Aikyam-Lab/Synoptic-Bench huggingface dataset:
920 AM EDT Sat Aug 20 2016 A cold front will bring better rain chances tonight into Sunday. Rain chances increase tonight as a pre-frontal mid-level trough moves up the Ohio Valley. Models indicate that convection along this trough axis will be decreasing as it enters our western counties late this evening. Still, with moisture and lift increasing ahead of the cold front, an gradual increase to likely PoPs was maintained. The cold front will arrive in the pre-dawn hours.
639 AM CDT SAT AUG 20 2016 A cold front was draped across southeast Kansas and extended northeastward up into the Great Lakes Region and southeast into Oklahoma this morning. Also, as a strong area of high pressure continued to drop southward across the Northern Rockies, the pressure gradient has increased across Western and portions of Central Kansas resulting in gusty northerly winds. We will begin to dry out this weekend and a cooler, dry post frontal air mass traverses the region bringing below normal temperatures and a break from the heat. Accompanying these cooler temperatures will be breezy northerly winds as the pressure gradient holds strong through the early to mid-afternoon.
1237 PM EDT SAT AUG 20 2016 A pressure ridge will extend from the Atlantic westward into the Gulf of Mexico through Sunday. North of the ridge, a pressure trough and associated moisture will be in the forecast area. A cold front will move into the area Sunday night. Temperatures will remain above normal ahead of the cold front through Sunday.
Water vapor imagery this morning shows a large trough centered across the Hudson Bay to our north, with an axis extending south into the Plains States.
1214 PM EDT SAT AUG 20 2016 A strong cold front will move through the forecast area early Sunday morning. High pressure will build over the region for the start of the week. Through 6 pm best chances for shower/thunderstorms will be across the I-75 corridor as a prefrontal trough arrives. Warm air advection will occur today in advance of an approaching cold front. Dew points in the lower 70s will creep northward into the county warning area.
622 AM CDT SAT AUG 20 2016 Canadian high pressure located over Wyoming builds through Nebraska today and settles over Kansas tonight. The models show the clouds moving east through ND but could move overhead tonight as high pressure moves into KS.
Upper trough axis is moving eastward across the eastern Dakotas early this morning. Showers continue to move across the CWA with the highest concentration over the eastern CWA. The upper trough will move into MN later this afternoon, with weak instability residing across eastern SD and west central MN. This is a cool high pressure system, and if ideal radiational conditions set up, we'll be looking at some rather chilly morning lows come Sunday morning.
The highest available moisture has shifted further west of the area leading to a slow downtrend in total available moisture for storms to develop in our area. At the sfc, high pres continues to ridge west acrs the nrn Gulf coast, resulting in lt s-sw winds. Aloft, an upr ridge extends acrs nrn Mexico into the nrn Gulf, with swly winds on the nrn flank of this ridge streaming Pacific moisture over the region per the latest UA analysis and WV imagery.
A cold front near the I-20 corridor at sunrise will drift south and become more diffuse through the day. Meanwhile to the north, more storms are forming along and north of a cold front approaching the northern Big Country. (Sunday through Saturday) The wet and cool pattern continues into Sunday as the remnant cold front lingers across the area.
activity developing along and ahead of a cold front approaching from the northwest. with additional SHRA seen NW of the state along and ahead of an approaching cold front. This cold front will drop SE into the state by late this afternoon and into the evening hrs. the cold front will be along or just south of the I- 40 corridor. and on Sun as NRLY flow will be seen behind the cold front.
Only chance for storms today looks to the over the higher terrain south of Interstate 70, mainly over Park county.
A midlevel trough will be moving through the area this evening.
Upper level trough digging into the plains this morning with a lead wave now lifting out over the upper Mississippi valley and the main energy with the trough over south central South Dakota. Cold front and associated storms are tracking most closely to the timing of recent runs of the ECMWF, thus will use this as a general basis for this morning's forecast.
A cold front is currently moving through southwest Missouri and northwest Arkansas. More thunderstorms expected to move through the region this afternoon as the cold front approaches. Overall it appears that rather wet and stormy conditions will prevail through the day and into tonight ahead of a cold front. The cold front should sweep across the region late tonight into Sunday.
