Aikyam-Lab/Synoptic-Bench huggingface dataset:
Any blowing/drifting snow will be minimal across these areas because of the warmer temperatures melting the freshly fallen light snow today. These winds will abruptly shift to the west later this afternoon as the surface warm front moves into the forecast area. While temperatures will temporarily rise above freezing behind the warm front, a cold front will then drop south later this evening and overnight, re- freezing any melted snow on untreated roads.
633 PM EST Mon Jan 30 2017 Weak high pressure will build across tonight. Low pressure dropping out of the northern Plains will approach on Tuesday, then weaken and drift to the north as a secondary low develops offshore.
There will be a large gradient in surface temperatures tonight between colder valleys and warmer ridgetops due to a strong low level temperature inversion. /issued 318 PM CST Mon Jan 30 2017/ A weak cold front will move south across most of Oklahoma by noon on Tuesday, bringing only slightly cooler air into the region.
It will be dry through the period with mostly clear skies expected during the next 24 hours as flow aloft continues from the west northwest and the cooler air remains well to our north.
343 PM PST Mon Jan 30 2017 High pressure aloft will bring fair skies and above normal temperatures into Tuesday.
/issued 335 PM EST Mon Jan 30 2017/ A weak cold front is completing its journey southward across the peninsula of Florida this afternoon. In its wake this evening, clearing skies and cooler temperatures will be ushered into South Florida. While temperatures may not warm up to the "Chamber of Commerce" averages that many come to expect in South Florida this time of year, the lack of strong wind will help keep things feeling warmer, particularly when standing in direct sunlight.
The winds will shift back to the northwest this evening though as a cold front, associated with the low over MN, moves through the area.
/Tonight through Tuesday/ Area of low pressure centered across central MN to slide east/southeastward into eastern WI overnight. For Tuesday temps to remain above average but still be several degrees cooler than temps today with strong caa expected through the day. Expect more steady or slightly falling temps across the north, with mainly cloudy conditions with low stratus in place behind the cold front pushing south late tonight.
As the trough passes, a weak front will move southward overnight and likely ease through the far southern Panhandle and northern portions of the Rolling Plains on Tuesday.
At this time, am keeping min temperatures above freezing as a result, although will have to watch our eastern valley cold pockets for evening drainage cooling.
The Canadian cold front is expected to move down from Canada during the day Tuesday and stall around west-central and southwest Montana. The higher amounts will likely be focused along a narrow band just ahead of the cold air boundary.
Low pressure circulation over northwest Old Mexico to drift westward today, dragging clouds and moisture with it.
LIFR CIGS have developed at KVCT and KLRD, and should continue until about 15Z or 16Z then could become MVFR or even VFR (potential for MVFR most likely at KLRD where rainfall will likely keep the lower clouds). Rainfall should diminish by midnight, and think POPs overnight may be a bit on the high side. Main thing is that it will be cooler over the next two days, especially high temperatures.
The secondary frontal boundary with cooler air behind it was in the Hill Country. LIFR CIGS have developed at KVCT and KLRD, and should continue until about 15Z or 16Z then could become MVFR or even VFR (potential for MVFR most likely at KLRD where rainfall will likely keep the lower clouds).
Cooler aloft as well with 500 mb temp at -8. Low pressure aloft over the NE Gulf of Mexico drifting a little south today.
Temperatures marginal for the frost advisory with readings mainly in the lower to mid 40s but there are some mid 30s across the Palmer Divide and over the Northeast plains as well so will keep the advisory in place as expect a bit more cooling before sunrise. Building high pressure over the Western Great Basin will keep a moderate Northwest flow aloft over Colorado.
The leading edge of the cooler airmass lagged back acrs NWRN AR where temps were arnd 60. readings were still in the lower and mid 70s.
