Aikyam-Lab/Synoptic-Bench huggingface dataset:
High pressure will remain entrenched across the desert southwest into mid week. Some moisture will remain trapped underneath the high pressure which will lead to convection during the afternoon hours. High pressure remains across the Great Basin and will remain so into mid week. This high pressure will have some moisture trapped underneath it.
303 AM EDT Sun Jul 30 2017 A ridge of high pressure will continue to provide dry and mostly sunny conditions today. High temperatures this afternoon will reach into the lower 80s.
Very little to adjust in the near term grids this evening, with a large surface anticyclone centered across the upper MS valley providing a refreshing break from the hot/humid conditions we experienced last week. as a 500-mb trough over the mid- Atlantic region brushes the region and strengthens large scale ascent. and slightly warmer near large bodies of water. Several of the models deepen this low into a tropical like feature, so it will need to be monitored closely. Upper flow becomes a bit more westerly on Monday as the U/L ridge broadens and builds across the Ohio Valley/Mid Atlantic but overall heights change very little.
253 AM CDT Sun Jul 30 2017 Another quiet morning across the region as high pressure centered over the western Great Lakes continues to extend southwest into the lower Missouri Valley.
406 AM EDT Sun Jul 30 2017 High pressure will provide dry weather and seasonable temperatures through Monday. Large area of high pressure over the central Great Lakes will make for another beautiful summer day. Continue under an upper level trough this period.
350 AM CDT Sun Jul 30 2017 An upper level high remains over West Texas this morning while a weak surface boundary has pushed southwest into the Permian Basin causing winds to back from a more easterly direction. Tomorrow the upper high shifts back to the west where it will remain for the remainder of the week. The best chance for rain will be in the first half of the week when a weak cold front, reinforced by convection, slowly moves south into the Trans Pecos region. Highs drop into the 80s for many locations Tue-Thu mainly due to rain and increased clouds as opposed to any cold air advection behind the front, so if the rain doesn't materialize then highs could be a few degrees warmer than currently forecast.
549 AM EDT Sun Jul 30 2017 A large area of high pressure over the region will provide mostly clear skies and light winds expected over the next 24 hours. High pressure remains anchored over the upper midwest, tucked beneath lower amplitude mid level northwest flow defining the periphery of broad upper ridging stretching back through the central/western conus. Surface ridging broadens with time to encompass much of southern lower Michigan, a response to persistent positioning of weakly confluent northwest flow overhead. Any further airmass modification appears limited given retention of weak northwest to west low level flow and continued displacement of the upper ridge axis to the west.
The cold front still lies a little to our north, across central GA and AL, but will continue to slowly push southeastward through the early morning hours. Lows will dip to around 70 in our northern zones as the cold front moves through, but stay in the mid 70s across most of the area, upper 70s along the immediate coastline. The upper level trough will continue to dig south and east which will push the surface cold front to our south. By Sunday night drier air will arrive which will keep rain chances below normal on Monday with the highest PoPs (around 40%) in the Big Bend.
158 AM EDT Sun Jul 30 2017 High pressure over the Upper Great Lakes will build slowly southeast and become located over the region Monday. As the high drifts just south of the state, it will gradually become more muggy through the mid week period. A stellar/sunny day is on tap for Sunday as high pressure spreads out to cover the OH Valley and entire Midwest. Monday afternoon a surface cold front will drop south into Upstate NY.
422 AM EDT Sun Jul 30 2017 Dry weather is expected through Sunday as high pressure remains over the North Country. A weak frontal system will drop south from Quebec and could provide some isolated showers generally over the higher terrain on Monday afternoon.
/EC/ An unusually dry airmass continues to surge southward into the ArkLaMiss region early this morning as high pressure builds over the area. /EC/ Northwest flow will persist across the region aloft, while high pressure at the surface wedges itself into the ArkLaMiss from the north.
248 AM MDT Sun Jul 30 2017 Latest analysis shows the western CONUS upper ridge building eastward over the forecast area for today. At the surface, high pressure is centered over the midwest with a weakly defined low pressure trough to the east of the Rockies resulting in relatively light easterly sfc winds over the forecast area today. This will bring increasing low level moisture into the region this morning with dewpoints in the lower to mid 60s on the South Dakota plains and in the lower to mid 50s over northeastern Wyoming and the Black Hills. Diurnal heating, combined with the low level moisture will result in a N-S band of SBCAPE ranging from 1000-2000J/KG over wrn SD this afternoon, with much lower values over nern WY.
