Aikyam-Lab/Synoptic-Bench huggingface dataset:
818 PM CST Fri Jan 17 2020 Cloud cover is streaming up from the Gulf of Mexico ahead of the strong low pressure system centered over western Minnesota this evening. The strong low level jet will magnify moisture transport greatly through the morning into the early afternoon hours in advance of the Arctic cold front. This should result in light precip with the lower clouds within isentropic ascent. But as the day goes on, our area will be within low level speed divergence as the low level jet max pulls northeast through TN into KY. The dPVA associated with the main upper low/trough will be to our north as the low swings east through the OH valley. Cold frontal convergence should bring widespread light to moderate showers during the frontal passage Saturday afternoon and early evening.
Look for quiet and benign conditions through the weekend as high pressure builds in from the west.
Precipitation later today will be a mix of sleet, drizzle, and freezing drizzle. However, the concern tonight will be a refreeze when temperatures drop below freezing as a strong cold from moves through the area. The cold front will bring noticeably colder temperatures and sustained winds 25-35 mph with potential 60 mph wind gusts.
W-NW sfc winds behind a passing cold front will ensue later tonight with gusts of 20-25 becoming common across the area and continuing for the remainder of the period at all sites. /Issued 333 PM CST Fri Jan 17 2020/ Temperatures have warmed above freezing in all areas this afternoon and the slow upward trend will continue through the early part of tonight. Cold front will eventually move in late tonight with drier and cooler air, with temperatures falling in most areas after peaking sometime during the night. Post-frontal airmass is not especially cold and with expected full sun and even a slight downslope component to the sfc winds, temps will likely be a bit warmer than NBM guidance.
533 PM CST Fri Jan 17 2020 A two pronged weather event tonight featuring a Pacific cold front across WY sweeping through swrn Nebraska and a strong arctic cold front across MT/SD sweeping through ncntl Nebraska. The models appear to have backed off on the strength of the Pacific cold front as wind gusts are expected to reach about 55 mph across the swrn Nebraska but remain strong near 60 mph across ncntl Nebraska. A few counties have been added to the High Wind Warning, including Custer county as the models show a strong corridor of 65-70kt h850mb winds reaching down into scntl Nebraska. No bias correction was used for Saturday's highs which are about 3 to 6 degrees cooler than the straight guidance blend.
The prominent dry slot associated with the upper trough is entering western Kansas this afternoon. There is a chance for a few showers to linger in the late afternoon, otherwise the low stratus will settle in for the evening. As the trough axis and associated cold front passes through, winds shift to the northwest, becoming strong at 15 to 25 mph with gusts in excess of 40 mph through sunrise. Dominant precip type for the area is rain ahead of the front with perhaps light snow or freezing rain in far northeast Kansas.
Main snow tonight as inverted trough sets up west of the Red River valley nr DVL-JMS. Then as low moves farther ENE into northeastern Iowa or SE Minnesota the trough will move east and winds will turn northwest and increase quickly with falling temperatures spreading eastward thru E ND overnight and into MN early Saturday.
Decided to add Niobrara and the rest of the Nebraska Panhandle into the High Wind Warning as subsidence behind the front expected to continue. Strong winds should subside by late morning as the low and mid level gradients relax. Temperatures will be colder in the wake of the passing cold front.
Temperatures today remain cool in the wake of yesterday's cold front with Valley highs in the 40s to 50s and mountain highs in the 20s to 30s. A trough moving through the PacNW Saturday will graze Northern California bringing a chance of light rain & snow showers to the Coastal range and Shasta County.
344 PM CST Fri Jan 17 2020 Temperatures look to be relatively stagnant for the rest of the day into overnight as the front that passed through the area returns back as a warm front. There might be a small window of fog possible as some return flow is coming in along with the warm front but should be a brief window. The next chance of rain will be Saturday as a much stronger cold front passes through.
Look for showers, and perhaps a few embedded tstms to develop and expand along a prefrontal trof that'll be making its way into northern parts of the area toward sunrise and eventually off the coast late in the afternoon. Much cooler and breezy conditions are expected in its wake. The cold front that traversed the area through the day on Saturday will be off into the Gulf Saturday night. This will allow for temperatures to fall into the low to mid 40s over night and an end to the foggy conditions that has plaguing the region over the past week or so.
