Aikyam-Lab/Synoptic-Bench huggingface dataset:
727 AM EDT Sun Mar 11 2018 Low pressure over Newfoundland this morning will continue to shift east into the Canadian maritimes today with mountain snow showers continuing through mid-day before tapering off.
615 AM CDT Sun Mar 11 2018 A mid/upper trough digging across Missouri today will bring gusty northwest winds and low level cold air advection to the area today. As high pressure settles south across central Kansas tonight, low temperatures will fall into the teens and 20s in some locations. High pressure at the surface will translate slowly south across the Central and Northern Plains on Tue bringing lighter wind speeds and seasonably cool temperatures with highs in the low 50s for most locations. A mid/upper ridge is progged to emerge from the Southern Rockies toward the middle of the week with rising heights/increasing thickness across the Central Plains.
Areas of freezing fog will cause reduced visibility along the HiLine this morning. Expect continued snow melt with areas of ponding water, refreezing overnight. Temperatures trend gradually warmer through mid-week.
Changes to the forecast this morning as low topped thunderstorms form ahead of descending upper low. Later as the low swings towards western Kentucky wrap around moisture in the dendritic zone coupled with CAA on the surface will lead to rain a rain and snow mix early this evening. /issued 349 AM CDT Sun Mar 11 2018/ Early morning GOES East water vapor imagery showed an upper low centered between Omaha and Kansas City. This low will track southeast across MO today, reaching western KY by midevening and middle TN by early overnight. Moisture remains limited in the -12C to -18C dendritic layer and surface temps during this period should prevail at or above freezing.
Today, NE MT will have clear skies due to the ridge in place over the high plains. Templer Previous Discussion: Clearing skies, a high pressure ridge approaching and calm winds have allowed some areas of northeast Montana to develop some freezing fog through these early morning hours. Satellite imagery and observation data show that the most dense freezing fog seems to be here in Glasgow along the Milk River and low lying areas upstream of Glasgow in western and northwestern Valley County. For now, have chosen to issue a Dense Fog Advisory for Valley County until Noon today, with additional impacts of the fog easily freezing onto exposed surfaces, making them slippery through the remainder of this morning.
739 AM EDT Sun Mar 11 2018 Dry weather continues today under high pressure.
1020 AM EDT Sun Mar 11 2018 High pressure will remain centered over the Great Lakes today providing dry weather. But it will remain dry in the low levels with easterly flow persisting. Expect lows from the lower 20s north to the upper 20s south. Surface cold front to drop south reinforcing cold air over the area. Upper trough positioned across Eastern NOAM will dictate weather for this period.
Areas of freezing fog will cause reduced visibility along the HiLine this morning and again Monday morning. Expect continued snow melt with areas of ponding water, refreezing overnight. Temperatures trend gradually warmer through mid-week. Airmass RGB imagery and surface obs suggest mostly mid/high level moisture associated with this low. As the low passes over SW MT later today/tonight, there may continue to be just enough mid level moisture for a few mountain snow showers and I added a low-end chance above 6000 feet, mainly for this evening. Of note, areas of dense, freezing fog are once again likely tonight along the Hi-line and may expand further south compared to this morning. LIFR conditions in freezing fog are occurring along the Hi-line this morning between KCTB and KHVR. Freezing fog could redevelop again early Monday morning at KCTB/KHVR.
1203 PM EDT Sun Mar 11 2018 Dry weather continues today under high pressure.
The data, namely the RAP/HRRR, is strongly suggestive of MVFR cigs dropping in from the north in the wake of the cold front across NW AR thru the day and possibly into the evening, so this forecast leaned more pessimistic this go around.
Temps in the low 40s expected today with onshore flow keeping temps cooler near the lake. As deep upper level trough digs south across the Great Lakes region late tonight, strong vort lobe and associated snow showers could clip far northeast IL and northwest IN. Rodriguez 152 AM CST With upper level trough in place at the start of the work week, cyclonic flow and active pattern will help support scattered flurries and possibly scattered snow showers on Monday.
