Aikyam-Lab/Synoptic-Bench huggingface dataset:
Cold front/wind shift line is just entering the northwestern forecast area this afternoon. The Devils Lake basin remained under thicker cloud cover for most of the day, and with the arrival of a northerly wind shift, temperatures have remained a bit cooler out that way. Canadian high pressure will build southward into the area on Tuesday ushering in much colder air relative to Monday. Cool, northerly flow will keep temperatures below the freezing mark once again, except for maybe the far south along the South Dakota border. The forecast for this period starts off with cold high pressure sliding southeast from southern MB into the Great Lakes region.
823 PM EDT Mon Mar 20 2017 Some showers will cross the region tonight in advance of a weak cold front. Much of the region will be dry Tuesday with the exception of the ridges in the morning as low level moisture may be slow to exit the area. Have only slight chance to low chance precip to the far south with this feature as the favorable location within the base of the trough passes south of the CWA.
/issued 340 PM CDT Mon Mar 20 2017/ (Tonight and Tuesday) Temperatures this afternoon are mainly in the 80s, with some locations approaching the lower 90s by late this afternoon.
Have increased clouds somewhat which should keep temps a little warmer than previous package overnight. 19z/2pm surface analysis shows cold front just east of the I-55 corridor. Despite Canadian high pressure building into the Midwest on Tuesday. Frontogenetic forcing will be strongest across the central and northern KILX CWA, so have therefore focused the highest PoPs across this area during the afternoon. High temperatures will be held down to the clouds and scattered showers, with readings mainly in the lower to middle 50s.
Chattanooga Airport, TN 55 77 54 64 / 10 60 70 30 Knoxville McGhee Tyson Airport, TN 49 72 48 58 / 30 70 80 20 Oak Ridge, TN 52 72 49 61 / 40 60 80 20 Tri Cities Airport, TN 49 68 45 57 / 50 50 70 20.
/issued 929 PM CDT Mon Mar 20 2017/ Showers continue to develop across West Tennessee ahead of an approaching cold front. a bit windy, but otherwise nice featuring mostly clear skies and highs in the low to middle 80s. A warm front in oriented just East of the Mississippi River and will shift off to the Northeast this evening. Dew points behind the front are in the low to middle 60s setting the stage for a round of thunderstorms tomorrow. Afternoon instability ahead of a cold front will approach 1500 J/KG across West TN and the Missouri Bootheel. Northwest Flow will be in place as a ridge strengthens over the Plains.
Latest GFS lamp guidance showing overnight low temps a few degrees warmer than afternoon forecasted values, and these seem reasonable with current temp trends, and thus adjusted low temps up accordingly.
830 PM EDT Mon Mar 20 2017 Cold front with showers and thunderstorms crossing the area.
1147 PM CDT Mon Mar 20 2017 At H5 closed low over the northeast Pacific with a ridge into Juneau. Trough from north central Canada into the Dakotas flattening the ridge over the lower 48 and then a closed low off the Atlantic Coast.
High pressure will drop down from Canada tonight bringing dry and cool conditions to northeast SD and west central MN. This upper level energy will bring light snow to areas south of Mobridge with up to an inch possible from Pierre south.
746 PM EDT Mon Mar 20 2017 A weak cold front will move southeast through the region this evening bringing widespread precipitation to the area. It will be followed by an arctic cold front late Tuesday into Tuesday night.
With uncertainty so low at this time, not really wanting to oversell any potential impacts given potentially marginal surface temperatures, but there is the potential for p-type concerns (freezing rain, snow, and rain) along the northern tier of counties (Hi-Line north). Cassell /ISSUED 535 PM MDT Mon Mar 20 2017/ Rain and snow showers over the central and southwestern Montana counties will diminish tonight through early Tuesday morning as upper ridging builds overhead and the mid-level frontal energy splits apart.
Rain and snow showers over the central and southwestern Montana counties will diminish tonight through early Tuesday morning as upper ridging builds overhead and the mid-level frontal energy splits apart.
1051 PM EDT Mon Mar 20 2017 A weak cold front will move across early Tuesday morning, followed by a stronger cold front Tuesday night.
553 PM MDT Mon Mar 20 2017 20z surface analysis had frontal boundary from central WY into southwest NE with ridge across the Dakotas into the Midwest. Thermal ridge will nose over the low level cold air.
