Aikyam-Lab/Synoptic-Bench huggingface dataset:
Upper level ridge continues over the Great Basin, with some instability and moisture along the Continental Divide that may slop over today as the boundary shifts slightly westward. Wind will continue light until Wed afternoon when an approaching trough starts to break down the ridge, bringing moisture and instability in from the west.
111 AM EDT Mon May 29 2017 A cold front will move across the area this afternoon bringing a slight chance of showers and thunderstorms.
Tonight will also be nice as cooler air filters into the region behind the weak surface front this afternoon.
305 AM CDT Mon May 29 2017 A semi-vertically-stacked area of low pressure over northern Ontario will not be moving anywhere in a hurry through Tuesday. This low will maintain cool, humid, and breezy west-northwest flow across the Northland. The GFS, NAM, RAP, and SREF indicate there will be up to a few hundred J/kg of MUCAPE over the higher terrain of the Arrowhead, and in the far southeast forecast in northwest Wisconsin. Tonight's cloud cover will bolster temperatures to the lower 40s.
/22/ Prior discussion below: Expect showers and thunderstorms to move through the area tonight out ahead of an approaching cold front. Lows tonight will mainly be in the lower 70s. /27/ Prior discussion below: Tonight through Monday (Memorial Day): As the cold front moves towards the area, expect rain and storm chances to linger into Memorial Day on Monday. This will continue to drag the cold front analyzed off to our northwest slowly to the southeast. However, the strongest forcing will remain off to the north, helping the cold front stall up in the ArkLaMiss Delta tomorrow. /DC/ Tomorrow night through the rest of the week: Rather wet and slightly cooler than average conditions generally look to be in the cards for the Lower Mississippi Valley through the period as perturbed southwesterly flow aloft continues.
322 AM EDT Mon May 29 2017 Low pressure centered north of the Great Lakes will push an occluded front eastward across New england through Tuesday. Warmer weather returns for the second half of the work week, but with the chance of showers each day. a 1000 millibar low was over the upper Great Lakes with associated warm front through the mid atlantic region and a trailing cold front through the Mississippi valley. We're left with the persistent onshore flow with widespread stratus and fog along with patchy drizzle for the remainder of the overnight period as the warm front remains hung up to our south and west.
202 AM EDT Mon May 29 2017 Showers and a few thunderstorms through as cold front passes.
539 AM EDT Mon May 29 2017 Weak high pressure will keep Memorial Day mostly dry with seasonable temperatures. Showers associated with an exiting cold front will diminish by mid-morning as high pressure builds back in out of the west. Scattered showers will continue on Tuesday as a cold front crosses the forecast area. A few showers and areas of MVFR/local IFR should continue ahead of a cold front, though a rapid clearing trend and return to VFR is expected as the front crosses. Restrictions are possible Tue/Wed with an upper trough, and again Fri with low pressure.
The warming trend under the ridge will continue with daytime highs climbing a few degrees.
A cool front will move down the plain later tonight and this will bring some clouds to the lower elevations.
1204 AM CDT Mon May 29 2017 The main feature of interest in the short-term is a upper level trough located over the central U. This feature will force a weak cold front into the area tomorrow. Tuesday, the aforementioned cold front south of the area will lift back north as a warm front.
1157 AM CDT Sun Mar 25 2018 Temperatures are currently in the upper 30s to the lower 40s early this morning, as a cooler air mass has settled into the region. Southerly winds will help pull increased moisture north ahead of the low. Lift will develop ahead of the low triggering scattered thunderstorm development across eastern Kansas late this evening which will then track east across the area overnight into Monday. An upper level trough will slowly spread east out of the southwestern U.
922 AM EDT Sun Mar 25 2018 High pressure to end the weekend and start the next work week, with a warming trend.
720 AM EDT Sun Mar 25 2018 Strong high pressure will drift east across Quebec through Monday, with a ridge extending down into the Great Lakes providing more dry weather. Another chilly day expected today before warmer air arrives during the first half of the work week.