728 AM CDT MON SEP 26 2016 Cold front continues to make slow but steady progress across Northeast Texas this morning. Some isolated thunderstorms will also be possible through the remainder of today with a cold front continuing to advance east across the region. /issued 422 AM CDT MON SEP 26 2016/ Cold front entered our northwest CWA early this morning and is now just south of I-30 with a few showers developing invof the front during the past hour. Due to the lack of deep layer moisture and limited upper level support, have maintained lower pops despite the presence of this front which should continue to slow its forward progress as it encounters some resistance due to weak ridging still present to the east.
Colder and drier air will flow in behind a cold front today, ending rain this morning. An upper low will bring more rain chances mid to late week. /Today/ Scattered to numerous thunderstorms were along and just ahead of a cold front moving through central Indiana early this morning.
859 AM EDT MON SEP 26 2016 The satellite viewpoint shows a mid to upper level low over the Florida Big Bend area. South of this low we find very good upper level diffluence over South Florida and the Keys area this morning. The diffluence aloft and light winds in the lower levels with enhance ventilation above any convective cells that move through the area today. Will keep likely showers and thunderstorms today and continue the high end chance of showers and thunderstorms overnight and Tuesday. The mid level portion of the low over North Florida will gradually break down into a trough through tonight.
The weekend low was pulling away from the area as high pressure ridging moved in. For tonight, with light wind, a clear sky, and forecast dew points in the lower to mid 30s will expect patchy frost. At this point the lowest forecast low temperature is 36 so we'll not expect frost to be widespread enough to warrant an advisory.
The upper low across northern Minnesota will continue to slowly propagate east today, stalling across the northern great lakes region tonight. Using 850mb temps as a proxy for the airmass, and mixing to about this height leads to max temps in the low 60s across eastern ND and mid 50s into Minnesota.
This should dry things out nicely today with ridging building in. Conditions this afternoon will definitely feel fall-like as temperatures will only reach into the lower to middle 70s and combine with the breezy winds out of the northwest. An upper level low from the western Great Lakes will bring cooler air into the Midwest through the end of the week. However, the medium range models disagree as to the position of this low and how long it may linger in the region.
710 AM EDT MON SEP 26 2016 Showers and thunderstorms are likely at all TAF sites this afternoon as a cold front pushes through the area.
Broad scale subsidence will ensure sunny skies across the area today with thermal trof becoming established across Wisconsin. Central Iowa will be on the backside of the thermal gradient with temperatures becoming warmer to the south and west today.
Colder and drier air will flow in behind a cold front today, ending rain this morning. An upper low will bring more rain chances mid to late week. Scattered to numerous thunderstorms were along and just ahead of a cold front moving through central Indiana early this morning.
Upper level low pressure will continue to develop over the Lake Superior region today through Tuesday. Numerous showers will continue to wrap around the upper level low as it parks itself over the Lake Superior region. An upper low exits to the east with high pressure building in across the upper Midwest towards the weekend.
Early morning satellite imagery and RAP upper level analysis shows large scale ridging in place across the western US, with a trough over the northern Mississippi River Valley. NW flow aloft is primarily holding influence across the Central High Plains, with ridging beginning to build across the Central Rockies. At the surface 1027-1028 MB high pressure is in place over our CWA. Regarding Frost Advisory this morning: Tds have decreased into the low to mid 30s and temps have declined to near 40F (upper 30s at a few locations).
1253 PM EDT Mon Sep 26 2016 High pressure along the mid-Atlantic coast will move east today. An area of low pressure off the coast of Georgia this evening will move northeast tonight and Tuesday. A cold front will pass through from the west Tuesday night.
701 AM EDT Mon Sep 26 2016 High pressure along the mid-Atlantic coast will move east today. An area of low pressure off the coast of Georgia this evening will move northeast tonight and Tuesday. A cold front will pass through from the west Tuesday night.
A nearly stationary upper level low continues across the Florida panhandle into the eastern Gulf and extends eastward across the Florida peninsula and adjacent Atlantic waters. In addition guidance trends indicate that mid level temperatures later today could reach near 3 degrees cooler than seasonal normals across portions of the interior peninsula, which is significant. In addition, with the current orientation of the upper level trough, westerly upper level winds could increase to about 40 to 45 knots across South Florida later today.
