Aikyam-Lab/Synoptic-Bench huggingface dataset:
222 AM MST Wed Nov 15 2017 09z surface analysis had low pressure over northern MN with main cold front into western OK and secondary trough into northwest SD. Band of ST just behind the trough will affect far northwest SD this morning. Water vapour had upper trough east of the CWA with upper ridge building over the Rockies toward the CWA. Thursday, upper ridge moves into the northern Plains with thermal ridge peaking over the CWA.
A cold front continues to march east across the area this morning and as of 3 AM was positioned near the Interstate 35 corridor. A brief period of dense fog is possible as this low moves through. Most areas should be in the low to mid 30s by late this afternoon.
334 AM CST Wed Nov 15 2017 Upper ridge centered over Baja with axis extending north into Canada as an upper trough off the NW Coast slowly moves ashore today and Thursday. This ridge will build over Central Mexico and remain there so not expecting any big changes in the pattern. This trough will eventually pass across the plains and push a front through the area.
Luckily, a strong upper level trough with jet stream support and an attendant surface cold front will be coming through the region overnight tonight and Wednesday morning. Temperatures behind the cold front will be near normal for this time of year. The end of the week looks have sunny skies for the most part as high pressure slowly moves to the east. Temperatures will remain near normal for Thursday but as the high pressure system moves off to the east Thursday night, winds will shift around to the south and the pressure gradient will tighten up considerably.
This moisture rides out ahead of the next Pacific cold front that slides over Eastern Oregon late tonight and into the Idaho zones Thursday morning. Winds out ahead of the approaching cold front are already increasing across portions of Malhuer county with several remote stations reporting 15 to 20 mph with gusts in the 25-30 mph range.
Trough still on schedule to develop light rain over the eastern cwa overnight with some drizzle o the west as it/surface front moves through. Not clear how much the lower clouds will erode, especially to the east into Wednesday.
models depict a series of very weak cold front boundaries moving through the area during the short term. Expect highs mainly in the upper 70s to the lower 80s each afternoon.
1223 AM EST Wed Nov 15 2017 Cold front crosses late Wednesday. High pressure crosses Thursday night.
As isentropic ascent increases in the warm sector ahead of the approaching cold front, we expect the development of isolated to scattered showers. A cold front will move south into the CWA during the afternoon, clearing the southeast counties tomorrow night. A cold front will be approaching later tonight with a few showers possible over NE AR and the MO Bootheel toward sunrise.
336 AM EST Wed Nov 15 2017 High pressure should maintain dry weather through part of today. Rain is expected to return with a late in the day and this evening with a cold front. The wave and and associated cold front are progged to cross the Great Lakes and Upper Ohio Valley area late this afternoon and evening, returning showers to the area. After the initial wave and cold front exit, an upper trough is progged to approach the area late tonight, maintaining rain and possible snow shower chances. The upper trough is expected to cross the Lower Great Lakes/Upper OH Valley regions Thursday. Maintained rain and snow shower chances, with the highest POPs confined N of I 80 where some limited lake enhancement is possible.
157 AM EST Wed Nov 15 2017 High pressure will move overhead tonight. A cold front will move through Wednesday night and then another will move through over the weekend with high pressure in between the two. Lowering inversion heights finally eroding the low cloud deck which plagued central PA all day. The west will see the high clouds thickening and lowering. Ridge of high pressure slides through Thu night through Fri.
Not expecting the dense fog to return as the south flow has increased ahead of the approaching cold front and as a result, the dense fog advisory was canceled. Messy forecast for this evening, but luckily temperatures are all above freezing so any precipitation should remain liquid. Approaching mid level trough continues to hold area in warm air advection regime, with hints of a warm front laid up across northeast Iowa as of 19z. Quiet weather settles in for a bit mid week, with ridge passage Wednesday night.
As the wind turns to the southwest and especially west the low stratus is eroding and temperatures warming. As this high pressure shifts east, a very strong southerly gradient will develop with south winds of 25 to 35 mph and gusts around 40 mph likely.
A cold front will bring rain to central Indiana today.
