Aikyam-Lab/Synoptic-Bench huggingface dataset:
809 PM MDT Mon Apr 20 2020 No update to inherited forecast this evening, with ridging building into the area.
302 PM MDT Mon Apr 20 2020 High pressure across the Northern Rockies and Montana will maintain dry and relatively mild conditions across the region through the early part of this week.
716 PM EDT Mon Apr 20 2020 Cold front on Tuesday with rain and storm potential.
653 PM CDT Mon Apr 20 2020 Partly cloudy skies will continue this evening but should clear tonight as a cold front moves across central Illinois. A cold front will move southeast through the area this evening. Temps are expected to be cooler than today but definitely warmer than what was experienced last week. All models are in decent agreement that the low pressure area associated with the next weather system will move across the middle Miss valley south of the CWA; however, they differ as to how far south of the CWA.
819 PM MDT Mon Apr 20 2020 Alhtough most clouds have cleared this evening, another area of mid level clouds are approaching from the northwest as a weak wave slides southeastward from Canada and warm air advection has increased as flow transitions from cyclonic behind the large trof over eastern US to the ridge building over the Rockies. Tuesday Through Monday Robust warm air advection, centered around 850 mb, will support much warmer temperatures tomorrow with many areas well into the 60s and 70s.
An initial area developed across the south along a pre-frontal trough in an area of marginal (50-200 J/Kg) of CAPE. A second area of SHRA is getting going near the main cold front in the area of best mid-level forcing.
Scattered showers along and ahead of a cold front now located across southwest Florida and the adjacent Gulf waters this evening will gradually end toward morning as the front continues to move to the south and drier air filters in from the north. Temperatures tonight will be cooler than previous nights with lows in the lower to mid 60s expected from north to south. Temperatures on Tuesday will still remain above normal with highs topping out in the lower 80s north, and mid to upper 80s central and south but with lower humidity levels it will feel more comfortable outdoors.
Mostly zonal flow expected aloft of the local area, with a trough axis swinging through the Great Lakes Region towards New England tonight. At the surface, this will push a dry cold front through the area late tonight. Highs will be mostly in the low-mid 80s this afternoon dipping into the 50s overnight.
309 AM EDT Tue Apr 21 2020 A cold front will be exiting to the east today as high pressure settles from the upper Midwest into the mid-Mississippi Valley. We'll be a little cooler than yesterday, with highs mostly from the upper 50s to lower 60s.
Winds will increase in the afternoon, and afternoon temperatures will be 5-7 degrees cooler compared to today.
1012 PM MDT Mon Apr 20 2020 Showers today and tomorrow will give way to warmer and quieter weather midweek, followed by another round of showers later in the week. Much warmer weather is in store for the weekend.
323 AM EDT Tue Apr 21 2020 Broad troughing remains over much of the eastern part of the country while at the surface, low pressure has exited off the New England coast with its associated cold front still over south Florida. For today, high pressure will build in from the west, with rain chances coming to an end later this morning. Afternoon highs will still be warm, but the lower dew points should make it feel at least a bit nicer outside.
Weak ridge passes Thu night/early Fri but next system really on the move. There is a theme here, as upper troughing really remains dominant factor over the eastern US through this period.
1228 AM CDT Tue Apr 21 2020 Pacific high pressure located across the nrn Rockies this afternoon will build into wrn and ncntl Nebraska tonight. A second area of high pressure across Canada this afternoon will build through the Midwest tonight. The resulting consolidated area of high pressure across the Midwest Tuesday will produce southwest winds and warming temperatures across wrn and ncntl Nebraska. April shower and thunderstorm chances this week revolve around an upper low dropping through the nrn Plains and Midwest.
1154 PM CDT Mon Apr 20 2020 Scattered to numerous showers and thunderstorms will continue into early this evening as a short wave trough and associated surface cold front continue to push southeast across the region.
Dry high pressure builds in across the region behind the front tonight, but it does not stay over the area long as it slides off the GA/SC coast Wed afternoon. High temps today will be a bit warmer with highs in the 70s to lower 80s.