This trough is ejecting into the Central Plains and will move across the OH Valley early Saturday. A well-defined warm conveyor belt is observed to the east of the trough axis with a dry slot wrapping into the nearly vertically stacked cyclone. Rain showers will increase in areal coverage tonight as isentropic ascent intensifies ahead of the approaching trough.
848 PM EST Fri Jan 17 2020 A deepening area of low pressure will cross the Great Lakes Saturday, tracking north of Pennsylvania.
/28/ Tonight into Saturday: Main forecast focus for tonight will revolve around increasing rain chances as we see a warm front lift back N/NE, then a cold front will push through the area Sat afternoon from NW to SE. /CME/ Saturday Night through Friday: The chance for showers and an isolated thunderstorm will quickly exit the Pine Belt as the cold front continues to push southeast of our forecast area.
Otherwise, a cold front will move through Saturday mid morning, shifting winds to the NE for the remainder of the afternoon. /issued 130 PM CST Fri Jan 17 2020/ An upper trough swinging across the Rockies today will pass onto the plains tonight. As the trough moves off to the east high pressure will build across NM and TX from the west.
A warm front will move into the state tonight followed quickly by a cold front on Saturday. Widespread rain and a few isolated thunderstorms are expected near the cold front. Widespread rain and a few isolated storms expected areawide tonight as a cold front moves across the state.
333 AM EST Sat Jan 18 2020 The upper level trough will lift through TN Valley today and into the Mid Atlantic region by this evening.
This evening through Saturday night Light snow continues to fall this morning over areas of the far west, as a cold front continues to progress eastward. Winds are expected to increase this afternoon, in the wake of the cold front. Northwest flow will be in place in the wake of the storm system and a ridge building over the Northern Great Basin and Northern Rockies.
1152 PM CST Fri Jan 17 2020 Terminals mainly in the MVFR range this evening, with the exception of KHUM, which is in the high end IFR with FL009 ceilings. Expect persistent ceilings falling into the high end IFR to low end MVFR range at terminals with occasional showers moving across terminals. /issued 344 PM CST Fri Jan 17 2020/ Temperatures look to be relatively stagnant for the rest of the day into overnight as the front that passed through the area returns back as a warm front. There might be a small window of fog possible as some return flow is coming in along with the warm front but should be a brief window. The next chance of rain will be Saturday as a much stronger cold front passes through.
1137 PM CST Fri Jan 17 2020 A two pronged weather event tonight featuring a Pacific cold front across WY sweeping through swrn Nebraska and a strong arctic cold front across MT/SD sweeping through ncntl Nebraska. The models appear to have backed off on the strength of the Pacific cold front as wind gusts are expected to reach about 55 mph across the swrn Nebraska but remain strong near 60 mph across ncntl Nebraska. A few counties have been added to the High Wind Warning, including Custer county as the models show a strong corridor of 65-70kt h850mb winds reaching down into scntl Nebraska. No bias correction was used for Saturday's highs which are about 3 to 6 degrees cooler than the straight guidance blend.
Low CIGs and showers will stick around through much of the day Saturday as a cold front sweeps through the region. Tried to show a slower cooler trend, especially in the east, where temps were in the lower 60s. Still looks like the rain will move in late tonight from the west as the cold front approaches.
/Issued 307 PM EST Fri Jan 17 2020/ The rest of today is expected to remain dry with high pressure at the surface.
835 PM MST Fri Jan 17 2020 Cloud coverage has increased across the area this evening associated with the low pressure system along the PacNW coast.
Cloud cover is streaming up from the Gulf of Mexico ahead of the strong low pressure system centered over western Minnesota this evening. The strong low level jet will magnify moisture transport greatly through the morning into the early afternoon hours in advance of the Arctic cold front. This should result in light precip with the lower clouds within isentropic ascent. But as the day goes on, our area will be within low level speed divergence as the low level jet max pulls northeast through TN into KY. The dPVA associated with the main upper low/trough will be to our north as the low swings east through the OH valley. Cold frontal convergence should bring widespread light to moderate showers during the frontal passage Saturday afternoon and early evening.
