Aikyam-Lab/Synoptic-Bench huggingface dataset:
An upper low will move across the Pacific Northwest tonight into Monday morning for continued rain showers. An upper ridge begins to build offshore on Tuesday with troughing moving across British Columbia into mid week.
Chances will continue to be highest north of Pittsburgh and across the ridges. However, portions of NW PA and across the Laurel Highlands and Ridges will see temperatures cold enough to produce frost, and freezing temperatures in a few zones. Some light snow should mix in Monday morning across portions of the area, continuing through the day across the highest elevations. The center of the upper low is progged to drift southeastward toward southern Ontario by Tuesday. A few showers are possible with the low in close proximity, though weak low level ridging should limit this potential. With clearing skies and light wind, area temperatures will drop into the lower 30s and upper 20s Tuesday night.
344 AM EDT Mon Apr 24 2023 Northwest flow remains overhead as a pesky upper trough remains over the Great Lakes. Temperatures are below freezing in many areas.
118 AM EDT Mon Apr 24 2023 A trough will approach tonight into Monday, then slowly cross the region through mid week.
452 AM EDT Mon Apr 24 2023 A persistent upper level trough will keep unseasonably cool conditions across the region for the beginning of the week. There are some timing differences in this happening, so will hold off on issuing frost/freeze headlines further west until a better back- edge of potential below freezing temperatures can be finalized. Overall, low temperatures will again reach a few degrees on either side of the freezing mark, with the coldest readings across central Ohio where clear skies are likely all night. Northern stream will trough over the Great Lakes will retreat a bit allowing a southern stream system moving across the Plains to lift up the Ohio Valley.
Sharper low-level troffing will drop s across eastern Lake Superior overnight, and this may aid the development of a few -shsn late tonight to the e of Munising. Upper air pattern consists of a 500 mb closed low over western Ontario which will slowly meander around and then finally end up over the lower Great Lakes by 00z Thu. Diurnal nature to showers will continue into Mon night and then it finally dries out as the upper low moves to the east. Drying in the low levels under weak high pressure should result in VFR conditions at all terminals through 00Z Tue. As high pressure begins to build over Lake Superior this week, the wind will stay below 20 knots through Fri.
153 AM MDT Mon Apr 24 2023 A ridge axis will be over eastern Montana today. Meanwhile, an upper trough/low will move from the Pacific NW today to Utah and Colorado on Tuesday. NE Montana will have increasing clouds and warmer temperatures today. Precipitation with this low will be over central Montana today and move to southern Montana tonight and Tuesday.
345 AM EDT Mon Apr 24 2023 A persistent upper level trough will keep unseasonably cool conditions across the region for the beginning of the week. There are some timing differences in this happening, so will hold off on issuing frost/freeze headlines until a better back- edge of potential below freezing temperatures can be finalized. Overall, low temperatures will again reach a few degrees on either side of the freezing mark, with the coldest readings across central Ohio where clear skies are likely all night. Northern stream will trough over the Great Lakes will retreat a bit allowing a southern stream system moving across the Plains to lift up the Ohio Valley.
Cooler, drier air remains across the region through Tuesday.
With increasing/lowering clouds through the day, temperatures will be held down a bit with highs expected to top out in the low to mid 60s for most areas although far southeast KS may see highs in the upper 60s. Rain will persist over southern KS Wed night as the mid/upper trough translates eastward across northern OK. As the trough moves eastward into the Middle Mississippi Valley area on Thu we expect any lingering light rain to come to and end early in the period. We remain within a mean larger-scale trough which would support a continuation of near or below normal temperatures with most areas seeing highs in the low to mid 60s.
(Today) Nighttime Microphysics RGB satellite imagery has highlighted the bank of cloud cover that has lingered across the TN Valley overnight, keeping temps on the warmer side with temps as of 08Z in the 40s. Otherwise, for the rest of today, high pressure will slide further into the region and provide clearer skies and dry conditions. Daytime highs are expected to reach the low to mid 60s which is ~15 degrees below normal for this time of year.
