Aikyam-Lab/Synoptic-Bench huggingface dataset:
346 AM CST Mon Nov 28 2016 Early morning water vapor imagery and radar data illustrate the dry slot centered over the forecast area, associated with the eastern Dakotas upper low. The first will be over west central MN related to the upper low, with the second area of redevelopment anticipated along/east of Interstate 35 in vicinity of the surface front during the late morning and afternoon hours. Tonight precipitation will be primarily focused along the western/northern fringes of the forecast area tied to the upper low, and we should start to see some snow mixing in during the evening as colder air works in. The very highly amplified upper low will be slow to move out of the Upper Midwest this week as a blocking type pattern develops north across central Canada.
Another short wave trough will pass over the region tomorrow morning. The timing of the passage of the trough axis is not optimal for strong winds with wind maxes aloft moving east or south of the region by late morning. Tuesday will be breezy but wind speeds will be a bit lower than we see tomorrow afternoon as another trough moves over the area. Helping to lower wind speeds will be a weak cold front that will move across the forecast area through the day. This will help to relax the surface pressure gradient some as well as bring in temperatures around 5 degrees cooler than Monday.
105 AM EST Mon Nov 28 2016 As high pressure moves offshore, a warm and moist southerly flow will develop beginning Monday. The risk for showers will increase ahead of a cold front mid week.
/Tonight through Monday/ A large, stacked cyclone will move from Nebraska up across eastern South Dakota overnight, then stall along the North Dakota/Minnesota border on Monday. A large swath of showers and a few thunderstorms, associated with the initial surge of moisture advection and vertical forcing on the leading flank of the cyclone, is crossing our forecast area at this time and will continue through the evening before moving off to the northeast. Given the strength of synoptic low-level flow around the nearby cyclone it is believed that any fog will be light and spotty, so have not mentioned it in the outgoing forecast. On Monday afternoon the cold front trailing from the departing gyre will finally push across our area.
1115 PM EST Sun Nov 27 2016 A narrow north to south ridge of high pressure will slide east across Pennsylvania tonight and Monday, accompanied by dry weather with light wind. A frontal system will develop over the plains states and push a cold front through PA on Tuesday. It will be mild and wet in the middle of the week, with cooler air and lake effect snow showers returning for the end of the week. The high cloud shield will also help to level off temps late. A sprinkle may occur over the nrn mtns late in the day as moisture associated with warm advection from the next system spills over the migratory upper ridge.
Water vapor imagery this afternoon has the main upper trough lifting northeast out of Wyoming while an upstream trough was surging southward over western Oregon. With these stronger, veering winds in the lower levels, there is a small chance an isolated storm forms within the better ML CAPE and produces damaging wind gusts. Residual clouds from the stacked upper low to the north during the day Monday may reach as far south as northern Kansas, otherwise skies are partly sunny with highs warming back to near 60 degrees. Large scale upper low pivots slowly across the Central Plains into the Great Lakes through late in the week. This keeps cooler temperatures advecting into our area, with highs in the 50s Tuesday dropping into the 40s for the remainder of the work week, with lows falling into the 20s late week as well.
a trough/dryline has developed over west Texas from near Childress to Lamesa to Midland. Looking for highs tomorrow in the mid to upper 60s, only slightly cooler than today.
1155 PM EST Sun Nov 27 2016 Areas of low pressure will return periodic rain chances to the forecast Monday night through mid week. The low level jet should also result in gusty winds at the surface, though model soundings show the strongest winds remaining capped above the surface.
The higher resolution models like the NAM and HRRR indicate a convergence band combined with upslope will keep some snow going across portions of the Snake Plain.
SW KS is sitting in the large dryslot of an impressive cyclone centered over South Dakota this morning. Raised high temperatures this afternoon several degrees across the board, into the lower 60s, as downslope components offset weak cold advection, and dry ground aids in the warming. Cooler air will persist in the wake of the system for a few days as deep upper level troughing remains across the central and northern plains.