Tried to show a slower cooler trend, especially in the east, where temps were in the lower 60s. Still looks like the rain will move in late tonight from the west as the cold front approaches.
/Today through Sunday/ A broad area of showers continues to stream across the region this morning in advance of a cold front, which is currently moving through the DFW metroplex as 4 AM. As the cold front enters our region later today and LL heating is introduced, some embedded thunderstorms may accompany the shower activity through the late morning and afternoon hours. Overnight low temperatures will range from the upper 20s far NW to the lower and mid 30s farther south and east across the remainder of the region. Expect a slow recovery of temperatures with highs only expected to reach the lower to mid 50s across the region as cold Canadian high pressure will become centered over north Texas along the middle Red River Valley.
Warm front is moving inland this morning and the next cold front is well on its way. The front is expected to move through the area overnight bringing some breezy conditions to the area but nothing out of the ordinary as far as a winter season cold front is concerned.
315 AM PST Sat Jan 18 2020 This weekends weather will be dry and mild with weak high pressure aloft and offshore flow at the surface.
Higher amounts of 5-7 inches will accumulate along the high terrain of the northern Susquehanna region and over portions of the Finger Lakes and Western Mohawk Valley. Lake bands will continue into Sunday night, but ridging and drier air starts to push into the region and NW flow turns to a more northerly position with the ridge building in.
340 AM CST Sat Jan 18 2020 A cold front has pushed into the northern Texas Panhandle and will continue to move south through the day, eventually clearing the southern counties shortly after mid-day. Highs will be about 10 degrees cooler across the Caprock but about 10 degrees warmer than yesterday across the Rolling Plains where skies will be clear through the day and sunshine will offset the cold air advection.
An approaching cold front will bring very windy conditions and a band of showers across the area today.
540 AM CST Sat Jan 18 2020 /12Z TAFS/ Cold front along an Ozona. Then, a cold front will move across the area as the ongoing cloud cover clears. Winds will be coming from the north at around 10 to 20 MPH as this cold front passes through.
238 AM MST Sat Jan 18 2020 Arctic high pressure will be over Central and Eastern Montana today and Eastern Montana tonight. The high remains over NE Montana on Sunday. While an upper ridge builds over Western Montana and warmer air starts to move in aloft. Shallow arctic air remains in place which will keep temperatures cold although they will be somewhat warmer.
559 AM CST Sat Jan 18 2020 Showers and an isolated thunderstorm will continue through the morning ahead of and along a cold front. Clear skies are expected tonight and Sunday morning as high pressure builds into the area. Today Through Sunday Night An upper trough will quickly move through the area this morning. This trough will move to the east coast tonight with the parent low over the Great Lakes. An upper ridge builds over the western U. A warm front moved across the area overnight and brought warming temperatures to many areas. Now, a cold front in eastern Kansas to central Oklahoma is poised to move through the state during the day.
343 AM CST Sat Jan 18 2020 A strong cold front has pushed across the CWA this morning with temperatures falling several degrees as the northwest winds increased. Of note, it stopped snowing in Mobridge around midnight, and their 3 AM observation still suggest blowing snow with visibility below 2SM.
337 AM CST Sat Jan 18 2020 Rain is finally making its way into Middle Tennessee this morning as southerly winds bring in some warmer air from the south. This system moves out quickly this evening as a cold front pushes through the area ushering in winter temperatures once again.
Rain has already started to spread into the region from the west ahead of an approaching cold front. MOst of the region will wake up Sunday morning to temperatures in the 30s, 35-40 degrees cooler than Saturday's highs. General troughing over the eastern half of the country will be reinforced by a wave diving into the Plains Sunday night.
425 AM CST Sat Jan 18 2020 Rain has already started to spread into the region from the west ahead of an approaching cold front. MOst of the region will wake up Sunday morning to temperatures in the 30s, 35-40 degrees cooler than Saturday's highs. General troughing over the eastern half of the country will be reinforced by a wave diving into the Plains Sunday night.