301 AM CDT Tue Apr 21 2020 Weather conditions look relatively benign early this morning as calmer winds and a drier airmass have moved into the area behind yesterday evening's cold front. Observations show dewpoint depressions on the order of several degrees across the area, so not expecting much, if any, fog potential this morning given the lower dewpoints.
A decaying cold front will pass through our entire late today and early tonight, while a high pressure system bridges over this boundary.
As far as temperatures, it has been trending cooler for today, which makes sense given that surface winds remain south or south-southeast (not west or southwest).
A weak cold front is situated to our northwest early this evening and will swing across Middle Tennessee later tonight.
Clouds will increase, thicken and lower today across southwest Kansas as 850mb to 700mb moisture and warm air advection improves ahead of an upper level trough that will be approaching from the west southwest. Strong to severe thunderstorms will be possible late today and early tonight across far southwest Kansas and along the Oklahoma border based on the 30 to 35knot 0-6km shear developing near a 0-1km theta-e ridge and instability axis. With the instability and moisture axis forecast to be located just south and southwest of Elkhart the better opportunity for severe weather may end up staying just south of the Oklahoma border but as the upper level trough exits New Mexico and moves into the Panhandle of Texas the mid level instability will improve across southwest and south central Kansas after sunset.
/issued 322 AM CDT Tue Apr 21 2020/ An upper trough is over the Great Lakes region and another weaker upper trough is over Southern California. The upper trough to the west will move over the Four Corners Region this afternoon with southwest winds over West Texas and southeast New Mexico. Temperatures today will be similar or slightly warmer than yesterday with highs mostly in the 80s and 90s. The upper trough will begin to move over the region tonight with a dryline across the Permian Basin and Lower Trans Pecos.
312 AM CDT Tue Apr 21 2020 High pressure will build into the Mid-South today. Clouds will begin to increase tonight as high pressure shifts to the east and a warm front begins to lift northeastward across the Southern Plains.
221 AM EDT Tue Apr 21 2020 High pressure and fair weather expected Tuesday with a dry cold front crossing the region Tuesday evening.
206 AM EDT Tue Apr 21 2020 A cold front will move across the area late tonight and early Tuesday morning. In the wake of the cold front, it will be breezy until high pressure builds in Tuesday night.
445 AM EDT Tue Apr 21 2020 Winds will increase today again behind a cold front with gusts above 30 mph likely from late morning into mid afternoon. Temperatures should dip below freezing where skies remain clear to partly cloudy.
230 AM MDT Tue Apr 21 2020 A backdoor cold front moved into the far northeast end of the state Monday evening and brought some mid level clouds to the forecast area overnight.
Troughing will dominate east of the Mississippi River, with unsettled conditions seen across the Ohio and Tennessee valleys.
255 AM MDT Tue Apr 21 2020 Current upper level analysis has highly amplified flow with a trof across the eastern CONUS and a ridge over the west. At the surface, high pressure resides across the eastern Dakotas and Minnesota. Low pressure is located across southern Alberta and Saskatchewan with a lee trof across central Montana and Wyoming.
The upper-level trough will move eastward out of the Great Lakes region today, allowing for weak ridging to move into the Quad State temporarily. High pressure and clear skies will make for a pleasant day with highs ranging from the low 60s in the Evansville Tri-state to near 70 for the Ozark foothills.
Cold front still on track to move through the region overnight.
322 AM CDT Tue Apr 21 2020 An upper trough is over the Great Lakes region and another weaker upper trough is over Southern California. The upper trough to the west will move over the Four Corners Region this afternoon with southwest winds over West Texas and southeast New Mexico. Temperatures today will be similar or slightly warmer than yesterday with highs mostly in the 80s and 90s. The upper trough will begin to move over the region tonight with a dryline across the Permian Basin and Lower Trans Pecos.
352 AM CDT Tue Apr 21 2020 Transient high pressure at the sfc today will shift to the southeast as low pressure moves in from the northwest.
/Today through Monday/ Surface front has cleared the state early this morning with cold advection across Iowa as thermal trof builds into the east early this morning. The passage of the high will initiate warm advection by this afternoon into tonight across the state. With the thermal trof settling into the east this morning, temperatures will be considerably cooler across the northeast today.