Added some slight chance PoP's for tonight over the Cooke City vicinity for a weak short wave tracking under the upper ridge. High pressure ridging will build over the northern Rockies today through Monday. A weak disturbance will undercut the ridge and move across mainly the Beartooth/Absaroka Mountains tonight.
648 AM CDT Sun Mar 11 2018 Widespread mist and pockets of freezing drizzle are in place this morning southwest of the MS river. Lows tonight will dip into the teens across much of MN and into the low 20s in WI.
1102 AM CDT Sun Mar 11 2018 Cooler today with gusty north winds. Afternoon highs are expected to be 15-20 degrees cooler than yesterday. Gusty north winds behind a cold front will likely continue through much of the day before diminishing around sunset. Cold front moving across the area this morning will bring in cooler temperatures as well as gusty north winds. Cooler weather will continue into the early part of the upcoming week as a couple of Canadian airmasses will slide south through the Plains.
1023 AM EDT Fri Oct 13 2017 High pressure will remain in place over the Ohio Valley through the rest of the week, before moving east of the region going into the weekend.
The western edge of the low clouds presently lying on a GLY-to-DIA-to-PUB line. The cold front that moved across the state overnight has cooled temperatures quite a bit, and the cooling trend will continue with today's high temperatures 10-15 degrees cooler across the Plains and 5-7 degrees cooler in mountains. Models show a southwesterly jet maximum over the forecast area on Saturday as an upper trough will push eastward across Colorado through the day into the evening. The upper axis of the trough is over the eastern border by 06Z Saturday night.
Surface ridging will provide generally quiet weather today and tonight, with not really any impacts expected. Day time temperature will be cooler than yesterday, but still went a bit warmer than guidance considering recent model biases and solar expected.
An embedded short wave tracking across the southern periphery of the upper level high pressure will provide some weak upper support and enhance shra/tsra activity Sat morning. Have extended the Coastal Flood Advisory through 12Z Saturday to cover the high tides overnight and into early Saturday morning.
A cold front will move across the forecast area this morning. Have the highest confidence of the coolest readings across the northeastern zones where highs may struggle to get above the lower 60s. The 12Z NAM is cooler and the hourly HRRR's are trending cooler but not cool enough as forecast. The highest probabilities are along and east of Highway 283.
/issued 328 AM CDT Fri Oct 13 2017/ A couple more hot days before a strong cold front and a chance of rain arrive this weekend. Upper ridging aloft will continue to keep things very warm across the area today and Saturday.
An onshore flow will continue over the district today with cooler than normal temperatures. The combination of an offshore flow and a building ridge of high pressure will bring warmer weather into the central California interior this weekend. A dry northwesterly flow aloft resides over the central California interior this morning, and in addition to bringing a cooler air mass into the district, high altitude winds are also carrying smoke over our cwa from the ongoing wildfires over Northern California. An upper level ridge currently centered over the Eastern Pacific will build into the Golden State this weekend and bring us a warming trend.
That said, the dome of high pressure will likely help keep activity rather scattered. Decided to bump highs a bit more today and tomorrow as the ridge continues to dominate.
639 AM CDT Fri Oct 13 2017 At 3 AM, a cold front extended from the Minnesota Arrowhead to Lincoln NE. Meanwhile, further to the south, a warm front was located over southern Iowa. Meanwhile, further south, the warm front will move north across Iowa and spread showers into northeast Iowa and southwest Wisconsin.
Otherwise expecting dry conditions today and tomorrow as the upper high slides eastward from the lower MS River Valley towards the east coast.
629 AM CDT Fri Oct 13 2017 Surface ridging will provide generally quiet weather today and tonight, with not really any impacts expected. Day time temperature will be cooler than yesterday, but still went a bit warmer than guidance considering recent model biases and solar expected.
Convergent flow between surface ridging over the Mid- Atlantic and weak low pressure moving into the Gulf, will combine with plentiful moisture and generate a few showers that move into southeast and south-central Georgia from the Atlantic late this afternoon. So, despite highs in the upper 80s to lower 90s today, it won't feel so oppressive due to the lower dewpoints and humidity. Deep layer ridging will remain draped across the southeast US with a weakening front hanging around today.
Low level moisture will continue to increase tonight, with dewpoints climbing into the mid 60s, keeping overnight temperatures a bit warmer than the last few days.
