Aikyam-Lab/Synoptic-Bench huggingface dataset:
232 AM EDT Sun Sep 5 2021 A cold front will be roughly along the Ohio River at the start of the Short Term this morning. Low temperatures will range from the mid 50s in southern Indiana to the lower 60s in southern Kentucky. A sfc cold front will have cleared the CWA by Monday morning and will continue to sag across the Southeast. The lagging upper level trof axis follows suit and swings east of the area Monday afternoon.
Temperatures will on Sunday be near seasonal average for early September, and a bit warmer on Monday. That will set the stage for a day of full sun with highs in the low 70s north, and upper 70s south. On Monday southerly winds will increase ahead of the next low pressure system, and that will bring slightly higher temperatures with afternoon highs in the 80s out west and mid to upper 70s elsewhere.
211 AM MDT Sun Sep 5 2021 The main story for the next few days is really the ridge building in over the Great Basin, which will dominate the weather for eastern Utah and western Colorado, keeping things dry and warm.
Although the center of 500 mb high pressure will relocate from Louisiana to Nevada as closed 500 mb low pressure moves north into the Gulf of Mexico, the mid-level ridge will remain the dominant feature over the BRO CWFA.
324 AM EDT Sun Sep 5 2021 High pressure over the Carolinas will drift offshore today. A cold front will weaken while settling southeast across the region tonight and Monday. Water vapor satellite showed a weakening ridge across the lower Mississippi Valley, and a trough across the Ohio Valley, with west to northwest flow aloft across central North Carolina. Additionally, a cold front will dig southeast across the Ohio Valley today, arriving along the Carolina foothills by late tonight. Conditions are expected to remain dry across the region today, then a slight chance of showers is possible late tonight near the Triad as the cold front approaches the region and precipitable water values increase to near 1.
235 AM MDT Sun Sep 5 2021 The period starts with northwesterly flow as an amplifying ridge over the western CONUS begins to take shape. Sunday, looks to be warmer as effects from the ridge over the western CONUS approaches the high plains. Behind the dryline near critical fire weather is expected with RH values bottoming out in the lower teens.
/Issued 938 PM CDT Sat Sep 4 2021/ Cold front continues to push across the region this evening with a broken line of convection that currently extends from SE OK through WC AR. Scattered showers and thunderstorms will continue overnight along and north of a cold front pushing south across the area. Scattered showers/thunderstorms will continue to move south through the remainder of eastern Oklahoma/northwest Arkansas overnight as the cold front slowly pushes into far southeast Oklahoma by Sunday morning.
313 AM CDT Sun Sep 5 2021 Water vapor imagery shows an upper impulse tracking across west- central Nebraska with a deep upper low centered over north-central Ontario. At the surface, high pressure is centered over eastern Nebraska/northeast KS. Northwest flow aloft will be in place by this evening with a strong area of high pressure situated over the Central Great Basin. This feature will allow a cold front to surge through the forecast area on Tue into Tue evening. By Wed, deep upper trough is expected to stretch from Ontario through the Great Lakes and into the Ohio Valley. Meanwhile, upper ridging will expand across the Desert Southwest and across the Southern Plains. ECMWF and GFS start to diverge in their solution by Sat with the GFS much more agressive with an upper trough compared to the ECMWF.
An upper level trof will amplify over the eastern CONUS downstream of an anomalously strong upper ridge over the North American Rocky Mountains.
This has resulted in the reformation of scattered showers and single-cell thunderstorms along a theta-e axis across portions of the low Rolling Plains. The ongoing convection across the low Rolling Plains should continue for the next few hours before updrafts are entrained by dry air and as the post-frontal boundary-layer reaches peak stabilization. Surface temperatures will be notably cooler today compared to the last several days as well due to weak east/northeasterly flow, ranging from the upper 70s near the Texas/New Mexico state line into the upper 80s in the Rolling Plains.
Another disturbance associated with a weak cold front will pass across the area on Sunday. High pressure will build in for the early part of the week. A cold front will move in behind the exiting mid level disturbance on Sunday. Temperatures will range from the lower to mid 70s in the southeast (more clouds) to the upper 70s to near 80 in the northwest (more sun). Drier and cooler air will filter in overnight.