That being said, there will be elevated fire weather concerns today with the low RH.
324 AM CDT Tue Apr 21 2020 Early this morning northwest flow continued across the northern and central Plains while a broad trough was moving across southern California into Arizona. At the surface, high pressure was building into eastern Kansas at 07Z while weak low pressure was forming in the lee of the Rockies. Highs this afternoon are forecast to top out in the low to mid 70s with the warmer readings in central Kansas.
435 AM EDT Tue Apr 21 2020 High pressure will move away from the region this morning with a weak cold front crossing the region this evening.
18Z surface data has the cold front running from eastern Lake Superior west across central Minnesota and into North Dakota. A strong cold front will sweep through the area this evening. Precipitation should enter the highway 20 corridor west of Dubuque between 430 and 6 PM and then move quickly southeast and exit the area just before midnight. VFR conds through this taf cycle as high pressure tracks south of the area.
329 AM CDT Tue Apr 21 2020 High pressure over the northern Plains will move southeast into the mid Mississippi Valley today. The low level flow becomes nearly parallel to the thermal gradient by mid to late morning in our area, ending the cold advection by around noon. While temperatures will be cooler today, strong insolation across our area due to a virtually cloud-free sky combined with the lack of strong cold advection will only add up to a 3-5 degree drop from Monday's highs. The resulting cyclogenesis over northern Texas/southwest Oklahoma will turn the low level flow back to the south over the mid Mississippi Valley.
Large scale mid tropospheric pattern featured split flow across the CONUS, with a trough extend from up near the north pole down toward the Great Lakes region. There was a weak closed low embedded in that trough over Ontario. Farther west, a weak ridge at 500 mb was over WA/OR/ID and there was a loosely organized trough over CA.
343 AM MDT Tue Apr 21 2020 Midlevel ridging continues across the region today, with mild conditions expected again today.
High pressure slowly builds into the area from the north over the next 24 hours. Along the coast, developing east coast sea breeze should keep min RH values a little higher, in the low 40s.
610 AM EDT Tue Apr 21 2020 High pressure will move away from the region this morning with a weak cold front crossing the region this evening.
622 AM EDT Tue Apr 21 2020 Winds will increase today again behind a cold front with gusts above 30 mph likely from late morning into mid afternoon. Temperatures should dip below freezing where skies remain clear to partly cloudy.
Quiet weather will prevail in the wake of this system on FRI, with global models advertising another (mostly dry) front crossing the area FRI night, with dry high pressure prevailing for the weekend. 13 Light east to southeast winds will prevail today, becoming more modest tonight as high pressure departs to the east and an area of low pressure develops over the Texas panhandle. This onshore flow will strengthen further Wednesday and Wednesday night as this low tracks east across the Southern Plains.
The high-resolution guidance, HRRR, RAP, NAMNest do continue to show that north central Kansas and maybe the bottom row of counties in Nebraska could see some showers. During the day Wednesday a weak cold front will move across the forecast area, and some showers and thunderstorms may fire along the convergence boundary along the front during peak heating.
SFC cold front will push south through the area this morning into the early afternoon hrs. Some solutions keep the warm front from lifting north across SRN/Central AR until late Wed afternoon or even into the evening hrs. other solutions do lift the warm front further north and sooner in time.
There is a thin band of moisture associated with this trough that is currently producing showers across southwest Colorado. The instability combined with the weak lift from the trough will produce showers and a few thunderstorms this afternoon and evening.
408 AM CDT Tue Apr 21 2020 Today will begin with clear skies and calmer winds compared to yesterday as weak surface ridging briefly impacts the Northland. A low pressure dropping down from Saskatchewan will traverse over the Northern Plains and begin impacting MN this evening. It's associated warm front will push eastward bringing scattered rain showers that transition into light snow showers tonight. Strong WAA will filter in behind this system which may lead to some freezing rain pushing through the overnight hours and into Wednesday morning. Farther north will be a little cooler with highs in the 40s for the eastern portion of the Arrowhead.