608 AM CDT Sun Mar 25 2018 Temperatures are currently in the upper 30s to the lower 40s early this morning, as a cooler air mass has settled into the region. Southerly winds will help pull increased moisture north ahead of the low. Lift will develop ahead of the low triggering scattered thunderstorm development across eastern Kansas late this evening which will then track east across the area overnight into Monday. An upper level trough will slowly spread east out of the southwestern U.
734 AM CDT Sun Mar 25 2018 Southwest mid level flow becomes prevalent today ahead of an amplifying western CONUS trough. Bufkit sounding analysis still indicates a potential for freezing rain given a warm nose aloft. There is still uncertainty however, given progged surface temps will be right around freezing. the northwestern part of the forecast area (generally along and north of a Morris to Lake Mille Lacs line) looks to have the potential to pick up 1-3 inches of snow, while freezing rain could still be a threat east and south of that line during the morning.
725 AM EDT Sun Mar 25 2018 A backdoor cold front pushes to the south today.
1035 AM CDT Sun Mar 25 2018 Partly to mostly cloudy skies acrs the region with temperatures already in the lower to middle 70s, on track to reach highs around 80 expected. Temperatures will rise into the lower 80s over inland areas. A similar albeit slight warmer day is expected for Monday.
723 AM EDT Sun Mar 25 2018 An upper level trough over the northeast conus will lift out to the east on Monday, as ridging builds in from the Great Lakes. A slow moving cold front will likely push through the region during the second half of the week. Mixing down model 850mb temps of around -7C translate to expected highs from the upper 30s over the higher terrain of the Alleghenies, to the low and mid 40s in the valleys. Ridging at the surface and aloft will build over the area tonight and Monday, ensuring fair weather and light winds.
Temperatures this morning were about 4-8 degrees warmer than 24 hours ago and will continue to warm through the day topping out in the upper 70's to the mid 80's this afternoon. High pressure over the western Atlantic will extend westward across the waters through today and Monday as a back door cold front washes out over the region. Another area of high pressure to the north will then extend southward across the region through the middle part of the week, with an easterly flow setting up.
609 AM CDT Sun Mar 25 2018 Satellite imagery this morning shows a ridge in place across the center of the Nation, with a large synoptic level trough to our west digging into the mountainous west with the help of a strong jet streak that is rounding the troughs base in northern Mexico. Expectation are that the jet streak will slow the progress of the main trough as we transit into the work week, which ensemble and operational models agree with, setting the stage for a persistent southwest flow across the Lower Missouri River Valley late Sunday night through at least the middle of the coming work week.
1029 AM EDT Sun Mar 25 2018 High pressure will allow for dry conditions across the region today. High pressure and dry conditions will be in place for the near term. At the surface, a warm front will lift across the region on Monday night.
Main show will commence tonight as the main upper trough pushes into the region and supports increasing LSA. Initial round of convection will develop off the high terrain of eastern WY this afternoon, propagating NE and becoming elevated. Snow will begin to taper off late Monday morning into the early afternoon, with temps expected above freezing most places. For the remainder of the week, western CONUS ridging will prevail Tues and beyond, with the Northern Plains under active NW flow at the edge of the central NOAM trough. This will support cooler than average temps with periodic chances for rain/snow showers at times. This would support a much more pronounced central CONUS trough, with the potential for much below normal temps toward the end of the week. Some freezing rain/drizzle possible over south central South Dakota today.
833 AM CDT Sun Mar 25 2018 Latest public reports via social media indicate light freezing rain from Ashley to near Fredonia. RAP BUFKIT soundings in Ashley/Mcintosh County, indicate supercooled water droplets with enough vertical motion to produce freezing rain. Farther east into Oakes/Dickey County, the column becomes saturated by mid morning allowing for a transition from light freezing rain to snow. Both precipitation types are supported by the high resolution ARW West and NMM West. Radar trends through 1040 UTC coupled with 09 UTC RAP soundings favor a band of freezing rain to propagate into these areas from northern South Dakota. Snowfall amounts are highly uncertain given the likely narrow nature of the band of the highest snowfall rates, and surface temperatures in the lower 30s.