High pressure will then build in behind the departing system on Sunday as rain chances fall steadily through the night and into Sunday.
/Today/ Primary forecast challenges are precipitation chances today along with much cooler temperatures. Forecaster Confidence = Medium/High Potent upper level trough will continue to pivot through the upper Midwest today. The other story will be the much cooler temperatures today.
which has acted as a blanket and kept early morning temps above freezing over these areas. temps have fallen off below freezing although some modification in temps is expected by daybreak over portions of Deep E TX where additional cu is rapidly building E. although sct -SHRA should become more focused Sunday evening along/just ahead of a weak cold front that will slowly dig into extreme SE OK/NE TX/Wrn AR.
528 AM EST Sat Dec 10 2016 High pressure will build east across the region today offering continued cold temperatures.
551 AM CST Sat Dec 10 2016 Surface data shows ridge of high pressure over western IL which will be east today as a system strengthens in the lee of the Rockies. By Sunday 12z, the main low pressure center will be into the western plains.
1004 AM EST Sat Dec 10 2016 High pressure will prevail until the development and passage of a coastal trough into Sunday night.
A stable, unusually dry, and cold atmosphere is over the region as high pressure moves towards the Appalachians.
627 AM EST Sat Dec 10 2016 Regional observations this morning are showing most areas either at or already well below freezing and diminishing winds under clear skies should improve radiational cooling enough to support temps falling a few more degrees before sunrise this morning. Meanwhile, high pressure well to our east will still be nosed in across portions of north/central Georgia through the overnight hours.
Weak isentropic lift, aided by the troughing, should be enough to see isolated to possibly scattered showers/rain across the eastern zones by this afternoon. Temperatures will be a several degrees warmer than the days past with the return of the onshore flow and as the core of the colder modified arctic airmass we had in place moves away.
Deepening lee trof over eastern New Mexico today will support southwest surface winds gusting into the 25 to 30 kt range this afternoon. /Issued 359 AM CST Sat Dec 10 2016/ Downsloping flow, southern flow at the surface, and sunny skies will help the Panhandles to see temperatures increase to around 15 degrees warmer than yesterday. As high pressure moves in for the beginning of the work week, temps will hover around climatological norms. The upper level pattern looks to begin changing by the end of the work week as a low pressure system comes on shore and digs into the western Conus.
515 AM CST Sat Dec 10 2016 High pressure has settled into the southern Appalachians this morning as temps dropped into the upper 20s to lower 30s across the northwest gulf. Has the high exits off to the east late today another system will drop down the eastern slopes of the Rockies late tonight. Temperatures will warm rapidly tomorrow with highs around 70 with some locations into the lower 70s down towards the coast.
LES will push offshore this evening into tonight ahead of a low pressure system.
921 AM EST Sat Dec 10 2016 High pressure will build east across the region today offering continued cold temperatures.
In the middle and upper levels, (700-200 mb), Latest available IR imagery overlaid with model streamline analysis as of 900 am depicts an expansive broad low amplitude long wave polar trough presently encompassing the entire CONUS. Well to the south of that, the main axis of a deep and warm anticyclone is positioned across the North Central Caribbean Sea. At the surface and in the lower to middle levels, (Surface to 700 mb), latest available IR imagery as of 900 am, overlaid with marine and land surface observations and analysis, detail the center of an arctic 1038 mb surface anticyclone is positioned just east of the Mid-Mississippi Valley.
Dry high pressure over the region will maintain VFR throughout today while winds remain light east to northeast. With high pressure advancing east of the region, low level flow will become southerly overnight with scattered to broken stratocu overspreading the forecast area. /issued 515 AM CST Sat Dec 10 2016/ High pressure has settled into the southern Appalachians this morning as temps dropped into the upper 20s to lower 30s across the northwest gulf. Has the high exits off to the east late today another system will drop down the eastern slopes of the Rockies late tonight. Temperatures will warm rapidly tomorrow with highs around 70 with some locations into the lower 70s down towards the coast.
Overnight lows once again fell into the 40s and low 50s across the lower deserts, with a few upper 30s at the very coldest locations. Slightly warmer temperatures are expected today, with lower deserts seeing highs in the low to mid 70s, as slightly stronger winds aloft help to mix warmer air down to the sfc.
