Aikyam-Lab/Synoptic-Bench huggingface dataset:
The cold front that moved through central Texas yesterday evening and early this morning is now located well south of the region. Behind the front, northerly winds and cloud cover have kept temperatures much cooler when compared to yesterday.
342 AM CST Fri Feb 3 2017 An upper ridge axis extends up across the Intermountain West this morning with a nearly flat ridge extending eastward across the rest of the country. A couple upper troughs move ashore the West Coast over the next few days but have little impact on the region as they move east. Another trough will move down out of Canada and dig across the Eastern U. and will send a cold front southward. Should be similar to that again today as latest guidance looking cooler than previous runs. Warmer temperatures return Saturday with the return of a south wind.
855 PM PST Thu Feb 2 2017 Thick high clouds and increasing mid level clouds streaming from the west associated with a weak u/l trough further west.
325 AM CST Fri Feb 3 2017 Extensive long wave trough continues to keep a zonal flow over the area. This is responsible for the very sluggish forward movement of cold fronts in our area.
With the high pressure ridge moving over the area tonight and Friday, we should cool back through the single digits above zero over MN and a few single digits below zero over west central Wisconsin.
/ISSUED 858 PM CST Thu Feb 2 2017/ A cold front crossed the region earlier today and is now about 20 miles off the coast. Cooler and drier air is filtering into SE TX with temperatures in the upper 40s north to the mid 60s coast.
322 AM CST Fri Feb 3 2017 A ridge of high pressure will translate south and east over the Middle Mississippi Valley area today.
307 AM EST Fri Feb 3 2017 Cooler than average temperatures will continue into the weekend.
High pressure across the northern plains will linger there through early Friday and then it will shift to the Ohio valley late Friday.
Ridging will build into the southern Appalachians tonight with dry and cold air-mass.
135 AM CST Fri Feb 3 2017 High pressure is building into Middle Tennessee this morning from the northern Plains, putting the mid state under a cold northerly flow as mid-level ceilings continue to stream across the area. The ridge should shift east of the mid state by Saturday afternoon and usher in our next return flow.
1216 AM EST Fri Feb 3 2017 A wave of low pressure and its associated cold front will move further offshore overnight. High pressure will gradually build into the area, bringing much colder temperatures across the eastern Carolinas Friday and through the weekend.
1247 AM EST Fri Feb 3 2017 Cooler than average temperatures will carry into the weekend. Dry weather will last through Saturday under building high pressure. Fries High pressure at the surface will restore dry conditions to much of the area. Temperatures will be about 5-10 degrees below freezing Friday and Friday night.
A strong inversion was located above 850mb, with high pressure aloft. The inverted trough along the coast this morning will move inland this afternoon.
Temperatures are cool with generally 30s across the lower elevations. high pressure over the western states will build east into Colorado. Northerly flow at the surface will keep slightly cooler air in place, with daytime highs a few degrees cooler than what we have seen the past few days. Colorado will be stuck in between upper high pressure over the northern Rockies and upper low pressure over the southern Rockies for the next several days.
Enough drier air has moved into in the low levels to limit concerns for widespread MVFR or lower ceilings. Ridging over the East Coast and an elongated trough axis extending from Ontario to Texas have kept our region under an area of moist isentropic ascent. As the southern end of the trough begins to cut off from the main flow, rain chances will be reduced from north to south by tomorrow morning.
351 AM MST Tue Nov 8 2016 Water vapor imagery showing strong ridging aloft over Great Basin and extending well across the Northern Rockies. There is some high level moisture which is spilling over the ridge which will work into Northern Colorado today under a North to Northeast flow aloft. Temperatures expected to be only a degree or 2 warmer over yesterday's readings. dry and warm atmosphere will dominate the region beneath a strongly positive tilt upper ridge for one more day. models show the upper ridge undergoing a sizable adjustment as a closed upper lower continues to migrate westward along the U. This causes the ridge axis to shift west over the Great Basin which causes the upper level flow east of the Rockies to turn northwesterly.
