Aikyam-Lab/Synoptic-Bench huggingface dataset:
The 20Z afternoon surface analysis showed a high pressure axis extending down the central Missouri River basin, bisecting the eastern half of the CWA. Upper level ridging encompassed much of the western CONUS with high orographically-generated cirrus spilling southeastward across the Central Plains. As the high slides east tonight, return flow is expected to bring an increase in low-level moisture northward from the Southern Plains.
1145 PM CDT Sat Mar 18 2017 At H5 large closed low centered over Juneau and quasi blocking pattern over the Great Lakes with broad trough extending into the southeast CONUS. Between these two systems is a large warm dry ridge of high pressure extending from Mexico through the northern plains into central Canada. Cold front will move through dry with stronger winds in the west.
1009 PM EDT Sat Mar 18 2017 An area of low pressure over the eastern Great Lakes, will track off to the southeast, allowing showers to end tonight.
/issued 245 PM CDT Sat Mar 18 2017/ Latest sfc analysis shows last night's cold front stalled invof KMAF, and return flow has pretty much washed it out. WV imagery shows the upper ridge has moved east over the past 24 hours, and is almost centered over West Texas and Southeast New Mexico.
Mainly VFR expected through the next 24 hours with high pressure moving into the region.
/issued 345 PM EDT Sat Mar 18 2017/ Broad upper level ridge dominating the western CONUS will gradually shift east this weekend while trough over the northeast coast exits the region. This trough will bring weak front over South Florida on Sunday.
Shallow cold front working SE across the northwest deserts will continue to phase towards the central Wasatch Front this eve before stalling and washing out. Another disturbance will ride across the flattened ridge through Idaho Sunday afternoon which could set off a few showers along the Idaho border late in the day. Temperatures across northern Utah will be down about 3-6 degrees Sunday compared to today, while only 1-3 degrees cooler in the south.
Elsewhere across the lower elevations of southeast CO conditions will be near critical, but winds will come up just shy of meeting the wind gust criteria. For tonight, with the ridge overhead expect little in the way of clouds tonight with unseasonably warm temps. Lows will only get into the 40s and 50s on the plains and 20s and 30s across the higher terrain. Record warm temps will be possible (likely?) tomorrow across the region as the ridge moves to the east and the westerly low level gradient picks up a bit over the area.
Weak cold front stretches from south central Alabama northeast through central Georgia. Clearing conditions are expected this evening as the weakening cold front clears the region and the associated storm system moves eastward. Surface ridging will begin to nose into the region behind this system, yielding tranquil conditions and cool temperatures tonight.
813 PM CDT Sat Mar 18 2017 A slowly retreating warm front was located from SW AR across E Central to NW OK early this evening. Surface observations show warm front positioned just north of the Red River Valley and will gradually move northwards tonight and tomorrow. A few showers and thunderstorms will be possible overnight tonight over the higher terrain in NW Arkansas as the warm front moves northward and increasing low-level jet.
632 PM CDT Sat Mar 18 2017 228 PM CDT No real big concerns through the period as high pressure to the west is expected to build overhead later tonight into Sunday. Clearing skies still anticipated into Sunday, while warmer air mass advects into the region. As high pressure shifts to the east during the day Sunday, southerly winds will pick up while temps rise into the 50s. This will assist in keeping temps cooler in the 40s for locations near the lake.
Skies will slowly clear on Sunday with highs rebounding into the middle 40s over south central Lower Michigan to the lower 50s into west central Indiana.
623 PM CDT Sat Mar 18 2017 At H5 large closed low centered over Juneau and quasi blocking pattern over the Great Lakes with broad trough extending into the southeast CONUS. Between these two systems is a large warm dry ridge of high pressure extending from Mexico through the northern plains into central Canada. Cold front will move through dry with stronger winds in the west.
/ISSUED 859 PM CDT Sat Mar 18 2017/ Still looking for increasing clouds and some fog development overnight (dense fog advisories might be needed) with low temperatures expected to bottom out in the lower to mid 60s inland and in the mid to upper 60s at the coast.