1010 AM EDT Sun Mar 25 2018 A back door front has shifted into the southern portion of the area early this morning bringing rain, with wedge conditions and associated low cloudiness and cooler temps lingering through the day.
As the low clouds return tonight, models indicate drizzle over the eastern plains. SW flow aloft will continue across the area as an upper level trough eventually moves into the Great Basin by tonight. Overall as the upper level trough moves into the Great Basin by tonight will see some minor mid lvl ascent along with an increase in upper level divergence. Over the higher terrain cross- sections show rather limited moisture so will keep pops mainly confined to the nrn mtns. As far as highs over nern CO, there will be a stalled fnt over the far nern corner so readings may only reach the lower 50s their while closer to the foothills readings reach the mid to upper 60s.
Leading edge of backdoor "wedge" cold front has moved just south of Eastman/Vidalia/Butler area and should be through the remainder of our forecast area (Columbus/Americus/Cordele) in the next 2-3 hours (early afternoon). Ahead of the front, temperatures have warmed into the lower-mid 70s.
543 AM MDT Sun Mar 25 2018 An unsettled pattern will continue over the next 24 to 48 hours as upper-level troughing translates eastward across the western CONUS through late Monday. A cold front will progress southeast into our western and northern zones this evening/overnight.
1018 AM EDT Sun Mar 25 2018 Strong high pressure will drift east across Quebec through Monday, with a ridge extending down into the Great Lakes providing more dry weather. Another chilly day expected today before warmer air arrives during the first half of the work week.
638 AM CDT Sun Mar 25 2018 Forecast changes with this update confined to increasing the threat of some freezing rain or sleet in the Barnes, Sargent and Ransom counties this morning as echoes approach from SD where a light glaze of freezing rain was reported. As this occurs precipitation chances will increase along an ahead of a warm front associated with the attendant lee cyclone. A few areas of freezing drizzle will be possible late Monday night across far eastern ND and northeastern MN, but confidence in this is low due to model disagreements. Potential impacts from this round of winter weather will likely be confined to the Monday morning commute as afternoon temperatures climb above freezing.
Some energy on the back side of the cold upper trough that moved through last night and early this morning will produce isolated to scattered showers over the area through this evening, but these showers will diminish in coverage after sunset and skies will begin to clear (at least partially). Tonight will be cold again for most areas with the potential for temperatures to drop below freezing in the west side valleys, particularly the Rogue/Illinois. Another disturbance will ride over the top of a building eastern Pacific ridge and this could graze NW portions of the area (mainly NW of the Umpqua Divide) with some light precipitation Monday. But, overall, expect the ridge to be strong enough this week to keep systems sufficiently to our north.
Temperatures are in the mid 70s with dewpoints in the lower 60s. An Atlantic ridge of high pressure extending across Central Florida will retreat eastward today.
1102 AM EDT Sun Mar 25 2018 A backdoor cold front pushes to the south today.
514 AM MDT Sun Mar 25 2018 An unsettled pattern will continue over the next 24 to 48 hours as upper-level troughing translates eastward across the western CONUS through late Monday. A cold front will progress southeast into our western and northern zones this evening/overnight.
1021 AM EDT Sun Mar 25 2018 An upper level trough over the northeast conus will lift out to the east on Monday, as ridging builds in from the Great Lakes. A slow moving cold front will likely push through the region during the second half of the week. Mixing down model 850mb temps of around -7C translate to expected highs from the upper 30s over the higher terrain of the Alleghenies, to the low and mid 40s in the valleys. Ridging at the surface and aloft will build over the area tonight and Monday, ensuring fair weather and light winds.
The low level moisture will support more cumulus clouds than we have seen in several days but no rain is expected. High pressure ridge axis analyzed to the south and east with a cold front draped across the deep south will produce a warm west southwest flow. This offshore flow will be strong enough to at least delay the onset of the east coast sea breeze boundary allowing most locations to reach the low to mid 80s, even at the beaches.
An upper level trough is moving through eastern WA and OR this morning.