535 AM EST Tue Nov 8 2016 After a cool start, another mild day is in store ahead of an approaching cold front. Showers will still be likely in the southeast ridges Wednesday morning as the cold front exits east. Showers will gradually diminish through the day, but colder low level northwest flow will keep a low chance for showers into early evening in the ridges. High pressure and anticyclonic flow will end showers quickly Wednesday evening, with gradual clearing.
624 AM EST Tue Nov 8 2016 Dry high pressure will will persist over the area through Tuesday.
Water vapor imagery showing strong ridging aloft over Great Basin and extending well across the Northern Rockies. There is some high level moisture which is spilling over the ridge which will work into Northern Colorado today under a North to Northeast flow aloft. Temperatures expected to be only a degree or 2 warmer over yesterday's readings. The dry and warm airmass associated with a strong positively tilted upper ridge will dominate the region for one more day. Models then show the upper ridge undergoing a size reduction Wednesday night with a closed upper low over wrn Texas migrating westward along the U. This causes the upper ridge to shift west over the Great Basin causing the flow aloft east of the Rockies to turn northwesterly.
Upper high/ridge builds over the Great Basin region and southwestern states today and then across the northern and central Rockies tonight and Wednesday. a closed upper low develops over Oklahoma and the Red River Valley/northwest Texas tonight and then tracks west and south across the Permian Basin and far west and southwest Texas Wednesday. The Panhandles will be between the closed upper low to the south and west and the upper ridge to the north and west Wednesday.
Beginning today, as an upper-level ridge of high pressure re- asserts itself throughout most of the western states, multiple periods of mid- to upper-level cloudiness will stream up and over the crest of the ridge, which is expected to bring periods of partly cloudy skies over northeast Montana to an otherwise mainly sunny and warm forecast through at least most of this week.
750 AM EST Tue Nov 8 2016 After a cool start, another mild day is in store ahead of an approaching cold front. Showers will still be likely in the southeast ridges Wednesday morning as the cold front exits east. Showers will gradually diminish through the day, but colder low level northwest flow will keep a low chance for showers into early evening in the ridges. High pressure and anticyclonic flow will end showers quickly Wednesday evening, with gradual clearing.
Upper level ridge will continue to build over the Intermountain West through the day. Patchy fog will form this morning in the Lower Treasure and Upper Weiser Basin under a developing inversion, but will burn off well before noon.
In the low levels of the atmosphere, an area of high pressure will be centered over the southeastern United States this afternoon. In the mid levels of the atmosphere, an area of high pressure will be centered over the Florida peninsula today. In the upper levels of the atmosphere, a ridge of high pressure will be located over the east central Gulf of Mexico this afternoon.
This is expected to lead to a closing off upper low over the Trans Pecos by later tonight, which eventually should end up on the other side of the Rio Grande in northwestern Chihuahua. Today otherwise will be a cooler day with gusty northerly winds as surface ridging presses into the area. RMcQueen Models are in good agreement with retrograding an upper low back to our west over the next few days. The upper atmosphere will remain relatively stuck in this pattern resembling a rex blocking pattern. The blocking will break down this weekend as the upper low lifts out over West Texas.
A cold front will move southeast across our region this afternoon and evening, accompanied by scattered showers. Pops today will remain in the chance category, with the highest chances occurring along the front across southwest Indiana and southern Illinois late this afternoon. Cooler north winds will result in highs around 60 degrees. Forecast lows will be in the mid to upper 30s, however it is quite possible some outlying areas will dip below freezing.
656 AM EST Tue Nov 8 2016 High pressure builds over the area today.
911 AM CST Tue Nov 8 2016 Only significant morning update was to bump up sky cover a little as high clouds continue to spill over the upper ridge. Southerly winds will begin ushering in warmer air. Highs today will be a few degrees warmer than yesterday with an upper level ridge nosing in. The upper level ridge peaks over North Dakota Wednesday. This will bring slightly cooler temperatures in.
Southerly winds will begin ushering in warmer air. Highs today will be a few degrees warmer than yesterday with an upper level ridge nosing in. The upper level ridge peaks over North Dakota Wednesday. This will bring slightly cooler temperatures in.