Low Pressure over the Great Lakes will drift east tonight. allowing high pressure over the Central Plains to build across Indiana for Sunday. This will end the weekend on a dry and warmer note.
Unseasonably warm weather will continue through Sunday with upper level ridge axis shifting eastward across the state. There is a weak wave passing to our north Sunday morning which knocks the ridge down slightly, increasing westerly flow aloft.
Warm front will move across the area tonight with warmer lows expected, especially south and west. A warm front across eastern Montana this afternoon will propagate east across North Dakota tonight and occlude. A mild overnight is favored tonight given the warm airmass and increased mixing with the passage of the aforementioned front with widespread lows above freezing. Despite cold air advection, most of western and central North Dakota outside of the far southwest may actually see warmer temperatures on Sunday compared to Saturday thanks to greater mixing.
745 PM EDT Sat Mar 18 2017 Low pressure moves south and east of the area tonight and Sunday.
Moist SW flow aloft ahead of an upper trough and cold front was bringing showers primarily over the higher terrain of SE Oregon and SW Idaho. The cold front is located in Eastern Oregon near Baker City and Burns. Most of the showers are expected along the front and over the higher terrain through Sunday. Temperatures will be cooler on Sunday (but still slightly above normal), especially in areas north of the front such as Baker County.
736 PM EDT Sat Mar 18 2017 Upper level low drops southeast tonight to the mid Atlantic coast.
High pressure is building into the area but seas will be chaotic due to mixed northwest and southwest swell. High pressure will weaken Sunday.
605 PM CDT Sat Mar 18 2017 Surface and H8 ridge will move east of CWA during the evening and overnight period, allowing southerly flow to return to the area, impacting temperatures and low level moisture. Records are in the lower 80s, thus though well above normal for mid-March, not record setting. Front will move south of the area overnight Sunday, placing enter CWA on the cold side of the surface frontal system, and thus temperatures will trend cooler.
High pressure over the OH Valley has kept winds out of the north and allowed for cooler and drier air to stream into the region. The high is expected to shift east through the night and winds will begin to switch to a more E/SE direction after midnight. As the 500 mb ridge shifts into the TN and lower MS valley on Thursday, a vast area of south-southwest flow in mid levels will develop across much of the southern and central U.
410 AM EDT Thu Mar 23 2017 High pressure building eastward will cause very cold conditions overnight yet also somewhat milder temperatures Thursday. At 155 PM, the last of the lake effect flurries is drying up at this time as high pressure builds eastward and winds shift. Warm air surging above the colder surface early Friday will cause pockets of freezing rain. With surface temperatures likely rising after midnight, we believe any freezing rain will be light and short-lived.
129 AM EDT Thu Mar 23 2017 High pressure building eastward will cause very cold conditions overnight yet also somewhat milder temperatures Thursday. At 155 PM, the last of the lake effect flurries is drying up at this time as high pressure builds eastward and winds shift. Warm air surging above the colder surface early Friday will cause pockets of freezing rain. With surface temperatures likely rising after midnight, we believe any freezing rain will be light and short-lived. A complex system and tricky forecast in the short term as warm air and moisture push up into the area behind a blocking high over New England. This allows for the chance of some freezing rain into Friday morning before a big push later in the day pushes the cold air to the east.
400 AM EDT Thu Mar 23 2017 Continental polar high pressure will continue to modify over the srn Middle Atlantic states through tonight. A warm front will retreat north across the region on Fri, as the high drifts east toward Bermuda. 1034 mb high pressure now centered over ern PA and NJ will build south to the srn Middle Atlantic coast by this evening, beneath building heights aloft downstream of a progressive and increasingly amplified longwave ridge axis approaching from the central U. will allow a warm front to retreat north through central NC during the day Fri. The increasing low level moisture values, and broad WAA regime, will favor a scattering of flat/fair weather cumulus trapped beneath a subsidence inversion hat will have become established courtesy of mid-upper level ridging aloft.
The Canadian was likely an influence in some of the higher QPF values over the CWA, but it appears this model may be an outlier.