1144 AM EDT Fri Oct 13 2017 High pressure over the northeastern states will slink off into the northern Atlantic tonight and Saturday.
Strong high pressure (1036 millibars) centered over the Canadian Maritime Region was wedging southward down the U. a sprawling ridge was centered over the lower Mississippi Valley and eastern Texas, while a Tropical Upper Tropospheric Trough (TUTT) was nearly stationary over the Bahamas. This low-topped activity has moved to the west of I-95 and is migrating through the St. Temperatures as of 15Z were in the low to mid 80s, with dewpoints generally around 70 and northeasterly winds increasing to 15-20 mph in coastal locations and around 10 mph inland. The deeper onshore wind regime will keep inland temperatures warmer, with upper 60s to near 70 forecast, while coastal lows remain in the mid to upper 70s. Strong high pressure centered over the Canadian Maritime Region will continue to build southward down the U.
614 AM CDT Fri Oct 13 2017 Much warmer temperatures along with plenty of sunshine is in store for today. This feature will track steadily eastward toward the Great Lakes and push the associated cold front southward across the Ozarks Saturday night.
Models continue to remain in good agreement concerning the passage of a trough of low pressure across the Pacific Northwest and into the Great Plains through the rest of the week.
938 AM EDT Fri Oct 13 2017 High pressure will retreat into the maritimes today. A cold front will approach from the west tonight before dropping south into northern New England on Saturday and stalling.
A large mid-upper anticyclone will remain centered over the deep south in the vicinity of the Mississippi delta region while an inverted trough becomes strung out to our south and across the northern Bahamas. Weak inverted trough is shown moving westward across the southern peninsula this afternoon, while high pressure remains anchored along the eastern seaboard to our north. A tighter pressure gradient with northeast-east winds near 20 knots should continue across north/central waters, while the exiting trough in the south allows for slightly weaker easterly winds.
907 AM MDT Fri Oct 13 2017 Visible GOES-16 imagery indicates an extensive stratus shield in place behind cold front that is slowly advancing to the south across southern Kansas. However, this feature will shift rapidly E/SE during the day as high pressure strengthens over WY/NE and extends S/SSE into KS. Meager chances for light rain along/east of Hwy 283 will end shortly after ~12Z as warm advection ceases and the aforementioned baroclinic zone progresses into central/southern KS as a cold front. Sun-Sun Night: Expect seasonably cool/dry conditions associated with high pressure over the region.
1122 AM EDT Fri Oct 13 2017 A weak surface boundary just south of the CSRA will remain in place and weaken through the day as ridging overtakes the region. High pressure ridge will be over the region through the weekend keeping dry conditions in place.
816 AM EDT Fri Oct 13 2017 Building high pressure should maintain mainly dry weather through Saturday.
Upper level trough over the Pacific Northwest today will continue showers across the area through this evening. First part of the trough is currently moving across our northern zones producing light rain and snow showers /above 4500 feet/. Snow levels will remain around 4000-5000 ft for rain in the valleys and snow in the mountains as the coldest air will follow the trough passage tonight. Temperatures will drop below freezing overnight tonight with fog developing in sheltered valleys.
Morning update discussion cover through this evening: 12UTC JAN sounding reveals potential for very deep mixing through today as the subtropical ridge further strengthens over the region. /BB/ Prior discussion below: Not much change is expected in our prevailing weather today and tonight as upper ridging has a firm grip over our region(as well as the rest of the southeast United States). Temperatures will be a few degrees warmer than yesterday and this will be a trend that should continue through the weekend. Moisture will slowly return to the region as dewpoints rise into the lower 60s by this evening, and even some upper 60s in the Pine Belt. Overnight lows will be in the lower to mid 60s across the region tonight.
The low clouds are shrinking quickly about the Wabash River, and should clear the entire area by daybreak.
Thunderstorms with heavy rain can be expected for Saturday and Saturday night as low pressure tracks across Lower Michigan.
625 AM CDT Fri Oct 13 2017 A cold front is slowly working through the forecast area this morning, currently stretching from Concordia to north of Hays.
