Aikyam-Lab/Synoptic-Bench huggingface dataset:
High pressure off the west coast will keep a dry northwest to north flow aloft over CA/NV through this weekend, with generally light surface winds mainly north to northeast, although some gusts near 20 mph could occur at times for the US-95/US-6 corridors in Mineral and southeast Mono counties.
111 PM MST Fri Sep 20 2024 A low pressure system over southern California will track across Arizona tonight and Saturday.
213 PM EDT Fri Sep 20 2024 High pressure will linger across the area today, though we could see some widely scattered showers and storms through this evening.
(Rest of today through Saturday) Not much change here from previous forecast reasoning and previous issuances of early morning suite of forecast products with dry conditions due to ridging influences still "As far as the eye can see" prevailing across mid state region through Saturday afternoon. With forecasted slightly warmer afternoon humidity values, especially on Saturday afternoon, some isolated locations west of Cumberland Plateau Region could approach heat index value wise around 100 degrees. Lows tonight will continue the seasonably mild trend of late and potentially be a little warmer than those even experienced this morning, ranging thru the 60s. With strong upper level ridging influences in place along with forecasted little cloudiness, not much wind, and favorable dewpoint depressions, strong indications that patchy fog formation will once again occur, mainly for locations around and west of I-65 Corridor Region.
617 PM CDT Fri Sep 20 2024 (Tonight through Saturday night) A 591 dm ridge remains centered over northeastern Mexico and south Texas early this afternoon. Showers look less likely Saturday as the high moves pretty much right over the top of us.
Temperatures along the Island Chain are in the lower to mid 80s. From synopsis, as a trough slides slowly eastward into the western North Atlantic this weekend, a ridge expands its control across the Southeast United States. Confidence in the extended marine forecast remains quite low and will be highly dependent on the expected formation of a low pressure system in the northwestern Caribbean Sea.
631 PM CDT Fri Sep 20 2024 (Tonight through Saturday night) Key Messages: - Low to medium chance for coastal flooding this weekend Mid to upper level ridging is expected to continue through tomorrow night.
No significant change to min temps in the low to mid 70s, possibly holding in the upper 70s along the immediate Volusia and Brevard coasts due to persistent onshore (NE) flow.
654 PM CDT Fri Sep 20 2024 (This evening through Saturday night) All is quiet for the short term period as upper level ridging continue to build into the area from the west. This will continue tomorrow with PoPs ~0% as the ridge moves further overhead. On the other side of things, the ridge continuing to build in also helps temperatures rise just a bit. High temperatures tomorrow afternoon will be in the low to mid 90s for all.
620 PM CDT Fri Sep 20 2024 (Tonight through Saturday night) The high pressure that has been parked in the middle layers of the atmosphere is allowing for similar conditions over Deep South Texas to persist.
953 PM EDT Fri Sep 20 2024 Forecast dries out completely just in time for the weekend, with high pressure dominating. Weak high pressure basically east of the Appalachians remains in control this evening although the overall column continues to show some decent moisture.
530 PM EDT Fri Sep 20 2024 High pressure will linger across the area today, though we could see some widely scattered showers and storms through this evening.
954 PM EDT Fri Sep 20 2024 High pressure will linger across the area today, though we could see some widely scattered showers and storms through this evening.
A low pressure system over southern California will track across Arizona tonight and Saturday.
748 PM EDT Fri Sep 20 2024 Forecast dries out completely just in time for the weekend, with high pressure dominating. Weak high pressure basically east of the Appalachians remains in control this afternoon although the overall column continues to show some decent moisture.
(This evening through Saturday night) All is quiet for the short term period as upper level ridging continue to build into the area from the west. This will continue tomorrow with PoPs ~0% as the ridge moves further overhead. On the other side of things, the ridge continuing to build in also helps temperatures rise just a bit. High temperatures tomorrow afternoon will be in the low to mid 90s for all.
942 PM CDT Fri Sep 20 2024 Wx map shows weak high pressure ridge extending from East Texas/Louisiana northeastward, giving a weak pressure gradient over the region. Lows in the lower to mid 70s.