335 AM EDT Sun Jul 30 2017 High pressure with cooler and drier air prevails for the remainder of the weekend and through mid week.
A few sites have been allowed to mix a bit more down into the lower 60s.
351 AM PDT Sun Jul 30 2017 Upper level ridge will build in over the region through the week with above normal temperatures expected.
Surface pressure gradients have strengthened and turned offshore while upper level flow is increasing out of the east around the building upper ridge.
Issued by National Weather Service Pueblo CO 541 AM MDT Mon Sep 28 2020 NVA on the backside of a departing trough will produce strong subsidence over our fcst area today. A stagnant weather pattern will be in place with and upper level ridge over the western states and a trough over the eastern half of the USA.
424 AM CDT Mon Sep 28 2020 Even cooler today as northerly flow aloft and close proximity of the upper trough, coupled with 850mb temperatures falling to near 0C, bring another 10-15 degree drop in high temperatures. However through the rest of the work week, dry, breezy, and cooler autumn weather is the theme as we remain under the influence of dry northwest flow aloft and the aforementioned broadening upper trough meandering eastward.
Temperatures will cool a few degrees to start the week before high pressure rebuilds and pushes afternoon highs back to near record levels the second half of the week. With a strong ridge near the west coast and a trough digging into the northern and central Plains, the resulting northerly flow will be dry and a little cooler. A fragmenting frontal boundary is pushing down from the north and northeast with most of the cooler air on course for eastern areas including Greenlee, Graham and Cochise counties. A few degrees of cooling as far west as Tucson, with little change in the lower deserts. That high amplitude ridge near the coast will build into the central Basin and desert southwest over the next 72 hours.
As the fog dissipates later this morning, the focus will quickly shift to a cold front moving into the Delta region that is expected to push southeast across the entire forecast area by late afternoon. As the front pushes into a capped airmass ahead of the upper level trough, the forcing and deep convection will be mostly post-frontal, and this will mitigate the concern for any strong to severe wind gusts. Otherwise, expect significantly cooler air and gusty northerly breezes following the front to begin ushering in a more fall-like airmass.
420 AM MDT Mon Sep 28 2020 Warm, dry high pressure will result in mostly clear skies over the Northern Rockies for much of this week. Patches of shallow river and valley [freezing] fog will develop each late overnight through mid-morning period. Valleys will cool to near seasonal averages for overnights, trending close to freezing for many locations over 2500 feet elevation. Models continue to suggest that there will be some disruption in the high pressure over the western US (due to weak storm systems perturbing the upper level flow or redevelopment of the ridge axis westward.
518 AM CDT Mon Sep 28 2020 Strong 1030mb Pacific high pressure across Wyoming this morning will build slowly south into Colorado today and tonight. The RAP model shows an area of very dry air aloft moving through the region ahead of a warm front supporting the radiational cooling also. Thereafter, moisture will begin to increase as the warm front enters wrn Nebraska. The high temperature forecasts today and Tuesday use the same guidance blend plus bias correction for highs in the 60s today and 70s Tuesday.
With mostly cloudy conditions expected today, not looking for temperatures to move very far today, with highs only in the low to mid 50s. By late tonight into Tuesday morning, we'll see a thermal ridge come out of the Dakotas and into western MN. On the other side of the CWA, clouds are expected to persist most of the day in western WI, with perhaps a few showers possible with WAA to the east of the thermal ridge moving into southwest MN. Ridging in the western CONUS and troughing in the east will keep the forecast area in cool northwest flow through the weekend.
Thanks to a strong cold front that moved through overnight, temperatures today will be much cooler.
Latest WV satellite reveals a strong upper trough churning southeastward over the northern and central Plains with upper ridging over the California and Oregon coasts. At the surface, cold front is well south of the Panhandles with drier air beginning to filter in as breezy northerly winds continue across the CWA.