1108 AM CDT Sun Mar 25 2018 HIgh pressure ridge axis reaching back into the Midwest from eastern Canada this morning. Strong high pressure over Quebec will keep the dry easterly flow continuing. This wet snow has been compacting even during the night, as temperatures remain above freezing. However, the highs in this area have been kept well below MOS guidance today, to reflect the solar energy going toward melting. Further south, highs in the lower to mid 40s are more likely, perhaps approaching 50 in the far southeast.
743 AM EDT Sun Mar 25 2018 Aviation High pressure will result in plenty of sunshine today, although it will continue to feel cool with highs in the lower 40s and a brisk east wind. The high will move off to the east tonight and Monday will bring a southerly flow of air to the region.
The low clouds may try to return across the Panhandle tonight.
Tonight a cold front will move through the forecast area, bringing rain and a slight chance for thunderstorms moving across the area from northwest to southeast during the night. By Friday morning precip should be moving out of all but the southeasternmost counties, and by noon Friday high pressure building in from the north should bring dry conditions to the entire area. During Friday night, the cold front that moved through the area and stalled should start to move back north, and could bring a small chance for showers back to the area late Friday night.
317 PM CDT Thu Nov 2 2017 Current weather maps reveal a cold front extending from Lake Superior southwest into the OK panhandle. At that time the earlier cold front will be retreating back to the north as a warm front. The upper pattern will become more west northwest with a slight ridging influence.
Ridging will begin to develop tonight into Friday with the upper level jet expected to lift to the north of the area. Lows tonight will likely drop into the 20s, but if winds and clouds can both hang in then lows may remain in the lower 30s.
Issued by National Weather Service HASTINGS NE 1217 PM CDT Thu Nov 2 2017 A little warm frontal fog was sneaking into far southeast NE this morning, with a narrow band of light rain just over the border in SD. Subjective 00Z upper-air analysis indicates broad and flattening upper-level trough across the central US, with 100-115kt upper-level jet extending from WA/OR across the Rockies and into western SD/western NE.
The main water areas that are likely to experience fog are smaller lakes, ponds, rivers and bayous, but even the tidal lakes and some cooler nearshore coastal waters and bays are marginally cool enough to support some patchy sea fog.
Vis satellite imagery this morning showing abundant low level cloud cover with 14z temperatures already in the lower to middle 70s with dewpoints mostly in the upper 60s to lower 70s.
High temps will be in the low to mid 80s today. Temperatures remain seasonable in the low 80s with mild overnight lows from the low 60s across Glades County to low 70s along the east coast.
Temps will be a bit warmer than yesterday with this trend continuing into the weekend.
Flow aloft is mainly zonal with weak troughing across the central CONUS. The pattern buckles a little as we see an upper trough dig into the Pacific Northwest. Ground temperatures are still above freezing, and I don't anticipate much for ice due to this, even though air temperatures will fall into the 20s tonight, though bridges and overpasses would be more likely to respond to the colder air temperatures this early in the season.
234 PM MDT Thu Nov 2 2017 Current surface map places high pressure ridge across the Dakotas.
High temperatures will continue to increase today with afternoon highs in the low 80s.
240 PM EDT Thu Nov 02 2017 Weak but warm high pressure will linger over the Carolinas and Southeast states through the end of the week.
With the forecast area still under the influence of the cold airmass on Friday behind the cold front that passed through the forecast area early Thursday morning, expect RH values to increase again Thursday night to the point of redeveloping areas of fog and additional low stratus mainly after midnight. From late morning through late afternoon, the lee trough that deepens along the front range begins to move east over the western portions of the forecast area while the cooler airmass pushes further east, but remains over the far eastern sections of the forecast area through the late afternoon and early evening.
Southerly flow keeps moisture pumping into the region with dewpoints back into the low-70s and with daytime highs well above average for early November. Ridging at the surface and aloft will keep a lid on rain chances today.
Moisture pool remains limited to the lowest 3500 feet, with the peak winds remaining underneath that capping layer.