755 PM EDT Fri Sep 20 2024 High pressure will linger across the area today, though we could see some widely scattered showers and storms through this evening.
929 PM CDT Fri Sep 20 2024 Surface and upper-level ridge prevailing across the region has allowed for light winds and clear skies areawide. Stable conditions expected to persist through daybreak with overnight lows forecast to fall into the lower 70s.
Skies will remain mostly sunny through the weekend as upper ridging builds into the area. For today, upper level low pressure will continue its eastward slide across Arizona and across the four corners area. Upper level ridging will be in control of the weather through the short term for the area.
350 AM EDT Sat Sep 21 2024 (Today through Sunday) High pressure and dry conditions will continue through the short term portion of the forecast.
Aside from a few lingering light showers in Northwest Arizona, dry conditions will resume today as high pressure slowly rebuilds over the region.
An upper trough from the Gulf of Alaska will bring middle and high clouds Sunday night, and enough northwest surface wind to hinder formation of the usual nighttime inversion. Min temps Sunday night should therefore be several degrees warmer than on Saturday night.
High pressure rebuilds this weekend. Cooler overnight low temperatures have prompted Frost Advisories for the valleys of west-central and northwest Montana that have not seen freezing weather so far this year.
- One more hot day lies ahead for central and southeast IL with highs in the upper 80s and lower 90s, as more humid conditions return this afternoon as a warm front lifts back north.
1240 AM CDT Sat Sep 21 2024 (Tonight through Saturday night) The high pressure that has been parked in the middle layers of the atmosphere is allowing for similar conditions over Deep South Texas to persist.
359 AM CDT Sat Sep 21 2024 Today and Tonight: Ridging aloft will remain wedged into the Lower Mississippi River Valley from the southwest, as high pressure at the surface remains over the southeast United States.
249 AM MDT Sat Sep 21 2024 The area will reside in a rather benign upper level pattern through the weekend with a low moving towards the Four Corners today and and upper level trough will to the north across central Canada. Daytime highs across the high country will top out in the 60s with readings around 70 expected in the lower valleys. Overnight lows through the weekend will be in the upper 30s to mid 40s in the valleys, cooler naturally in the mountains. A trough sweeping north of the region could spark a few showers around Island Park but PoPs are trending lowering during this time period so things will be very low impact if anything were to transpire.
159 AM EDT Sat Sep 21 2024 High pressure will linger across the area today, though we could see some widely scattered showers and storms through this evening.
310 AM CDT Sat Sep 21 2024 - A strong cold front will track across the area this morning, creating cooler and windy conditions today.
(Today and tonight) Another beautiful day on tap for the region as high pressure remains overhead.
A weak cold front runs from northwest OH through southern IL early this morning. An upper low currently over AZ will move east northeast and meet with a northern stream upper trough progressing eastward across the north central CONUS on Sunday. This will strengthen our flow aloft and support another cold front which will approach from the Midwest. What's left of the first frontal boundary lifts to the northeast as a warm front ahead of the next cold front.
Another round of showers and thunderstorms is expected today along and ahead of the cold front. Temperatures will be much cooler behind this front with temperatures across northwestern Minnesota (behind the front) 20 to 25 degrees cooler than southeastern Minnesota (ahead of the front) for today's forecast high temperatures. Behind this front Sunday will be much cooler with high temperatures in the mid to upper 60s. Also with high pressure moving in, there should be clearing skies during the day.
1222 AM CDT Sat Sep 21 2024 Surface and upper-level ridge prevailing across the region has allowed for light winds and clear skies areawide. Stable conditions expected to persist through daybreak with overnight lows forecast to fall into the lower 70s.
(Today through Sunday) Little day-to-day variability in sensible weather conditions will continue through Sunday due to the presence of a deep-layer ridge.
This will be00 the first day in a while that we're not seeing temperatures creep up into the 80s, so it may feel on the cool side although it's still warmer than seasonal normals.
We remain on the eastern side of the upper ridge that is centered to our southwest. Some very weak short wave energy dropping southeast along the periphery of the ridge may be enough to bring isolated showers mainly to northern portions of the area this afternoon into early evening.
