46 60 43 / 50 50 10 0 Tri Cities Airport, TN 61 43 58 37 / 40 50 10 0.
As of 08Z Thursday morning a mid-level trough was progressing across the southern Canadian prairies. At the surface an anticyclone was centered near the CO/WY/NE border region. As the upper trough in southern Canada continues to eject eastward, mid and upper level moisture will be shunted southeastward. As the surface anticyclone shifts to the east of the CWA overnight, southerly flow will return to the central Plains.
430 AM MST Thu Nov 30 2017 Current IR satellite loop shows the upper level trough, which brought windy conditions to portions of the region yesterday, is already moving across the Great Lakes region early this morning. With no polar airmass expected across the plains, temperatures will be slightly warmer than normal for this time of the year on Thursday and Friday, although overnight lows will be chilly and generally below freezing. High temperatures each day will generally range between the mid 40's (west) to mid 50's (east), with Friday likely slightly warmer than Thursday. Kept temperatures a few degrees cooler along the ridges on Thursday due to south winds.
545 AM EST Thu Nov 30 2017 A cold front, will bring showers to the area this afternoon and evening.
with some spots falling to near the freezing mark across the Concho Valley and Heartland. A weak cold front will move across the area in the afternoon but will have little effect on our weather other than a wind shift out of the northeast. Temperatures will be warmer than yesterday. Lows tonight will be warmer than this morning owing to increasing mid and high level cloud cover.
637 AM EST Thu Nov 30 2017 Aviation Low pressure moving across southern Canada will bring a cold front through Michigan with a few rain and snow showers this morning. Could see some wet snow mix in at times next few hours but no accums are expected given sfc temps above freezing. Front moves east with showers ending across the southeast zones by the afternoon then sfc ridging moves in.
620 AM EST Thu Nov 30 2017 High pressure will give way to a weak cold front tonight. This will be followed by another high pressure that will dominate through the weekend. The high pressure will extend southward into NC this morning, then shift offshore this afternoon. The increase in cloudiness will be associated with the approaching but weakening cold front to our west.
201 AM PST Thu Nov 30 2017 Weak high pressure will remain over the area into Friday favoring weak to moderate valley inversions each morning.
Gradient has relaxed a bit with high pressure north of the region.
648 AM EST Thu Nov 30 2017 High pressure today gives way to the next round of precipitation arriving this evening. High pressure returns during the day Friday, leading to a rather quiet and mild weekend. Today will start off dry as the ridge of high pressure continues to shift eastward. Winds will be a bit gusty, especially in the Champlain Valley this afternoon with winds 15-25 mph and gust up to 35mph while other locations should remain in the high teens to low 20s for gusts. Models continue to lower QPF with the northern counties and higher elevations still seeing the highest amounts around 0. Overall, most of the higher elevations should see mainly snow showers with the valleys seeing rain showers switching to a mix before things quiet down early Friday morning.
459 AM CST Thu Nov 30 2017 oday will be sunny and a little breezy as high pressure builds into the region. A cold front moved across the Upper Midwest last night and led to a brief period of gusty winds. Overnight lows could be a bit cooler in the typical cold spots of eastern Mn and western WI, depending on the timing of the southwesterly winds.
The GFS interestingly tries to sneak some moisture northward toward the Four Corners as the subtropical plume is tugged northward by this trough, however no precipitation is expected over the south.
903 AM EST Thu Nov 30 2017 Surface ridging extending down the eastern seaboard will maintain a gentle northeast wind today. A weak trough sliding across the deep south will shift the ridge closer to the area tonight and weaken winds even more. Northeast winds will diminish some as high pressure shifts closer to the area.
1100 AM EST Thu Nov 30 2017 Fairly benign weather continues as high pressure sets up easterly flow across the region. Weak ridging across the Gulf of Mexico is leading to north- northwest flow aloft across the peninsula, and ushering in a drier and more suppressed atmosphere aloft. The low level boundary that has been draped across the region is washing out, with RUC analysis showing drier air working in even in the low levels.
853 AM EST Thu Nov 30 2017 Cold front Thursday/early Thursday night. High pressure for the weekend.
548 AM EST Thu Nov 30 2017 A cold front arriving from the west will bring clouds and showers today.
Temperatures inland will climb into the upper 70s to around 80 degrees, with coastal areas in the lower 70s due to the onshore flow.
602 AM EST Thu Nov 30 2017 High pressure will crest over the area this morning before retreating into the maritimes this afternoon. A weak cold front will push east through the region tonight accompanied by some light rain and snow. High pressure and drier air follows late Friday into the upcoming weekend.
655 AM EST Thu Nov 30 2017 A cold front, will bring showers to the area this afternoon and evening.
High pressure has set up just to our south so we can expect deep westerly flow and good mixing.
SHORT TERM (Today through Friday): A dissipating weak cold front currently splits the CWA in half with dewpoints in mid 40s to around 50 across the northern and western ranchlands and dewpoints in the low to mid 60s across the Rio Grande Valley. Another surge of high pressure arrives tonight bringing slightly drier air into the region.