Aikyam-Lab/Synoptic-Bench huggingface dataset:
1253 AM EDT Sat Apr 4 2020 High pressure continues to provide dry weather today. Weak cold front crosses on Sunday. A high pressure system will provide dry weather again today. A cold front will then move into the area from the west Saturday night. Chances for rain showers will be on the increase Saturday night into Sunday from west to east as a weakening cold front approaches the region. 90 inches ahead of the cold front, but limited upper support should result in nothing more than some light scattered rain showers Sunday morning into the afternoon. Any precipitation on Sunday should taper off Sunday night as high pressure in the Great Lakes builds in.
239 AM EDT Sat Apr 4 2020 High pressure continues to provide dry weather today. Weak cold front crosses on Sunday. A high pressure system will provide dry weather again today. A cold front will then move into the area from the west Saturday night.
Forecast Confidence is high: Showers will exit the east by around daybreak this morning, with skies then clearing west to east this morning into early afternoon as high pressure begins to build in from the west. Though it will be cooler behind the cold front, highs should still get up to around normal with plenty of sunshine expected by afternoon. Winds will become onshore in the east by afternoon, so expect it to be cooler near the lake. Mostly clear skies will continue for tonight and Sunday under the high. Highs Sunday will warm back above normal away from Lake Michigan, with onshore winds keeping it cooler near the lake once again.
1235 AM EDT Sat Apr 4 2020 A ridge of high pressure will remain in control across the region through tonight. A weak cold front will move across the area late Saturday and Saturday night High pressure will build across the region Sunday and Sunday night.
A cold front will slowly move through the state tonight but the drier air will lag behind quite a bit. Tonight Through Sunday Night The latest surface analysis shows a low pressure system and a cold front along the western border of Arkansas. The system and cold front will track to the southeast through the state tonight and Saturday and eventually stall over eastern and southern AR by early Sunday.
Weak ridging continues to dominate the area through tomorrow. Lows tonight will fall into the mid 50s with highs tomorrow in the low to mid 80s, both above normal. The ridge will be flattened during this period with embedded short wave impulses moving through it across the Gulf Coast region. Temperatures will be warm with Sunday's highs in the lower to mid 80s.
1020 PM MDT Fri Apr 3 2020 The cooler area of high pressure in place at the surface over the central High Plains region today slides off to the east over the weekend with a trough of lower pressure deepening in the lee of the Rockies by Sunday. Broad west to southwest upper flow will provide some weak short wave ridging over the forecast area through the weekend. Upper ridging will result in warm and dry conditions to start the period.
Snow showers along a cold front should mostly stay north of the TAF sites this morning.
There may be an increasing threat for MVFR category ceilings to build into western/southern portions of the area later tonight, but until then, high pressure is making it tough for the lower levels to moisten up. For the most part, the weather pattern continues to be influenced by ridging centered over the ArkLaMiss region. Anticyclonic flow and virtually non-existent low level moisture transport along/ahead of an approaching cold front will continue to help limit rain chances for most of the forecast area, but it appears as the front moves slowly in the Delta region, there will be enough moisture convergence and ascent to bring a few showers in the near term.
541 AM CDT Sat Apr 4 2020 248 AM CDT Currently, the Great Lakes are positioned beneath a sharp upper- level ridge ahead of a large area of upper-level cyclonic flow across much of the western United States. A cold front continues to sweep through the western Great Lakes with satellite imagery depicting an expansive area of stratus through much of Wisconsin, southeastern Minnesota, and Iowa. As such, highs today will range from the lower 40s along the lakeshore, 50 in the Chicago suburbs, and mid-50s west of US-47. A few passing high clouds and light easterly winds overnight will do little to prevent temperatures from dropping into the low to mid 30s, likely leading to patchy frost. Sunday is poised to be a repeat of Saturday except with highs a few degrees warmer (save along the lakeshore once again).
654 AM CDT Sat Apr 4 2020 (Today and tonight) Overall, warmer today with decrease in cold air advection and thinning/decreasing cloud cover all but perhaps southeast parts of Oklahoma. By this evening, southerly flow will return and erosion of cooler airmass will be apparent. Lows tonight are forecast to be 5 to 10 degrees less cold Sunday morning with no expected threat of freezing temperatures.