There is an area of low pressure working from sern Montana down through western South Dakota. The high begins to get pushed eastward Sunday night as a low pressure trough approaches from the west. Low temperatures tonight will be in the 50s, with high temperatures ranging from the lower 70s east to the lower 80s west on Sunday. The period begins on Monday with an area of low pressure and associated frontal boundaries crossing the region. A cold front should sweep across the region Monday night, bringing gusty northerly winds and a low potential for pcpn. Ridging aloft should slowly build into the region at the end of the work week with temps warming above normal.
/NF/ Expect dry weather overnight as high pressure ridging remains in control. Some locations have held onto the lower 70s. Dry weather will continue this evening into tonight as the upper ridge remains in place. Elsewhere, highs will be in the lower to mid 90s.
Upper level ridging remains centered over the Lower Mississippi River Valley this evening. On Sunday the upper ridge shifts south over the forecast area. The upper ridge begins to break down late in the weekend with the approach of an upper level trough digging southeast across the Middle Mississippi into the Lower Mississippi Valley by Sunday night. This mid level trough axis will remain over the forecast area into Monday as a weak surface cold front drops southeast into northern portions of the region.
A cold front will sweep across the state during the overnight period into Sunday evening. Some convection will be possible through this TAF period as a cold front drops south through the state. Tonight Through Monday The latest analysis shows a warm front extending from the north through central AR and a cold front across OK and MO, advancing eastward.
300 AM CDT Sun Sep 5 2021 Minimal impacts expected today with 500mb ridge building into the northern plains. Highs will be a bit cooler than yesterday with some high clouds filtering into the area this afternoon as values rise into the low 70s for most locations outside of NW MN where more widespread CU will keep temps in the upper 60s. There is a 20 percent shower chance across Lake of the Woods area today as upper vort rounds the base of the trough sliding east through Hudson Bay. WAA ahead of the next short wave will allow 925mb to warm 10 to 15C by Monday afternoon allowing highs to climb into the low to mid 80s.
Upper level ridging remains in place across much of the eastern CONUS, extending from the lower Mississippi Valley into New England. However, the pattern will begin to change over the course of the day as an upper level low digs southward towards the Great Lakes region and an associated trough pushes through the Midwest region. As this occurs, the southern portion of the ridge will begin to flatten out and the northern portion of the ridge will move away to the east. A weakening cold front associated with the upper longwave trough is expected to move southeastward towards north Georgia this afternoon. The main upper level trough digs into the Southeastern U.
An upper level high pressure system is centered generally over the central west coast. As this system moves SE, it will push a cold front through the area Monday evening and into the overnight.
253 AM CDT Sun Sep 5 2021 As a slow moving cold front slowly sinks into southeast Missouri and far southern Illinois, showers have finally diminished across the region. Dry conditions will persist into Monday as well, although the return of southwesterly winds coupled with an expanding ridge aloft will bring slightly warmer temperatures.
320 AM EDT Sun Sep 5 2021 Occasional shower chances are expected today with a crossing cold front.
An upper-level wave will make its way over the area today as high pressure slowly builds in from the west, giving us north-northwesterly flow aloft. Temperatures tomorrow will also begin to increase from today's break in the heat as the upper high begins to build into our area, with low-90s possible over the plains and mid-80s over most other non-mountain areas.
Highs are expected to be limited to the lower 80's and where enough clouds are generated by the scattered storm activity, temperatures may stay slightly cooler in the upper 70's.
323 AM CDT Sun Sep 5 2021 High pressure and a drier air mass have settled into the Plains and Midwest, which has led to clear skies and light winds. WNW winds will increase by midday, gusting between 15 to 25 mph through the afternoon, highest along the highway 20 corridor.
Temperatures will warm Sunday and again Monday as weak ridging moves overhead.
A relatively dry surface air mass will still be in place as the period starts, arriving behind Sunday's cold front. Very dry air will be in place aloft in northwesterly flow on the southern edge of a northeast CONUS trough.