With dewpoints just a few degrees cooler in the mid to upper 50s, late night low clouds and fog may become slightly less of an issue, and mainly confined to KLFK, KMLU and possibly KSHV and KELD, as flow above sfc becmg more from sw, leaving nw portions of cwa mostly skc overnight.
1159 PM EDT Mon Mar 20 2017 A weak cold front will move southeast through the region this evening bringing widespread precipitation to the area. It will be followed by an arctic cold front late Tuesday into Tuesday night.
Thunderstorms developing after 22z/Tues along a cold front which will move through region by 06z/Wed.
1042 PM EDT Mon Mar 20 2017 Cold front with showers and thunderstorms crossing the area.
A strong high pressure system to the North will be pushing off to the East which is creating a decent cap over the region. This high pressure will also allow for some CAA that will bring temperatures down as well.
You know you've rounded the corner of seasonal change when a cold front brings north winds and a nice day behind it. Some of the extratropical cyclones that develop across the CONUS will have the potential to be strong.
626 PM CDT Mon Mar 20 2017 A cold front will slowly make its way southwest across the region tonight. Outside of the lower clouds, skies should remain VFR. /Issued 350 PM CDT Mon Mar 20 2017/ Another very warm day across the Panhandles region today as our area is sitting under a ridge of high pressure.
833 PM EDT Mon Mar 20 2017 A weakening cold front will pass through the region overnight. A stronger cold front will move through Tuesday night bringing sharply colder air for mid week. The southern convection seems to be associated with a weak wave that is forming on the tail end of the cold front. Models takes this weak low eastward and south of PA, with the unfavorable low level shear north of the system causing the cold front to basically fall apart as it enters the region. The HRRR brings some showers into the CWA, mainly between about 10PM and 4AM, keeping the areal coverage limited and the QPF on the low side. High pressure will begin to build in for Tuesday.
612 PM CDT Mon Mar 20 2017 Latest surface analysis had the cold front south of the forecast area, extending from central Illinois to south central Kansas at 19Z. Models show an area of frontogenetic forcing developing north of of the Highway 36 corridor northward into Iowa. Lows tonight will range from near 40 along the Iowa border to the lower 50s south. Highs on Tuesday will be cooler than today with readings in the 50s amid clouds and northeast winds.
624 PM CDT Mon Mar 20 2017 19z/2pm surface analysis shows cold front just east of the I-55 corridor. Despite Canadian high pressure building into the Midwest on Tuesday. Frontogenetic forcing will be strongest across the central and northern KILX CWA, so have therefore focused the highest PoPs across this area during the afternoon. High temperatures will be held down to the clouds and scattered showers, with readings mainly in the lower to middle 50s.
These northerly winds and cooler temperatures will continue to push southward tonight. Cold front/wind shift line is just entering the northwestern forecast area this afternoon. The Devils Lake basin remained under thicker cloud cover for most of the day, and with the arrival of a northerly wind shift, temperatures have remained a bit cooler out that way. Canadian high pressure will build southward into the area on Tuesday ushering in much colder air relative to Monday. Cool, northerly flow will keep temperatures below the freezing mark once again, except for maybe the far south along the South Dakota border. The forecast for this period starts off with cold high pressure sliding southeast from southern MB into the Great Lakes region.
Chattanooga Airport, TN 55 77 54 64 / 20 60 70 30 Knoxville McGhee Tyson Airport, TN 49 72 48 58 / 30 70 80 20 Oak Ridge, TN 52 72 49 61 / 40 60 80 20 Tri Cities Airport, TN 49 68 45 57 / 50 50 70 20.
946 PM EDT Mon Mar 20 2017 A weak cold front will move southeast through the region this evening bringing widespread precipitation to the area. It will be followed by an arctic cold front late Tuesday into Tuesday night.
932 PM EDT Mon Mar 20 2017 High pressure will prevail across the area tonight into Tuesday.
1031 PM EDT Mon Mar 20 2017 A weakening cold front will pass through the region overnight. A stronger cold front will move through Tuesday night bringing sharply colder air for mid week. To the north rain showers are becoming a little better organized over Ontario and the lower Gr Lakes. The HRRR still brings a slug of rain into the region mainly between about 11PM and 4AM, keeping the areal coverage limited and the QPF on the low side. High pressure will begin to build in for Tuesday.