247 AM PST Tue Nov 8 2016 High pressure and offshore flow will keep skies mostly clear through the period along with above normal maximum temperatures. the offshore flow has chased away the low clouds that formed near the beaches last evening. A skinny elongated ridge will sit over the area and will keep 500 mb hgts near 584 DM or about 6 DM above normal. Some sort of ridge will be over the area through the period although its axis will be shifting around.
1027 AM EST Tue Nov 8 2016 Pressure gradient will continue to relax as high pressure settles over the southeast U.
A cold front will approach late in the TAF period with a few light showers possible at KTRI and KTYS.
859 AM EST Tue Nov 8 2016 High pressure lingers much of today. Cold front passes late tonight with showers lingering into Wednesday.
Low cigs, ranging from MVFR to LIFR, currently affecting most terminals behind a cold front that continues to push south this morning. INK and PEQ could be right on the edge of the low clouds this afternoon but will return them to VFR during this time for now. /issued 307 AM CST Tue Nov 8 2016/ A cold front is moving through the area this morning bringing cooler temperatures in its wake. The associated upper trough will actually deepen into a low, and become disassociated with the prevailing flow and retrograde west under an amplifying ridge over the Rockies.
504 AM CST Tue Nov 8 2016 Relatively quiet weather expected today as high pressure builds into the region. Good radiative conditions tonight will result in temperatures dipping below freezing in some locations.
558 AM CST Tue Nov 8 2016 /12Z TAFS/ Widespread stratus will prevail across the terminals today, behind a cold front currently moving across the area. A cold front is moving south across the area and will clear far southeast counties shortly after sunrise. The front will bring cooler temperatures to the area today, along with widespread low clouds that will linger through tonight. Aloft, a northeast to southwest oriented upper level trough will remain over the area today and will aid in scattered showers and isolated thunderstorm development, mainly this afternoon. Temperatures will be chilly today, with highs ranging from the lower 60s north, to the upper 60s along the I-10 corridor. Lows tonight will be in the lower 50s.
/Issued 153 AM CST Tue Nov 8 2016/ Upper troughiness prevails over the Central CONUS, sandwiched between ridges over the West and East. The tail end of this trough will merge with the remnants of the southern stream system /this week's rain maker/ and slide south and eventually west with time, forming a new closed low over the Southwest in a split flow blocking pattern by Wednesday. Will maintain chance pops mainly north of I-40 thru the morning close to the upper trough axis, then decreasing pops in the afternoon as the wave energy over the central part of the country splits off from the northern stream and begins its trek southwestward, effectively shearing out over our area.
828 AM EST Tue Nov 8 2016 Dry high pressure will will persist over the area today.
512 AM CST Tue Nov 8 2016 The upper level trough axis is starting to work into northwestern Missouri early this morning. Strong subsidence in the wake of that upper trough will clear skies out later today and tonight. At the surface, high pressure will build into the region. While the high won't be centered right over the forecast area, it will allow winds to become light or even calm for much of the area. More widespread frost is likely across northwestern Missouri, closer to the center of the high and more likely to see calm winds and ideal radiational cooling conditions.
206 AM PST Tue Nov 8 2016 High pressure will prevail for most of the upcoming week with dry conditions, light winds and above average daytime temperatures. High pressure will remain in place from the southern half of California to the Great Basin for the next few days, keeping dry and warm conditions over the region.
After a quiet night with increasing clouds, a cold front will approach and move through central Indiana on Tuesday bring rain chances to the area Tuesday and Tuesday night. Dry weather is expected tonight as high pressure continues to move off to the east. Clouds will increase through the night from the west as an upper wave and surface cold front make their way east out of the eastern plains. With southerly component flow and increasing clouds low temperatures should be around 10 degrees warmer than last night in the upper 40s to around 50. A cold front will move into the area on Tuesday along with an upper wave. The edge of the upper ridge will move into the area after that bringing dry weather and cooler than normal temperatures on northwest flow.
540 AM CST Tue Nov 8 2016 Updated aviation section for 12z taf issuance A cold front will move southeast across our region this afternoon and evening, accompanied by scattered showers. Pops today will remain in the chance category, with the highest chances occurring along the front across southwest Indiana and southern Illinois late this afternoon. Cooler north winds will result in highs around 60 degrees. Forecast lows will be in the mid to upper 30s, however it is quite possible some outlying areas will dip below freezing.
