Aikyam-Lab/Synoptic-Bench huggingface dataset:
420 AM CDT Tue Aug 22 2017 (Today and Tonight) An upper trough will move east across the Great Lakes today, and trailing portion of associated cold front will push south across much of Oklahoma and the Texas Panhandle. Weak northerly flow aloft will develop over our area, as an upper high becomes centered over far northern Mexico just south of El Paso this afternoon and tonight. With weak northerly flow aloft and expected convective development along the cold front, the boundary will make southward progress into our northern counties (Big Country area) tonight. Lows tonight are expected to be in the lower to mid 70s.
Troughing will mainly rule in the East, with ridging in the West.
253 AM CDT Tue Aug 22 2017 At 2 AM, a cold front extended from Green Bay to Dubuque Iowa. A secondary cold front extended from just east of Marquette Michigan southeast to Des Moines. 00z models are in good agreement that this secondary cold front will move through the Upper Mississippi River Valley dry this morning.
1201 AM CDT Tue Aug 22 2017 A cold front currently extends from low pressure over northern Wisconsin into the central Plains. Based on radar trends and model output, have kept PoPs in the low chance category across much of the area through the evening, then have spread likely to categorical PoPs from west to east overnight. Widespread showers and thunderstorms will be ongoing early Tuesday morning, before the cold front settles southward to the I-70 corridor by late afternoon. Due to extensive cloud cover and rainfall, high temperatures will remain in the lower 80s. Once the front pushes into the Ohio River Valley, a cooler/drier airmass will take hold across the Midwest for the balance of the week.
A dry push of boundary layer air characterized by dewpoints in the 50s and upper 40s Tuesday night will will advance into the lower plains, creating a zone of baroclinicity immediately south of our area. The model consensus maintains a somewhat seasonal temperatures spread, with highs just a few degrees below normal for late August, in the mid 80s, and lows generally in the low 60s. The main challenge will be if/when/how long MVFR or lower ceilings will develop immediately behind cold front early in the morning.
A decrease in monsoon moisture today will limit showers and thunderstorms to mainly the higher terrain of Gila County through Tuesday.
1222 AM CDT Tue Aug 22 2017 Main impact for this TAF cycle will be an approaching cold front Tuesday afternoon with associated northerly winds and convection. A cold front will move into the area tomorrow morning, with additional storms expected to redevelop near the front tomorrow afternoon.
1130 PM MDT Mon Aug 21 2017 West-northwest flow aloft prevails this afternoon under the influence of a broad mid-upper level northern CONUS trough. The short range models and ensembles are in good agreement progging eastward progression of the northern CONUS trough and arrival of a mid/upper level ridge Wednesday.
445 AM MDT Tue Aug 22 2017 Cold front has pushed through all of the southeast plains early this morning with isolated thunderstorms still ongoing along the Raton Ridge region. monsoon moisture and weak disturbances continue to circulate within the upper ridge axis aloft across most of southern CO where precipitable waters from the AMSU SSM/I show values ranging from 100-130% of normal with highest values across the southern and southeast portions of the area. however surface heating in combination with weak disturbances rotating northward within the upper ridge across the mountains will trigger another round of scattered to numerous showers and thunderstorms over the mountains. Locally heavy rain will be the primary storm threats given light flow aloft within the upper ridge.
313 AM CDT Tue Aug 22 2017 A cold front over northwestern Kansas, will continue pushing southward into southern Kansas this morning, then out of south- central/southeast Kansas early this afternoon.
1150 PM MDT Mon Aug 21 2017 06Z TAF CYCLE Weak upper low/trof lingering over nrn NM thru 12Z with isold to sct showers and tstms favoring the ne third to half of NM. The best chances for storms on Tuesday will be across eastern portions of the state, where a backdoor cold front will push in and enhance activity.
504 AM EDT Tue Aug 22 2017 WV imagery and RAP analysis indicated a mid/upper level trough from the srn portion of Hudson Bay through nw Ontario to the Upper Mississippi Valley. At the surface, a cold front extended through the cntrl U. from low pressure over ern Lake Superior. Even with lingering clouds and wind, temps over the interior west should drop off into the mid and upper 40s while readings in the lower to mid 50s prevail closer to the Great Lakes and over the east.