(Today) Upper ridge will begin expanding over the plains today as eastern U. upper low continues moving east. Broad sfc ridging centered to our east will result in light south winds, but also continue to favor low dew points this afternoon. Temps should be at least a few degrees warmer.
(Today and tonight) A weak cold front will slowly push through the area today with a drier airmass behind it. Low temperatures will be noticeably cooler in the upper 50s to lower 60s across the northwest half of the area, with mid 60s to near 70 across the southeast half.
(Today and tonight) Upper ridge will build east out into the Plains today. This along with veered low level flow will bring low level thermal ridge east with it resulting in warmer temperatures for today. Meanwhile developing western trough will also result in pressure falls across the high Plains and strengthening pressure gradient and increase in south winds. This will aid in warmer nighttime temperatures as well Tuesday night.
222 AM EDT Tue Sep 13 2022 A cold front slowly pushes across the local area today. High pressure from Canada will build over the mid-Atlantic region for the middle and end of the week, resulting in dry and pleasant conditions. Cold front is slowly entering far wrn portions of the FA attm.
Only concern for overnight is wildfire smoke aloft streaming in aloft from the Pacific Northwest over ridging upstream. Otherwise a closed upper low over the Midwest and aforementioned ridge will continue to block moisture flow into the region, bringing dry conditions, light winds, and mostly clear skies tonight and Tuesday. Expect slightly warmer conditions Tuesday as we mix through a warmer low level inversion and upper ridging over the Rockies starts to build eastward. Wednesday brings heightened fire danger with breezy south winds and warmer conditions with highs peaking in the mid 80s to mid 90s. The 12z guidance came in breezier, suggesting the low level jet will allow for southerly winds to gust 25-35 mph, strongest west of the I-29 corridor.
Upper pattern this afternoon shows a departing H5 low over the Great Lakes pulling off to the east with upper ridging over the central plains. Ridge will continue to build eastward through the period and cresting over the state Wednesday. Temperatures will warm back into the mid to upper 80s across the CWA which is a few degrees above average, Dew points will remain on the lower side Tuesday but climb a few degrees Wednesday courtesy of the aforementioned southerly winds.
116 AM EDT Tue Sep 13 2022 A cold front will head toward the East Coast tonight, which will end the threat of showers and thunderstorms across the Mid Atlantic. High pressure should arrive by Tuesday to provide dry weather through the remainder of this week. A cold front is approaching the Blue Ridge at this time, which is helping to trigger scattered showers and thunderstorms. The storms should gradually fade during the next couple hours, and the cold front will depart toward the East Coast. Drier air will arrive from high pressure building from the northwest. Morning temperatures will range from the low 50s across the mountains to the upper 50s to lower 60s across the foothills and piedmont.
1253 AM CDT Tue Sep 13 2022 (Tonight through Tuesday) A much drier and cooler air mass has settled over Central Alabama. There's only a small chance for isolated or scattered showers/storms across the southeast this afternoon as the mid-level portion of the trough passes by, but the drier air should greatly limit coverage. Cool, Fall-like temperatures are expected in the morning with lows ranging from the lower 50s northwest to lower 60s southeast. For now, the entire CWA has zero PoPs in the forecast for at least the next 5 days as ridging remains in place at the surface and aloft.
Mid and upper-level ridging over the Plains will build east into the Mississippi River Valley, while low-level high pressure does the same, except for a minor push of drier air into the area late Wednesday. These showers will be very spotty and generally light, and in some cases may not be depicted in text or graphic forecasts depending on the lower threshold for mentionable PoP and QPF.
(Today through Wednesday) Weak 500 mb troughiness over the BRO CWFA, courtesy of closed 500 mb low pressure moving over the Great Lakes area, will prevail during a majority of the forecast period before being replaced by weak inverted troughiness for the final 12 hours. However, a burst of generally scattered showers and thunderstorms is forecast for Wednesday as the inverted mid-level trough combines with deepening tropical moisture.
KEY MESSAGES: - Dry weather through Wednesday, followed by warmer and more humid conditions and several small chances for showers and thunderstorms through the weekend. The upper low spinning over the Great Lakes has worked to bring smoke aloft southward across western Minnesota. Southerly flow will advect warm moisture northward Wednesday with dew points creeping up into the upper 50s and low 60s and temperatures in the mid 80s along the Buffalo Ridge and upper 70s/low 80s elsewhere.