A wave of low pressure will move from the Gulf this morning across central FL this afternoon. This wave will move off to the east this evening, with this area forming into an inverted trough over the coastal waters toward Tuesday morning. This trough will keep rain chances in the forecast near the coast overnight.
A freeze is also likely across the eastern Ozarks where several hours of at or below freezing temperatures are expected. Southeast winds (albeit light) should keep temperatures in the low to mid 30s generally for areas along and west of Highway 65. NBM probabilities of temperatures at or below freezing continue to be limited to portions of the eastern Ozarks where winds will be lighter.
333 AM EDT Mon Apr 24 2023 An upper low will maintain relatively cool conditions and periodic light rain chances through the first half of the week. This will likely result in areawide subfreezing overnight lows, so have hoisted a Freeze Watch for the region.
Generally looks to be a dry day until this afternoon and tonight as a digging closed mid level low rounds the western periphery of the stalled mid level trough. At the surface, ridging retreats to the southeast as a weak inverted trough extends northeast of a low that develops over southern Iowa into tonight. The best lift appears to come in tonight as the closed low/trough propagates southward from the UP down through Lake Michigan on eastward. Forecast RAP/NAM/GFS soundings show a tricky precipitation type forecast as much of the profile is below freezing, outside of the near surface layer. With it falling overnight, it appears that there's a brief window where some minor accumulations could occur, particularly in east central WI where the deeper forcing occurs from the trough.
High pressure continues to trek through the area as winds are mainly light/variable for most, with some locales in the east seeing westerly gusts around 20 mph at times. Going into Monday, an elongated trough sets up over the eastern Rockies, shifting east towards the CO/KS/NE border by the afternoon. By Tuesday, models still fairly consistent with bring a decent closed low at 500 mb southeast out of the Rockies, swinging into the Plains region south of the CWA. There continues to be positioning differences on current model runs as to how close the upper low comes to the southern CWA area.
143 AM EDT Mon Apr 24 2023 Cool, dry high pressure will build in from the northwest today then settle over the region Tuesday.
1043 PM CDT Sun Apr 23 2023 Satellite imagery shows a diurnal cumulus field across the region with an upper level low parked over the Minnesota/Canada border, leading to northwesterly flow across the region. For the overnight hours, in response to a broad area of low pressure developing off to our west, winds will become calm as they switch directions to become east- southeasterly. This will be occurring as the low pressure of to our west strengthens, which acts to increase our surface pressure gradient across the region. Wind gusts into the upper teens to mid 20s are expected, strongest across south-central SD, but on the plus side this will bring warmer temperatures leading to highs in the upper 50s and lower 60s. SW Minnesota unfortunately will be left on the cooler side with highs in the lower to mid 50s.
649 AM EDT Mon Apr 24 2023 A persistent upper level trough will keep unseasonably cool conditions across the region for the beginning of the week. There are some timing differences in this happening, so will hold off on issuing frost/freeze headlines further west until a better back- edge of potential below freezing temperatures can be finalized. Overall, low temperatures will again reach a few degrees on either side of the freezing mark, with the coldest readings across central Ohio where clear skies are likely all night. Northern stream will trough over the Great Lakes will retreat a bit allowing a southern stream system moving across the Plains to lift up the Ohio Valley.
653 AM EDT Mon Apr 24 2023 A trough of low pressure will approach today from the west, then slowly cross the region through mid week.
617 AM CDT Mon Apr 24 2023 (Today through Tuesday) Upper low remains over the Great Lakes this morning, with a northern stream trough moving into the Pacific Northwest.
Many Valley locations will reach the low 90s beginning mid-week. Flow will turn offshore tonight and Tuesday as the wave moves further to the east and ridging begins to build in from the eastern Pacific resulting in strong warming and breezy north to east winds. Ensemble guidance solidly advertises an amplifying upper-level ridge that will move overhead later this week.
Temperatures should climb well into the 40s for most locations; NBM and CAMs continue to bias temps rather cold, thus went with warmer guidance contained in NBM 90th and CONSMOS. Regardless, expect warmer temperatures at least.