559 AM CDT Mon Sep 28 2020 With some low CIGs and rainfall this morning behind the cold front. Today Through Tuesday Night The cold front is progressing SE through the state early this Mon morning.
639 AM CDT Mon Sep 28 2020 (Today and tonight) Today will be much cooler across our area, with breezy north winds. With a much drier airmass in place, temperatures are expected to drop into the lower to mid 40s for overnight lows.
/issued 334 AM CDT Mon Sep 28 2020/ A strong cold front is moving through the Midsouth, currently located along a line from Union Springs, TN to West Memphis, Arkansas, to Palestine, AR. A deep trough will remain in place over the Eastern half of the US. A closed, progressive upper level low will track from Minnesota, down the Western side of the Mississippi River Valley, to South Alabama by Midweek, then up the East Coast after Midweek.
Low ceilings will also develop along/behind a cold front moving steadily southeast across the ArkLaMiss region. As the fog dissipates later this morning, the focus will quickly shift to a cold front moving into the Delta region that is expected to push southeast across the entire forecast area by late afternoon. As the front pushes into a capped airmass ahead of the upper level trough, the forcing and deep convection will be mostly post-frontal, and this will mitigate the concern for any strong to severe wind gusts. Otherwise, expect significantly cooler air and gusty northerly breezes following the front to begin ushering in a more fall-like airmass.
RH values should remain above critical values (>15%), although they will reach down into the high teens, so near critical values will be possible. Some temps along the lower Ark rvr valley will get down towards 32 F and expect some patchy frost along the greater US 50 corridor from Pueblo east to the KS border. A strong upper-level ridge will continue to dominate the western US for the remainder of the week, keeping northwest flow aloft and quiet weather.
555 AM CDT Mon Sep 28 2020 A closed upper level low is currently moving south from Manitoba into the Northland, promoting the formation of scattered showers that have started to pop up in northern St. By the afternoon, a few rumbles of thunder are possible within the showers before they slowly dissipate in the evening as the low moves south.
Elsewhere, winds will be much lighter than the past few days as high pressure ridging over the Pacific Northwest begins to work its way east over the northern Rockies region.
407 AM CDT Mon Sep 28 2020 Cooler and drier weather will prevail across eastern Oklahoma and northwest Arkansas this week.
Warm and dry conditions across Western Washington this week with strong high pressure aloft over the region.
(Today and tonight) Today will be much cooler across our area, with breezy north winds. With a much drier airmass in place, temperatures are expected to drop into the lower to mid 40s for overnight lows.
627 AM CDT Mon Sep 28 2020 MVFR Ceilings across area terminals will gradually improve to VFR as high pressure builds across the region. /Today through Tuesday/ Showers and thunderstorms along a cold front to continue migrating southeast through deep east Texas, north Louisiana, and southern Arkansas through the remainder of the morning. High pressure behind the front to bring strong northwest winds around 20 mph with higher gusts throughout the day. Temperatures to climb into the low to mid 70s today, falling into the upper 40s across southeast Oklahoma to the lower 50s elsewhere tonight. Highs on Tuesday to climb into the lower to middle 70s.
A strong high pressure system will then proceed to deliver above normal temperatures, dry conditions and light winds for the remainder of the week. High pressure was centered over Oregon this morning as a low pressure system and associated cold front continued to dive southward across the central United States. For today, a shallow portion of the diving cold front will push across northern Arizona from the direction of the Four Corners.
High pressure will prevail through the forecast period.
1050 AM CDT Mon Sep 28 2020 A strong cold front is just about to exit the Mid-South. A band of post-front showers extends behind the front to near the MS River with cooler air filtering into the region on gusty NNW winds. /issued 334 AM CDT Mon Sep 28 2020/ A strong cold front is moving through the Midsouth, currently located along a line from Union Springs, TN to West Memphis, Arkansas, to Palestine, AR. A deep trough will remain in place over the Eastern half of the US. A closed, progressive upper level low will track from Minnesota, down the Western side of the Mississippi River Valley, to South Alabama by Midweek, then up the East Coast after Midweek.