The low ceilings and visibilities should improve relatively quickly behind this frontal boundary, as clear skies are already noted in central Kansas. Some high clouds may advect into the area early tomorrow morning, and lows tonight are much cooler than previous nights near freezing. Thursday, A positive tilt upper level trough will move onshore across the pacific northwest as a low amplitude downstream upper level ridge moves east across the plains.
351 AM EST Wed Nov 15 2017 High pressure and dry air will remain in control of the region through Wednesday.
258 AM MST Wed Nov 15 2017 The persistence that has prevailed over the forecast area the past couple of days has changed as a cold front pushed through the northern plains earlier this evening. As a result, today's highs will be cooler and drier than yesterday leaving us in the 50s across our CWA.
1018 PM MST Tue Nov 14 2017 Surface cold front currently moving through northeast CO will be dropping south of the Palmer Divide late this afternoon, and through all of the southeast plains by 03z. With the arrival of the cold front, will see a wind shift from the northwest to north in the 15-25 mph range before winds decrease overnight. Cooler temperatures are in store for Wednesday along with lighter winds, especially for the southeast plains where values should max out near to slightly below climo. West winds will still be gusty across the higher elevations of the mountains in the afternoon with speeds around 15-30 mph.
Mild conditions will occur Wednesday and Thursday as highs warm into the middle 50s to the lower 60s.
/issued 528 PM CST Tue Nov 14 2017/ Light southeast winds to prevail overnight ahead of an approaching cold front that will move across the region on Wednesday evening. /issued Issued by National Weather Service JACKSON MS/ A warmer than normal night is expected throughout the ArkLaTex as warm moist air continues to be advected into the region from the south. Lows tonight will range from the upper 50s in to the lower 50s in north-central Louisiana.
305 AM CST Wed Nov 15 2017 Scattered rain showers and isolated thunderstorms ahead of a cold front will continue to push east and outside of the CWA early Wednesday as the boundary makes a steady push southeastward.
358 AM CST Wed Nov 15 2017 Scattered showers and isolated thunderstorms will continue this morning as a cold front moves south across the area. The frontal boundary will stall just to our south tonight before beginning to lift north as a warm front Thursday.
At the surface, low pressure was located over central SDak and another was in southeast CO. A cold front extended WSW of the SDak low and was just entering NW Neb early this afternoon. Not much of a temp contrast ahead or behind the front, but a definite moisture difference with surface dewpoints in the lower 50s over eastern/central Neb, but only in the mid 20s in far NW Neb. Question for tonight is when will the cold front pass through the CWA, and clear out the low clouds and fog as it does so? Am concerned fog may reform this evening, especially in the southeast part of the CWA.
Stratocu expected to move into the area from the west this evening ahead of the cold front.
1216 AM EST Wed Nov 15 2017 High pressure should maintain dry weather through part of today. Rain chances return with a late in the day with a cold front. High pressure should maintain mainly clear skies tonight. Wednesday will begin dry with seasonable temperatures, but the next upper trough/cold front combo will approach during the afternoon and cross during the evening hours. Northwest flow showers will linger behind the front through Thursday, ending by Thursday evening with the passage of the 850 mb thermal trough. With the bulk of the moisture below the dendritic growth layer and with surface temperatures remaining above freezing for the most part, very little accumulation is expected at this time.
with areas of showers moving into parts of northeast OK and northwest AR late tonight ahead of a cold front. Expect improving conditions as the cold front moves through from late morning into the afternoon.
Rain showers are expected ahead of the associated surface cold front over northeast Illinois during the overnight hours. Steady warm air advection will keep temperatures mild overnight with lows in the lower 40s. Wednesday night temps will fall below freezing once again with lows in the upper 20s to around 30.
With the lingering cloud cover and CAA, expect temperatures to end up a bit cooler than previously anticipated especially across the north/northeast. Stronger winds in the lower levels behind the front today, with BUFKIT showing 25-30kts at the top of the mixed layer through the day.