756 AM EDT Mon Sep 26 2016 A ridge of high pressure will move east of the region today. All models show a cold front with decent moisture passing through the region and a dry slot developing over the North Country however there is about 12 hours difference in the timing between the GFS and the NAM/GEM/EC with the GFS as the more progressive system. Then as the dry slot moves in over the North Country the parent upper level low gets sheared off and is broken up with the front sagging offshore into the Atlantic. The closed circulation of the upper level low then pivots down from central Ontario into the Ohio Valley region by mid week.
Overall, forecast on track this morning as a cold front approaches our area. Latest surface obs show the cold front now moving into Crossville. Chattanooga Airport, TN 88 62 80 53 / 60 30 10 0 Knoxville McGhee Tyson Airport, TN 86 59 78 50 / 60 40 10 0 Oak Ridge, TN 84 56 80 50 / 60 30 10 0 Tri Cities Airport, TN 84 57 76 46 / 70 60 20 0.
The air mass will continue to warm today underneath high pressure aloft. A building upper level ridge will keep skies mostly clear to partly cloudy with only high level clouds expected through Tuesday morning for widespread VFR conditions.
1030 AM EDT MON SEP 26 2016 A quasi-stationary front across southwestern NC will return north as a warm front today as a cold front approaches from the west.
The drier air was evident behind the boundary with dewpoints falling into the lower 50s and upper 40s across Eastern Iowa. Surface ridging will remain to the west of the region, with a continued west/northwest wind across Northern IL.
Sunny skies will prevail today with above normal temperatures as 70s will be common across all the lower elevation areas. An upper ridge will take hold of the northern Rockies through Tuesday. Highs on Tuesday will be in the lower to mid 80s. The forecast will be dry with the ridge in place.
Latest 26/00Z model and probabilistic data shows an upper level ridge developing as its main axis reaching poleward well into the western Dakotas. With quasi- stationary upper level low pressure systems well to the northeast and the southwest of the Panhandles, this should hold steady the ridge over the Panhandles and lock in tranquil conditions throughout the Panhandles for the majority of the week. This will advect some weak vorticity perturbations into the northern TX and OK Panhandles downstream of the small trough axis to our west in the mean 500 hPa flow.
Building high pressure will bring dry conditions with a warming trend through the first part of the week. Strong ridge of high pressure over the Great Basin this morning with upper level low over the Baja Peninsula. This trend will continue on Tuesday although moisture associated with upper level low begins to lift north into southern Utah. Upper level low lifts north during the middle of the week bringing a chance for showers and thunderstorms back to the area for the middle and latter portion of the week.
512 AM MDT MON SEP 26 2016 Early morning satellite imagery and RAP upper level analysis shows large scale ridging in place across the western US, with a trough over the northern Mississippi River Valley. NW flow aloft is primarily holding influence across the Central High Plains, with ridging beginning to build across the Central Rockies. At the surface 1027-1028 MB high pressure is in place over our CWA. Regarding Frost Advisory this morning: Tds have decreased into the low to mid 30s and temps have declined to near 40F (upper 30s at a few locations).
747 AM EDT MON SEP 26 2016 Morning water vapor satellite imagery is showing the upper level low near the Florida Panhandle is starting to dip southeast into the eastern Gulf today, while the Florida Peninsula remains under a fairly moist airmass. Weak high pressure will continue to hold north of the waters through the next several days, with light and generally east winds turning onshore each afternoon with the sea breeze.
Seasonably warm temperatures are expected today before an unsettled weather pattern develops as low pressure moves in from the south.
Strong high pressure over the region and offshore flow will once again result in extremely warm temperatures over the San Francisco Bay Area and Monterey Bay Region this afternoon. Modest cooling is forecast by Tuesday with a more significant cooling trend expected for the second half of the week as an upper level trough deepens along the West Coast. Most places will be 15 to 25 degrees cooler by Weds compared to this afternoon. ECMWF solution then brings a fairly cool trough down the west coast the second half of the week.
