Aikyam-Lab/Synoptic-Bench huggingface dataset:
A weak cold front is shifting winds from the east with speeds holding generally below 15kts. /issued 417 AM CDT Sun Apr 1 2018/ Looking at a complicated temperature forecast this Easter as each weather model offers a different solution as to where a cold front will settle. Low clouds and much cooler temperatures will fill in tonight behind the front which will likely only make it to the Pecos River. A weak upper level trough will move east across northern Mexico early this week.
06Z surface data has high pressure over the Plains with an upper level disturbance moving across Nebraska.
Satellite imagery shows the upper low and cold front moving along the southern BC coast this morning approaching the Pacific northwest. With the low and cold front moving closer precipitation will increase in coverage especially along the Cascades and northeast Oregon mountains. Morning soundings showed a freezing level of 6k at Salem and 3k at Quillayute so snow levels will be fairly high for much of today and then decrease rapidly overnight with the strong cold advection. As the upper low moves across Washington tonight expect this will result in the best chance of rain and snow across the region. Significant snow accumulations are possible over the mountains with the highest amounts in the Cascades and Blues.
Warm and dry today with increasing clouds from the northwest this afternoon ahead of the next upper level trough for early Monday. A strong fast moving cold front will move across the forecast Monday morning reaching Burns/Baker City around 09z, Boise Metro around 11z and Twin Falls/Jerome around 13z. Strong surface cold front moving south 02/00Z through 02/15Z with brief but numerous rain and snow showers and local IFR. Showers noted over portions of the Treasure Valley and into the Western Magic Valley are associated with the passage of a weak cold front. Weather changes expected on Monday with the arrival of a stronger cold front. Cooler temperatures on Monday will bring values 5 to 10 degrees below normal.
High pressure will provide for mainly clear skies and above normal temperatures across the area through the middle of the week.
/issued 427 AM CDT Sun Apr 1 2018/ SHORT TERM (Now through Monday): West to northwest flow aloft will continue over region through the period as deep south Texas remains on the northern periphery of 500 mb high pressure. The pressure gradient will strengthen today as high pressure across the Gulf of Mexico interacts with lower pressure across the Southern Plains. Above normal temperatures are expected with high temperatures today and Monday ranging from the lower 80s at the beaches to the low to mid 90s inland, low temperatures tonight will be around 70.
The low clouds were intermittently resulting in MVFR cigs early this morning, with MVFR reductions in vsby due to BR at AEX and vsbys beginning to lower (but currently VFR) at LFT. Southerly flow return has begun impacting overnight low temperatures this morning from southwest Louisiana into extending into southeast Texas where lows were in the low to mid 60s. but low clouds were poised just offshore and will likely see a few more low clouds this morning before daytime mixing the lower clouds out. Southerly flow is expected to slowly increase this afternoon across the area with a north Texas cold front eventually stalling today and moving back to the north as a warm front Monday.
859 AM PDT Sun Apr 1 2018 A low pressure trough off the coast will drift inland through Monday, deepening the marine layer, and spreading clouds and cooling well inland across the valleys and onto the lower coastal slopes.
1053 AM EDT Sun Apr 1 2018 Hydro A chilly day is in store but some sunshine can be expected as high pressure builds into the region.
1035 AM EDT Sun Apr 1 2018 Shallow inverted trof over the Atlc housing the remnants of a dissipating frontal boundary. Mid/upr lvl dynamic support is quite weak, however, as RAP40 analysis reveals an H85-H50 ridge and an H30-H20 trof axis draped over central FL. 0C/KM are marginal at best, so precip formation will require the low lvl forcing generated by the east/west coast sea breezes. Shallow inverted trof over the lcl Atlc housing a dissipating frontal boundary. light to gentle N/NE breeze west of the trof axis, E/SE east of the axis.
833 AM CDT Sun Apr 1 2018 Early morning surface analysis shows a classic shallow modified arctic cold front wedged up against the terrain of W AR/SE OK. Based on the latest surface temp progs from the NAM12 and HRRR, the freezing line should penetrate into NE OK this afternoon, mainly areas up near the KS border. With the idea that the bulk of the QPF will be shifting north and east with time today by the time the freezing line moves in, icing amounts will be very light at best. Included a mention of freezing drizzle at KTUL/KRVS/KBVO this afternoon. It will be cold enough for freezing precipitation, but it will depend on where the areas of drizzle develop.