High pressure under a ridge over the region continues to drive the weather in the northern Rockies. Today and Monday the ridge flattens out causing some breezy conditions. Late in the week models suggest that the ridge will break down with a whimper. The hot, dry conditions under the ridge are exasperating wildfire conditions in northern California and Oregon, making it more likely that they will continue to produce smoke. The way the air moves around the ridge, that will place central Idaho and western Montana right down stream from the fires and in the path of the smoke. A ridge building over the region will keep VFR flying conditions, however, smoke from California and Oregon will continue to push into the area causing haze.
A cold front was sweeping across the state as of 12z. Today Through Monday Night Regional WSR-88D radars depict showers and thunderstorms over the Nrn third of AR associated with a slow moving cold front. High pressure will return on Monday. Over Nrn AR, highs are expected to reach the lower 80s.
The cold front at 08Z was located from near KAJG to KMWA, KCGI and KPOF, or just behind the main precipitation shield. There is an area of drizzle sliding south into the Tri State that may prolong the lowered visibilities there for a few hours behind the main rain shield.
Temperatures this afternoon should warm a few degrees as 850mb are about 2C warmer than yesterday. the axis of the upper level ridge to our west will shift across the local area on Sunday.
Storms will first form over the higher terrain then propagate west/southwest into the lower elevations where there should be sufficient CAPE to keep them alive. Monday the area of high pressure remains over Nevada with SE Arizona under east/northeast flow aloft. Under the influence of the northeast flow storms will try and move off the White Mountains into the lower elevations, but the environment does not look favorable and storms will likely not survive long off the higher terrain. During the middle of the week the ridge will slowly drift east as a trough moves towards the west coast.
A broad upper ridge extended across the Desert Southwest. A closed low was located over Ontario, Canada with a broad trough across the Great Lakes and Midwest. Went slightly warmer with highs near the latest CONSALL values. For tonight, clear skies with a strong thermal ridge overhead.
827 AM EDT Sun Sep 5 2021 Occasional shower chances are expected today with a crossing cold front.
An unseasonably strong area of high pressure will build into NM from the west this week. The warmer than average temperatures spread to all areas Monday afternoon as the above mentioned upper-level continues to strengthen as it shifts to near the central N/UT.
High pressure and a drier air mass have settled into the Plains and Midwest, which has led to clear skies and light winds. WNW winds will increase by midday, gusting between 15 to 25 mph through the afternoon, highest along the highway 20 corridor.
658 AM EDT Sun Sep 5 2021 High pressure will slide east today into the Atlantic. A cold front will approach from the west today and move through the area tonight. High pressure overhead will begin to slide east into the Atlantic today. This should keep fog development to a minimum and also keep morning temperatures several degrees warmer than the past two mornings.
The low level ridge axis reaches southwest across the Bahamas to near Cuba, placing the Florida Keys to the north of the axis and within a regime of southwesterly steering. Water vapor imagery highlights a few weak perturbations in the upper level flow over the Keys and the Gulf of Mexico, in line with the general weakness in the mean layer ridging analyzed by CIMSS. Weak high pressure will persist over or near the Florida Keys and adjacent coastal waters early this week.
This front will usher in some cooler air today both at the surface and aloft. The cold front may provide enough lift and convergence for a few showers over southern Minnesota this afternoon. Winds turn southerly for Monday with warmer temperatures expected.
Upper high over Nevada tonight and Monday will build eastward towards the Panhandles and transition the upper flow to more of a northerly or north northeasterly and eventually a northeasterly upper flow Monday night which will should keep any convection west of the forecast area tonight through Monday night. With the southerly surface winds expected and dry conditions Monday, temperatures should rebound back into the upper 80s to the lower and middle 90s.
510 AM EDT Sun Sep 5 2021 Occasional shower chances are expected today with a crossing cold front.
Mostly clear skies will give way to some CU in the northern areas this afternoon as the high pressure SFC slides SE. Minimal impacts expected today with 500mb ridge building into the northern plains. Highs will be a bit cooler than yesterday with some high clouds filtering into the area this afternoon as values rise into the low 70s for most locations outside of NW MN where more widespread CU will keep temps in the upper 60s. There is a 20 percent shower chance across Lake of the Woods area today as upper vort rounds the base of the trough sliding east through Hudson Bay. WAA ahead of the next short wave will allow 925mb to warm 10 to 15C by Monday afternoon allowing highs to climb into the low to mid 80s.