(Rest of Today) A large area of high pressure continues to be centered to the north of the area this morning. Most guidance doesn't move the center of the high much today. Southern Middle Tennessee will likely be a bit cooler this afternoon, only reaching the upper 50s to lower 60s.
Temperatures should climb well into the 40s for most locations; NBM and CAMs continue to bias temps rather cold, thus went with warmer guidance contained in NBM 90th and CONSMOS. Regardless, expect warmer temperatures at least. River levels on most tributaries continue to decline with the exception of the lower Sheyenne River where prolonged crests or minor rises are still possible.
1033 AM EDT Mon Apr 24 2023 A broad upper level trough of low pressure centered over the Great Lakes will be the dominant weather feature across the Northeast through much of the week.
653 AM EDT Mon Apr 24 2023 A nearly stationary upper level low pressure system will remain over the region through midweek, bringing chilly conditions and scattered showers. After brief high pressure and drier conditions towards the end of the week, another upper level disturbance will bring showers back into the region this weekend. Upper level low pressure system will remain over the region through the period. A weak perturbations circles the upper low enters our area this afternoon and evening with more scattered showers. Can't rule out a few snow flakes across the higher elevations of the Catskills, but little to no accumulations are expected. Another weak wave wraps around the upper low on Tuesday, bringing increased shower chances once again during the afternoon. A deep upper level trough centered over southeast Ontario will slowly weaken and lift northeast.
557 AM CDT Mon Apr 24 2023 (Today) Nighttime Microphysics RGB satellite imagery has highlighted the bank of cloud cover that has lingered across the TN Valley overnight, keeping temps on the warmer side with temps as of 08Z in the 40s. Otherwise, for the rest of today, high pressure will slide further into the region and provide clearer skies and dry conditions. Daytime highs are expected to reach the low to mid 60s which is ~15 degrees below normal for this time of year.
311 AM MDT Mon Apr 24 2023 Weak upper ridging sits across the northern Great Plains, as the region is between the Great Lakes low and the approaching Pacific NW low.
527 AM CDT Mon Apr 24 2023 (Today through Tuesday Night ) Main H500 cyclone continues to rotate across the Great Lakes through the short term period providing persistent W-NW flow across the region. Sfc ridging nearly overhead will begin to shift northeastward toward the Ohio Valley. For today, mainly dry conditions are expected with highs topping out several degrees warmer than yesterday.
As the trough moves through the region on Tuesday, a few isolated showers and thunderstorms may develop.
Freezing conditions are no longer expected, so the Freeze Warning has been allowed to expire.
637 AM EDT Mon Apr 24 2023 An upper low will maintain relatively cool conditions and periodic light rain chances through the first half of the week. This will likely result in areawide subfreezing overnight lows, so have hoisted a Freeze Watch for the region.
Another warm day is in store Monday before a cold front drops into the region Tuesday with cooler and breezy conditions expected. The cooldown will be brief as high pressure quickly rebuilds and temperatures climb well above normal by late week and continue into the weekend.
955 AM CDT Mon Apr 24 2023 We had a frosty start to the day across Middle Tennessee and many areas had brief freezing temperatures around daybreak.
At the surface, the cold front associated with this departing system is draped along the Gulf Coast. As high pressure builds farther southward through the lower levels, mesoanalysis fields show weak cold air advection and some lower-level and mid-level frontogenesis sloping back to the north under the favorable jet dynamics.
Slightly cooler through tonight as a weak system moves through.
1022 AM EDT Mon Apr 24 2023 High pressure slowly returns to the mid-Atlantic region from late today into Tuesday. Secondary cold front now off the coast. High pressure moves over the area on Tuesday with zonal flow aloft. Low pressure begins to take shape over the southern plains Tuesday night. Dry locally, however, with lows generally in the low 40s inland and upper 40s to low 50s near the coast.
Northwest flow remains overhead as a pesky upper trough remains over the Great Lakes. Temperatures are below freezing in many areas.
In fact a good majority of the area will drop down in the 40s, with just a few spots in the southeast remaining in the low 50s.