RAP upper air analysis and water vapor satellite imagery at 0530Z depict a weak ridge is located along the Rocky Mountains, with a powerful cut-off low over the Midwest/Great Lakes region. At the surface, southerly winds will be increasing through the day Tuesday owing to lee cyclogenesis occurring as the upper level ridge exits the western CONUS and is replaced by weak longwave troughing. As the upper level ridge passes overhead, another 3-4 degrees C of warming is forecast at 850-mb, and surface temperatures will breach 90 with afternoon highs mainly in the mid 90s. Overnight Tuesday, southwest KS will remain quiet, however winds will linger in the 10-15 mph range fostering a much warmer Wednesday morning as radiational cooling is subdued. Therefore, lows in the low to mid 60s can be expected.
1051 PM CDT Mon Sep 12 2022 (Tonight) Skies have cleared out and our dew point temperatures are 15 degrees lower than they were at this time last night due to the passage of the cold front.
1151 PM CDT Mon Sep 12 2022 (The rest of tonight) Clear skies and light winds are forecast across the region tonight as high pressure prevails.
237 AM CDT Tue Sep 13 2022 Upper ridging will slide eastward over the Plains today with the corresponding low level thickness rises/warming resulting in the return of a more intense heat with highs above 90F across central and southern Kansas. On Wednesday, remnant tropical moisture originating from the baja region will advect northward into the upper trof lifting northeastward across the Rockies. While the low levels will remain relatively dry, increasing mid and high level moisture/clouds may begin to impact western portions of the area late in the day.
An upper low transitioning across the eastern Great Lakes today will maintain stratocu cloud coverage and result in a few isolated showers mainly north of PGH during the day. Dry conditions and clearing skies are forecast this evening as the low fills and exits to the northeast. High pressure will provide a nice day Wednesday with plenty of sunshine and comfortable conditions.
249 AM CDT Tue Sep 13 2022 Low pressure over the Midwest/Great Lakes continues to slowly track eastward taking the clouds with it. Upstream plenty of clear skies is noted on satellite with surface ridging from Minnesota through western/central Iowa leading to cool temperatures in the 40s to around 50 degrees expanding into eastern Iowa and northeast Missouri with the clear skies. Further upstream, cirrus was streaming across the Northern Plains as energy tops an upper level ridge over the Rockies. Lows likely will range from some 40s in cool drainage areas, where patchy shallow fog is possible, to the lower 50s beneath mainly clear skies with some mostly thin cirrus. Trends further out suggest the potential for warmer than normal temperatures into late September.
1208 AM CDT Tue Sep 13 2022 (Tonight through Tuesday night) A low pressure system centered over the Great Lakes region will continue to slide northeastward through the short term period with an associated cold front extending all the way into southern Texas. This boundary is expected lift northward this afternoon as a warm front. While the boundary will remain well north of the CWA Tuesday, weak coastal troughing will keep a slight chance of isolated shower and thunderstorm activity in the forecast for mainly coastal counties and over the waters. Temperatures will remain near normal with highs generally in the 90s and overnight lows in the low to mid 70s.
920 PM MDT Mon Sep 12 2022 Current surface map trough across northeast Wyoming/northwest South Dakota. with weak cold front across northern Montana. Thick smoke layer aloft trapped in upper level ridge, while surface based smoke is starting to limit visibility behind the trough. Period of breezy northwest winds are expected behind the trough this afternoon. Upper ridge remains in place Tuesday with more smoke/haze. Daily chance of showers/thunderstorms continue into the weekend with slightly cooler temperatures.
Yucaipa Ridge, above Forest Falls, received 1. A drying trend will occur Tuesday and Wednesday as we return to west flow aloft with moderate troughing over the Pacific Northwest. Thunderstorm chances are marginal Tuesday, with the most likely scenario being that thunderstorms will happen only near the higher peaks. Most model/ensemble solutions show a deepening trough or upper low along the West Coast this weekend which could bring some cooling but at this point appears unlikely to bring precipitation.