This cloud layer will continue at least into the early afternoon, then should scatter out by mid afternoon before lowering again tonight as a cold front slowly approaches.
546 AM EDT Sat Apr 4 2020 High pressure continues to provide dry weather today. Weak cold front crosses on Sunday. A high pressure system will provide dry weather again today. A cold front will then move into the area from the west Saturday night.
A light northwest flow will prevail through the day, which will hold temperatures closer (but still warmer) to average despite plenty of sunshine. Large-scale subsidence will follow in the wake of the aforementioned trough and cold front.
The front is not xpcted to translate much to the east later today, leaving a weak upper ridge axis in place over the cntrl Gulf region. The short-term period will be characterized by a more summer-like pattern with increasing ridging aloft and no strong synoptic features tracking into the region. Convective temperatures in the low 70s will be realized tomorrow afternoon, leading to the development of showers. While the mid-level ridge axis remains situated over the lower Mississippi Valley and strengthens due to a cutoff low digging down the West Coast, the low-level ridge shifts more over the Florida Panhandle.
/Today through Sunday/ We are cloudy and cool in Texas as the cold front continues to drift Eastward over Toledo Bend. A 1028mb high pressure center is elongated N to S and is sprawling Eastward a bit over the MS river. Most temps over our W half of our cwa are in the low to upper 40s for SE OK and E TX. Meanwhile, all of our parishes are in the low to mid 60s with calm or light N/NE wind showing up. Partly sunny and much less shower activity expected for Sunday with a more zonal flow aloft, even ridging Northward a bit by late in the day.
611 AM CDT Sat Apr 4 2020 A cold front will depart to the east this morning, bringing noticeably cooler air. The cold front has reached the Indiana border as of 230 am CDT, with brisk northwest winds in its wake ushering in much cooler air. Temps will approach freezing in our western counties by sunrise this morning, with wind chills in the 20s. High pressure tonight will provide mostly clear to partly cloudy skies and light northeast winds, setting the stage for low temps to dip into the mid to upper 30s. Sunday will be dominated by dry high pressure, and a gradual shift in winds from NE to E-SE late in the day.
A weak cold front will continue to push southeast in TN this morning. High pressure will begin to build in behind the sfc boundary this afternoon.
That will set up a 100% sunny day today as very dry air and high pressure build in. The high will slowly head east this weekend and by late Sunday it should be situated over the Great Lakes.
721 AM EDT Sat Apr 4 2020 As an offshore low pressure system moves out to sea tonight, the rainy pattern of the last few days will come to an end. May see some patchy drizzle and mist lingering tonight, but high pressure building in Saturday will bring increasing sun and warmer temperatures.
419 AM CDT Sat Apr 4 2020 A well defined cold front presently extends from near Shreveport south to just west of Beaumont this morning with an approximately 15 degree temperature gradient being observed between Jasper and Lufkin. Still, light northerly winds are expected to advect enough cooler air into the region to see overnight lows a few degrees cooler tonight than are being presently observed.
If skies clear sooner than anticipated, then high temperatures may trend even warmer and closer to 80. The short-term period will be characterized by a more summer-like pattern with increasing ridging aloft and no strong synoptic features tracking into the region. Convective temperatures in the low 70s will be realized tomorrow afternoon, leading to the development of showers. While the mid-level ridge axis remains situated over the lower Mississippi Valley and strengthens due to a cutoff low digging down the West Coast, the low-level ridge shifts more over the Florida Panhandle.
Radar indicates some shower activity across southeast Utah and southwest Colorado but webcams and observations would appear to indicate roads remaining dry, so thinking this moisture is falling at the higher peaks and having a tough time reaching the valleys and passes due to drier low levels as indicated by KGJT 00Z sounding. Showers become isolated by afternoon with some convective buildups possible over the higher terrain. However, southwest flow will provide warmer conditions today as warm air advection takes hold this afternoon.
These will cap at the lower 80s, while the interior will see temps in the mid- upper 80s.