1035 AM CDT MON SEP 26 2016 At 10 AM cold front was analyzed just south of Del Rio to just north of San Antonio to near Georgetown. The cold front will continue south moving through the I-35 corridor through the remainder of the late morning and early afternoon and into the inland Coastal Plains and Brush Country later this afternoon.
Today will be much cooler because of the cold air advection. Went close to the GFS MOS highs which are in the lower 70s.
938 AM EDT Mon Sep 26 2016 High pressure will cross the region today with plenty of sunshine and near seasonal temperatures. High pressure will build across the region from Labrador by mid week. especially in the north 1/3 of the forecast area where the thickening clouds and a chilly east flow will limit highs to the lower 50s. High pressure will continue to build across the region early today and then move off the New england coast this afternoon. An upper low across the northern Great Lakes will drop slowly south through the period.
Water vapor clearly shows an upper low spinning over the area this morning. The combination of the upper low and approaching front will lead to the development of scattered showers and storms late this morning into the afternoon. Highs today will be slightly cooler due to the additional coverage of showers and storms.
821 AM PDT MON SEP 26 2016 A high pressure ridge axis will push east of the region today. with very warm high temperatures in the upper 80s to around 90 for the lower elevations with upper 70s/lower 80s mountains. High pressure ridge with VFR to prevail with SKC/SCT250 and light diurnal wind pattern.
The upper low that was centered over the Florida panhandle yesterday has shifted south into the northern Gulf. The low is expected to continue weakening as it drifts southeast through the day, though it should still provide some synoptic ascent locally. Depending on how long the low clouds across south-central Georgia stick around, a differential heating boundary may develop and be another forcing mechanism for storms later today.
Still not quite confident in high temps over southern IN where rains have dropped them into the lower 60s. A cold front will cross the region from west to east this morning, exiting our Blue Grass counties around lunchtime. Trailing the surface front will be the corresponding 5H trof axis and vorticity ribbon which will sweep out the last of the showers this afternoon. High pressure nosing in behind the departing front will bring dry and pleasant weather tonight and Tuesday. a little warmer in urban cores.
The cold front is pushing into middle Tennessee. with cooler drier air spilling in from the Northwest. even with the cooler and drier air moving in. /issued 654 AM CDT MON SEP 26 2016/ A large upper level low pressure system will continue to drop southeast into the Great Lakes today and into the Ohio and Tennessee Valleys by later in the week. This will push a cold front across the Mid South today with scattered showers and thunderstorms. Much cooler and drier air will push into the region behind the front for later today and tonight. Cooler and less humid weather will continue through the first part of the week with highs mainly in the 70s to lower 80s with lows mainly in the 50s.
The high will move southeast across western Kansas this morning then into western Oklahoma by evening with light northwest winds shifting to the light south and southwest. Lows tonight will be slightly warmer and mainly in the mid 40s.
1002 AM EDT MON SEP 26 2016 Cold front currently stretches from the central Great Lakes down through NW Alabama to the Louisiana coast. This frontal system should be south of our CWA by 06z-12z Wed as it ushers in a cooler and drier airmass for the extended. Still enough lift generated by perturbations in the overall upper trough to warrant continued low pops for the extreme southern tier. Front clears the entire area by Wed afternoon as East Coast upper trough continues to deepen.
1004 AM EDT Mon Sep 26 2016 A cold front will move east across the region today, bringing showers and a few thunderstorms. Drier and cooler weather will move in behind the front tonight and Tuesday. An upper level low pressure system is expected to move into the Great Lakes and Ohio Valley by mid week which will keep the weather cool due to clouds and the threat for showers. Cold front is located near the middle of the FA, with a gust front well ahead of the front near the eastern periphery of the area. A large scale mid level trough will close off as it slowly digs southward into the western Great Lakes tonight into Tuesday. Highs will range from the lower to mid 70s, which is typical for late September.
High probabilities for showers early this morning as cold front presses east through the state. Upper low and deep moisture are progged to gradually sink southward Tuesday afternoon and Tuesday night. Best coverage of showers, and possibly a few tstms, will be Tuesday night when the upper low is overhead and lake effect component is still present.