627 AM EDT Tue Aug 22 2017 High pressure centered off the coast will continue to ridge into the area today.
312 AM EDT Tue Aug 22 2017 A strong cold front will bring a line or a few broken lines of showers and storms to the region today. A cool, dry pattern will start Wed in the upper troughing behind the front.
158 AM MDT Tue Aug 22 2017 High clouds are streaming into the region through northwest flow, as an upper level ridge builds over the northwestern CONUS. Upper ridge will keep weather mild and mostly dry through Wednesday. Highs today will be in the low to mid 80s, with highs Wednesday warming near 90.
443 AM MDT Tue Aug 22 2017 Stratus has developed in southerly upslope flow along the Cheyenne Ridge and southern Laramie Range, but so far no fog has been observed in these areas. An upper level ridge will build over the western CONUS today, and over the Rockies by Wednesday. Temperatures should increase a few degrees each day as the ridge builds, and it looks like precip chances will increase as well. For today, the dry airmass evident on current water vapor imagery will remain overhead, although some moisture to our southwest may reach the higher mountain peaks of south-central WY.
146 AM EDT Tue Aug 22 2017 High pressure moving off the Mid Atlantic coast will bring a warm and increasingly humid southerly flow to the region into Tuesday. A strong cold front will move through the region late Tuesday and Tuesday night. Cooler and drier conditions will return for the second half of the week. Activity continues to weaken overall but still some local heavy rainers over the lower Susq River Valley early tonight. Patchy fog expected especially over portions of the Lower Susq. Mins will range from the lower 60s north to the lower 70s southeast. The front should bring in much cooler weather Tuesday night.
339 AM PDT Tue Aug 22 2017 An area of low pressure will remain anchored off the southern California coast through Wednesday to continue the chance of mainly afternoon showers and thunderstorms over the Sierra each day.
225 AM CDT Tue Aug 22 2017 As a cold front pushes through eastern Nebraska and western Iowa, it is ushering out showers and thunderstorms and bringing in a drier airmass. Subjective 00Z upper-air analysis indicates broad upper- level trough over the upper Midwest, accompanied by an 80-95kt upper- level jet streak from the eastern Dakotas into northern ON. An 850mb low was centered on the northern ON/MB border, with a trailing cold front through MN/NE/western KS, and with moisture pooled ahead of the front.
428 AM EDT Tue Aug 22 2017 High pressure centered off the coast will continue to ridge into the area today.
High temperatures today and Wednesday will run several degrees above normal throughout the Northern Rockies, as a ridge of high pressure continues to build overhead. The high pressure will begin to break down Wednesday night as a trough of low pressure moves inland from the Pacific Northwest, allowing for a southwesterly flow to develop over the region.
The highest coverage will develop this afternoon along the interface between the low level moisture and best warming (e. On Fri the flow aloft will become more wnw as an upper level high begins to build fm the swrn US into the Great Basin. The ECMWF shows a weak feature embedded in the flow along with an increase in moisture thus may see a better chc of storms across the plains in the aftn with wdly sct activity over the higher terrain. By Sun and Mon the flow aloft will become more nly as an upper level high strengthens over the Great Basin.
652 AM EDT Tue Aug 22 2017 High pressure moves off to the east today. A strong cold front will move across the region tonight and early Wednesday.
1127 PM PDT Mon Aug 21 2017 A weak upper low just west of Point Conception will maintain overnight low clouds and fog, along with cooler than normal temperatures through late in the week. As the upper low moves inland.
143 AM EDT Tue Aug 22 2017 A cold front will push through the area tomorrow triggering showers and thunderstorms. String cold front and upper wave approaches for Tuesday. By Wed night, the upper-lvl trough will slowly swing across the region and NW flow at mid-lvls will prevail in the wake of the a secondary fropa. This NW flow will bring about a 10 degree temp difference to the region on Wed and as the upper low will be slow to pass, the chance for precip on Wed will prevail (lake enhanced, however moisture will be somewhat limited) NW flow at mid-lvls will continue through the night and CAA will continue to funnel into the region. This will result in sfc temps reaching the low 50s/upper 40s by sunrise on Thurs.