1250 AM EST Mon Nov 28 2016 A narrow north to south ridge of high pressure will slide east across Pennsylvania tonight and Monday, accompanied by dry weather with light wind. A frontal system will develop over the plains states and push a cold front through PA on Tuesday. It will be mild and wet in the middle of the week, with cooler air and lake effect snow showers returning for the end of the week. The high cloud shield will also help to level off temps overnight with mins ranging from the mid 20s to around 30F. A sprinkle may occur over the nrn mtns late in the day as moisture associated with warm advection from the next system spills over the migratory upper ridge.
1140 PM EST Sun Nov 27 2016 High pressure over the upper Ohio valley will move off to the east through monday.
The upper trough is cut off from the upper steering flow, so will not be in a hurry to exit the region. With that said, would not be surprised if places such as Huron to Brookings along the highway 14 corridor picked up a quick inch of snow overnight into Monday morning.
Temps are expected to be a couple of degrees cooler today and tonight, then warmer once again Mon.
345 AM CDT SUN SEP 11 2016 Yesterday's cold front brought unseasonably cool temperatures to West Texas and Southeast New Mexico, as well as decent wetting rains. However, like any cold front this time of year, yesterday's was shallow and highly modified, and so temperatures should rebound back to abv-normal today. WV imagery shows the region under a fairly broad ridge, subdued a bit by generally zonal flow over the nrn CONUS. Thicknesses associated w/this feature are forecast to increase thru Monday afternoon, before the ridge begins breaking down as an upper trough drops out of B.
320 AM CDT Sun Sep 11 2016 Overall, the forecast remains on track with the main issues being a cold front progressing across the state today and this evening. Highs on Monday will only be in the 50s most areas to the low 60s far southeast. Also expect to see extensive clouds along with and post-front, lasting into Monday night before beginning to clear out over the northwest as high pressure builds over the region.
The dry airmass associated with this high pressure will also lead to less humid conditions.
Highs should once again reach the low-mid 90s inland, and heat indices should be around 100 during the afternoon with dewpoints mainly in the low-mid 70s.
358 AM EDT SUN SEP 11 2016 A large area of high pressure over the Mid Mississippi valley will will move across the lower lakes today and then move off the Mid Atlantic coast Monday.
Latest surface observations also confirm that the surface cold front has already passed through Calgary. A Canadian cold front will move southward through the region this morning. The upper level trough presently over northern British Columbia will split and amplify Sunday while crossing the northern Rockies. The associated cold front crosses from north to south on Sunday.
217 AM CDT SUN SEP 11 2016 The main wx story this morning is the sunny Sunday ahead, with cooler temperatures and low humidity. The cold front that moved through our area with strong to severe thunderstorms last evening was located along the Appalachians, down to central AL/MS. Dry high pressure, centered over the Mid MS Valley, was pushing into TN. The high pressure center will move across the Ohio Valley today, continuing to push dry air our way with north northeast breezes around 10 mph. Highs will be mostly in the lower 80s. With water surface temperatures still in the low to mid 80s, patchy late night fog can be expected over lakes and rivers.
Temperatures have dropped into the lower and middle 50s across much of the region. A ridge will begin to build across the southeast region. The departing high pressure will initialize a return flow, which should help increase relative humidity values and temperatures. As the flow backs southwesterly with the building ridge south and a meandering cut-off low along the Pacific coast, we'll have to watch several upper level disturbances that should slide across our area within the flow. Additionally, a cold frontal boundary will make a run toward the region by midweek.
Temperatures will be cool start the day with morning lows in the low to mid 50s thanks to high pressure. high pressure will gradually shift east today allow WAA to begin over the area. Expect highs to warm a few degrees warmer than yesterday but, still below normal with highs in the mid to upper 70s. Expect temperatures to warm further on Monday as continued WAA allows highs to rise into the low to mid 80s. This cold front will approach the area Monday night.
Cold front has passed through the region early this morning, and low to mid 50s dew points are already working into our NW. A few of the coolest spots could see lows dipping into the low 50s.