329 AM CST Wed Nov 15 2017 Surface cold front at 3 am was bisecting Iowa, running from a weak low pressure center near Minneapolis through central IA into far northwest MO.
A cold front will arrive 12-18Z shifting winds from the northeast and becoming gusty for a few hours. Otherwise, WV imagery shows an upper ridge in place over Baja del Sur, leaving the area under dry, NW flow aloft. Unfortunately, a cold front moving thru the Central Plains will move thru the region Wednesday, w/fropa at KMAF around 11Z, courtesy of a fast-moving trough dropping out of Canada into the Great Lakes area. Thu night, an upper trough will make landfall in the PacNW, and quickly move to the central CONUS by 12Z Sat.
1139 PM EST Tue Nov 14 2017 High pressure will move overhead tonight. A cold front will move through Wednesday night and then another will move through over the weekend with high pressure in between the two. Lowering inversion heights finally eroding the low cloud deck which plagued central PA all day. The west will see the high clouds thickening and lowering. Ridge of high pressure slides through Thu night through Fri.
A progressive upper trough currently moving into Minnesota and the mid Missouri Valley will move into the Great Lakes and Ohio Valley. A cooler airmass with h85 temps holding near 0C at O'Neill while warming to 5C n the far western zones. Went slightly cooler than previous forecast across the northeast, where highs from 45 to 48 forecast. For tonight, increasing mid and high clouds increase along the cusp of the upper ridge axis, especially north central. Better mixing across Sheridan and Cherry county to keep temperatures there in the lower to mid 30s most of the night.
143 AM EST Wed Nov 15 2017 Cold front crosses late Wednesday. High pressure crosses Thursday night.
903 PM PST Tue Nov 14 2017 High pressure will keep inland high temperatures above normal tomorrow with some slight cooling for Thursday.
but by late afternoon dry and cooler air will advect in behind the front. With high pressure building in Wednesday night, dry weather is expected through Thursday and Thursday night. Temps will remain on the cool side Thur as well but quickly get warmer for Fri and into the weekend as strong waa will occur ahead of the next weather system. There is still some differences once the low pressure tracks across the midwest/Great Lakes region, which causes the GFS to be 6hrs quicker with the cold front.
457 AM EST Wed Nov 15 2017 A mean layered ridge centered near the Baja Peninsula continues to send perturbations in the northwest flow across the Continental United States. Temperatures are in the lower 70s and dewpoints have crept into the upper 60s.
Low level moisture has been in place ahead of the trough for several days now with an elevated mixed layer around 750 mb above this low level moisture. Models are in agreement in briefly clearing the low level moisture out of the area Wednesday night and Thursday before it returning Thursday night.
923 PM MST Tue Nov 14 2017 Tonight's cold front is in several pieces, but the strongest winds are now over northeastern Colorado and this surge should be moving past our area by midnight. Only minor adjustments needed for a bit stronger winds on the plains this evening and also over the mountain ridges, and a little colder lows in the mountains. A cold front is moving south through northeastern Wyoming this afternoon, and is on schedule to push across the plains late this evening. Temperatures will turn colder behind the front, with cooler readings persisting through Wednesday. While high temperatures will be about 15 degrees cooler than today, they'll be near normal for this time of year.
256 AM MST Wed Nov 15 2017 High pressure remains in control today though upper level winds will become more southwesterly as opposed to zonal (or westerly) like they have been over the last few days. Thursday, a deep trough will finally start digging down the west coast as a strong jet approaches the area.
449 AM EST Wed Nov 15 2017 High pressure centered over the region will move away from the area today as a weak cold front approaches from the west.
412 AM EST Wed Nov 15 2017 A cold front will bring widespread showers today with highs generally in the mid to upper 40s. This will be followed by cooler and mainly cloudy conditions into Thursday.
A cold front will shift winds to the northwest then north mid morning at KABI and across the rest the terminals late morning and early afternoon.
342 AM CST Wed Nov 15 2017 High pressure continues to build into the area with generally clear skies expected today. Model differences continue with the strength and timing of the next cold front into the area.