Given the colder Sea Surface Temperatures this time of year and the coastal trough just offshore it makes sense and thus have kept the Advisory up through 4 p.
A cold upper level trough will bring a fast-moving cold front to northern and central Utah Monday.
The narrow ridge in place over Montana will nudge the cold boundary a bit east today, resulting in a bit of warming. Highs today are expect to be around 10 degrees warmer than yesterday. SCT Previous Discussion: A weak ridge should keep skies clear this morning and allow high temperatures to reach the mid to upper 30s south of the Missouri River, although highs north will struggle to reach the low to mid 20s. This ridge quickly collapses ahead of a rather strong upper low approaching the region from the Pacific Northwest tonight.
Daytime heating and sea breeze circulation along with some residual moisture left over by the dissipating cold front will help to foster some afternoon showers across the interior. High pressure will continue building across the SE with the ridge axis extending across the peninsula into the northern Gulf.
Northwest flow is in place in the mid-upper levels, with ridging over the Canadian rockies. NW flow on western extent of Hudson Bay upper low will continue to keep colder temps in place through these periods, and below normal highs/lows are anticipated once again. Highs for the entire week will remain below freezing. The next chance for snow will develop on Mon afternoon and last through Tue morning as a lee cyclone moves into the Northern Plains. But high pressure and drier air over this region may well win out again, making the GFS/ECMWF more prudent at this time. Tue would likely be coldest in the wake of departing system with fresh high pressure dropping south.
At 16z, a cold front was located from near Brady TX, to Fort Worth TX, to near Sherman TX, to north of Antlers OK, to near Talihina OK, and into Western Arkansas.
528 AM MDT Sun Apr 1 2018 A broad trough covers the CONUS, with northwest flow over the northern plains. At the surface, high pressure rests over SD. Weak ridging will develop over the region today, as an upper low pushes into the Pacific Northwest. Pac NW upper low will become an open wave Monday as it crosses the northern Rockies.
The 500 mb pattern is now transitioning from a three wave pattern around the hemisphere to a five, although there is a large blocking high over western Alaska and eastern Siberia. Three is stagnant or regressive while five is progressive, so things should get moving as soon as the blocking high drops out of the picture. A flat ridge is now breaking down over the area as a strong short wave moves down the west coast of British Columbia. It will also be windier, especially over the ridges and east of the Cascades. Once the wave moves out, flat ridging will return along the west coast. Precipitation will end by Monday afternoon and the thermal trough will rebuild along the coast. It will be cooler Monday with inland highs around 5 degrees below normal, except 5-10 degrees below normal in the Umpqua Basin.
Included a mention of freezing drizzle at KTUL/KRVS/KBVO this afternoon. It will be cold enough for freezing precipitation, but it will depend on where the areas of drizzle develop.
1249 PM EDT Sun Apr 1 2018 Aviation A chilly day is in store but some sunshine can be expected as high pressure builds into the region.
Highs mostly in the mid 30s over central IL and 40-45F in southeast IL by early afternoon, but temps in central IL falling to around freezing as snow develops during the mid/late afternoon. Cold front has dropped to the southeast of the forecast area this morning. Northwest winds dominate the region with cooler air filtering in behind the front. High pressure is building into the Midwest from the Northern Plains.
1000 AM EDT Sun Apr 1 2018 A stationary front over South Florida will slowly dissipate today allowing high pressure to start to build into the area from the Western Atlantic Waters tonight. Therefore, the pops have been adjusted a little bit for this afternoon across South Florida with the highest pops over the western interior areas.
High temperatures are on track to be in the upper 70s, flirting with the low 80s in a few places.
The frontal zone will also create a big temperature contrast, with highs ranging form the lower 50s along the KY border, to around 70 at the AL border. A slow-moving cold front has entered Middle Tennessee, with a band of light showers accompanying the surface boundary.