/issued 245 PM CDT Mon Mar 20 2017/ Current visible satellite imagery is showing cumulus developing in the higher elevations from the Guadalupe to the Davis Mountains this afternoon.
929 PM CDT Mon Mar 20 2017 Showers continue to develop across West Tennessee ahead of an approaching cold front. a bit windy, but otherwise nice featuring mostly clear skies and highs in the low to middle 80s. A warm front in oriented just East of the Mississippi River and will shift off to the Northeast this evening. Dew points behind the front are in the low to middle 60s setting the stage for a round of thunderstorms tomorrow. Afternoon instability ahead of a cold front will approach 1500 J/KG across West TN and the Missouri Bootheel. Northwest Flow will be in place as a ridge strengthens over the Plains.
Temps on Wednesday will likely remain at or slightly below freezing.
349 PM CST Tue Jan 3 2017 (Tonight and Wednesday) Cold front has made it through all of West Central Texas this afternoon, although the best cold advection is still lagging behind the front.
1202 PM CST Tue Jan 3 2017 VFR conditions with only cirrus clouds this am across areal terminals, to be quickly replaced this aftn as a solid low MVFR deck accompanies leading edge of cold front movg into se OK and portions of ne TX, just nw of I-30 corridor attm. Today warm temperature across the ARK-LA-TEX due to compressional warming ahead of a cold front.
Highs in the lower to middle 20s is common amongst the guidance and given the increasing cloud cover and weaker winds, this would seem to make sense. By Wednesday night, models show a positively-tilted mid-level trough over the Northern Plains sliding south/southeast into the Central Plains.
Current visibilities are ranging from 1-3 miles over eastern portions of central ND to 3-7 miles along and east of the Highway 83 corridor. Could have gone even lower but within our northwest flow, there is a trough that drops south through southern Canada tonight with perhaps a bit of mid level cloudiness to inhibit our temperature drop.
Cold front located near a GNC. S of LES/BPG with parent anticyclone off to the ne and moving se, which is farther s and w than previous forecast. A backdoor cold front will move through area terminals this evening, accompanied by an easterly/northeasterly wind shift that will reach MAF by around 02Z, and CNM and FST by around 09Z.
Clouds will stick around the area and winds will eventually swing around to the W/NW as a trough passes through.
Scattered showers associated with a LLJ flowing over the coastal warm front have now exited our southeastern counties. At the surface a weak trough is moving into the area with no real air mass change behind it, as the main cold front remains back over Oklahoma and Missouri. The cold front will move into the forecast area tonight. 32/Davis A longwave trough will become established over the eastern CONUS for much of the Day 2-7 period. This process will begin on Wednesday as a deepening 500mb trough moves through the Great Lakes. This will cause a cold front to move through our area with cooler and drier conditions.
Low pressure off the Oregon coastline will send a strong push of moisture over the area by the late afternoon hours. An upper trough over the Pacific Northwest will continue to elongate westward well off the Oregon coast. A more significant precipitation event is on tap for late tonight and Wednesday as warm front lifts into southeast Oregon and far southwest Idaho. Greatest QPF/snow amounts will fall across southern Harney and Malheur counties eastward into the higher terrain of southwest Idaho south of the Snake Plain through Wednesday evening. For this event the West-Central mountains will see the lowest snowfall totals in the forecast area.
305 PM EST Tue Jan 3 2017 Rain showers will continue tonight until the passage of a cold front. Widespread precipitation will continue to shift northeastward this evening as the low departs, with rain showers expected to continue until the passage of a cold front overnight. Will maintain the chance PoPs for upslope and lake enhanced snow showers in the typical locales, but with limited moisture within the dendritic growth layer, and building subsidence by the afternoon, efficient snowfall production will be limited, especially in the high terrain.
Arctic high pressure remains over the Northern High Plains late in the week, then shifts east for the weekend.
As the front continues to push to our south tomorrow, some cooler and drier air will filter in behind it allowing skies to gradually clear from north to south tomorrow.
/issued 355 AM CST Tue Jan 3 2017/ First in a series of cold fronts passing through the region as advertised.