Moderate to heavy precipitation continues ahead of the cold front that extends from Eureka California to Paisley Oregon at this time.
641 AM EST Sat Dec 10 2016 High pressure will build east across the region today offering continued cold temperatures.
Temperatures will remain below freezing overnight tonight which will keep roadways slick, especially if they have become snow-packed and icy over this past week. Temperatures will trend warmer for Sunday, but most locations will remain cold enough for snow throughout the day and night.
The high continues to ridge into SE TX but will begin to lose it's influence as it moves east. Today will start on the cold side once again but weak warm air advection should allow for slightly warmer temperatures this afternoon.
After a cold start this mrng with lows arnd 20, temps will slowly warm into the low to mid 40s by the aftn under mostly sunny skies. This should keep mrng lows on Sunday a little warmer than this mrng, mainly in the mid to upper 20s.
849 AM EST Sat Dec 10 2016 High pressure will build North, then slowly to the Northeast this afternoon. As the high builds, a coastal trough is expected to develop. The increasing onshore flow, and convergence associated with developing trough will help push stratus onshore during the afternoon hours.
High pressure centered near the TN valley will shift slowly eastward this afternoon. Tight pressure gradient around the high with 7 MB sfc gradient from JAX to MIA will support breezy onshore winds along the east coast as the coastal trough breaks down into the afternoon. Tight pressure gradient across the waters in response to high pressure well north of the area will keep winds/seas elevated.
Chattanooga Airport, TN 45 28 51 44 / 0 0 10 60 Knoxville McGhee Tyson Airport, TN 39 25 49 42 / 0 0 10 60 Oak Ridge, TN 41 25 49 42 / 0 0 10 60 Tri Cities Airport, TN 38 23 47 39 / 0 0 10 60.
715 AM EST Sat Dec 10 2016 High pressure will prevail until the development and passage of a coastal trough into Sunday night.
Plume of deep moisture responsible for the steady precipitation yesterday and overnight will shift south through the day as a weak upper trough and accompanying surface front track through the region. This will bring an end to the precipitation across much of southeast Oregon and the lower Snake Plain by noon. Cold air will remain trapped in the lower Treasure Valley from Boise to Ontario/Vale and the Weiser Valley through this morning. With temperatures of 30-32 degrees these areas will continue to see freezing rain or in the Weiser Valley a mix of snow and freezing rain. For tonight and Sunday slightly cooler northwest flow will keep focus of snow showers in the east-central Oregon and west-central Idaho mountains.
Despite the weak ridging aloft, an upper level impulse upstream is spreading shower activity across a good portion of the mid south to our southwest. Upper ridging should keep our eastern half mostly precip free through today.
The water vapor shows a drier back side to this upper low edging our way with a dry slot into S TX.
908 AM EST Sun Mar 5 2017 High pressure overhead will slowly shift to New England through Monday.
618 AM EST Sun Mar 5 2017 High pressure will build in from the west on Monday, moving off to the east by Monday night.
637 AM EST Sun Mar 5 2017 High pressure will be situated east of the region today allowing for southerly flow and warmer temperatures.
As the 500-300 mb ridge axis passes over the area, mid/high clouds will increase from the southwest through the afternoon.
905 AM EST Sun Mar 5 2017 High pressure will build in from the west on Monday, moving off to the east by Monday night.
Surface observations across the region indicate that temperatures have fallen markedly behind today's cold front, and snow levels have fallen to roughly 1000 to 1500 feet in places as a result. Meanwhile, bouts of small hail and/or graupel will be possible at the lower elevations along the immediate coast, with an occasional strike of lightning possible as well.
Went with the higher side of guidance for highs today where sun is a good bet. Kept highs 5 to 10 degrees cooler there.
1023 AM EST Sun Mar 5 2017 High pressure will linger across the region the rest of the weekend, then will slide off the coast on Monday.
Temps range from the upper 30s over the TN River Valley and parts of NW TN where only high clouds have moved in to the lower 50s over the Delta from Memphis and points SW. Latest radar trends indicate a fairly extensive precip shield across the Lower Mississippi Valley attm so have raised rain chances significantly this morning with likely pops for much of NW Mississippi, Eastern Arkansas and Memphis. Rain and clouds will hold temps down today with highs in the lower 60s. As a cold front begin to move across the plains and high pressure remains along the east coast southerly flow will increase across the Mid-South.