Muggy and warm in the morning, with calm winds and low temps a few degrees warmer than normal. /NF/ Prior discussion below: Tonight through Tuesday: A strong mid level ridge will maintain the hot and humid airmass over the ArkLaMiss in the near term. There is sufficient instability (ML CAPE near 3500 J/KG) over northwest/north central portions of the forecast area for scattered, strong thunderstorm activity, and seabreeze convergence related deep convection is working toward the Highway 98/Pine Belt area of south central MS. There may be a limited threat for heat danger Tuesday as well given little change in the pattern/airmass, but it appears that slight weakening of the mid level ridge may help to keep the low level thermal ridge/sfc drybulb temps a degree or two cooler.
A cold front will bring a northerly wind shift through the terminals this afternoon and evening, although the front may become masked by t-storm outflow. Upper level flow quickly transitions to northwest on Tuesday as ridge axis begins to amplify across the desert southwest. The upper flow also weakens during this time and veers to the north/northeast as the midlevel ridge axis briefly builds across the area.
A strong upper trough will move across the Great Lakes with the associated cold front moving toward the lower Ohio and Tennessee Valleys late today and tonight. This trough will suppress the upper ridge over the region southward allowing for increasing southwesterly flow pulling moisture and instability north.
An upper level low will continue to push northwestward through the central Gulf, but deep layer ridging will generally persist to its northeast across our area. Overnight lows will be in the lower-mid 70s inland, with upper 70s along the Gulf Coast. With the return to slightly wetter conditions, afternoon temperatures are only expected to climb into the lower 90s, instead of the mid 90s from the past several days.
Highs will continue to be in the middle 90s to near 100 with lows Wednesday morning in the lower to middle 70s for the most part.
400 AM PDT Tue Aug 22 2017 Weak low pressure off the central California coast will drift slowly westward today with high temperatures for inland areas returning to near average.
153 AM EDT Tue Aug 22 2017 Quiet weather tonight under a mild humid southwest flow with high pressure off the mid-Atlantic coast. Very warm temperatures continue on Tuesday, but an approaching cold front will bring showers and thunderstorms mainly in the afternoon and evening, tapering off Tuesday night. The remainder of the week is shaping up to be cooler and drier with below normal temperatures.
The focus area for thunderstorm activity shifts north to the southern Great Basin today, then returns to much of the region Wednesday as an area of low pressure approaches.
410 AM CDT Tue Aug 22 2017 Cold front is moving into northwest part of forecast area at this time, with continued southward movement expected today. Threat for showers and thunderstorms will continue for the next several days, with western and northwestern sections being favored, as northwest flow aloft will provide opportunities for convection to move in from the higher terrain, while southeast low-level flow will keep moisture and instability maximized over western sections.
355 AM CDT Tue Aug 22 2017 A cold front has passed through the area overnight, and skies have mostly cleared in its wake. Winds will remain northerly through the day today as high pressure builds into the area. Lows should dip into the low to mid 50s, and I wouldn't be surprised if a few spots even make it into the 40s! Dry air should preclude fog development despite relatively light winds and clear skies.
340 AM CDT Tue Aug 22 2017 Our attention now turns to a rather strong cold front pushing southeast through the Midwest and Plains this morning.
/Issued 750 PM EDT Mon Aug 21 2017/ Weak upper ridging persists this afternoon across the region, however deepening moisture has resulted a slightly better coverage of convection. Should see a bit more coverage tomorrow afternoon and evening as the upper ridge breaks down and moisture continues to increase. Convection diminishes tomorrow evening, but approaching cold front brings POPs back up between midnight and sunrise across the north. BDL Models in general agreement with the eastern trough deepening through the week. This will push a cold front across the CWA Wednesday and becoming stationary across south Georgia for the remainder of the week.
The outflow will have moved through the CWA by later this morning and the cold front will pass through St. This combined with north-northwest winds in the wake of the front and the associated advection of cooler/drier air, will result in highs generally 10+ degrees cooler in most areas than yesterday. Clouds will continue to clear across the southern portion of the area this evening as the upper trof deepens. Anomalously strong high pressure center will very slowly migrate from the Upper Midwest to the Great Lakes, eventually into the New England region. Gosselin Cold front beginning to move into Missouri as of 05z. Rain to taper off by mid to late morning as cold front exits. SPECIFICS FOR KSTL: Cold front beginning to move into Missouri as of 05z. Rain to taper off by 19z Tuesday as cold front exits.