255 AM EDT Sun Sep 11 2016 Leftover showers behind a cold front will linger over the Western Catskills and parts of the Mohawk Valley this morning. High pressure will build into the area through the day today bringing drier air and fair weather.
A couple of high-res models are showing some showers, and possibly a thunderstorm, holding together as the cold front nears metro ATL overnight. The cold front over the Mississippi Valley will continue to move east and will enter extreme north GA late tonight and stall across north GA somewhere along a Carrollton/Atlanta/Athens line.
127 AM EDT SUN SEP 11 2016 A cold front will finish crossing the area tonight. A large area of high pressure will build northeast into the Great Lakes region by Sunday afternoon.
554 AM EDT SUN SEP 11 2016 High pressure building into the area will provide VFR conditions through the forecast period. The dry airmass associated with this high pressure will also lead to less humid conditions.
clear skies abound as the CWA lies under weak surface ridging ahead of a lee-side trough over the Front Range. southerly surface wind gradient increases thru the day as ridge breaks down to the east allowing for lee-side trough to become main wx factor. Tonight into Monday will have trough to the west work out into the Plains region. CAA on surface front will follow the trough thru the day Monday bringing a drop back to more fall-like conditions for W/NW areas as highs will only be in the 70s.
400 AM PDT SUN SEP 11 2016 A low pressure system will move inland across central California today and produce a few showers and thunderstorms over the higher elevations of the Sierra this afternoon into this evening.
/issued Issued by National Weather Service SAN ANGELO TX/ Cold front has pushed southward out of the forecast area today. with scattered showers and thunderstorms lingering this evening across the Lower Trans-Pecos and Big Bend Region. No major changes to the extended as the next upper trough digs into the western US on Monday. As the upper trough heads east through mid to late week. rain chances will increase, with cooler temperatures and abundant cloud cover continuing.
324 AM CDT SUN SEP 11 2016 323 AM CDT Relatively quiet conditions across the area this morning as high pressure pushes east over the region. Clear skies and dry conditions allowing for some cool temps in the low 50s to upper 40s this morning. Similar conditions expected tonight but with slightly warmer temps, as high pressure begins to slide to the east and a more WAA pattern sets up.
156 AM EDT Sun Sep 11 2016 Say good bye to the humid and very warm weather as more comfortable weather arrives in wake of a cold front today. Temperatures return above normal by Monday through mid week before the next cold front is projected to move through. Cooler and a less humid air mass will overspread the area today.
Water vapor imagery shows a ridge centered over the general vicinity of northern Chihuahua Mexico with the ridge extending into New Mexico. Meanwhile, a weak small low pressure system is centered over south central California.
Have kept lows up, especially in exposed areas along the Buffalo Ridge. The chance for showers and thunderstorms will be found along and ahead of a cold front moving southeast through the area.
A much warmer day is on tap today. Overnight lows will be warmer too and in the 60s. Another warmer day is expected on Monday.
A strong cold front will push south across the WY/MT border around 00z Monday, to a vicinity KCPR-KRIW line by 06z Monday. Areas of MVFR/IFR ceilings and -RA BR will follow behind the cold front by a few hours, prevailing vicinity and north of a KCPR-KWRL-KCOD line by 12z Monday.
Upper troughing was located over southwestern Canada, with another upper trough positioned across the Lower Great Lakes/Ohio Valley. Today-Tonight: Upper troughing will dig southeastward into the western states.
High Skies should be mostly clear today and tonight under high pressure. Looks like enough of a pressure gradient tonight as the high shifts eastward a bit to limit fog development.
433 AM EDT SUN SEP 11 2016 Upper ridge weakening and getting suppressed to the south this morning as an upper trough moves through the Great Lakes and Ohio Valley toward the Atlantic coast. Max temperatures should be a few degrees cooler mainly north today.