342 AM PST Sun Mar 5 2017 Cooler, unsettled weather this weekend into Monday with low snow levels and significant snowfall.
736 AM EST Sun Mar 5 2017 High pressure will maintain dry weather through tonight. Approaching low pressure should result in increasing rain chances early in the work week.
545 AM EST Sun Mar 5 2017 High pressure will maintain dry weather through tonight. Approaching low pressure should result in increasing rain chances early in the work week. Dry weather and a few mid and high clouds are expected today under high pressure and warm advection. Ridging should maintain dry weather tonight.
926 AM CST Sun Mar 5 2017 Upper level trough can be seen via water vapor sallite moving east of the area with drier subsident mid/upper levels currently moving across the area.
415 AM PST Sun Mar 5 2017 Wet, cooler and gusty today as a storm system moves through the region.
440 AM MST Sun Mar 5 2017 Temperatures are currently running 10 to 15 degrees warmer than what was observed 24 hours ago at most locations around the forecast area. The reason for this is warm air advection ahead of an approaching cold front. These winds will be gusty with gusts to 55 mph in the lower elevations and gusts up to 75 mph over the mountains. The cold front itself is expected to pass over the forecast area tonight and will support showers this afternoon with isolated thunderstorms possible north of I-70.
336 AM PST Sun Mar 5 2017 A cold front will bring some rain and mountains snow to the area today along with much cooler temperatures and breezy conditions.
Aviation and Fire Weather Discussions A low pressure system passing to the north will allow cooler air to filter into the region today and Monday, but dry conditions will persist through the coming week.
646 AM EST Sun Mar 5 2017 High pressure overhead will slowly shift to New England through Monday.
305 AM MST Sun Mar 5 2017 A low pressure system passing to the north will allow cooler air to filter into the region today and Monday, but dry conditions will persist through the coming week.
Monday will be warmer with highs in the 50s but there is a chance of rain. A cold front will approach Monday night with rain and a chance for thunderstorms expected.
It will not be as cold tonight because of air mass modification and developing onshore flow as the ridge shifts eastward.
06Z surface data has a warm front running from extreme southwest Minnesota to near KEVV. Dew points were in the teens and 20s across the Great Lakes and upper Midwest with 30s from the lower Ohio Valley into the northern Plains. Thus will continue that trend up here today but I would not be surprised if temperatures ended up being slightly cooler.
1034 AM EST Sun Mar 5 2017 High pressure will maintain dry weather through tonight. Approaching low pressure should result in increasing rain chances early in the work week.
Despite mostly cloudy conditions over much of the region today, the low level flow will allow high temperatures to rise to somewhat above normal values once again. Will see a fair amount of sunshine on Monday as drier air moves into the mid/upper levels across Deep South TX amidst weak high pressure aloft. Highs at the coast will be in the lower 80s with mid 80s to lower 90s inland.
302 AM PST Sun Mar 5 2017 A low pressure system moving inland through the western states will bring cooling today with periods of mostly light precipitation along and west of the mountains and in the upper deserts for this morning into this evening.
1002 AM EST Sun Mar 5 2017 High pressure will remain in control through tonight, then move offshore Monday.
Aloft, height fields will compact in advance of an open trough tracking to our north on Monday in SW flow. Subsequent lee troughing will sharpen today over eastern NM while shallow moisture mixes off the Caprock and sets up a diffuse dryline. Consequently, max temps were edged up particularly in our NW zones nearest the low level thermal ridge. Wind speeds will decrease after sunset and then a cold front will push across the area after midnight and be south of the forecast area by sunrise.
632 AM EST Sun Mar 5 2017 Weak upper ridge to round out weekend.
A strong cold front will move through northern and central Nevada today bringing snow and strong gusty winds.
Any rainfall accumulations will be light and isolated as the low levels remain quite dry. Shower activity diminishes into Sunday night, with low temps expected to dip into the low to mid 50's inland to around 60 near the coast.