/12Z TAF/ Water vapor imagery shows broad troughing over much of Texas this morning which is support convection mainly over central Texas. /ISSUED 358 AM CST Tue Nov 8 2016/ A long wave trough over the plains and western Texas will keep a southwesterly flow aloft over SE Texas today through Wednesday. In the meantime, a cold front at the surface will move across SE Texas later today and off the coast tonight. Drier and cooler air will filter into the area later tonight and Wednesday and lead to below normal temperatures both periods. Both the GFS and ECMWF develop an upper low over the El Paso area by Wednesday night.
Highs will be a bit cooler than what we've experienced the past few days, but readings in the 50s and low 60s are still above normal for this time of year. Upper level ridging builds back into the Dakotas while 925/850 mb temps soar into the teens Celsius.
600 AM EST Tue Nov 8 2016 High pressure lingers much of today. Cold front passes late tonight with showers lingering into Wednesday.
Scattered showers and isolated thunderstorms remain possible throughout the day today as a cold front makes its way across the region from northwest to southeast. An upper level low develops over northwestern Mexico into the far southwestern states while a cold front moves across our area today.
Continued warm and dry next several days under persistent upper ridge. Some clouds in northern areas Wednesday as a minor short wave trough moves by. Upper ridge will flatten on the weekend.
Tonight, a cold frontal passage will occur and there will be just enough forcing along the boundary to produce a few more showers overnight.
Ridging over the East Coast and an elongated trough axis extending from Ontario to Texas have kept our region under an area of moist isentropic ascent. As the southern end of the trough begins to cut off from the main flow, rain chances will be reduced from north to south by tomorrow morning.
The large-scale ridge of high pressure continues over the Northern Rockies through this work week.
957 AM EST Tue Nov 8 2016 High pressure will persist across the region through tonight.
Chattanooga Airport, TN 71 51 64 43 / 0 20 10 0 Knoxville McGhee Tyson Airport, TN 70 50 58 39 / 0 30 10 10 Oak Ridge, TN 70 50 58 38 / 0 30 10 0 Tri Cities Airport, TN 68 45 53 36 / 0 60 30 10.
603 AM CST Tue Nov 8 2016 The cold front will make steady progress across Illinois from NW to SE today. The high resolution models are pointing toward an enhanced area of frontogenesis developing after sunrise this morning roughly along the I-72 corridor. Some sunshine this afternoon in our W-NW counties could help those temps rebound farther into the lower 60s.
729 AM EST Tue Nov 8 2016 Aviation A cold front dropping southeast through the Lower Peninsula today will be some light rain showers to most areas. On Wednesday we should see a decrease in clouds as high pressure builds in.
1040 AM EST Tue Nov 8 2016 A cold front will cross the area late this afternoon into tonight, producing widespread showers.
937 AM EST Tue Nov 8 2016 High pressure remains in control of the region today. A cold front will move through the area Wednesday.
945 AM EST Tue Nov 8 2016 High pressure will hold over the region today. A cold front and upper level disturbance will approach from the northwest tonight, and then sweep through the area on Wednesday.
647 AM EST Tue Nov 8 2016 A cold front will cross the area late this afternoon into tonight, producing widespread showers.
A cold front is moving south across the area and will clear far southeast counties shortly after sunrise. The front will bring cooler temperatures to the area today, along with widespread low clouds that will linger through tonight. Aloft, a northeast to southwest oriented upper level trough will remain over the area today and will aid in scattered showers and isolated thunderstorm development, mainly this afternoon. Temperatures will be chilly today, with highs ranging from the lower 60s north, to the upper 60s along the I-10 corridor. Lows tonight will be in the lower 50s.
647 AM EST Tue Nov 8 2016 Showers are expected in the area today as a cold front moves through. High pressure will build into the Midwest Wednesday providing fair weather along with a little cooler temperatures. Highs today will be in the upper 50s and lower 60s with lows tonight in the lower 40s. Post frontal strato cu should gradually mix out Wednesday as ridging builds in.