(Today through Sunday afternoon) Current water vapor imagery shows a large upper level low over the California/Arizona border. The low will move east today with strongly divergent flow ahead of the low situated over eastern New Mexico and West Texas this afternoon and evening. The presence of the low may allow convection to persist well after sunset and possibly even after midnight. Temperatures today will be similar to yesterday, perhaps a degree or two cooler due to increased cloud cover during the afternoon. Tonight should be the last night for lows in the 70s for most locations before a cold front moves into the area Sunday. The low pressure system over the Rockies moves into the Central Plains pushing a cold front south that reaches the I-20 corridor during the afternoon and quickly pushes into the Big Bend overnight.
A low pressure system moving across Arizona will bring cooler temperatures, breezy winds, and chances for showers and thunderstorms tonight through Saturday. Warmer and drier weather is expected to return for much of the upcoming week. A compact upper low now crossing the Lower Colorado River will eject ENE to the Four Corners by this time on Saturday. Expect steepening lapse rates and increasing moisture overnight as the low moves through. This will be enough for scattered showers and thunderstorms, as well as some areas of stratiform precipitation in the dynamic eastern portion of the low. Activity with this system is most likely near, north and northwest of the core of the low.
1214 AM CDT Sat Sep 21 2024 (Tonight through Saturday night) A 591 dm ridge remains centered over northeastern Mexico and south Texas early this afternoon. Showers look less likely Saturday as the high moves pretty much right over the top of us.
1206 AM CDT Sat Sep 21 2024 (Tonight through Saturday night) Key Messages: - Low to medium chance for coastal flooding this weekend Mid to upper level ridging is expected to continue through tomorrow night.
(Today through Sunday) Water vapor imagery this morning reveals an upper level ridge anchored across the Southern Plains. This ridge will remain in control for one more day before it begins to flatten out on Sunday as an upper trough lifts across the Plains. High temperatures today will warm into the low 90s along the coast to the mid 90s out west. A weakening ridge will help us trim off a couple of degrees from our highs on Sunday.
1202 AM CDT Sat Sep 21 2024 (This evening through Sunday) The upper level ridge over the area will be weakening during the short term period, as a closed low over southern CA lifts and moves off to the northeast toward the upper midwest. At the surface, a cold front will drop down and stall near the corner of NW Arkansas over the weekend.
1046 PM CDT Fri Sep 20 2024 Wx map shows weak high pressure ridge extending from East Texas/Louisiana northeastward, giving a weak pressure gradient over the region. Lows in the lower to mid 70s. 08/DML (Tonight through Sunday night) Looking at the current pattern, an upper-level ridge extends across the southern plains towards the northeast and is working together with a high-pressure system that is located across the Gulf Coast. During this time the high pressure will keep our winds light and variable. A combination of the low winds and high dewpoints could lead to widespread fog across Acadiana.
Showers to the west with the main trough seem on track, so little change there. Still expecting winds to ramp up with the cold frontal passage.
Otherwise, high pressure at the sfc remains layered across the southern Atlantic states, while a weak upper ridge axis gradually drifts eastward over the southern Plains/western Gulf region. These synoptic features are resulting in another quiet/seasonably warm day for the mid TN Valley, as afternoon highs again climb mainly into the lower 90s/near 90F, under mostly sunny skies.
The setup as the upper level system arrives includes an occluded upper level low moving eastwards through central Canada producing a broad area of h500 height falls and CVA alongside a relatively weak low level jet.
With a cooler air mass in place highs today will be in the lower 60s with 40s in the high country. Weak ridging Saturday night will give way to more modest height falls Sunday as another weather system tracks across Canada with prefrontal warming boosting highs Sunday back into the lower/mid 70s. The Canadian system will drag another front across the high plains and our area Sunday night.
- Northwesterly winds will increase today behind a cold front, gusting 30 to 40 mph into this evening.
620 AM CDT Sat Sep 21 2024 (Today through Sunday) Little day-to-day variability in sensible weather conditions will continue through Sunday due to the presence of a deep-layer ridge.