411 AM EDT Tue Aug 22 2017 High pressure moves off to the east today. A strong cold front will move across the region tonight and early Wednesday.
Temperatures are expected to remain with highs in the mid 80s and lows in the lower 60s.
222 AM CDT Tue Aug 22 2017 As a cold front pushes through eastern Nebraska and western Iowa, it is ushering out showers and thunderstorms and bringing in a drier airmass. Subjective 00Z upper-air analysis indicates broad upper- level trough over the upper Midwest, accompanied by an 80-95kt upper- level jet streak from the eastern Dakotas into northern ON. An 850mb low was centered on the northern ON/MB border, with a trailing cold front through MN/NE/western KS, and with moisture pooled ahead of the front.
A strong cold front will bring a line or a few broken lines of showers and storms to the region today. A cool, dry pattern will start Wed in the upper troughing behind the front.
High pressure will provide dry weather and warmer than average temperatures today. An upper level system will approach the region Wednesday bringing cooler onshore flow and a few showers to the coast.
Besides the fog, surface ridging will begin to move east of the area allowing winds to become southwesterly sustained up to 10kts.
Drier weather returns late week as high pressure strengthens and provides high temperatures reaching back into the mid to upper 90s across western Nevada. Shower and thunderstorm coverage will be at its peak today as an upper level low draws ample moisture in the region and provides enough instability and forcing to enhance the threat for flash flooding through this evening. Currently, a band of light to moderate showers is working its way across Mineral county to just south of the Tahoe Basin in association with deformation along the northeast quadrant of the low. The potential for flash flooding is lower confidence in northern Lassen, northern Washoe, and Pershing counties as this activity will largely be forced by the low's deformation in an area of weaker instability.
Plenty of moisture and elevated instability continues across NorCal as the upper low remains off the central California coast. Ripples embedded in the flow around the low continue to spark showers and thunderstorms - one moved across last evening and another is moving up from the southeast early this morning. Breezy winds likely through the Delta with cooler temperatures in that vicinity.
355 AM CDT Tue Aug 22 2017 The rest of the overnight hours looks like it will remain to be mild and muggy with temps not getting out of the lower 70s. As a trough digs across the Great Lakes today, it will weaken the ridge across the Southeast. Combined with southwesterly winds returning moisture to the area and daytime highs in the lower 90s, isolated diurnal convection is possible. As the cold front encroaches tonight, scattered showers and thunderstorms will spread into the TN Valley. As the front pushes through the forecast area, expect showers/storms to taper off Wednesday night as drier and cooler air begins to filter in.
A cold front is set to enter Oklahoma this afternoon, bringing cooler temperatures and a round of showers and thunderstorms.
Temperatures expected to fall into the lower 30s over interior se Ga late tonight. Rain will ending late tonight/early Monday morning over se Ga likely before any freezing temperatures occur so only liquid precip expected at this time. Conditions will be monitored closely overnight as a slim chance of freezing rain or drizzle still exists for parts of se Ga. Cold front across ne Fl just north of GNV will shift south tonight with NNE winds. NNE winds increasing over the waters north of a cold front will reach 15-20 knots with seas building to 6 feet offshore by morning.
KCDS has already seen the low clouds clear and will remain VFR with only passing high clouds.
Will take another look at the lows in a few hours to get a better feel of the temperature trends. Once the mid-level wave clears out of the region by Monday morning, high pressure will regain full control of the region as it nears closer from the NW. the temperatures will bottom out near or just below 0 in some locations in the north, and in the low single digits across the remaining CWA. A series of ridges of high pressure will be the primary weather makers in the extended across eastern Kentucky.
243 PM PST Sun Dec 31 2017 High pressure over the region is beginning to break down with a slight chances for a light rain shower in the Sierra tonight.