High pressure will build across Arkansas overnight and Thursday. Lows tonight look good in the lower 40s to lower 50s. Tonight Through Friday Night Much cooler conditions are ongoing across the entire CWA this afternoon compared to the previous couple days thanks to the cold front that pushed through the state last night. the cold front will lift back north as a warm front. with much warmer temps expected. which may result in higher moisture at the low levels. will increase if the low level moisture levels end up being higher than currently expected.
With the warm moist flux, temperatures are expected to be warmer tomorrow. am currently keeping it above freezing for the most part.
With winds shifting out of the south by noon today, temperatures are expected to rise into the low to upper 60s. Weak ridging will allow the warming trend to continue into Friday afternoon when temperatures in the low to mid 70s will be common. A low pressure system will sweep across the central U.
304 AM CDT Thu Mar 23 2017 An upper level ridge is currently spreading east into the area early this morning. Warm air advection and isentropic lift are spreading across the area ahead of the upper level ridge. Warmer conditions will occur today as the ridge spreads over the area and clouds clear from west to east this afternoon. An upper level trough currently across the southwestern U. will spread east and close into an upper level low across the central Plains tonight into Friday morning.
These models show convection developing along the dryline, roughly along or close to the Highway 83 corridor. The other models partially mix the dewpoints lower, which seems reasonable given the southwesterly momentum in the lower levels of the atmosphere.
510 AM CDT Thu Mar 23 2017 A narrow band of showers and even a few thunderstorms has developed along an elevated warm front along the Mississippi River. Negative showalter indices accompany the leading edge of the warmer air aloft. The latest hrrr/ruc/nam all develop this area of showers southeast to the Lower Ohio Valley this morning.
Surface cold front, analyzed just off the Florida coast, will continue to slowly push southward and dissipate later today.
Low cloud satellite imagery shows stratus developing over the western portions of the Lower Rio Grande Valley. Low pressure deepening over West Texas will lead to strong gusty winds over the region today with gusts over 30 knots this afternoon for most areas.
655 AM EDT Thu Mar 23 2017 Continental polar high pressure will continue to modify over the srn Middle Atlantic states through tonight. A warm front will retreat north across the region on Fri, as the high drifts east toward Bermuda. 1034 mb high pressure now centered over ern PA and NJ will build south to the srn Middle Atlantic coast by this evening, beneath building heights aloft downstream of a progressive and increasingly amplified longwave ridge axis approaching from the central U. will allow a warm front to retreat north through central NC during the day Fri. The increasing low level moisture values, and broad WAA regime, will favor a scattering of flat/fair weather cumulus trapped beneath a subsidence inversion that will have become established courtesy of mid-upper level ridging aloft.
A ridge will build in behind the front tonight and continue to slide over the area the area on Thursday. Overall cooler over the next 24 hours.
516 AM EDT Thu Mar 23 2017 High pressure will build across the region later today through tonight then move east Friday. A warm front will cross the region Friday with a cold front crossing the region Friday night. High pressure will build across the region later today through tonight then begin to move east of the region later tonight. The pressure gradient between low pressure across the maritimes and building high pressure will keep gusty northwest winds today with gusts of 30 to 35 mph expected. High temperatures today will range from around 20 to the lower 20s north, to the mid to upper 20s Downeast. Strong high pressure will move off the East Coast Friday Morning. A strong southwesterly flow will develop behind the departing high pressure system. Snow will then end Friday night as a cold front moves through.
Surface analysis early this morning places a warm front from the Texas/Oklahoma Panhandle back through the Red River Valley and southeast into Louisiana.
420 AM EDT Thu Mar 23 2017 High pressure with warmer temperatures today. Warm front tonight into Friday morning.
A storm system will bring a chance of showers and thunderstorms today along with much cooler temperatures and gusty winds. A few lingering showers this evening NE of Tucson, otherwise clearing conditions from west to east as the upper trof moves through New Mexico. Cooler air mass under mostly clear skies will result in chilly low temperatures Friday morning with the usual cold spots around or slightly below freezing. Upper ridge builds over the area on Friday for a rebound in high temperatures to near normal values.