The low levels will be a little slow to warm with lack of lee troughing, but we should still reach the 55 to 60 degree range across the plains. Dry weather and mild temperatures are expected for much of the upcoming week as a combination of upper level ridging and moderate southwest flow aloft covers the state.
For the most part, the weather pattern continues to be influenced by ridging centered over the ArkLaMiss region. Anticyclonic flow and virtually non-existent low level moisture transport along/ahead of an approaching cold front will continue to help limit rain chances for most of the forecast area, but it appears as the front moves slowly in the Delta region, there will be enough moisture convergence and ascent to bring a few showers in the near term.
315 AM MDT Sat Apr 4 2020 Temperatures this morning have remained 20-30 degrees warmer than this time yesterday with most sites in the 20s. 700 mb temperatures have been steadily climbing with the passing of the upper level trough yesterday and will continue to increase through the day.
530 AM MDT Sat Apr 4 2020 Temperatures this morning have remained 20-30 degrees warmer than this time yesterday with most sites in the 20s. 700 mb temperatures have been steadily climbing with the passing of the upper level trough yesterday and will continue to increase through the day.
The forecast period begins with an upper trough over the High Plains and and southwest flow aloft over the Central High Plains. High temperatures will be several degrees below normal, ranging from the low 50s in the eastern part of the region to the upper 50s in Eastern Colorado. A weak ridge will move over the region on Sunday.
Otherwise, it will be a dry day underneath building ridge, with some post- frontal breezy NW winds, especially in our east. JKL The upper low and trough that brought the cold temperatures across the forecast area the past few days will shift east of the state this afternoon. This will allow upper level ridging and a southwest flow aloft to build over the state later this afternoon continuing through Sunday. However, a weak cold front will move across the forecast area today.
Today Through Sunday Night An upper ridge continues over the mid south into the midwest with an upper low moving into the Plains. The upper ridge will move east today and the upper low will move east into the Great Lakes. Upper ridging returns to the mid south for Sunday. The cold front will stall in or near southeast Arkansas tonight. As a warm front approaches from the west Sunday, rain chances will increase once again.
1028 AM EDT Sat Apr 4 2020 Weak high pressure will build in from the Ohio Valley through Sunday morning.
Faster zonal flow from the west coast through the Northern Plains will result in a weak H5 trough over the northern Rockies to race east along the Canadian border today. Its weak surface reflection trough will be moving through Montana with an increasing south wind ahead of it through the Dakotas. As has been consistent in the forecasts, it still looks like the only risk for a shower, and in this case rain today, will be nearer the mid level lifting trough, so in northwest North Dakota. Warmer today with highs held in the 30s over the deeper snow pack of the east, where warm air advection is weaker, to the mid 40s western third.
933 AM EDT Sat Apr 4 2020 High pressure continues to provide dry weather today. Weak cold front crosses on Sunday. A high pressure system will provide dry weather again today. A cold front will then move into the area from the west Saturday night.
/issued 419 AM CDT Sat Apr 4 2020/ A well defined cold front presently extends from near Shreveport south to just west of Beaumont this morning with an approximately 15 degree temperature gradient being observed between Jasper and Lufkin. Still, light northerly winds are expected to advect enough cooler air into the region to see overnight lows a few degrees cooler tonight than are being presently observed.
555 AM CDT Sat Apr 4 2020 Faster zonal flow from the west coast through the Northern Plains will result in a weak H5 trough over the northern Rockies to race east along the Canadian border today. Its weak surface reflection trough will be moving through Montana with an increasing south wind ahead of it through the Dakotas. As has been consistent in the forecasts, it still looks like the only risk for a shower, and in this case rain today, will be nearer the mid level lifting trough, so in northwest North Dakota. Warmer today with highs held in the 30s over the deeper snow pack of the east, where warm air advection is weaker, to the mid 40s western third.
540 AM MDT Sat Apr 4 2020 Weak ridging will set up across the western part of the state today as a trough sweeps by to the north. Thermal ridging strengthens across the state as well, with H7 temps 4 to 6 degrees C higher this afternoon and 8 to 10 degrees C tomorrow. The only weather impact noted is from the effects of a trough dropping down the west coast this weekend. Southwest flow continues across the forecast area Sunday night with the strong closed low off the coast of northern California and a trough digging into the west from Canada.