Increasing high pressure will provide a gradual warming trend for the region for the remainder of the week with no precipitation in the forecast.
While highs today might be slightly cooler than yesterday afternoon in a few locations, full sun minus some spotty afternoon cumulus and light winds will provide a beautiful day.
Expect a warming trend with dry conditions for the remainder of this week due to high pressure building over the area. The warming trend will continue for the middle part of this week and beyond as high pressure builds inland over the region. High temperatures will once again reach at least a few degrees above average by Wednesday, or as warm as the lower 80s at the warmest locations. As we get closer to the weekend, temperatures will be even warmer.
Large scale mid tropospheric pattern featured split flow across the CONUS, with a trough extend from up near the north pole down toward the Great Lakes region. There was a weak closed low embedded in that trough over Ontario. Farther west, a weak ridge at 500 mb was over WA/OR/ID and there was a loosely organized trough over CA. Through Wednesday, the trough to our east will fill and the flow will flatten, while the trough to the west over CA moves toward KS and OK. Temperatures yesterday topped out in the lower 70s at most spots, due to deep mixing of the boundary layer and gusty northwest winds. For today, there will be just a bit more temperature variation, with highs in eastern NE generally in the lower and mid 70s, with upper 60s and lower 70s in southwest IA.
648 AM EDT Tue Apr 21 2020 A mostly dry cold front will move across the region today followed by high pressure for Wednesday.
Low pressure will track southeast along the stalling northwest to southeast oriented front on Wednesday. Meanwhile north of the front, southeast flow backing northeast late Wednesday will keep considerably cooler air in place. Highs may only reach the upper 40s or cooler in some spots in northwest WI if clouds and showers linger into the afternoon. The high temp gradient has been increased some, but as confidence continues to increase we'll probably be able to explicitly forecast 20+ degrees difference within a couple counties. The low is expected to head into southeastern MN during peak heating. Some surface-based CAPE per forecast soundings could spark a couple thunderstorms along the diffuse cold front.
SHORT TERM (Now through Wednesday): Low pressure swings through the Great Lakes today and a new low pressure system deepens across the southern Plains tomorrow. A cold front attempts a southern trek into Central Texas on Wednesday.
941 AM EDT Tue Apr 21 2020 Cold front has now pushed into south Florida with all associated rain with it. /issued 323 AM EDT Tue Apr 21 2020/ Broad troughing remains over much of the eastern part of the country while at the surface, low pressure has exited off the New England coast with its associated cold front still over south Florida. For today, high pressure will build in from the west, with rain chances coming to an end later this morning. Afternoon highs will still be warm, but the lower dew points should make it feel at least a bit nicer outside.
/issued 322 AM CDT Tue Apr 21 2020/ An upper trough is over the Great Lakes region and another weaker upper trough is over Southern California. The upper trough to the west will move over the Four Corners Region this afternoon with southwest winds over West Texas and southeast New Mexico. Temperatures today will be similar or slightly warmer than yesterday with highs mostly in the 80s and 90s. The upper trough will begin to move over the region tonight with a dryline across the Permian Basin and Lower Trans Pecos. Temperatures will cool into mostly the 80s on Wednesday as a result of the upper trough moving overhead.
Temperatures will be above normal again today, with afternoon highs in the upper 80s and lower 90s south of the stationary front and in the lower to mid 80s north of the front. In response to the approaching trough, the dryline will retreat westward this evening, with the front lifting back north as a warm front across North Texas. Convective development through the evening should be minimal, due to a strong capping inversion but thunderstorms will be possible primarily after 3 AM as the cap weakens with the approaching upper trough.
High temperatures will be coolest across the southwest 1/4 or so of the area (low to mid 60s) where cloud cover and precipitation chances are generally the highest. precipitation chances end from west to east during the day with dry conditions overnight as an upper level low pressure area moves away from the area.
632 AM CDT Tue Apr 21 2020 High pressure over the northern Plains will move southeast into the mid Mississippi Valley today. The low level flow becomes nearly parallel to the thermal gradient by mid to late morning in our area, ending the cold advection by around noon.