This activity will linger into the the evening hours, then diminish toward 03Z as the low moves into IA. Since models have been overestimating afternoon dew points of late, stayed on the low end of guidance, which would yield afternoon relative humidity values of 25 to 30 percent through the MO River Valley - leading to another critical fire weather day across the area. A cold front will slide through the region on Tuesday night.
242 PM CDT Mon Sep 28 2020 A cold front has now entered NW AL this afternoon, with a line of showers and thunderstorms ahead of it approaching the I-65 Corridor attm. Once the front pushes across the area overnight, the chances for showers and storms will dwindle from W to E, and winds will shift around to the NW ushering in cooler and drier air. Morning lows Tuesday will bottom out in the lower 50s. A nice change in the airmass will be noted on Tuesday with daytime highs about 15 degrees cooler than what we saw today.
(This evening through Tuesday) As advertised, the strong cold front has moved through much of Texas. Temperatures early this afternoon were in the low 70s, with dewpoint temperatures in the mid to upper 30s. Conditions were still rather breezy behind the cold front.
152 PM CDT Mon Sep 28 2020 A closed upper level low is currently moving south from Manitoba into the Northland, promoting the formation of scattered showers that have started to pop up in northern St. By the afternoon, a few rumbles of thunder are possible within the showers before they slowly dissipate in the evening as the low moves south.
Satellite imagery this morning showing clear skies with a strong ridge of high pressure overhead. Ridge will continue to bring clear skies, light winds, and a slight day to day warming trend through the midweek.
325 PM EDT Mon Sep 28 2020 Synopsis/Discussion/Marine -Cool and showery; occasional thunder risk -Frost/freeze possible by week's end -- Cool and showery; occasional thunder risk -- As a deep longwave trough continues to evolve/dig over the eastern U. this week, a series of sfc cold fronts will bring progressively colder air into the GrtLks Region.
159 PM MDT Mon Sep 28 2020 A large ridge building across the West Coast will slowly move east over the next few days.
NVA on the backside of a departing trough will produce strong subsidence over our fcst area today. with cold air aloft still in place, temperatures will below normal with highs in the lower 60s for Denver, Despite the cold air aloft, relative humidity values will reach the mid teens across the northern plains and mountain valleys and 20s elsewhere. A stagnant weather pattern will be in place with and upper level ridge over the western states and a trough over the eastern half of the USA.
251 PM CDT Mon Sep 28 2020 Cold front continues to move through the area this afternoon with showers and thunderstorms continuing along and to the east of a line from Cameron to Bunkie. Cooler drier air will continue to advect into the region tonight as skies gradually clear. Winds will continue to increase in the wake of a cold front moving across the coastal waters this afternoon and evening.
108 PM MDT Mon Sep 28 2020 Water vapor shows upper low over the Upper Midwest with ridge embedded in northwest flow over the Northern Rockies into the Northern Plains. Little change it the overall weather pattern through the weekend, with long wave trof forming over the eastern CONUS and fast northwest flow aloft through the Northern Plains. Tuesday will be the warmest day of the week with short wave ridge moving through the Northern Plains.
1005 AM CDT Mon Sep 28 2020 A closed upper level low is currently moving south from Manitoba into the Northland, promoting the formation of scattered showers that have started to pop up in northern St. By the afternoon, a few rumbles of thunder are possible within the showers before they slowly dissipate in the evening as the low moves south.
215 PM MDT Mon Sep 28 2020 Dry conditions will prevail over the region for next several days, as a strong upper level ridge of high pressure builds over the Pacific Northwest.
Conditions remain favorable for radiational cooling and for low temperatures to fall to the lower 30s or near 30 for all areas near and south of Highway 2. On Tuesday, a wedge of warmer air will push through Nebraska as a weak cold front moves across. This will not actually bring cooler air in until a second front moves in Tuesday night. A cold front will move in after midnight and the atmosphere will remain somewhat mixed.
145 PM MDT Mon Sep 28 2020 High pressure has settled across the region. VFR with lighter winds as high pressure builds. High pressure will build back over the state this week.
Cold front is now moving over the coastal waters and cooler and drier air is expected to continue to filter in behind it.