The rainfall and cloud cover will help hold temperatures in the low to mid 70s in our west but upper 70s to near 80 degrees is still expected in the east this afternoon. For the most part, the weather pattern continues to be influenced by ridging centered over the ArkLaMiss region. Anticyclonic flow and virtually non-existent low level moisture transport along/ahead of an approaching cold front will continue to help limit rain chances for most of the forecast area, but it appears as the front moves slowly in the Delta region, there will be enough moisture convergence and ascent to bring a few showers in the near term.
1031 AM EDT Sat Apr 4 2020 High pressure building into the North Country this afternoon will bring increasing sun and temperatures close to seasonal levels for early April. A weakening cold front will move through on Sunday, with little impact other than a few scattered showers.
Temps should be a notch warmer for many locations Mon aftn, but some clouds should return from the SW by the end of the day.
548 AM CDT Sat Apr 4 2020 Big ridge of high pressure at the surface will be the predominant influencer of weather across the area for the remainder of the weekend. As a result temperatures have dropped below freezing for this morning, however low stratus has helped keep temperatures a little more palatable. Mid level ridging will help keep conditions dry and on the upward trend for temperatures.
The western FA is looking to get into the low 60s while the east only gets into the upper 50s this afternoon.
Expect rain chances to decrease this afternoon with the cold front near the Louisiana border. Today Through Sunday Night An upper ridge continues over the mid south into the midwest with an upper low moving into the Plains. The upper ridge will move east today and the upper low will move east into the Great Lakes. Upper ridging returns to the mid south for Sunday. The cold front will stall in or near southeast Arkansas tonight. As a warm front approaches from the west Sunday, rain chances will increase once again.
A weak frontal boundary remains just west of NW AL from the OH Valley SW into the lower MS Valley. Latest nwp guidance has the front generally stalling near it's present location, leaving a weak upper ridge axis in place across the cntrl Gulf region. With NNE winds diminishing this evening, overnight lows again look to fall mainly into the lower 50s, fairly consistent with lows this morning. Lingering rainfall should then diminish by Sun evening, as the front gradually moves more to the SE, with lows early Mon again trending in the lower/mid 50s. The sfc boundary will then double back to the north Mon as a warm front, leaving some weak synoptic lift in place across the area.
Temperatures across Northeast Arkansas are in the lower to mid 50s behind the front, while across North Mississippi temperatures are in the mid 60s to near 70 degrees.
The low stratus may not begin to clear out on the caprock by early afternoon with areas off the caprock remaining in overcast skies for much of the afternoon.
The frontal boundary is expected to become more diffuse through Sunday before eventually lifting back northward as a warm front late in the day and especially overnight. Highs should generally average near 70 degrees, slightly warmer across our southern zones and a bit cooler farther north.
With the low-level ridge moving to the east and southerly flow redeveloping, we will be advecting more moisture and more clouds back into the area overnight.
Otherwise southeast to turn a bit more south-southeast tonight as warmer air does move in. But in the thicker snowpack kept highs on the lower side of guidance, in the low 40s. Temps do look to stay warmer than 32F during the precipitation.
Overall, upper level ridging will maintain its hold over the Gulf of Mexico and the northern Gulf coast through the weekend. Closer to the surface, high pressure will be located over the east coast, while a cold front over the Ohio Valley extending down through the ARKLATEX region moves eastward. Temperatures are in the lower to mid 70s so far early this afternoon, with highs in the lower to mid 80s still expected today. Lows tonight will be above the seasonal norm, as temperatures only decrease to be in the lower 60s over the inland areas and to the mid 60s along the coast. Highs tomorrow will then be in the lower 80s.
The 12z KEY sounding says it all, with the lower of two subsidence inversions based near 2,600 feet MSL. The supporting impulse will ride east across the north-central Gulf today and tonight, along the periphery of a flat but slowly amplifying upper ridge axis near 90W. The impulse will then take a turn to the east- southeast on Sunday on the downstream side of the ridge axis along a warm front that will develop across South Florida. A high pressure ridge now stretching from the upper Ohio Valley to northeast Florida will emerge off the U.