The upstream air mass is cooler and drier and this will be noticable given the recent hot and humid pattern.
445 AM MDT Sun Sep 5 2021 Current IR Satellite loop shows clear skies across southeast Wyoming and western Nebraska early this morning as an upper level ridge axis is forecast to drift east over the northern and central Front Range today.
337 AM MDT Sun Sep 5 2021 Current IR Satellite loop shows clear skies across southeast Wyoming and western Nebraska early this morning as an upper level ridge axis is forecast to drift east over the northern and central Front Range today.
1041 AM EDT Sun Sep 5 2021 Occasional shower chances are expected today with a crossing cold front.
Ridge of high pressure continues to build over California and the Great Basin region through the Labor Day weekend.
617 AM CDT Sun Sep 5 2021 (Today and tonight) A weak cold front has moved south into the Big Country, and will continue moving slowly south through our central counties today. Highs today are expected to be a little cooler (in the upper 80s to lower 90s) across the Big country north of the front. How far south the weak cold front ends up is in question at this point, as it becomes more diffuse.
This will again keep highest coverage (40-50%) of showers/storms skewed toward the areas with the highest moisture with limited coverage (20-30%) farther north, even though PWATs will recover somewhat this afternoon.
556 AM CDT Sun Sep 5 2021 Water vapor imagery shows an upper impulse tracking across west- central Nebraska with a deep upper low centered over north-central Ontario. At the surface, high pressure is centered over eastern Nebraska/northeast KS. Northwest flow aloft will be in place by this evening with a strong area of high pressure situated over the Central Great Basin. This feature will allow a cold front to surge through the forecast area on Tue into Tue evening. By Wed, deep upper trough is expected to stretch from Ontario through the Great Lakes and into the Ohio Valley. Meanwhile, upper ridging will expand across the Desert Southwest and across the Southern Plains. ECMWF and GFS start to diverge in their solution by Sat with the GFS much more agressive with an upper trough compared to the ECMWF.
This will change on Monday as a trough skirts by to the north of us in Canada and drags a dry cold front through the area during the afternoon.
(Today through Monday afternoon) Cooler temperatures are on their way. A cold front has moved into the Permian Basin and southeast New Mexico early this morning. Therefore, increased cloud cover and cooler temperatures are expected in the short term. However, temperatures will remain warm south of the front, in the mid 90s, for the lower Trans-Pecos and 100s along the Rio Grande. Low temperatures are forecasted to range from the low to mid 60s across the region.
605 AM CDT Sun Sep 5 2021 As a slow moving cold front slowly sinks into southeast Missouri and far southern Illinois, showers have finally diminished across the region. Dry conditions will persist into Monday as well, although the return of southwesterly winds coupled with an expanding ridge aloft will bring slightly warmer temperatures.
515 AM MDT Sun Sep 5 2021 The main story for the next few days is really the ridge building in over the Great Basin, which will dominate the weather for eastern Utah and western Colorado, keeping things dry and warm.
1029 AM EDT Sun Sep 5 2021 High pressure will slide east today into the Atlantic. A cold front will approach from the west today and move through the area tonight. High pressure overhead will begin to slide east into the Atlantic today. This should keep fog development to a minimum and also keep morning temperatures several degrees warmer than the past two mornings.
655 AM EDT Sun Sep 5 2021 High pressure over the Carolinas will drift offshore today. A cold front will weaken while settling southeast across the region tonight and Monday. Water vapor satellite showed a weakening ridge across the lower Mississippi Valley, and a trough across the Ohio Valley, with west to northwest flow aloft across central North Carolina. Additionally, a cold front will dig southeast across the Ohio Valley today, arriving along the Carolina foothills by late tonight. Conditions are expected to remain dry across the region today, however a few sprinkles may fall near the VA border this morning near the lee trough. Slight chance of showers are possible late tonight near the Triad as the cold front approaches the region and precipitable water values increase to near 1.