A cold front will slide across the area this morning shifting winds to a northerly direction and becoming breezy. Cold air advection will continue through the afternoon allowing for cooler temperatures than yesterday. Winds shift to more of an east to northeasterly direction tonight as the ridge axis shifts eastward. Lows tonight are progged to range from around freezing across west central Kansas to low 40s across south central Kansas.
So, compared to yesterday's 12Z runs, today's 12Z runs are much more robust now on picking up the low level dry air advecting down across the eastern half of the Dakotas and the state of Minnesota. It's probable there will be some stratus leftover behind the snow, from which a little bit of light drizzle or freezing drizzle could occur.
and Friday The main area of precipitation was moving out of far northeast WI early this morning, leaving patchy light rain, drizzle and freezing drizzle across the region. Canadian high pressure will dominate our weather tonight into Friday. Northwest flow off Lake Superior may lead to patchy light snow showers or freezing drizzle over Vilas county tonight, but dry conditions are anticipated elsewhere. Highs on Friday will range from the middle 30s northwest to the lower to middle 40s southeast.
Meanwhile, a cold front stretches along the I-44 corridor from St.
329 PM CDT Thu Nov 2 2017 Unseasonably warm conditions this afternoon south of approaching cold front, resulting in near record high temps in a few locations. Cold front currently stretches from central Missouri back into western Oklahoma, and persistent low clouds have kept temperatures in the lower 50s across much of Kansas this afternoon.
342 PM EDT Thu Nov 2 2017 Low pressure developing west of the region this morning will drag a warm front into the North Country today, followed by a trailing cold front on Friday with periods of rain expected with both frontal passages.
307 PM EDT Thu Nov 2 2017 Much warmer air will spread north across the region and persist across at least the southeastern half of Pennsylvania on Friday. A weak cold front will move through the area Friday with a few showers likely, mainly over the northwest third of the state.
301 PM CDT Thu Nov 2 2017 Cold front as of 1900 UTC is just northwest of a KMYJ>>KPPQ line and should continue to slowly progress southeastward through tonight. By 0600 UTC, the front should have cleared the CWA with drier and cooler air filtering into the region.
Light rain will develop along the coast and gradually spread inland tonight, followed by heavier rain and cooler temperatures on Friday.
And while all but NW Montana are at the present time experiencing a brew interlude in the steady snowfall, an approaching upper level low over Western Washington will produce steadily increasing snow across much of North Central Idaho and Western Montana later tonight into Friday. Expect snowfall to gradually enhance throughout the day Friday, especially over Idaho County, Idaho and much of the Bitterroot into SW Montana as the cold frontal boundary finally moves SE towards Wyoming.
545 PM CDT Thu Nov 2 2017 At 3 PM, the cold front which moved through the region this morning was located over Lower Michigan and northwest Indiana. 00z models continue to show that high pressure will build across the region. This along with light boundary winds in central Wisconsin would allow temperatures to cool into the lower 20s. On Friday, the clouds will rapidly increase ahead of an approaching warm front. 00z models continue to show that a warm front will move north through the region. The highest liquid amount in this band ranges from two tenths to a third of an inch.
258 PM EDT Thu Nov 2 2017 Much warmer air will spread north across the region and persist across at least the southeastern half of Pennsylvania on Friday. A weak cold front will move through the area Friday with a few showers likely, mainly over the northwest third of the state.
Gusty southwest winds will continue this afternoon ahead of cold front which will move into NE OK by mid/late afternoon. Front will continue to push southeast overnight, briefly stalling in the higher terrain areas of SE OK/NW AR by Friday morning. As low moves into east-central Oklahoma, cold front will push into northeast Oklahoma by late afternoon. Mostly sunny skies should allow temperatures to warm into the lower to mid 80s ahead of the front across portions of eastern Oklahoma and west-central Arkansas.
A weak cold front will move into the Big Country this this evening, then stall across central portions of the forecast area during the early morning hours. Cooler temperatures are expected across much of the Big Country behind the front, with highs generally in the mid 70s to lower 80s. For now, the forecast reflects a compromise between the cooler NAM and the warmer GFS. An upper level ridge will be over northeast Mexico and South Texas, expanding east across the Gulf Coast this weekend.