Aikyam-Lab/Synoptic-Bench huggingface dataset:
Satellite shows upper level trof dropping south about 40 mph off the Washington coast. Short range models in good agreement in bringing trof across the inland northwest overnight and Monday. Another short wave trof will move rapidly southeast across the area Monday night with another shot of snow. Snow levels are less than 1K feet, but with temperatures rising to above freezing during the day in the lower elevations, this should keep snow accumulations in check for the most part. Road/soil temperatures have rebounded and with a stronger sun shining through the clouds, roads in the lower elevations will be mostly wet or slushy during the day, but likely freeze at night.
Expect temperatures today to be 3-5 degrees warmer than yesterday on average. Southern areas will remain coolest over the snow cover, but should climb a few degrees above freezing to begin the next round of snowmelt. Light winds and mostly clear skies over the deeper snow should provide for good optimal radiative cooling, and could see some light fog develop as temperatures quickly drop back into the lower 20s and teens this evening and overnight. Have a mention of freezing drizzle on the far western fringes of the pops, but am not sure the saturation will be deep enough there to result in accumulations. Have also added the mention of fog with the low level saturation.
401 AM CST Sun Feb 26 2017 Center of high pressure is quickly moving east/southeast of the area this morning with return flow already developing to our west. Weak upper level disturbance noted across Kansas will trek east today and bring the southern half of the CWA a good chance of light rain showers late this afternoon and this evening as a weak inverted trof develops across the Ozarks. Southwest flow aloft will be present across the region early Monday with a broad and relatively low amplitude long wave trof centered in the far western U.
A short wave shows up nicely in the water vapor imagery along the MN/Canada border with another wave through KS associated with the jet through the base of the broad CONUS trough. Weak high pressure will cross the MO River into Iowa tonight with light and variable winds turning southerly into early Monday morning.
951 AM EST Sun Feb 26 2017 Cool and dry high pressure will build over the area today. Moisture returns Monday as the area of high pressure moves off the coast. A cold front will cross the region around the middle of the week bringing a chance for showers and thunderstorms. Cool high pressure will build into the region today with a very dry air mass in place. As the area of high pressure shifts east to the coast overnight.
1033 AM EST Sun Feb 26 2017 Cool high pressure with critical RH will build into the region today, then shift offshore tonight and early this week, as a warm and moist air mass gradually builds from the Atlantic and Gulf of Mexico.
However, much of this precipitation early this morning was likely struggling to reach the ground due to the low-level dry air in place. While there were still some model discrepancies with regards to whether or not this mid-level moisture will saturate low enough for precipitation to reach the ground, enough models were showing this moisture overcoming the low-level dry air. Temperatures this morning will continue to hover near the freezing mark before moderating into the upper 30s/low 40s by mid/late morning. This scattering cloud cover combined with west/southwesterly winds this afternoon will allow temperatures to quickly rise into the low 50s across much of the CWA. Will also have a chance for rain showers with a focus in eastern KS as the warm front lifts north through the area with a zone of focused isentropic ascent shifting north along with the front.
Cold upper trough will carve out a position over the Pac NW through Monday. Energy dropping into the trough along with afternoon instability will keep a chance of showers over much the area, though the focus of more continuous snowfall will be across the east-central Oregon and central Idaho mountains. Any snowfall Sunday night in the lower basins and valleys will be sporadic and light, with less than an inch for sites that see snow. Winds pick up today ahead of the trough, adding a windchill to the well below normal temperatures.
/issued 357 AM CST Sun Feb 26 2017/ The surface anticyclone has settled over the Mid-South early this morning, resulting in light and variable winds. Moisture will increase with time as southerly flow persists, resulting in warmer overnight lows and fueling the upcoming rain chances. Temperatures will be warmer across the region this afternoon, with highs generally in the mid 50s to near 60 degrees.
520 AM CST Sun Feb 26 2017 For the 26/12z TAFs, VFR conditions should prevail at all sites through at least 27/00z, but clouds will be increasing through the period as an upper trough approaches the region. A weak warm front will shift north allowing for a chance of thunderstorms overnight across much of the region.
911 AM EST Sun Feb 26 2017 It'll be blustery and noticeably cooler today behind a departing cold front. A weak trough will cross the area later today and that may produce a few mountain snow showers. Low pressure passes to our north late tonight and Monday and will introduce warmer air once again to the region. The trailing cold front will cross the area late Monday. a surface cold front had just exited the coastline. Diminishing winds and clearing skies this evening as weak ridging takes hold. Any rain or snow showers with this boundary should be confined to the higher terrain.
Otherwise the day will be uneventful aside from some pockets of morning fog as weak high pressure moves over North Dakota today, with a little cooler airmass nosing into northeast South Dakota. Across western/southern counties, westerly low level flow and 925mb temperatures of 0 to +2C will result in highs in the low 40s, while the northeast will see those readings closer to -2 to -6C resulting in highs in the low/mid 30s.