These clouds will begin to dissipate after sunrise, and cool and quiet conditions can be expected today as high pressure remains in place at the surface. A weak cold front will approach the state by this evening into the overnight hours. While highs today will range from the upper 50s to lower 60s, highs on Thursday will reach the lower 60s in north Georgia and lower 70s in central Georgia.
The highs for today will mostly occur by late morning, with cold air advection in the wake of the cold front pushing temps down in the afternoon, especially northwest of Madison. We'll be in the pressure gradient between the departing trough and the approaching high from the northwest. Forecast confidence is high: High pressure will bring sunshine back to southern Wisconsin on Thursday. Temps will be back down to below normal with a cooler airmass in the wake of the departed low pressure system. Breezy winds in the morning will ease for the afternoon with the high moving overhead.
Flying conditions will improve to VFR along the coast and Lower Valley by mid morning Wednesday while it may take a few hours longer for the mid Valley (KMFE) to break out of the lower clouds. Aviation conditions improve to VFR along the coast and Lower Valley by mid morning Wednesday while it may take a few hours longer for the mid Valley (KMFE)to break out of the lower clouds. /issued 252 PM CST Tue Nov 14 2017/ SHORT TERM (Tonight through Wednesday Night): Short Term (Now through Wednesday Night): 500 mb ridging will remain in place over the U.
However, a cold front will shift winds to the northwest and quickly return conditions to VFR starting around GAG and WWR and reaching central OK late Wednesday morning.
This morning will be a cool start particularly in the valleys under mostly clear skies and weak upper level ridging.
Cooler in the wake of the cold frontal passage with 700 mb temperatures near 1 Celsius yielding high temperatures in the upper 40s to mid 50s. Warmer and windy as height and thicknesses continue to rise.
A pre-frontal trough crossed the forecast area this afternoon, clearing out the stratus. Therefore, kept tonight's lows on the high end of guidance despite clear skies and strong CAA. Made little change to highs in the lower 50s, which coincides with the cooler end of guidance (ECS). However, return flow late in the day may help push temps warmer than forecast in the panhandle.
400 AM CST Wed Nov 15 2017 Broad ridging within zonal flow will help bring the sun out with seasonably warm temperatures. Highs should be in the lower to mid 50s, despite the cold front passage from last night.
A southeastward moving cold front will move into MO tonight. Instability in the models appeared very limited until the cold front moves close to our region.
An upper trough also extended from from south central Canada into the northern Rockies. The low clouds and patchy drizzle and fog will be moving out of the area later tonight as the cold front moves through the region and the upper trough amplifies as it moves across the central plains. Warmer air will continue to overspread the region from the west Wednesday night and Thursday in advance of another strong upper trough approaching the west coast.
Currently, a cold front has pushed appx half-way through the state turning winds behind it around to the northwest. Tonight: the cold front will finish working out of the eastern forecast zones this evening. The low stratus may also end up moving east and departing the eastern forecast zones overnight. The period begins with an area of high pressure sliding SSE across eastern SD and western MN. By 12Z Thursday, the center of the high pressure should be located over central Iowa with WAA developing over much of this CWA. The WAA will spread across the region with highs on Thursday reaching the lower 40s in western MN, to the 60s, west of the Missouri Valley.
A closed upper low sits east of Nova Scotia with troughing extending south along the western Atlantic through the Bahamas. Weak ridging extends along the east coast northward to the New England region. By Thursday this ridge moves over Nova Scotia. On the surface, the interaction between the remnants of a frontal boundary over eastern Cuba and high pressure ridging over the eastern U. This will keep gusty north to northeast winds over the region and minimal rain chances over the next couple of days, with the highest chance of rain over the inland counties, but still only a 10-20 percent chance of showers.
/Issued 235 PM CST Tue Nov 14 2017/ A cold front will push through the Panhandles overnight. Fast zonal flow aloft will encourage another lee-side trough to develop on Thursday and the downslope winds will help to push highs above normal again.