331 PM EST Tue Jan 3 2017 Low pressure over northeast Ohio will move to near Buffalo by late this evening. A strong cold front will sweep across the area tonight. Arctic high pressure will then build across the Plains states and Midwest the second half of the week. The eastern system over PA is quickly exiting the area with its rain shield while a rapidly advancing cold front with associated jet is producing a quickly expanding area of convection over IL/IN with isolated thunder. Temperatures will fall below freezing by morning. Cold advection will overspread the region in the wake of the cold front on Wednesday and continue through much of the period.
225 PM EST Tue Jan 3 2017 Cold front passes this evening and tonight with more showers. Cold air arrives Wednesday and remains into the weekend under high pressure. Cold front approaching from the west, now pushing into southeastern Ohio, knocking on the CWA doorstop/Perry County. Also will have a brief change over to snow showers as the low level moisture erodes from west to east. As in typical fashion, expect this to be only superficial amounts, only in the highest elevations. A cold front should be along the Appalachians by 06Z Wednesday.
An arctic cold front has pushed southeast of the Wabash river by mid afternoon with brisk nw winds 15-25 mph dropping temperatures. Lows in the lower 20s from I-70 southeast where wind chills reach 7-12F. 1038 mb arctic high pressure over MT ridges into the MO valley on Wed and should provide a mostly sunny but cold day to central IL. 850 mb temps down to minus 10-14C on Wed gives cold highs in the lower 20s northern CWA and upper 20s in southeast IL.
247 PM CST Tue Jan 3 2017 Colder weather is on the way! A cold front is currently nosing SE through the Permian Basin this afternoon. The front will continue to slowly push SW, stalling near the higher terrain regions late tonight. With the cooler airmass in place, overnight lows will drop into the upper 20s to low 30s across much of Southeast NM and Permian Basin. Wednesday, southerly winds return briefly, allowing the cold front to lift to the north.
306 PM CST Tue Jan 3 2017 The cold front poised to bring colder temperatures and low chances for winter weather back to the region was approaching the Ohio River.
LIFR/IFR cigs/vsbys will improve across far ERN OK and NW AR sites to MVFR by mid evening as a strong cold front continues to move through the region. Temperatures behind cold front will continue to remain steady or fall.
Temperatures behind cold front will continue to remain steady or fall.
As of mid afternoon, surface analysis showed an area of low pressure near Cleveland, Ohio with a cold front marching through central Indiana southwest into Missouri. For Wednesday we'll be under steady cold air advection and plan on highs to be some 20 to 25 degrees colder compared to today - mainly in the low to mid 30s. Northwest to west winds 15 to 20 mph at times will make it feel more like the low to mid 20s throughout the day.
North/Northwest winds continue across the area ahead of the next cold front which is now beginning to knock on the door of the CWA at the present time. This front is in response to an eastward push within the main upper trough currently in place across the northern CONUS. North winds tonight will be in the 10 to 15 MPH range on average with lows dropping into the 30s and 40s across the area with the lower temperatures closer to the Hill Country.
136 PM CST Tue Jan 3 2017 Precipitation continues to shift east and northeast of the forecast area this morning for the most part, but given lingering patches of freezing drizzle and slick spots on a few area roadways, will leave the winter weather advisory going until it's scheduled 6 a. We will be stuck in the low clouds and fog for awhile, but the next new concern will be related to the increasing northwest winds. As the mid/upper trough dips across the Great Lakes tonight and scrapes the eastern portion of the forecast, we could see scattered flurries over west central Wisconsin.
A cold front has pushed east of I-57 by late morning and will sweep through far eastern/southeast IL through midday. Brisk nw winds behind the cold front will increase to 15 to 20 mph and gusts in the 20s in eastern IL as well in next few hours. Highs have already been reached this morning, ranging from mid to upper 30s over the IL river valley, to the lowers 50s southeast of I-70. A strong cold front will be pushing through the area today, followed by much cooler and drier air.
A warm front will lift northward across the state tonight. A cold upper level trough will then swing south across the region during the latter half of the week.
1018 AM CST Tue Jan 3 2017 A cold front continues to push south across North Texas towards the region this morning, with the front expected to reach College Station between 3-5 PM CST and the Houston metro between 6-8 PM CST. courtesy of the W/SW flow ahead of the cold front later this afternoon. Not expecting a lot with this FROPA in terms of precipitation but the Canadian air mass in the wake of this front will bring cooler temps tonight and tomorrow/Weds. As the associated low pressure system moves further to the ENE. Cold front pushes off the coast tonight and northerly flow ramps up and reaches SCEC 6-10hrs and probably SCA at least for a few hours.