A ridge of high pressure will shift east of the forecast area early today, with southerly low-level winds pushing today's highs to around 50 degrees. Transition of the southern stream into more of a southwest-northeast configuration is starting this morning, as one upper low drops southeast from San Francisco and a second settles southward toward northwest Washington state. This will bring a couple days of very mild air once again, but no chance of it lingering as long as last week, as a broadening trough tracks east across the Plains during midweek.
The backdoor cold front will lose steam as it heads towards the Missoula area tonight, with gusty east winds at Hellgate Canyon.
Another closed low is sinking south along the Pacific coast. At the surface, high pressure resides across North Dakota with weak low pressure across central Montana. Weak upper ridging and low-level west-southwesterly flow will bring drier and slightly warmer weather to the area. Weak area of low pressure will track from Montana through North Dakota today, bringing some breezy westerly winds to northwestern South Dakota. Weak ridging shifts east as trof develops across the Pacific Northwest. Weak surface trof moves across Northeast WY and western SD by the afternoon with southerly winds ahead of it, and winds turning northwest behind it.
456 AM CST Sun Feb 26 2017 Center of high pressure is quickly moving east/southeast of the area this morning with return flow already developing to our west. Weak upper level disturbance noted across Kansas will trek east today and bring the southern half of the CWA a good chance of light rain showers late this afternoon and this evening as a weak inverted trof develops across the Ozarks. Southwest flow aloft will be present across the region early Monday with a broad and relatively low amplitude long wave trof centered in the far western U.
Afternoon highs today will be in the low to mid 70s under mostly cloudy skies. Given the expected cloud cover encompassing the entire CWA by tonight, morning lows tomorrow will be warmer, in the the upper 40s to around 50 degrees.
112 AM EST Thu Feb 16 2017 A deep upper level trough along the eastern seaboard will lift offshore into the Atlantic tonight.
1019 PM CST Wed Feb 15 2017 Little in the way of cloud cover expected through Thursday, with relatively light southerly flow shifting around to the west later tonight as a warm front moves east across the forecast area. The light winds and clear skies should allow for decent radiational cooling tonight, with lows a few degrees below freezing for most of the area.
High pressure aloft will maintain dry and mild conditions across the region tonight. An upper level ridge remains in place across Utah this evening while a trough approaches the West Coast. Until the trough ejects across northern Utah beginning late tomorrow afternoon, dry and stable conditions will persist. However, these clouds combined with increasing southwesterly flow aloft and the continued warming of the airmass are expected keep overnight mins a bit warmer tonight. The trough will bring light valley rain and mountain snow to the area tomorrow night, mainly across northern Utah.
This wind shift and warmer air aloft will effectively end any lake effect potential for all areas of the U. ridging builds back into the area. In the extended, GFS and ECMWF show a 500 mb ridge over the central U. This ridge amplifies as it moves into the upper Great Lakes 12z Mon. The warm air associated with the ridge gets pushed further south with time as colder air makes a return to the area on Thu. We are on the southern edge of the colder airmass as a cold front moves through on Wed. Late Tue night and early Wed morning, looks like there could be a little freezing rain possibility with temperatures slightly below freezing.
This ridging surface and aloft will maintain dry weather through tonight and begin and warming trend. Under full insolation and a light wind, temperatures today will top out slightly warmer than normal. Strong radiational cooling tonight will send temperatures back into the 30s over the eastern half of Mississippi but weak waa in the west will hold temperatures slightly above normal in the lower 40s.
242 AM EST Thu Feb 16 2017 High pressure will move across the area today providing fair weather with temperatures slightly warmer than yesterday.
Crystal clear skies are expected today with confluent upper-level flow over the forecast area downstream of split flow over the Plains and upstream of a trough over the Northeast. At low-levels, northerly flow will be in place initially between high pressure over Texas and low pressure lifting into Nova Scotia. Low-level flow will begin to transition to westerly by afternoon as high pressure slides towards the Gulf Coast, allowing high temperatures to moderate into the 60s for most.
High pressure currently centered over SE Texas will slide across the Gulf Coast over the next 24 to 36 hours while ridging builds aloft.
300 AM EST Thu Feb 16 2017 A ridge of high pressure will remain in place across the region for the next few days, bringing warm and dry weather to eastern Kentucky. Scattered to broken low and middle level clouds will move across the today, as a northwesterly flow aloft, associated with a large area of low pressure aloft currently centered over New England, sends a surge of moisture off the western Great Lakes across the area.
338 AM CST Thu Feb 16 2017 A warm front will lift northeast through the area today as mid level ridging builds in the plains. This will bring the return of southwest winds and much warmer temperatures. Skies are currently mostly clear, but satellite loop and HiRes models indicate that a large area of cirrus will be streaming over the top of the ridge and will advect over the CWA during the day and into tonight. Expecting afternoon highs to range from around 50 in northeast to the lower 60s in the southwest. Tonights lows should range from the mid 30s in the north to the low 40s in the southwest.
312 AM CST Thu Feb 16 2017 An upper level low pressure system, currently edging east-southeast along the west coast of Mexico near Los Mochis, will punch northeast later today all the way to near Fort Davis, Texas. The upper low is fairly vigorous, as apparent by the tight spin and ongoing thunder activity over northwest Mexico at this time. RMcQueen The upper low currently over the Gulf of California will push east of the FA by later tomorrow. This low will bring with it a weak front.