550 AM CDT Sat Sep 21 2024 Today and Tonight: Ridging aloft will remain wedged into the Lower Mississippi River Valley from the southwest, as high pressure at the surface remains over the southeast United States.
High pressure is continuing to build across the eastern Pacific and gradually drift towards shore.
A low pressure system crossing through Arizona will bring cooler temperatures, breezy winds, and chances for showers and thunderstorms through this afternoon. Warmer and drier weather is expected to return for much of the upcoming week. An upper level low is located along the Arizona- California border early this morning. The low will push towards the east-northeast through the day today, exiting off towards Four Corners by late tonight. Snow levels remain high, above 10,000 ft, so expect that only the highest elevation will see snow with this event. As the low tracks towards Four Corners, dry air will start to be wrapped into the west/northwest side of the low.
(Today through Sunday) High pressure and dry conditions will continue through the short term portion of the forecast.
We can see this more comfortable airmass reflected in surface observations on land as current dew points are coming in with values in the lower to mid 70s. Boaters can expect less clearance under fixed bridges, especially during the hours around high tide.
Water vapor imagery shows a closed low in west central Arizona with a few cloud build ups in Pinal County. Radar shows some returns, albeit on the low end of reflectivity, which may be enough to produce virga this early morning in eastern Pinal County and into western Graham County. The low pressure center will move eastward to bring westerly to northwesterly winds with a strong breeze east of Tucson and much cooler temperatures. Ensemble models show a ridge of high pressure building across the western states starting tomorrow.
851 AM MDT Sat Sep 21 2024 Temperatures will remain cooler than normal under a northwest flow aloft through tonight, with the potential for frost again in valleys and low-lying areas.
316 AM MDT Sat Sep 21 2024 Temperatures will remain cooler than normal under a northwest flow aloft through tonight, with the potential for frost again in valleys and low-lying areas.
The greatest coverage of convection is north of the southern Appalachians as the upper ridging is limiting development across Kentucky and northern Tennessee. The highest CAPE will be across southwest Virginia and northern Plateau. We remain on the eastern side of the upper ridge that is centered to our southwest. Some very weak short wave energy dropping southeast along the periphery of the ridge may be enough to bring isolated showers mainly to northern portions of the area this afternoon into early evening.
626 AM CDT Sat Sep 21 2024 - A strong cold front will track across the area this morning, creating cooler and windy conditions today.
Still anticipating it to be warm today, with highs reaching the lower 90s for most of the local area.
649 AM CDT Sat Sep 21 2024 (Today through Sunday Night) Ridging over SE Texas will continue to result in above normal temperatures this weekend. Low- level moisture, high pressure aloft, and calm winds, will contribute to patchy fog, with dense fog possible at times, this morning and again Sunday morning.
A low pressure system will continue moving east across Arizona and New Mexico. The high pressure across our region of west Central Texas will keep hot and dry conditions in place. The center of the high will shift to the southeast.
(Today through Sunday) Strong mid-level ridging will remain anchored over Texas and northern Mexico today into tonight. The 500mb ridge will then begin to flatten out and shift to the east on Sunday. Tonight will be warm with lows falling into the mid to upper 70, except for the lower 80s along the coast. Another around of isolated convection is possible on Sunday, mainly across the Low to Mid Valley.
627 AM CDT Sat Sep 21 2024 (Today through Sunday) Water vapor imagery this morning reveals an upper level ridge anchored across the Southern Plains. This ridge will remain in control for one more day before it begins to flatten out on Sunday as an upper trough lifts across the Plains. High temperatures today will warm into the low 90s along the coast to the mid 90s out west. A weakening ridge will help us trim off a couple of degrees from our highs on Sunday.
537 AM MDT Sat Sep 21 2024 Temperatures will remain cooler than normal under a northwest flow aloft through tonight, with the potential for frost again in valleys and low-lying areas.
Troughiness in the mid-levels will continue to weaken and push seaward over the next 24 hours. Stout mid-level high pressure over Texas will expand eastward with mid-level heights rising across the GoMex and FL peninsula. The highest water levels are forecast in the late morning hours with a secondary peak in the late evening. High pressure holds over the Southeast U.