The abundance of sun today over much of the area combined with the fresh snow cover has led to some melting as temperatures hover around freezing. All of this should result in widespread freezing fog from late evening into tomorrow morning, which will likely be dense in some locations. A broad trough will be in place out west with low amplitude ridging out east. A disturbance will pass across the southwest mid week, and given the low amplitude pattern it's tough to say at this range where it will track.
High pressure building through the Northern Plains will build in quickly behind this front, controlling our weather with dry conditions and a seasonably mild airmass to start the weekend. High pressure continues to dominate northern Michigan weather Saturday, bringing dry weather along with it.
What moisture there is will be spilling over the Pac Ridge and basically eroding as it hits the Pac NW and spreads inland into our CWA.
Elevated warm front near the Tennessee River continues to spark off numerous showers and thunderstorms in a weakly unstable but moderately sheared environment.
A frontal system will continue to linger in the area tonight into Saturday night, before strong low pressure sweeps through the upper Great Lakes and drags a cold front through the area late Saturday night. A break from the recent wet weather can be expected for the start of the week, before another strong low pressure system brings rain back to the forecast mid to late week.
308 PM MST Fri Feb 23 2018 A series of short wave low pressure troughs in westerly flow will bring Pacific moisture into the western mountains of Wyoming with light snow developing later tonight with very light accumulations possible.
Surface temperatures have cooled to freezing in GBG and are setting up for a brief period of frozen/freezing pcpn as the saturated conditions overspread the area during the early morning hours. North of there, there remains concerns for a mixture of snow/sleet/freezing rain. Will issue a Winter Weather Advisory for Knox and Fulton Counties, where some light icing is expected on elevated surfaces and bridge decks. Any icing will not last long, as temperatures reach above freezing by mid to late morning. Main cold front will be sweeping across the area Saturday evening, with PoP's rapidly dropping off behind the front.
The northern portion of the CWA will be in the upper 20s to lower 30s when the rain moves into the area overnight leading to freezing rain and freezing drizzle mainly along and north of the Highway 36 corridor. By tomorrow afternoon, temperatures will move above freezing with periodic rain throughout the day.
418 PM PST Fri Feb 23 2018 Freezing temperatures will occur across much of the San Joaquin Valle tonight with rural areas falling into the upper 20s and possibly near 25 degrees in a few locations.
Temperatures continue to fall well short of guidance while some locations on ridge tops are close.
An area of low pressure will push to the east tonight, but snow showers will linger this evening across portions of Mohave County.
Low clouds, fog, freezing drizzle and possibly even some light snow can be expected across much of western and north central Kansas late tonight and early Saturday morning.
Latest short term model trends indicate the quasi-stationary boundary should begin to move north as a warm front overnight. Temperatures have warmed into the upper 70s across Northeast Mississippi and portions of West Tennessee near the Tennessee River east of the front while locations across Northeast Arkansas and the Missouri Bootheel are in the lower to mid 50s. Chances for showers and a few embedded thunderstorms will then shift north of the warm front and will likely continue to impact areas of Northeast Arkansas, the Missouri Bootheel, and Northwest Tennessee.
An upper level trough is currently located across the southwestern U. The Trough will track east towards and through the region this weekend with additional rounds for moderate rain expected across region. An upper level disturbance ahead of the main trough is currently tracking northeast across the region this afternoon. Temperatures may actually start to warm later tonight across southern Missouri as warmer air spreads north ahead of the approaching trough. As the upper level trough spreads across the Plains on Saturday a cold front will spread east into and through the area.
Latest water vapor imagery shows a southwest upper flow into North Dakota, depicted as a split flow pattern, with a northern stream trough over south central Canada, and a Great Basin upper low/trough in Nevada/Utah. As stated in the Special Weather Statement, total snowfall accumulations of between 1 and 2 inches can be expected from Bismarck to Jamestown, and from Selfridge to Ashley. Overnight lows wil range from the lower single digits below zero north to the lower single digits above zero south. The light snow will exit the southern James River Valley Saturday night associated with the southern stream upper trough. Perhaps a couple pockets of lingering light snow behind the northern stream upper trough as it slides through late Saturday night, but this only shows up on the GFS/ECMWF and mainly over the northwest.