846 AM CDT Sun Apr 1 2018 Early morning surface analysis shows a classic shallow modified arctic cold front wedged up against the terrain of W AR/SE OK. Based on the latest surface temp progs from the NAM12 and HRRR, the freezing line should penetrate into NE OK this afternoon, mainly areas along or just north of Interstate 44. With the idea that the bulk of the QPF will be shifting north and east with time today by the time the freezing line moves in, icing amounts will be very light at best. Included a mention of freezing drizzle at KTUL/KRVS/KBVO this afternoon. It will be cold enough for freezing precipitation, but it will depend on where the areas of drizzle develop.
Occasional rain showers could affect area terminals through the TAF period as a cold front will become nearly stationary across the middle of the state. Today Through Monday Night Surface cold front continues to slowly sink south early this morning, with isolated to scattered showers along and north of the boundary. High pressure and colder temperatures are expected to build in across northern Arkansas through the day. Even with clouds in place and rain chances persisting, temperatures across northern Arkansas will fall into the lower 30s with some patchy 32F readings expected.
A cold front is sagging southward through the Mid South this morning and currently extends from just south of LIT to near CKM to BNA. On the surface a cold front was slowly approaching from the northwest. The weak cold front will stall across the northwest delta by late today into tonight as upper support weakens.
Chattanooga Airport, TN 73 53 74 56 / 10 20 20 10 Knoxville McGhee Tyson Airport, TN 66 52 67 55 / 20 30 20 20 Oak Ridge, TN 64 51 66 55 / 30 40 30 20 Tri Cities Airport, TN 62 49 63 51 / 30 50 30 20.
725 AM EDT Sun Apr 1 2018 Aviation A chilly day is in store but some sunshine can be expected as high pressure builds into the region.
937 AM EDT Sun Apr 1 2018 High pressure will move off the coast today.
1011 AM EDT Sun Apr 1 2018 High pressure will remain across the region today.
839 AM PDT Sun Apr 1 2018 A vigorous low pressure system will bring rain and snow to the Idaho Panhandle and the Cascades today into Monday.
523 AM EDT Sun Oct 22 2017 A large area of high pressure centered off the New Jersey coast will bring spectacular Autumn conditions today through much of Monday, to enjoy the near peak color of the fall foliage. A high-amplitude and deepening, cold upper trough will become located across the eastern U.
335 AM CDT Sun Oct 22 2017 08z/3am surface analysis shows a slow-moving cold front approaching the Mississippi River. High temperatures will range from the lower 60s northwest of the Illinois River. An upper wave currently evident on water vapor imagery over the Oklahoma/Texas panhandles will track eastward and eventually close off across the Lower Mississippi River Valley tonight. As it does, it will slow the eastward progression of the cold front and keep rain chances alive across much of the area tonight.
1142 PM MDT Sat Oct 21 2017 Some lingering clouds and light snow continued into the early afternoon behind the latest cold front and trough passage along the northern and central divide mountains, with not much impact. Skies were mostly clear aside from that with much cooler temperatures this afternoon than 24 hours ago, on the order of 20 degrees cooler. Expect these clouds and light snow showers to dissipate late this afternoon as high pressure builds to the west and the trough shifts further eastward.
327 AM MDT Sun Oct 22 2017 A fast moving Pacific cold front will move through the region today. A strong mid level jet with winds up to 80 knots around ridgetop was passing over the region early this morning. A cold front will sweep though the area this afternoon providing further support to transport strong winds to the surface. Mountain Snow - Snowfall is expected over the higher elevations, especially over the Rocky Mountain Front. Hunters and those recreating in the higher elevation should be prepared for difficult conditions due to snow in addition to the wind hazards.
130 AM CDT Sun Oct 22 2017 For the 22/06Z terminal forecast expecting the few sites with VFR flight categories to deteriorate to MVFR and IFR as a strong inflow of Southerly low level moisture out ahead of an approaching upper level storm system and cold front advance across the Four State Region. After passage of the cold front there will be a brief period of VFR followed by a return to MVFR as low clouds in the colder air fill into the region. Squall line has congealed along a cold front and will be moving into our nrn and wrn portions of the region within the next hour or so.