1243 PM EDT Fri Oct 13 2017 High pressure will build across the region today through Saturday. A cold front will push south into the Great Lakes Saturday but stall north of Ohio and Lake Erie.
1054 AM CDT Fri Oct 13 2017 The low clouds are shrinking quickly about the Wabash River, and should clear the entire area by daybreak.
A TUTT is stretched out across South Florida from northeast of the Bahamas, to the eastern edge of the Yucatan Peninsula, with the low to mid level low at the center.
Strong high pressure will hold across the region yielding clear to mostly clear skies. /issued 415 AM CDT Fri Oct 13 2017/ Deep layer ridging to continue prevailing across the region today, yielding another afternoon of well above normal (and in some cases near record) high temperatures. Global models depict the ridge beginning to erode tomorrow as an upper trof translates through the Rockies and into the Plains, though another afternoon of very warm temperatures is expected SAT afternoon.
1055 AM CDT Fri Oct 13 2017 Weak sfc ridging remains anchored from the OH Valley SW into extreme Ern TX this morning, and will remain so through tonight before easing E of the area Saturday. Meanwhile, the center of the H850-700 ridge in place across the region will gradually begin to shift E by afternoon, with weak moisture advection expected to shift NE from E TX into SE OK/adjacent sections of SW AR. This low level moisture gradient is evident in the 15Z sfc isodrosotherm analysis, with the tight dewpoint gradient noted from the Red River of N TX into extreme NE TX and along the TX/LA line.
1000 AM EDT Fri Oct 13 2017 High pressure will continue to wedge southward along the eastern slopes of the Blue Ridge through tonight before eroding by Saturday afternoon.
517 AM MDT Fri Oct 13 2017 Broad upper trough covers much of the western CONUS, with ridging over the east. At the surface, high pressure rests over the northern plains. The upper trough will dig into the Rockies tonight, and a cold front will begin crossing the region. Chances for rain/snow showers will increase early Saturday morning and continue into the afternoon, but dry weather is expected by the evening as the trough quickly moves through the northern plains.
Broad upper level ridging extends over the southeast U. Farther to the south, an inverted trough extends north from Cuba over the Bahamas. The upper high will remain quasi- stationary as the trough moves westward over southern Florida. This ridging will keep an east-northeast wind flow over the region through the period. Minimal rain chances are expected from Tampa Bay northward over the Nature Coast on Friday with the highest chances over the inland counties and southwest Florida with a 30-50 percent POPs expected.
1228 PM EST Fri Feb 16 2018 A cold front that produced widespread rain has moved south, allowing colder temperatures and drier conditions to visit with high pressure by tonight. On Saturday, low pressure traveling across the Southern Appalachians will bring precipitation mainly to southeastern locations.
331 PM EST Fri Feb 16 2018 A weak cold front will move over the area tonight, then become stationary across the region this weekend.
1233 PM EST Fri Feb 16 2018 A cold front is moving north to south across the area.
254 PM EST Fri Feb 16 2018 High pressure will build in from the west tonight and crest over the region on Saturday.
30 An unsettled and somewhat spring-like weather pattern is shaping up for the region over the next 7 days with multiple opportunities for rain and no subfreezing temperatures expected. The highest rain chances will be across the northern half of the region in the morning where the best large scale lift will be. All precipitation will shift to the east and southeast Saturday afternoon with the passing of the trough axis.
251 PM EST Fri Feb 16 2018 The deep mean-layer ridge remains parked over the Florida Peninsula.
1211 PM EST Fri Feb 16 2018 A cold front will push southeast across Pennsylvania today. High pressure will build into the region tonight and early Saturday, then developing low pressure over the southeast states will track up the Mid Atlantic coast late Saturday. Colder air is starting to move in behind the cold front as of mid day. High pressure builds into the region tonight, bringing clearing skies, diminishing wind and much colder temps. Superblend/NBM both indicating min temps from the mid teens over the northwest mountains, to the mid 20s across the Lower Susq Valley.
259 PM CST Fri Feb 16 2018 (Tonight and Saturday) A cold front that pushed across West Central Texas this morning has left much cooler temperatures compared to yesterday and breezy northeasterly winds in its wake. High res model guidance continues to indicate the highest rain chances across the Big Country with lesser chances further south. Otherwise, rain chances will taper off by tomorrow afternoon as the upper level trough moves off to the east.