VFR expected today with light north winds becoming northeast and then east by tonight, courtesy of a weak cold front pushing through the area. Tomorrow, VFR will continue with veering winds courtesy of the passage of a weak cold front. /issued 230 PM CDT SAT SEP 10 2016/ SHORT TERM (Tonight through Sunday Night): Water vapor imagery shows an upper level low over the upper Texas coast this afternoon. A mid level height center over the Southeast United States is supporting high pressure over the northern Gulf Coast. A short wave trough is currently digging into the southern plains with a cold front draped across central Texas. The weak cold front is expected to stall just north of the CWA.
Pattern synopsis and forecast: Upper level troughing and low pressure continue to press well east of the region this morning, with warming aloft with increased subsidence. Winds continue to die down through the day while there may also be some thin cirrus at times ahead of the cold front. Temperatures cooler with highs in the upper 60s to lower 70s. Not much action tonight either, with mostly clear skies while the next cold front is still well west, just edging into the upper Mississippi valley. Lows in the upper 40s in low lying eastern areas, with upper 50s in eastern upper where SW winds increase aloft, and come in off warmer Lake Michigan.
High pressure will slide off to the east today resulting in increasing south winds with gusts of 15 to 20 mph expected by midday along with warmer max temps by several degrees. Tonight south winds will persist with modest moisture advection expected to occur which will keep overnight lows much warmer in the 60 to 65 degree range Sunday night.
This occurring with heating along with east to southeast progression of mid-level trof now positioned from northeast Louisiana to along the upper Texas coast and extreme western gulf waters. Return to somewhat lower pops for Monday as deeper moisture with aforementioned trof advances east of the area. A cold front has edged into the northwest gulf this morning. The front will wash out on Monday, with a steady easterly flow returning through mid-week between high pressure ridging across the southeast Conus and weak low pressure advancing slowly west across the central gulf.
122 AM EDT SUN SEP 11 2016 A cold front crosses the area today, then stalls over the Carolinas tonight and Monday.
212 AM PDT SUN SEP 11 2016 Upper low moves into the Pacific Northwest today bringing a pattern change for the next few days.
Main northern stream trough will split as it progresses east across central Canada, orphaning a closed low over the western conus. Cold front will push through the fa tonight with a period of gusty northerly winds expected on the sd plains. Northern stream upper trough and associated lsa will graze the region Monday with increasing mid level lift and ll moisture. As for temps, look for 80s and 90s today with much cooler readings Monday behind the cold front with many locations seeing 50s and even 40s for highs over ne WY and far western SD.
A strong cold front is evident on IR imagery tonight near the Canadian border. Forecast totals look fairly similar to the previous forecast with 6-8 inches likely over the highest ranges. Skewed the PoP chances on Monday toward the high-res guidance which indicates some precip might linger a bit longer into the afternoon across much of the area. Low temp guidance for Monday night has also trended downward with this package, temps should be in the 30s region wide with 20s over the high terrain.
Mixed winds are rather light however, only on the order of 15 to 25kts with the higher magnitude winds over the eastern CWA. The period starts off with a cut off low over the far western CONUS, and short wave ridging over the western high plains.
An upper trough will swing out of British Columbia this morning and begin to split as it moves across Montana this afternoon and tonight. By midweek a cut off low will be in place over the Great Basin while the northern portion of the trough moves through central Canada. Cold front currently diving south across Alberta and Saskatchewan will move across the state today. Canadian high pressure slides into the forecast area on Monday with mainly dry but cool weather. Most areas will have temperatures near or below freezing which will be the first freeze of the season.
645 AM EDT SUN SEP 11 2016 Cooler and drier air on tap for today in the wake of a cold front. High pressure to start the work week.
326 AM EDT SUN SEP 11 2016 A cold front will cross the region today and high pressure will build in behind the front tonight. High pressure will settle offshore south of New England on Monday.
At the surface, a ridge of high pressure was situated over the forecast area. A short- wave trof will bring some mid-level clouds to mainly northern WI this morning. Highs will be in the lower to middle 70s. On Monday, gusty southwest winds will continue to pull warmer air into the region, resulting in above normal temperatures well into the 70s. A cold front will approach our far nw counties late in the day, and could bring a few thunderstorms Kieckbusch west of an Eagle River to Tomahawk line.