249 AM EDT Sun Oct 22 2017 High pressure will extend across the eastern United States through tonight. High pressure over the area will drift slowly eastward, eventually shifting offshore on Sunday. Lows ranging from upper 40s/near 50 in the typically cooler outlying areas to lower-mid 50s elsewhere. High pressure at the surface and aloft will drift offshore Sunday as a s/w digs into the lower MS Valley. Clouds will continue to increase and thicken Sunday night as the s/w deepens and becomes a closed low over the western TN Valley by early Monday.
Lingering showers/storms will persist through the morning hours with decreasing chances for precipitation from west to east, eventually ending by late afternoon across the far southeast cwa as the upper level low tracks east across the area. Much drier air will move into the area behind the upper trough and we should see clearing from west to east tonight. A strong upper level jet will begin to dive soutehast out of Canada into the plains on Monday and will carve out another trough across the central U. A cold front will push through the area during the day on Monday, but with the drier air moving into the region tonight, precipitation is not expected.
426 AM EDT Sun Oct 22 2017 Dry and warm weather will continue today as high pressure moves off to the east.
A mild westerly flow aloft will result in warmer temperatures today. A weak weather disturbance will bring slightly cooler temperatures to the region tomorrow. Strengthening high pressure across the western states will bring warm and dry conditions to the Great Basin midweek.
Elsewhere, a few very light rain showers linger over portions of northwest/north central North Dakota as the trough lifts through, so have added a mention of isolated showers for a couple of hours. Sunday afternoon through Monday another cold front is forecast to move across the state. The preceding warm front will produce highs in the upper 50s and upper 60s; generally another seasonably warm day for most of western and central ND on Sunday.
422 AM CDT Sun Oct 22 2017 The cold front has moved through the forecast area, but the southwest winds behind the front will give us another warmer than normal day. Hence today will be a partly cloudy day with most areas reaching the low to mid 60s.
A special 04z sounding showed instability increased a bit from 00z while the low level jet and resulting shear parameters had increased. Showers will persist behind the initial line of storms as the cold front sweeps across the area. As of 2 PM, a cold front extended from eastern Nebraska through central Kansas and into the Oklahoma Panhandle. The cold front will be in the process of moving through the Ozarks during the first half of day Sunday. A deep upper level trough will slide across the center of the country with models cutting of and upper low over the bootheel region Monday night.
252 AM EDT Sun Oct 22 2017 Expect a continuation of above normal temperatures and dry weather today and Monday as high pressure remains over the area.
511 AM EDT Sun Oct 22 2017 The dry and warm weather will continue into Monday, under a large area of high pressure.
323 AM EDT Sun Oct 22 2017 Expect a continuation of above normal temperatures and dry weather today and Monday as high pressure remains over the area.
In addition, MVFR ceilings are expected to develop this morning in advance of an approaching cold front. The cold front currently extending across Oklahoma and northern Texas will continue to move SE during the overnight hours.
Line of storms will continue to push across Southeast Oklahoma and Northwest Arkansas as a cold front moves through the region. The cold front extended from near KC down into northeast OK, just to the north and west of Tulsa, and then down into south central OK at 9 PM. The line of storms which developed late into the afternoon and evening from southwest into north central OK will now begin to move more quickly to the southeast for the remainder of the night in tandem with the cold front.
Temperatures were in the lower 80s across the Keys as of 4 am. A high pressure system was located over the mid-Atlantic coast earlier this morning, stretching towards Florida. This high will move northeast and away from the local area today. At the same time, an area of low pressure will get better organized over Arkansas and lift northeast tonight and tomorrow Monday.
140 AM EDT Sun Oct 22 2017 A large area of high pressure centered over Pennsylvania and eastern Virginia this afternoon will drift east of the area by late Monday. This high will give us a spectacular Autumn conditions for Sunday and much of Monday, to enjoy the fall foliage. A high-amplitude and cold upper trough will become carved out across the eastern U.
Today's highs will be largely 8-15 degrees warmer than yesterday â upper 60s to lower 70s. Lows will be mild as well, lows are forecast in the lower to mid 40. Large scale pattern features a upper level ridge building eastward across the Central Plains with modest 500 hPa height rises evolving overhead. This will promote the advertised warmer temperatures and overall lower afternoon humidity today. Tonight, a weak cold front advances southeastward across western and north central NEB.