As the warm front has moved east this evening the lower clouds have pretty much cleared out of the James River Valley.
Baker High pressure will dominate the sensible weather through the short term period. The center of the high pressure will move eastward overnight into the Middle Atlantic, shifting the winds to an easterly direction. Cooler (slightly below normal) high temperatures are anticipated for Thursday.
A low pressure system is expected to move through the area over the weekend. Otherwise, appears the main weather maker during this period will be an upper low that is currently moving into the southwest parts of the country.
145 AM EDT Thu Mar 23 2017 Warmer temperatures will be in store beginning today as a warm front approaches the region and brings a chance of showers with it later tonight. Afternoon highs will range from the middle 40s in south central Lower Michigan to the lower 50s into central Indiana. Rtn flow ramps appreciably Thu aftn as low level thermal ridge across the srn plains advances northeast. Brief window of forcing centered around 00Z mainly north and west timed with nwd progression of warm front otherwise mid level cap expected to hold. Thus given adamant slower progression aloft expect warmer temps will manifest within broad warm sector Fri- Sun. Best shower chcs indicated Sat aftn/overnight ahead of sfc occlusion and again Sun underneath upper low tracking overhead. Crossover dewpoint temperatures in the lower/middle teens to assure no issues with morning br.
655 AM EDT Thu Mar 23 2017 High pressure with warmer temperatures today. Warm front tonight into Friday morning.
Northeast Montana will see limited effects from the open trough that mostly undercuts our area. A broad cold frontal boundary will force storms from Mexico to southeast Montana to Minnesota today. An upper ridge moves in late tonight and Friday.
348 AM CDT Thu Mar 23 2017 Water vapor imagery showing upper ridge in eastern portions of the region with upper trough sliding east across the Great Basin. Will keep small precip chances going for northwestern areas tonight with convection likely to fire in far western Kansas late this afternoon and trajectories giving some chance for this to reach the local area, and with upper trough emerging into the state late in the night. Ample shear is in place to work with what does develop, so still a bit of a wait and see for coverage and strength of storms given placement of the low and northward progress of the instability. Highs should still reach into the low 70s.
300 AM EDT Thu Mar 23 2017 Temperatures will run below normal through early Friday as cool high pressure holds across the area. A warming trend will begin Friday afternoon through the weekend, as a low pressure system slowly approaches from the west.
1223 AM CDT Thu Mar 23 2017 158 PM CDT Warm advection will kick in tonight as cool high pressure exits to the eastern Great Lakes region. Mid and high clouds from low pressure off the CA coast will stream east-southeast over the area tonight over a flattening ridge across the plains. With the increasing clouds expect temps to hold a tad warmer than last night. The developing warm front will shift northeast across the area later Thursday and Thursday night. Weak upper ridging and southeasterly flow maintaining drier lower level conditions will preclude more widespread shower activity. KMD 330 PM CDT Theme of the extended is a jump to much warmer temperatures Friday.
The large-scale pattern features split upper-level westerlies over the continental United States, and a sharp ridge extending from Mexico to Canada. This ridge supports a robust surface anticyclone currently centered over Pennsylvania and extending south to central Florida. The southern flank of this system is associated with a sharp MSL pressure gradient and a remnant, weak convergence zone once associated with a midlatitude trough/front (but no longer). The lower Florida Keys should remain mostly sunny and rain free today.
525 AM CDT Thu Mar 23 2017 An upper level ridge is currently spreading east into the area early this morning. Warm air advection and isentropic lift are spreading across the area ahead of the upper level ridge. Warmer conditions will occur today as the ridge spreads over the area and clouds clear from west to east this afternoon. An upper level trough currently across the southwestern U. will spread east and close into an upper level low across the central Plains tonight into Friday morning.
118 AM EDT Thu Mar 23 2017 High pressure over the Northern Lakes will move SE across the lakes and move off the SE coast Thursday night. This will allow a warm front to lift NE of the area early Friday. An upper level low will drift across the Central Lakes this weekend. as high pressure will shift across the forecast area. The high centered over Southern Lake Superior will reach Central PA by daybreak. Models continue in good agreement moving the high off the East Coast Thursday night. This will allow a warm front to lift NE across the forecast area Thursday night. And since models tend to over forecast precip with warm fronts.