449 AM PDT Mon Apr 24 2023 A low pressure system moving southeastward through the Great Basin will bring deepening of the marine layer and cooling for the coast and valleys today and slight cooling for the mountains and deserts on Tuesday.
530 AM EDT Mon Apr 24 2023 An upper low will maintain relatively cool conditions and periodic light rain chances through the first half of the week. This will likely result in areawide subfreezing overnight lows, so have hoisted a Freeze Watch for the region.
Otherwise the forecast for today remains on track for a slightly warmer and slightly breezy day, along with dry conditions. Overall look for a dry and breezy day with slightly warmer temperatures. A brief ridge of high pressure will be found overhead on Tuesday, although the surface gradient may be increased enough to bring more breezy winds.
RW (Today through Tuesday) Upper low remains over the Great Lakes this morning, with a northern stream trough moving into the Pacific Northwest.
1020 AM EDT Mon Apr 24 2023 A trof will approach from the west through tonight, then slowly cross the region through mid week.
910 AM EDT Mon Apr 24 2023 Issued 910 AM EDT Mon Apr 24 2023 Surface temperatures have steadily increased since sunrise with current values well above freezing per the latest KY Mesonet readings. Northwest flow remains overhead as a pesky upper trough remains over the Great Lakes. Temperatures are below freezing in many areas.
916 AM EDT Mon Apr 24 2023 A persistent upper level trough will keep unseasonably cool conditions across the region for the beginning of the week. There are some timing differences in this happening, so will hold off on issuing frost/freeze headlines further west until a better back- edge of potential below freezing temperatures can be finalized. Overall, low temperatures will again reach a few degrees on either side of the freezing mark, with the coldest readings across central Ohio where clear skies are likely all night. Northern stream will trough over the Great Lakes will retreat a bit allowing a southern stream system moving across the Plains to lift up the Ohio Valley.
An upper low is moving across the Pacific Northwest this morning for continued isolated showers through today.
1036 AM EDT Mon Apr 24 2023 A persistent upper level trough will keep unseasonably cool conditions across the region for the beginning of the week. There are some timing differences in this happening, so will hold off on issuing frost/freeze headlines further west until a better back- edge of potential below freezing temperatures can be finalized. Overall, low temperatures will again reach a few degrees on either side of the freezing mark, with the coldest readings across central Ohio where clear skies are likely all night. Northern stream will trough over the Great Lakes will retreat a bit allowing a southern stream system moving across the Plains to lift up the Ohio Valley.
In these same spots, temps fell into the low-mid 20s. Tonight, the trough drops through the eastern UP, allowing northeasterly flow to spread showers westward into Marquette County. The south and east may be able to break out into the low 40s.
920 AM EDT Mon Apr 24 2023 A nearly stationary upper level low pressure system will remain over the region through midweek, bringing chilly conditions and scattered showers. After brief high pressure and drier conditions towards the end of the week, another upper level disturbance will bring showers back into the region this weekend. Upper level low pressure system will remain over the region through the period. A weak perturbations circles the upper low enters our area this afternoon and evening with more scattered showers. Can't rule out a few snow flakes across the higher elevations of the Catskills, but little to no accumulations are expected. Another weak wave wraps around the upper low on Tuesday, bringing increased shower chances once again during the afternoon. A deep upper level trough centered over southeast Ontario will slowly weaken and lift northeast.
603 AM CDT Mon Apr 24 2023 (Today and tonight) Expect another cloudy and cool day across West Central Texas today, although a bit warmer than what we saw yesterday. Extensive cloud cover will help to keep temperatures from getting much higher than the low to mid 60 at most locations. Cloudy conditions will continue overnight, with low temperatures in the low to mid 50s.
410 AM CDT Mon Apr 24 2023 Overall look for a dry and breezy day with slightly warmer temperatures. A brief ridge of high pressure will be found overhead on Tuesday, although the surface gradient may be increased enough to bring more breezy winds.
440 AM MDT Mon Apr 24 2023 Weak upper ridging sits across the northern Great Plains, as the region is between the Great Lakes low and the approaching Pacific NW low.