Now that we've seen this scenario for several days, bias-corrected grids are starting to pick up on trends of mixing warmer/drier than most raw models indicate, and have leaned heavily toward these BC grids with regard to temps and dew points today and Wednesday. This along with warmer temperatures does result in relative humidity levels falling near critical levels again Wednesday afternoon.
In the wake of this system, a NW flow pattern will be maintained over the Plains for the remainder of the forecast as ridging persists aloft over the western CONUS.
A cool air mass aloft associated with the trough will combine with daytime heating to destabilize the air mass. All shower activity is expected to end by mid evening as the current trough moves to the east. High pressure will take control of the southwest United States.
517 AM MDT Tue Apr 21 2020 Current upper level analysis has highly amplified flow with a trof across the eastern CONUS and a ridge over the west. At the surface, high pressure resides across the eastern Dakotas and Minnesota. Low pressure is located across southern Alberta and Saskatchewan with a lee trof across central Montana and Wyoming. Upper ridge will reside across the western CONUS for Today and Wednesday with quiet weather expected and above average temperatures.
857 AM EDT Tue Apr 21 2020 A mostly dry cold front will move across the region today followed by high pressure for Wednesday.
Weather conditions look relatively benign early this morning as calmer winds and a drier airmass have moved into the area behind yesterday evening's cold front. Observations show dewpoint depressions on the order of several degrees across the area, so not expecting much, if any, fog potential this morning given the lower dewpoints.
Low pressure will approach by Wednesday morning tonight with a chance for light snow and rain. Low levels will take a while to moisten up and evaporative cooling could overcome above freezing sfc temps to bring a period of light snow at the onset of the precip.
Broad upper level trof axis aligned over the Appalachians migrates eastward to off the east coast by tonight. At the surface, weak high pressure over the region Tuesday slides more eastward Tuesday night into Wednesday allowing for a more established southeast flow to develop and a return to boundary layer moisture by late in the day Wednesday. Overnight lows Tuesday night in the lower to mid 50s over the interior to the lower 60s closer to the coast.
619 AM CDT Tue Apr 21 2020 Updated for 12Z Aviation Discussion Today will begin with clear skies and calmer winds compared to yesterday as weak surface ridging briefly impacts the Northland. A low pressure dropping down from Saskatchewan will traverse over the Northern Plains and begin impacting MN this evening. It's associated warm front will push eastward bringing scattered rain showers that transition into light snow showers tonight. Strong WAA will filter in behind this system which may lead to some freezing rain pushing through the overnight hours and into Wednesday morning. Farther north will be a little cooler with highs in the 40s for the eastern portion of the Arrowhead.
622 AM CDT Tue Apr 21 2020 Transient high pressure at the sfc today will shift to the southeast as low pressure moves in from the northwest. Warm air advection will push in from the southwest as the edge of a ridge aloft increases heights today. So, temps will be a bit cooler across the west, but still above average with highs in the mid 60s to lower 70s.
That being said, there will be elevated fire weather concerns today with the low RH. Temperatures will remain around 5 to 10 degrees above normal on Wednesday with highs in the low 70s.
344 AM PDT Tue Apr 21 2020 A trough of low pressure over southern California will move east today with decreasing clouds west of the mountains. High pressure aloft will then strengthen near the West Coast bringing a warming trend.
Early this morning northwest flow continued across the northern and central Plains while a broad trough was moving across southern California into Arizona. At the surface, high pressure was building into eastern Kansas at 07Z while weak low pressure was forming in the lee of the Rockies. Highs this afternoon are forecast to top out in the low to mid 70s with the warmer readings in central Kansas. Lows tonight should cool into the lower 50s most areas. The system departs Wednesday evening as the mid level trough moves east into Missouri.
High pressure remains over western Montana and central Idaho today, leading to generally sunny skies and near to slightly above normal temperatures. Breezy afternoon winds are anticipated as high pressure begins to flatten ahead of the next weather system. The next system will begin to spread precipitation and breezy winds along a cold front into central Idaho and far northwest Montana Wednesday afternoon, and into the rest of western Montana by Wednesday evening. The highest precipitation amounts are still anticipated through central Idaho, where 0.