The Northern Rockies will experience a great spring day today thanks to a cut off low pressure system developing well to our south in the southern Great Basin and 4 corners region. This will allow for a shallow ridge of high pressure to hover over the area and bring stable conditions through mid day Friday. The closed low will have moved into the plains states resulting in weakening of the ridge and allowing another weather disturbance to push into the northern Rockies during the day.
A ridge of high pressure will remain in place over the Southeastern Atlantic coastal states while a trough advances toward the Mississippi Valley.
Some accumulating snows should also extend east along the I-80 corridor into the far southwestern Neb Panhandle but amounts less with a little warmer temperatures. Will still have to watch that area as heavier snow could occur if temperatures turn out a little cooler than expected. Conditions will improve during the day Friday as the surface/upper lows move into the Kansas/Oklahoma area with clearing skies and subsiding winds. Short upper ridge moves across Friday and Friday night boding for clear and dry weather. A series of upper level low pressure systems will keep the weather relatively active for southeast Wyoming and western Nebraska Panhandle through the weekend.
Mild and dry conditions are anticipated today as high pressure briefly builds in over the state.
Upper air analysis last evening showed a ridge over the middle of the country and a trough along the west coast. At the surface, a cold front stretched from central Utah to the northern Baja Peninsula. closer to home, high pressure was centered over the Gulf and winds across our CWA were from the southeast. An upper level low will close off as the west coast trough moves to the east. As the cold front moves through our area it will bring showers and thunderstorms starting across the north this evening spreading across the rest of the area overnight and into Friday.
An upper level ridge will be on the move from the plains states into the eastern third of the nation through the period with a trailing deep upper trough.
635 AM EDT Thu Mar 23 2017 Cooler temperatures and fair weather expected through Friday as high pressure settles into the region. Upper ridge to the west and resulting northwest flow aloft. Cold advection today should result in temperatures about 10 degrees cooler than yesterday. The high will begin to slowly weaken and shift slightly east Friday, providing some moderation in temps/dewpoints. Upper ridge over the area and strong subsidence expected. Temperatures should warm back into the low 70s.
403 AM EDT Thu Mar 23 2017 Cooler temperatures and fair weather expected through Friday as high pressure settles into the region. Upper ridge to the west and resulting northwest flow aloft. Cold advection today should result in temperatures about 10 degrees cooler than yesterday. The high will begin to slowly weaken and shift slightly east Friday, providing some moderation in temps/dewpoints. Upper ridge over the area and strong subsidence expected. Temperatures should warm back into the low 70s.
Today and tonight: A flat ridge of high pressure strengthens over the region today giving the Inland NW a well deserved break from the wet weather. A warm front lifts into the region starting tonight with thickening clouds and widespread precipitation developing around midnight across much of Central WA. There may be some localized shadowing around Wenatchee given the flow pattern descending off Mission Ridge.
329 AM MDT Thu Mar 23 2017 Current surface map shows low deepening across eastern Colorado with inverted trof extending northward along the Wyoming/South Dakota border. Upper trof moving across the western U. Jet streak rotating out of trof will lifts into western South Dakota today. As upper low tracks into the central plains on Friday, focus for precipitation shifts southward tonight and Friday.
124 AM EDT Thu Mar 23 2017 Cooler temps and fair weather expected through Friday as high pressure settles into the region.
934 AM EDT SUN AUG 28 2016 High pressure will move east of the area today. A cold front will approach Maine and New Hampshire tonight and move off the coast monday morning.
A unseasonably strong low pressure system will continue to move east across northern Arizona today, and into New Mexico tonight. However a drier and cooler airmass will spread across the area today and Monday, with afternoon temperatures near or slightly below normal.
Monday still looks about 5 degrees warmer than today as upper winds change from westerly to southwesterly.
1025 AM EDT SUN AUG 28 2016 High pressure will persist over the region through today.