High pressure will build over the Western U. While most locations will get gusts into the low 30 MPH range, the Waterville Plateau and Blues could see gusts into the 40 MPH range. There is a very small chance for an isolated thunderstorm in the lower Idaho Panhandle during the afternoon.
425 AM MDT Mon Apr 24 2023 Upper level low over Washington state will drop southeast into central Idaho today and into southwest Wyoming Tuesday morning. To the north and east of this track there will be good QG forcing and divergence aloft to go along with increasing instability in the mid levels as the cold pool aloft associated with the low arrives. Outside of the mountains and foothills these precipitation chances will be in the 20 to 40 percent range and precipitation amounts will trend lower quickly through the late morning into the afternoon as the upper low moves into Colorado. Expect high temperatures to range from the lower 50s along the southern and far eastern border areas, to the lower 60s from the Musselshell river valley east into Custer county.
Winds and seas should somewhat decrease further through the afternoon as high pressure continues to settle in. Otherwise, mainly cloudy skies due to mid and upper level clouds through the day with temperatures a little cooler than seasonal norms.
The inversion in the Lower Keys hasÂ limitedÂ the initiation of convection.
After this mayhem passes by Tuesday mid-day, upper level ridging dominates, so expect clear to mostly clear skies and strong warming from Tue to Wed, with afternoon highs in the 60s for the Snake River plain and even places as far north as Challis.
710 AM EDT Mon Apr 24 2023 A broad upper level trough of low pressure centered over the Great Lakes will be the dominant weather feature across the Northeast through much of the week.
An upper low and trough will move from the Four Corners area toward the southern High Plains, and a subtle disturbance out ahead of it will move across much of Texas. Temperatures will be 10-20 degrees warmer than today. Afternoon highs will range from the lower 70s in our far eastern counties, to the mid 80s in the western Concho Valley.
Warmer than normal temperatures are expected across the region today. A cold front will move through the region tomorrow, resulting in breezier conditions and temperatures cooling back down to seasonal values. This cooldown will be brief as high pressure quickly rebuilds and temperatures climb well above normal by late week and continue into the weekend.
The back side of a mid- level trough will exit the region into tomorrow, with a brief period of ridging providing a break from impactful weather.
Issued 910 AM EDT Mon Apr 24 2023 Surface temperatures have steadily increased since sunrise with current values well above freezing per the latest KY Mesonet readings. Northwest flow remains overhead as a pesky upper trough remains over the Great Lakes. Temperatures are below freezing in many areas.
Showers will gradually spread across eastern OK this evening, and eventually into northwest AR later tonight, initially having to overcome a relatively dry airmass in the lower levels.
A significant warming trend will occur Tuesday through the weekend as high pressure builds, taking afternoon highs well above normal. A few high clouds are depicted on satellite imagery at this time along with a ridge of high pressure centered over the eastern Pacific Ocean off the CA coast. Today warmer than average temperatures will occur, though more seasonable, compared to what's coming later this week. Much warmer temperatures are in store by the middle of the week and beyond due to the building ridge of high pressure over our area. Ensemble guidance has been consistently showing this developing pattern, although forecasts have been trending warmer with each run.
1239 PM CDT Mon Apr 24 2023 (Today through Tuesday) Upper low remains over the Great Lakes this morning, with a northern stream trough moving into the Pacific Northwest.
Key Messages: *Seasonably cool today in the 50s *Rain likely for parts of the area tonight Today: After a cold start in the mid 20s to lower 30s, filtered sun will allow temps to rebound into the low 50s north to upper 50s south. Then high pressure will build in from the NE along with a drier air mass and clearing skies into the evening/overnight.
High pressure centered over the Ohio River Valley will continue to settle into the forecast area today. This will result in another day of overall pleasant conditions across the CWA as a cooler drier resides across the region. At the surface, the cold front associated with this departing system is draped along the Gulf Coast. As high pressure builds farther southward through the lower levels, mesoanalysis fields show weak cold air advection and some lower-level and mid-level frontogenesis sloping back to the north under the favorable jet dynamics.