A strong early autumn upper ridge over the northeast Pacific and the Pacific Northwest will slowly move eastward today, but not before continuing to produce another nice day today with mild and dry weather over southwest Washington and northwest Oregon.
H5 trough has completed it split, with the main trough sweeping east across the Great Lakes, and the cutoff low dropping into NW Mexico. Cold front associated more with the northern trough continues to drop southward through central Texas. The front will likely hang up along the coast or morph more into a weak coastal trough.
A strong upper ridge will move across the area today giving a warm and sunny day. A weak cold front will bring a chance of light precipitation tonight and Tuesday morning to northern areas.
Rain chances will significantly decrease by mid afternoon as drier air moves in from north to south, and as the upper low over Baja California moves farther west.
734 AM EDT Mon Sep 26 2016 Showers and scattered thunderstorms can be expected with the passage of cold front today. A deepening trough over the Great Lakes will pull a cold front across the Upper Ohio Valley this afternoon. This will be where surface instability is likely to be the highest based on the boundary's timing, and less cloud cover. Temperature advection will be quickly neutralized on Tuesday, with warm advection resuming on the southeastern flank of Great Lakes low pressure. Most of this period will be dominated by the closed upper low.
607 AM CDT Mon Sep 26 2016 Water vapor imagery along with RAP 500mb analysis showing a deep trough extending south across MN/IA. deep low pressure around 999mb over southern Ontario with a cold front extending southward through western Lower MI into Indiana. Cooler air filtering into the region this morning on westerly winds with temperatures as of 3 am ranging from the upper 40s to the middle 50s. deep cyclonic flow with tight pressure gradient will reside over the region for cooler/blustery conditions. Otherwise, look for highs ranging from the middle 50s to the lower 60s. Deep cyclonic flow lingers over the region as the closed low moves farther southward into Indiana. another slightly cooler than normal day on tap with highs in the 60- 65 degree range.
/issued 249 AM CDT MON SEP 26 2016/ A large upper level low pressure system will continue to drop southeast into the Great Lakes today and into the Ohio and Tennessee Valleys by later in the week. This will push a cold front across the Mid South today with scattered showers and thunderstorms. Much cooler and drier air will push into the region behind the front for later today and tonight. Cooler and less humid weather will continue through the first part of the week with highs mainly in the 70s to lower 80s with lows mainly in the 50s.
1052 AM CDT MON SEP 26 2016 Cold front has moved just south/east of the cwa but band showers/ iso storms continues to hang back across northwest middle TN with trailing upper trough. Cold front has passed CKV and is nearing BNA at present, with front expected to reach CSV around midday.
Northwest flow aloft weakens today as the heights increase with the ridge moving closer. With the moderating airmass, minimum temperatures will be a few degrees warmer than those of Monday night.
Much of the medium and extended range looks to be settling in on quiet times, in proximity to upper-level ridge between closed low across the Great Lakes area and trough through the western U.
1036 AM CDT MON SEP 26 2016 High clouds trailing the cold front that has moved through the Midwest and the Ohio River Valley is quickly clearing out of the region as well. High pressure is building into the Midwest and the cooler and drier air is sinking into Central Illinois. This should dry things out nicely today with ridging building in. Conditions this afternoon will definitely feel fall-like as temperatures will only reach into the lower to middle 70s and combine with the breezy winds out of the northwest. An upper level low from the western Great Lakes will bring cooler air into the Midwest through the end of the week. However, the medium range models disagree as to the position of this low and how long it may linger in the region.
Some isolated thunderstorms will also be possible through the remainder of today with a cold front continuing to advance east across the region. /issued 422 AM CDT MON SEP 26 2016/ Cold front entered our northwest CWA early this morning and is now just south of I-30 with a few showers developing invof the front during the past hour. Due to the lack of deep layer moisture and limited upper level support, have maintained lower pops despite the presence of this front which should continue to slow its forward progress as it encounters some resistence due to weak ridging still present to the east.