Areas of fog and light to moderate snow showers will continue over the northwest half of North Central Montana this morning after the passage of a Canadian cold front. The front has moved through Great Falls and Havre, cooling them below freezing.
There is still some spread in the details of the guidance, with the 00 UTC GFS continuing to be the deepest outlier with the strength of the low. The GFS was disregarded for winds due to its outlier solution for the strength of the low.
1004 AM EST Sun Mar 5 2017 High pressure remains in control of the weather today before moving offshore Monday.
As high pressure builds south again into the Carolinas today expect East winds to increase to 15-25G30-35 mph along the coast with lesser winds inland.
Southerly flow will increase today through Monday as high pressure moves off the east coast and low pressure advances into the Northern Plains. A disturbance over the lower Ms Valley will lift northward, bringing increasing clouds today, and perhaps a few late day showers in our western counties. Clouds will continue to thicken tonight, and scattered light showers will be possible across the area as the warm advection pattern continues with additional weak impulses coming up from the lower Ms Valley.
Freezing level was at 12,000 feet, with the -20C level at 22,500 feet.
606 AM CST Sun Mar 5 2017 A messy TAF package this morning as a vicinity coastal low pressure trough introduces an unsettled warm air advection pattern of mixed morning IFR/MVFR decks/vsbys within periods of west-to-east passing light precipitation. a more gentle warm air-over-relatively-cooler air (upglide) flow pattern. /ISSUED 353 AM CST Sun Mar 5 2017/ Areas of mainly rain and/or showers will continue to be possible across Southeast Texas today as the mid/upper level trough moves east and northeast across the area. Anticipate decreasing rain coverage for much of the area this afternoon as the main trough axis edges off to our east.
A low pressure system moving into the Pacific Northwest will bring strong winds to much of the area by this afternoon and early evening. A dry northwest flow will usher in much cooler temperatures for Monday but temperatures are expected to warm to well above normal levels by the end of the week.
The low cloud cover will remain our our area through 9 AM, with some patchy light fog/drizzle is possible. Temperatures will be warmer today, and highs this afternoon are expected to range from the upper 60s/near 70 in our far eastern counties, to the mid 70s across the central and western Concho Valley. As the leading portion of an upper level trough advances east into the northern and central Rockies tonight, a low-level jet will develop across our area. (Monday through Sunday) Warmer on Monday with the clouds finally clearing. Moisture returns Monday evening, ahead of an approaching cold front.
951 AM EST Sun Mar 5 2017 Weak upper ridge to round out weekend.
Severe weather appears likely given the highly sheared environment. Will lean more toward the slower/warmer ECMWF.
As the day passes, the upper level trough will make its way onshore and produce significant instability over Southern Oregon and Northern California. Some of the higher terrain west of the Cascades has been upgraded to a Winter Storm Warning for impacts of heavy snowfall to area roads tonight into Monday as well.
In addition, some light precipitation is possible near the White Mountains today, and along a cold front from Sunday night into Monday.
848 AM EST Sun Mar 5 2017 High pressure is in place to the NE of the area causing a moderate E/NE wind flow over the area becoming gusty in the late morning and afternoon.
617 AM EST Sun Mar 5 2017 High pressure will remain in control through tonight, then move offshore Monday.
403 AM EST Sun Feb 26 2017 High pressure will move in from the west today, then move offshore later tonight and Monday.
358 AM EST Sun Feb 26 2017 High pressure will move in from the west today, then move offshore later tonight and Monday.
1208 AM EST Sun Feb 26 2017 High pressure will build in today.
Our southwest zones may see light southerly winds return overnight as the high shifts eastward, but still expect temperatures to fall into the mid to upper 30s over these areas.
Cool and dry high pressure will advance over and east of the forecast area overnight. Cool and dry high pressure will advance over and east of the forecast area overnight. High pressure that brought this weather is exiting off to the east attm and looks to move off the Mid-Atlantic states by tomorrow evening.
/ISSUED 401 PM CST Sat Feb 25 2017/ Eastern OK/northeastern TX centered surface ridging providing the subsidence needed to keep skies clear. High pressure will advance eastward into the southeastern U. as more warm humid air overruns a modifying cooler lower level dome of air. Sunday's afternoon temperatures will likely top out in the lower to middle 70s.