621 AM EDT Sat Sep 21 2024 (Today and tonight) Another beautiful day on tap for the region as high pressure remains overhead.
634 AM CDT Sat Sep 21 2024 (Today through Sunday) Strong mid-level ridging will remain anchored over Texas and northern Mexico today into tonight. The 500mb ridge will then begin to flatten out and shift to the east on Sunday. Tonight will be warm with lows falling into the mid to upper 70, except for the lower 80s along the coast. Another around of isolated convection is possible on Sunday, mainly across the Low to Mid Valley.
Isolated showers possible up to about the I-81 corridor but high pressure influence further to the east and north should keep precip at bay.
High temperatures will be in the lower 90s. Mid-level ridging will become centered over the Central Texas Coast overnight while a few mid-level disturbances will move southeast over portions of the Mid-Mississippi River Valley Region. Mid-level ridging will remain to our southwest on Sunday while a few impulses aloft will continue to move over the portions of Tennessee and Northern Georgia. Clouds will be thicker across the far north and northeast with potentially a stray shower or two far northeast, but will keep PoPs unmentionable due to the low potential. High temperatures will range from around 90 in the higher elevations east to the low to mid 90s west and southwest.
High pressure will build over the region this upcoming week. Any light showers that may be over far northeast Mohave County this afternoon will likely end by 6 pm MST as the upper low moves east through the Four Corners region. Elsewhere today, temperatures have been very comfortable with just some shallow cumulus forming over the higher terrain. Model simulations yesterday were still in the camp that our region would feel more of the affects from the passage of a trough moving through UT/CO early in the week. Last nights 00Z, and now the latest 12Z simulations have backed off, now moving the trough further north and east.
- Much cooler Sunday. The well advertised cold front has reached northwest Iowa this afternoon and it will move slowly southeast through the remainder of the afternoon. Dew points in the low 70s have reached into southwest Iowa while temperatures are in the 90s in some areas of central Iowa. Southern Iowa was still cooler where more clouds and some weak elevated showers and thunderstorms have persisted. Coincidentally, the higher dew points have been in that part of the state and that has also been an area where the mid-level moisture has been highest. This will lead to a much cooler Sunday with highs only in the 60s expected.
1247 PM CDT Sat Sep 21 2024 (Rest of today through Sunday) Water vapor imagery this morning shows an upper-level high pressure centered over eastern TX. With Middle TN mainly under the influence of ridging from this high, temperatures through this weekend will remain hot in the upper-80s into the low-90s.
/NEW/ /Through Sunday/ Mid-level ridging will remain in control through a good chunk of the weekend with hot and dry conditions persisting through at least mid-afternoon Sunday for the entirety of the FWD CWA. Another mild, humid night is expected tonight with overnight lows in the low to mid-70s.
Temperatures will remain cooler than normal under a northwest flow aloft through tonight, with the potential for frost again in valleys and low-lying areas.
Ridging will remain to our north but will drift from the Gulf of Mexico to the Atlantic. The lower PW along with ridging remaining to our north will limit shower activity each day with only isolated chances across the area. Ridging will continue to drift into the Atlantic causing what we call a break between it and a trough pushing the midwest.
1235 PM CDT Sat Sep 21 2024 (Today through Sunday) Strong mid-level ridging will remain anchored over Texas and northern Mexico today into tonight. The 500mb ridge will then begin to flatten out and shift to the east on Sunday. Tonight will be warm with lows falling into the mid to upper 70, except for the lower 80s along the coast. Another around of isolated convection is possible on Sunday, mainly across the Low to Mid Valley.
Dry conditions with cooler mornings over the weekend. High pressure will push temperatures back to well above average for the coming week. Breezy today with cooler air as a low pressure system pushes through the state. Cooler Sunday morning with 40s in eastern valleys and 50s to lower 60s across the lower deserts.
High pressure will keep daytime highs in the low 90s while overnight lows will be in the upper 60s and low 70s.
High Pressure building in over the Silver State this weekend will bring a pattern change, delivering quiet conditions, with light winds and slowly warming temperatures through the end of the week. Today through Sunday High Pressure beginning to build in over the state leading to quiet weather for the weekend.