328 PM CST Fri Feb 16 2018 There is a bit more cloud cover inland today thanks to the decaying cold front in the vicinity.
237 PM CST Fri Feb 16 2018 Back edge of the low clouds have made it just east of the I-55 corridor early this afternoon, though there are still plenty of high clouds streaming northeast south of I-72.
315 PM EST Fri Feb 16 2018 High pressure builds in behind the front through tonight. Next low pressure system late Saturday/Saturday night.
500 PM EST Fri Feb 16 2018 A cold front will settle south of the region tonight allowing high pressure to build into the region through Saturday.
Surface analysis this morning places a cold front near Monroe County Mississippi. Regional WSR-88D radar trends show rain showers occurring just behind the cold front across the Mid-South. A cold front is racing south across Missouri this morning and is moving through KCGI as of 3 am. The cold front will race through this morning reaching Memphis by 8 am and Tupelo by 11 am then exiting the Mid-South by early afternoon.
A weak cold front has just about reached CLL where winds have turned out of the NW and should continue to veer out of the N, behind the boundary. Lingering moisture in the low levels will allow ceilings and visibilities to lower to IFR/LIFR from HOU to SGR and northward, beginning this evening and through the overnight period.
/issued 445 AM CST Fri Feb 16 2018/ Latest sfc analysis shows the cold front moving thru the South Plains, w/fropa expected at KMAF ~ 11Z. Further out, WV imagery shows the upper trough pushing the cold front extending from the Great Lakes region into the SW CONUS. Accompanying this trough is a strong 180+kt jet maximized around 250mb, which matches up nicely w/GOES HD winds. Meanwhile, an upper trough will dig south out of the PacNW, keeping SW flow aloft over the region and keeping temps up the first part of the week. Unfortunately, a cold front will push into the area Tue, taking temps well-blo normal by Wed afternoon.
347 PM CST Fri Feb 16 2018 A cold front will move from west to east through the Northland tonight and early Saturday. Very light snow is possible across the Northland overnight into Saturday in advance of the cold front because of some large-scale forcing from the upper trough.
350 PM CST Fri Feb 16 2018 A cold front movg south across the area has resulted in falling daytime temps. However, elevated trough bringing increased chances of rain from the north, currently still just north of the cwa.
352 PM EST Fri Feb 16 2018 A cold front will settle south of the region tonight allowing high pressure to build into the region through Saturday.
The unseasonably strong ridge of high pressure continues to be the main driver of our weather across the southeast and will keep several upper level troughs to our north. With the ridge axis draped across the peninsula providing light southerly flow, our synoptic pattern supports fog development which continues to be our main weather concern despite the limiting factor of warmer Sea fog is likely to redevelop this evening with westerly winds help to advect some of it onshore. Overnight, light winds along with clear skies and dewpoints in the low 60s will help to facilitate radiational fog over land but will quickly burn off by sunrise. High pressure will be ridging across the area at the surface and aloft through the period keeping warm and moist conditions in place.
Some parts are warming into the lower 30s this afternoon. Late tonight (mainly after 09Z), precipitation chances start ramping up across the far western/northwestern forecast zones as the low pressure system, as seen in water vapor loop over Montana and Idaho, trucks on over into the northern plains region.
239 PM CST Fri Feb 16 2018 Cold front has pushed south of the ARKLATX region this afternoon with cool and cloudy conditions across much of the area. Surface winds will begin to veer around to the southeast tonight and with increasing dewpoints tonight no significant threat for freezing rain is expected.
The surface cold front has reached our southern sections but precip behind the front associated with mid-level frontogentic forcing will continue across the northern half until around 00Z.
Cold front will push south of the area this evening. High pressure will briefly build north of the region tonight, then a wave of low pressure will pass to the south Saturday.
335 PM CST Fri Feb 16 2018 Minimal weather concerns are expected through Saturday as high pressure remains over the region. Therefore, overnight low temperatures will still drop into the low to mid 20s across the forecast area.