Today Through Monday Night Regional WSR-88D radars depict showers and thunderstorms over the Nrn third of AR associated with a slow moving cold front. High pressure will return on Monday. Over Nrn AR, highs are expected to reach the lower 80s.
A cold front will be roughly along the Ohio River at the start of the Short Term this morning. Low temperatures will range from the mid 50s in southern Indiana to the lower 60s in southern Kentucky. A sfc cold front will have cleared the CWA by Monday morning and will continue to sag across the Southeast. The lagging upper level trof axis follows suit and swings east of the area Monday afternoon.
Northerly winds are ushering in lower humidity to the Quad State with dewpoints already into the low to mid 60s. This will keep low temperatures a few degrees warmer, ranging from the upper 50s to around 60.
High pressure is building into the area and is currently located over central California. The center of the ridge will drift into central Nevada overnight and may bring with it some high cloud cover.
Very little of this is being sustained as the airmass is trying to moisten but instability remains on the low side. Dewpoints have come up some and are in the lower to mid 70s across the western half of the forecast area. Further north, showers and an isolated thunderstorm have regenerated along the cold front that will push through the region later this afternoon through tonight. Dewpoints will drop into the lower to mid 60s through Monday night with the exception being in the southeast, where 70s dew points will stick around. Cooler weather looks to occur tomorrow with highs mainly in the 80s.
An unsettled pattern continues across South Florida as a mid-level trough of low pressure remains around the south central portions of peninsular Florida. With the lower coverage compared to previous days, the potential will exist for storms capable of strong wind gusts and the slow movement could allow for heavy rainfall that could cause urban flooding concerns in the east coast metro this afternoon and early evening. Thanks to the aforementioned ridge, this feature is forecast to stay well to our north or northwest.
Temperatures today are expected to be slightly warmer than yesterday. warming into the low 80s for most. Temperatures this afternoon should warm a few degrees as 850mb are about 2C warmer than yesterday. the axis of the upper level ridge to our west will shift across the local area on Sunday.
The area of high pressure is projected to slowly make its way to the east over the course of tonight into Monday, keeping weather gentle overnight. Late tonight into Monday morning we can except cooler temps in the lower 60s.
1215 PM EDT Sun Sep 5 2021 Occasional shower chances are expected today with a crossing cold front.
1247 PM CDT Sun Sep 5 2021 As a slow moving cold front slowly sinks into southeast Missouri and far southern Illinois, showers have finally diminished across the region. Dry conditions will persist into Monday as well, although the return of southwesterly winds coupled with an expanding ridge aloft will bring slightly warmer temperatures.
Some patchy fog is possible tonight in low-lying areas with light winds and temperatures falling into the low 60s. Weak return flow will begin tomorrow afternoon as a trough begins developing along the high Plains.
135 PM EDT Sun Sep 5 2021 Occasional shower chances are expected today with a crossing cold front.
Light winds and a gradually clearing sky will follow overnight as temperatures drop into the lower to middle 60s area wide by Monday morning. A return to light southerly breezes and plenty of insolation will yield a warmer Labor Day as highs range from the middle 80s near the TX/NM line to the lower and middle 90s off the Caprock. Still expecting warmer and drier conditions through this week as upper level ridging expands across the southern Great Basin and slowly moves towards the forecast area.
An upper level ridge of high pressure extending eastward across Louisiana and Mississippi this morning is forecast to weaken later today into tonight as an upper level trough digs east of the Mississippi Valley region. An associated weak surface cold front will push southward into northern and central portions of Louisiana and Mississippi late this afternoon into this evening. A moist and unstable airmass will remain in place over much of the area this afternoon underneath the ridge aloft and ahead of the approaching boundary.
350 PM CDT Sun Sep 5 2021 The latest surface analysis places a cold front just south of and parallel to interstate 40. Water vapor imagery reveals a positively tilted trough over the northern Great Lakes with broad cyclonic flow across most of the eastern CONUS.