336 AM EDT SUN SEP 11 2016 A weak cold front will move into the forecast area today and stall.
A pretty robust cold front is closing in on northwest Montana this morning. This will help to expedite the lowering of snow levels to around 5000 feet.
328 AM CDT SUN SEP 11 2016 Mild day expected ahead of approaching cold front. Warm advection continues during the day with thermal ridge axis over the fa during the afternoon. From Satellite imagery could see a break in the high level cloudiness which will also help with temperatures along with S-SW-W surface flow. Cold front reaches the NW FA early evening and gets through most of the FA by morning. Cold advection continues Monday in wake of cold front. Convective temperatures remain fairly high during the day so unsure of the degree of cloud cover especially in the lower levels.
The large fair weather system will continue to drift away from our area tonight, but still close enough to the region to bring another pleasant night with early morning lows dropping back down into the low to mid 50s.
NW winds will usher in a cooler, drier airmass overnight. As of mid-afternoon, a strong surface cold front extended from central Indiana through western and central Kentucky down into portions of northwestern TN. Drier and cooler air will surge into the region later this evening and overnight with steady northwest winds. Sunday will be a very pleasant, early fall day across southern Indiana and central Kentucky with low humidity, temperatures in the 70s and overall light winds as the center of high pressure moves overhead. Plan on a refreshingly cool night as well with lows dropping into the 50s across the region by Monday morning, the coolest spots may dip into the low 50s.
Cold front has passed through the area and much cooler and drier air is filtering into the Mid-South.
The cold front has pushed entirely south of our area, with light north winds and drier air in it's wake.
317 AM EDT SUN SEP 11 2016 Weak flow aloft will prevail over the region today as a weak trough shears out east of the Carolinas. An upper ridge centered near Bermuda will weaken during the day, but build westward into the region overnight tonight. Highs today will be hot in the low to mid 90s, except upper 80s along the coast. Overnight lows will be in the low to mid 70s.
1205 AM MDT SUN SEP 11 2016 AVIATION SECTION UPDATED A cold front has passed through the northern portion of the CWA with a northerly switch of winds and cooler temps. Zelzer A Canadian cold front has pushed into Southwest Montana and will move into Idaho by this evening. A Canadian cold front will continue to move south across the area today.
619 AM EDT SUN SEP 11 2016 A weak cold front will move into the forecast area today and stall.
Lee troughing will deepen throughout the day as the upper level pattern transitions to nearly zonal to southwesterly. The combination of the breezy south- southwest winds and maximum insolation highs will be close to normal for mid September, in the low to mid 80s.
At the surface, high pressure centered over the southern plains today will be replaced by a trough of low pressure over eastern Colorado on Sunday.
Weather maps this morning show a high level trof pivoting quickly eastward across the Upper Midwest and Great Lakes, having pushed a surface front deep into the south. With the bulk of the energy associated with the high level trof axis lifting quickly up across the New England states today, the frontal zone is left behind and begins to slow its southeastward movement, becoming quasi-stationary over the interior of the forecast area. Highs forecast in the lower 90s and overnight lows in the lower to mid 70s.
1208 AM CDT SUN SEP 11 2016 The cold front has pushed south through all the terminals early this evening. Tonight Through Monday Observational data indicate the cold front has reached a line from Brinkley to Gurdon.
A cold front will swing through the area later this morning. High pressure will build back into the region Monday.
Today and Monday expected to be warm with several sections reaching the lower 90s.
424 AM CDT SUN SEP 11 2016 (Today and Tonight) Quiet weather is expected today and tonight with weak ridging aloft. 19 (Mon-Wed) We'll start off the work week dry and warmer Monday as an upper level high pressure system moves east of the area. An upper trough is also progged to dig across the Intermountain West, forming an upper low along the Oregon/Idaho border early this week.
626 AM EDT SUN SEP 11 2016 Cooler and drier air can be expected today through Monday as high pressure slides across the region. Lows tonight will be in the lower to middle 50s.