The cold front will continue to move slowly to the south and east of our area overnight with a secondary and dry cold front pushing through on Wednesday. The surface cold front is clearly marked by a line of showers just ahead of it, which extended SWWD from Fitzgerald, GA to near Mexico Beach, FL at 14z.
Some fog also remains behind the precipitation within the baggy pressure gradient associated with the inverted trough. 09Z surface obs indicate improving conditions farther west into MN/IA and do expect improving visibilities through sunrise as the inverted trough moves east. The upper trough currently over the northern plains will rotate through the region tonight with low-level cold air continuing to funnel southward into the region. Could see a few flurries with the passage of the upper trough, but the main story tonight will be the cold temps. Broad troughing over the eastern CONUS will set up amplified dry NW flow into the Upper Midwest during this time. Models have indicated a band of light snow along the mid-level baroclinic zone Wed night as an upper trough swings southeastward, but currently this snow is forecast to remain just south of our area.
229 PM EST Tue Jan 3 2017 Cold front passes this evening/tonight with more showers.
The cooler air remains to our north today behind a dry cold front so today's high temperatures are expected to climb into the low to mid 70s. Tonight, an upper system digging south over the the northern PLains/Mississippi River Valley will push a dry cold front across the region tonight, bringing drier and cooler northerly flow. Temperatures will still remain above seasonal levels, though, with overnight lows in the low to mid 50s expected.
1052 AM CST Tue Jan 3 2017 Low clouds, fog and patchy drizzle prevail across the Mid-South in advance of an approaching cold front. Cold high pressure will begin to build into the region this evening, with winds picking up and becoming more northwesterly after sunset, as overnight lows will generally be in the 30s and 40s. High pressure will keep conditions dry on Wednesday, when the sun could make a rare appearance for many locales as clouds clear.
115 PM EST Tue Jan 3 2017 Low pressure over the Ohio Valley will move eastward and cause another low to form near the Delmarva today. A cold front will cross the area on Wednesday.
Not too much recovery expected tomorrow with the CWA remaining below freezing.
326 PM CST Tue Jan 3 2017 The Arctic cold front has made its way through the area today, having pushed well south of the area into Texas.
104 PM EST Tue Jan 3 2017 Low pressure will track northeast through Ohio today. Drier and much colder conditions will arrive on Wednesday as high pressure builds west of the region.
155 PM EST Tue Jan 3 2017 Scattered showers will continue this evening ahead of a cold front which is now just nw of Hazelhurst, Ga. Cold front will push south of the area by early Wednesday morning with a secondary cold front to push through Wednesday afternoon.
Otherwise just a very cold day in store with Arctic high pressure sitting over eastern Montana.
Our cold front from Today will return northward across the area as a lee side low drops into eastern New Mexico. The question is just how far north the warm front will make it and how much WAA will occur across the SW. Have brought temperatures up but have leaned on the cooler side given cloud cover. The warmer temperatures on Wednesday will quickly be removed from the area as a cold front surges southward. The cold front is expected to be knocking on our door to the north shortly after sunset and be south of the area by daybreak.
Arctic airmass was in place across much of the Western Plains with midday temperatures still in the lower to mid 20s on a north wind 15 to 20 mph.
236 PM EST Tue Jan 3 2017 Skies are partly to mostly sunny with temperatures averaging in the lower to mid 80s and uncomfortable dewpoint readings in the mid 70s. Surface wise, a low pressure system is located in the Ohio valley with an associated cold front draped southward into the west central Gulf of Mexico. Closer to home, a western Atlantic ridge axis extends through the southern half of the Sunshine State. With the close proximity of the ridge, winds are light and variable at less than 10 knots across our entire marine district.
432 PM EST Tue Jan 3 2017 A cold front moves across the area later tonight and will bring much colder air in from the west.
A cold front, currently moving into EWX's northern CWA, is forecast to move through S TX this evening and is expected to be moving south of the area around midnight. MX temps for Wed will likely be around 15-20 degrees cooler than today's warm values. As a cold front moves across the region tonight, offshore winds are expected to become moderate overnight.