745 AM EST Tue Nov 8 2016 High pressure will persist across the region through tonight.
930 AM EST Tue Nov 8 2016 High pressure will move south of the area and weaken today and tonight. Low pressure and a cold front will cross the region Wednesday.
417 AM MST Tue Nov 8 2016 Sprawling upper ridge moves from the Great Basin to central plains this period.
Stacked upper low over central Kentucky this morning will move little during the day but begin to lift northward tonight and be centered over east central Indiana by 12z Saturday as it heads toward lower Great Lakes.
747 AM EDT Fri Sep 30 2016 Fair and dry weather continues as high pressure over Quebec remains over the North Country. A closed upper low over the Ohio valley will linger there through Saturday.
627 AM CDT FRI SEP 30 2016 A closed and nearly stacked low pressure system was centered over TN/KY early this morning. As long as the low pressure system remains nearby, sfc winds will retain a northerly component and substantial cloud cover will be present, particularly over the eastern part of the CWA which will be closer to the low pressure system.
High pressure and the persistent cooler drier air over the region will again promote quiet and near normal conditions today. However, the combination of slightly higher dew points today, less wind, continued very dry ground conditions, and sunny skies, should result in temperatures being close to, if not a degree or two warmer than, yesterday's highs.
1002 AM CDT FRI SEP 30 2016 Upper low continues to spin near Louisville this morning, with periodic showers pushing westward into Illinois. No real change expected in this pattern expected through this evening, before the low finally starts to move northward after midnight. 07z/2am water vapor imagery shows center of persistent upper low centered over central Kentucky. Scattered showers continue to pivot around the low, with the most concentrated area of rain immediately to the north of the center over southern Indiana/far northern Kentucky. With upper low slowly lifting back northward and lapse rates steepening, MUCAPE values are progged to reach the 600-1000J/kg range across the east later today. Upper low will continue to lift northward into northern Indiana by Saturday evening.
An upper level low will bring clouds and showers to Western Washington over the weekend. Cool showery weather is on tap for the weekend from an upper level trough.
Upper low continues to rotate right over Louisville this hour. Deep upper low currently lifting slowly through central Kentucky, slinging just enough moisture around onto its north and west side to bring a decent batch of showers into the I-65 corridor in north central Kentucky and southern Indiana. This upper low will keep our weather chilly and unsettled well into the weekend as it takes its sweet time lifting through Kentucky today, and then through Indiana tonight and Saturday. Expect rounds of mainly scattered showers as different impulses pinwheel around this upper low through the period. POPs will be in the chance range on Saturday, with a more pronounced taper from 50% near the Ohio River to 30% along the Tennessee border, as the upper low continues its trek north of the area.
The highest precipitable water values will be in the south though as some drier air aloft has filtered in over the north. The weakening frontal trough approaching will cause surface winds to diminish so a sea breeze will develop and provide added lift over the east side of the peninsula.
With temps at 10 am running mainly just a couple degrees warmer than this time yesterday, Expect aftn high yesterday in the upper 70s to near 80, to increase slightly to around 80 to the lower 80s this aftn. on the W side of a stationary upper level low pressure system over KY. /issued 500 AM CDT FRI SEP 30 2016/ Little has changed over the last day or so with the 1034mb high centered in just North of Lake Superior and the upper low over IN/KY and appears to be drifting back NW. The winds will be lighter than yesterday as the high has drifted Eastward, but we will see more below average readings for today.
701 AM EDT Fri Sep 30 2016 A large upper level low will remain in place over the Ohio Valley today, and then begin lifting north through the Great Lakes this weekend. Under the influence of this upper low expect cool and occasionally rainy conditions. Chances for rain will begin to diminish on Saturday, as the low gradually begins to move to the northeast.
748 AM EDT FRI SEP 30 2016 Aviation Low pressure will slowly spin across Lower Michigan bringing wet weather through the weekend. Fair weather will finally arrive early next wee as the low finally moves away. It is forecast to move north back into Lower Michigan by the end of the period then finally get kicked east as longwave trough moves into the western CONUS.