Rain will likely engulf the entire forecast area Monday into Monday evening as low pressure develops into the Great Lakes region.
330 AM EDT Sun Oct 22 2017 High pressure will extend across the eastern United States through tonight. High pressure over the area will drift slowly eastward, eventually shifting offshore on Sunday. Lows ranging from upper 40s/near 50 in the typically cooler outlying areas to lower-mid 50s elsewhere. Low level flow will be increasing and providing a strong moisture feed into the southern mountains early Monday, with low level jetting increasing to exceed 50 knots as the flow veers increasingly southerly and begins marching east ahead of an associated surface cold front. In addition, the low level shear profile would support rotation in stronger storms, so isolated tornadoes cannot be ruled out.
No additional rain is expected until late this week when a little moisture return occurs between cold fronts. There will be minimal recovery from the cool airmass that is currently spreading over the southern Plains before another cold front sweeps south across Oklahoma and north Texas Monday and Monday.
611 AM EDT Sun Oct 22 2017 High pressure will move east of the region today into Monday.
Early this week, drier conditions are expected along with warming temperatures into the low 60s in the valleys and 50s in the mountains. Mid-week a disturbance (cold front) from the north remains in our forecast; though its impacts on our area appear quite low at this time.
345 AM CDT Sun Oct 22 2017 An upper level trough was progressing eastward into the Plains this morning at 0730Z with the trough axis across western Kansas. The upper trough will move over eastern Kansas this morning with the axis moving into Missouri this afternoon. A cold front will move southeast across the central Plains overnight as an mid level trough moves across the northern Plains.
Ceilings will lift quickly into VFR category when the cold front passes shortly after thunderstorms. /issued 210 PM CDT Sat Oct 21 2017/ The cold front continues to progress southward this afternoon across northwestern OK, with a few elevated showers quickly lifting northeast ahead of it. Tomorrow will be quiet with much cooler and drier air moving into the Southern Plains. A brief warmup is expected Monday, but another cold front will arrive Tue.
348 AM CDT Sun Oct 22 2017 An elongated ridge of high pressure has settled into the forecast area in the wake of the cold front that is moving into the Mississippi Valley region this morning.
125 AM EDT Sun Oct 22 2017 High pressure continues through Sunday. A strong cold front and low pressure system crosses Monday and Monday night, with much cooler weather by midweek. Intervals of cirrus through Sunday as high pressure shifts to the east. Models showing an upper level low pulling moisture into the region on Monday. Cold front should push through late Monday/Monday evening.
325 AM CDT Sun Oct 22 2017 A progressive, broad and sharp trough across the central U. is pushing a cold front and associated rain axis through eastern Iowa into northwest Illinois this morning. Passage of the cold front today will mark a transition to more seasonal temperatures while also dropping light to moderate rain across the area. Much cooler temperatures are expected overnight with readings widespread in the 40s, especially if clouds clear overnight as currently expected. Temperatures Monday and Monday night should be close to late October normals with highs in the low to mid 60s and lows in the low to mid 40s.
557 AM CDT Sun Oct 22 2017 08z/3am surface analysis shows a slow-moving cold front approaching the Mississippi River. High temperatures will range from the lower 60s northwest of the Illinois River. An upper wave currently evident on water vapor imagery over the Oklahoma/Texas panhandles will track eastward and eventually close off across the Lower Mississippi River Valley tonight. As it does, it will slow the eastward progression of the cold front and keep rain chances alive across much of the area tonight.
Under mostly sunny skies, this will allow highs to push the lower 70s(F) late this afternoon.
139 AM EDT Sun Oct 22 2017 Mild conditions will continue the rest of this weekend before cooler weather arrives to start the work week.
For tonight, upper level energy begins to dive southward into the Northern Plains while a cold front swings through the area. In spite of ensuing cold air advection, temperatures will remain in check overnight with increasing clouds and wind, with lows dropping into the lower to mid 40s. On Monday upper level energy continues to drop southward as a trough deepens over the central CONUS.
Drier conditions develop tonight and Monday as an upper ridge builds along the coast, cutting off the moisture tap. Temperatures are about 10 degrees warmer today.