539 PM CST Sun Dec 31 2017 Arctic high pressure will slowly build south across the northern Plains tonight and then the Corn Belt region on Monday. With the high pressure still well off to the north, a persistent north wind will continue. High temperatures on Monday will likely not warm out of the single digits across central Missouri, with highs only in the lower to perhaps middle teens across far southern Missouri. If there is any good news, wind speeds will start to decrease in the afternoon as that high pressure continues to approach from the north.
Cold front has backed to the east slopes of the central mt chain at 23Z. Otherwise a relatively light east wind likely to develop at KABQ aft 01/01Z with potential for some of the low clouds to obscure the Sandia/Manzano mts. The low clouds should diminsh aft 01/18Z.
514 PM CST Sun Dec 31 2017 Broad upper troughing remains from the Great Lakes into the Plains with the Polar low remaining over southeast Ontario/Quebec. At the surface, high is centered over southern SD with cold front well off of the TX Gulf coast. Frigid airmass will slowly push east after Mon, with highs by Wed expected to be near the freezing mark for most of the area, which is still around 10 degrees below normal. These extended periods will start with a deep upper trough over eastern CONUS with nw flow situated over the Plains.
Chattanooga Airport, TN 18 30 12 32 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 16 27 7 29 / 0 0 0 0 Oak Ridge, TN 17 29 7 29 / 0 0 0 0 Tri Cities Airport, TN 12 23 4 27 / 0 0 0 0 NC.
Patchy fog may continue to develop each morning but the extent should be limited to near water ways thanks to all the high clouds.
Temperatures at 5500+ feet are about 30 degrees warmer than at 3000 feet this evening. The warmer air west of the divide will keep wind potential in check.
mainly along north of I-80 and over the ridges as the main upper level trough axis drives through the region. With winds aloft, west of north-west, expect most of the snow showers Monday to be over the favored lake band locales and higher ridges.
425 PM MST Sun Dec 31 2017 Dry northwest flow aloft continues as forecast area remains between a strong ridge to the west and a broad low pressure to the east. A weak upper trough will slide mostly down the front range Monday night and bring isold high mountain showers after midnight to the Park and Gore range.
A broad long wave trough is holding position over the eastern states with a couple weak short waves riding through the fast flow aloft.
900 PM EST Sun Dec 31 2017 Stationary frontal boundary across north Florida will begin to slip south toward the nrn forecast area late tonight as a weak low pressure area in the eastern Gulf of Mexico slides east-southeast. Expect IFR CIGs areawide into Monday afternoon as the shallow cold frontal boundary moves down the peninsula. Stronger winds associated with the cold front forecast to move down the waters on Monday.
516 PM CST Sun Dec 31 2017 WV imagery this afternoon was showing the extreme western CONUS under the influence of an anomalous upper ridge situated over west coast. Meanwhile, a deep longwave trof was in control over the eastern half of the country. an intense large area of high pressure was in control across the majority of the CONUS.
High pressure is settling into the region with winds expected to decrease overnight.
Early afternoon surface analysis shows the arctic front has pushed south to the Gulf Coast with high pressure building in from the Plains. The center of the high was positioned across the northern Plains today where temperatures were struggling to reach -20F.
Issued a short fuse Winter Wx Advsy earlier considering the surface temps are below freezing there. That being said, still could have some localized issues, esp on bridges across that area & more specifically Burleson Co where the stronger radar returns appear.
The warmer air west of the divide will keep wind potential in check.
Second, a few hi- resolution models were pointing toward the Fort Peck Lake producing freezing fog and sending this off slowly in the direction of Malta and Whitewater. For the remainder of the week, upper ridge along the west coast will shift eastward over the Great Basin. This will spread warmer air across the Divide, starting with a Chinook in Alberta on Monday.
Even though additional snow accumulations will be light with only one-half to one inch across the higher elevations, plan on keeping winter weather advisory until 1 am. After talking with local EMs and media, light snow accumulations this evening has produced numerous slick spots on area roadways, especially across the higher ridges and Mountains. Chattanooga Airport, TN 18 30 12 32 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 15 27 7 29 / 0 0 0 0 Oak Ridge, TN 15 29 7 29 / 0 0 0 0 Tri Cities Airport, TN 12 23 4 27 / 0 0 0 0 NC.