A strong cold front, currently over middle Tennessee, will move across the area late this afternoon and evening. The low-level shear is limited (geneally 0-1km near 10kts) and 0-3km CAPE is low, so tornado threat is quite low. A strong cold front, currently over middle Tennessee, will move across the area late this afternoon and evening. The low-level shear is limited (geneally 0-1km near 10kts) and 0-3km CAPE is low, so tornado threat is quite low. Chattanooga Airport, TN 55 66 50 70 53 / 100 40 10 10 10 Knoxville McGhee Tyson Airport, TN 55 62 51 67 53 / 100 60 20 10 10 Oak Ridge, TN 55 63 50 69 52 / 100 60 20 10 10 Tri Cities Airport, TN 56 61 51 64 50 / 90 90 50 20 10.
1151 AM CDT Mon Sep 28 2020 This morning, an upper-level trough is digging southward into the Great Plains and Midwest. At the surface, an occluding area of low pressure is positioned over Ontario, and its associated cold front is pushing through the Great Lakes, Ohio Valley, and Lower Mississippi Valley. Highs this afternoon will be notably cooler - about 10 degrees below normal and what was experienced yesterday afternoon. The large scale pattern amplifies as we get into Tuesday, and the previously mentioned trough settles into the eastern U. as a ridge builds along the West Coast.
356 PM EDT Mon Sep 28 2020 Mean-layer ridging has been squashed to the south and now stretches west to east from Mexico to the extreme western North Atlantic. Water vapor imagery highlights a long-wave trough carving lower heights into the Mississippi River Valley, driving a cold front southeast through the northern Gulf Coast. The low- level ridge axis is across South Florida, lending to variable breezes across the island chain and marine observation platforms. The lee-side of the Lower Keys has been the favored development area over the past couple of hours.
This morning's cold front raced southward and is already well out over the gulf this afternoon. Winds are forecast to quickly relax this evening and should fall below 10 mph area-wide shortly after sunset as high pressure continues to build in. With ample sunshine and subsidence, Tuesday should be a few degrees warmer during the day, and then temps will drop off again overnight into the 48 to 56 degree range once again.
Relative humidities over the higher terrain will experience poor recovery in many locations each of the next several nights, too. So what's to blame for this dry, stagnant pattern we're in? It's a strong upper level ridge of high pressure that is currently centered over the Pacific Northwest. The models forecast this high amplitude ridge to remain locked in place over California for the next 7 days.
1226 PM CDT Mon Sep 28 2020 A cold front moved through Arkansas this morning. High pressure is building into the state behind the front. With some low CIGs and rainfall this morning behind the cold front. Today Through Tuesday Night The cold front is progressing SE through the state early this Mon morning.
Showers look to diminish after 03Z, but then hi-res models hint at more showers developing from western into central Minnesota overnight on the western periphery of the trough as weak warm air advection ensues ahead of an approaching warm front. Temperatures will be fairly chilly tonight, with lows dipping into the low/mid 40s. On Tuesday we see temperatures rebound a bit as the thermal ridge associated with the warm front lifts into the area. Less cloud cover is expected, but dewpoints and westerly winds should keep lows from falling lower than the low to mid 40s. This is supported by the larger scale pattern with ridging over the western CONUS and troughing in the eastern CONUS.
1224 PM CDT Mon Sep 28 2020 Strong 1030mb Pacific high pressure across Wyoming this morning will build slowly south into Colorado today and tonight. The RAP model shows an area of very dry air aloft moving through the region ahead of a warm front supporting the radiational cooling also. Thereafter, moisture will begin to increase as the warm front enters wrn Nebraska. The high temperature forecasts today and Tuesday use the same guidance blend plus bias correction for highs in the 60s today and 70s Tuesday.
357 PM CDT Mon Sep 28 2020 Cold front currently moving through the forecast area, having already cleared Slidell and Kenner. The upper thermal trough stucture still lags with a considerably large area of elevated convection between Lake Charles and Lafayette. Temperatures are expected to fall to the lowest in quite some time.
The cold front has exited South Texas with gusty northerly winds continuing this late afternoon over land areas. Highs for Tuesday should warm into the low to mid 80s under mostly sunny skies.
Tomorrow will continue the breezy weather but with slightly warmer temps. Weak ridging along with westerly sfc winds (and some warm advection) will help push temps back into the 70s, but will also lead to drier conditions.