With a healthy amount of sunshine, temperatures have surged into the low 70s this afternoon.
152 PM EDT Sat Apr 4 2020 High pressure continues to provide dry weather today. Weak cold front crosses on Sunday. A weak cold front, whose energy reside well to the north over northern Ontario and northern Quebec, will continue to weaken as it pushes into the middle Ohio Valley late tonight and Sunday. The chances will linger due to weak low pressure at the surface developing along the front thanks to a weak wave in the flow aloft.
Once this transpires, a warm front will move north overnight, resulting in patchy fog developing across the lowlands. The warm front will continue pushing north during the day, w/isolated t- storms possible along/east of this feature.
Some areas of south central MO were in the low 40s.
1129 AM MDT Sat Apr 4 2020 Temperatures this morning have remained 20-30 degrees warmer than this time yesterday with most sites in the 20s. 700 mb temperatures have been steadily climbing with the passing of the upper level trough yesterday and will continue to increase through the day.
259 PM CDT Sat Apr 4 2020 For tonight, we expect low pressure and an associated warm frontal boundary to move east from Montana through North Dakota. This will be the focus for small chances of rain and snow showers across south central North Dakota ahead of the warm front, and across north central North Dakota, along the trough axis of the low. On Sunday, a redeveloping lee side low pressure in Montana will quickly return a southerly flow of air into the region.
145 PM EDT Sat Apr 4 2020 High pressure will remain over the region through tonight ahead of a short wave that will move along the northern Gulf coast region on Sunday.
SHORT TERM (Now through Sunday night): A cold front has pushed to the coast with moderate northeast winds and a few lingering showers in its wake.
The surface pressure gradient was strengthening over eastern Colorado into far western Kansas due to a developing low pressure trough in the lee of the Rockies. The increasing south to southwest flow will continue to modify the lower levels through tonight and Sunday. By Sunday afternoon, a warm front will be pushing north into western Kansas as low pressure develops over eastern Colorado. Temperatures to the south and west of the warm front should be able to climb well up into the 70s. During the first part of the week, an upper level low pressure system off the coast of northern California is expected to continue moving south just off the coast. East of this feature, upper level ridging will build over the central Plains.
Broad surface ridging continues across Central Alabama this afternoon with dry air in place and warm temperatures. 1000-850mb thickness values support even warmer afternoon highs on Sunday and most locations should top out in the low to mid 80s. /Episodes of precipitation expected during the week followed by cooler air/ At the start of the period (00z/7p Sunday), a broad H5 ridge is progged atop the Southeast U. as an upper low digs along the southern Pacific Coast.
This should allow for areas along and southeast of the KS Turnpike to remain above freezing. Elsewhere, lows should hover near freezing, but based on partner input, vegetation across this area is less susceptible to a frost/freeze.
Meanwhile, temperatures have held steady in the lower to mid 40s this afternoon given the cloud cover and rain.
Went ahead and rain with slight chance mentionables this evening/overnight, when high pressure easing into Great Lakes slips a little drier air down the Wabash River, which should shut the pops off later tonight or early tmrw.
The lowest ceiling expected during the period will be around ten to twelve thousand feet.
150 PM MDT Sat Apr 4 2020 Digging western CONUS trough is supporting downstream upper level ridging over the Northern Plains with SW mean flow developing. This has supported warmer conds, with many locations seeing temps in the 50s. Small theta-e ridge (evident at h7) will support widely ISOLD convection, which will begin as sfc based convection in WY, transitioning to elevated convection per sustained LLJ over scentral SD. Much warmer conds expected Sunday, with manly places see 60s for highs.
239 PM CDT Sat Apr 4 2020 239 PM CDT High pressure has become established across the upper Midwest this afternoon, with increasing surface pressure and dry advection slowly working to erode stratus clouds from the northwest.
Weak high pressure over the region will continue a brief dry period into this evening. A mix of sun and clouds will continue, with a few showers possible over the higher terrain.