400 AM EST Thu Feb 16 2017 A low pressure area off the New England coast will move east into Nova Scotia later today.
Hazardous seas remain in wake of cold front. In its wake will be cooler temperatures, closer to seasonal averages compared to the warmer than average temperatures we have been experiencing the last few days.
High pressure will then build in for the beginning of the weekend with drier and warmer conditions expected. A nearly stationary upper-level low pressure system will continue to enhance cold northwest flow across the area. Further lowering of the dendritic snow growth layer will continue to squeeze out high ratio snow, especially in the high terrain.
If the current forecast pans out for the Houston area, tonight's low temperature at IAH will be the coolest temperature observed so far this month (the lowest through the 14th is 47 degrees on the 10th).
/06Z TAFS/ High clouds from an approaching upper low will be joined by some mid-level clouds late in the period, or as early as 18z at DRT.
Currently, an upper level ridge axis was moving eastward into the western Dakotas with warm air well established off the surface. This very mild air is forecast to remain over our area today as the apex of the upper level ridge moves over the state this afternoon. Therefore, even though h850 temperatures of +12 to +14 are forecast over western and central ND today, suspect the low level inversion will be maintained again today. and lows in the low to mid 30s over western ND.
An upper level low pressure system over northern Mexico will draw a gusty morning drainage wind through Santa Fe on Thursday. As a ridge of high pressure slowly builds in from the northwest, temperatures will continue to trend up Thursday.
High pressure will move in from the west this afternoon bringing clearing skies and seasonable temperatures.
Currently, a warm front extended through the Dakotas into western IA with scattered to broken warm air advection mid/high clouds moving southeastward across the forecast area.
High pressure will then build in for the beginning of the weekend with drier and warmer conditions expected. A nearly stationary upper-level low pressure system will continue to enhance cold northwest flow across the area. Further lowering of the dendritic snow growth layer will continue to squeeze out high ratio snow, especially in the high terrain. Building high pressure should end the snow showers later on Thursday and keep temperatures slightly cooler than average.
along with warmer temperatures by the weekend. mid/upper level low will be located over eastern Canada by 18z with deep cyclonic northwest flow across our cwa. mid/upper level ridge builds overhead, resulting in benign weather.
1120 PM CST Wed Feb 15 2017 The latest surface analysis indicates weak high pressure from the Southern Plains northeast thru the lower Great Lakes this evening. High pressure will continue to dominate Central Illinois and much of the Midwest through the overnight hours. Very little in the way of cloud cover, and light variable winds under the ridge axis. Overnight, the ridge slips eastward and winds become more southerly. Morning upper air and moisture channel imagery shows main upper trough from eastern Great Lakes into KY/TN.
1210 AM EST Thu Feb 16 2017 Low pressure will move off the coast tonight as high pressure then builds back into the region.
353 AM EST Thu Feb 16 2017 Weak high pressure will briefly build into the area today.
The enhancement is in large part due to a N-S oriented vort max (located on the backside of a digging trough) plunging into the area, evident on WV imagery. Expecting this lake effect activity to more or less continue with its present intensity over the next few hours, then markedly diminish in intensity and coverage between 06-12Z as temperatures aloft and 1000-500mb thicknesses start to rise due to ridging aloft. Pattern Forecast: Rising heights in the coming days as upstream ridge builds eastward into the Great Lakes.
347 AM CST Thu Feb 16 2017 An upper level ridge over the region today will bring abnormally warm temperatures to the area.
304 AM EST Thu Feb 16 2017 A deep upper level trough along the eastern seaboard will lift offshore into the Atlantic tonight.
308 AM CST Thu Feb 16 2017 Mid/upper level ridging will take place through the MS/OH River Valleys during the next 24-48 hours.
227 AM CST Thu Feb 16 2017 Little change with clear skies and light northwest flow as high pressure moves in. Upper ridging to move in late this week bringing more dry weather the next several days with warmer temps into the 50s and 60s for highs this weekend. Most locations should be within 3 degrees though NE sections of forecast area may tend 3+ degrees cooler if BL mixing is a bit delayed. mostly sunny to sunny with some passing high clouds and significantly warmer by 10 degrees NE to 20 degrees SW. Expecting highs in the mid/upper 40s far northeast into the lower 60s in the southwest 1/3 of the forecast area.
/22/ Surface ridging continues to build into the area beneath NW flow and troughing aloft. The pressure gradient remains tighter east of the I-55 corridor, so sustained winds and greater mixing have limited faster cooler so far, however winds are expected to relax in the east as the ridge strengthens across the CWA.
403 AM EST Thu Feb 16 2017 Low pressure will pull away today leaving behind upslope snow showers in the mountains after snow ends this morning elsewhere.
/issued 914 PM CST Wed Feb 15 2017/ Wx map shows high pressure continuing to settle over the region, with winds diminished to less than 5 mph south of the I-10 corridor, calm elsewhere.
314 AM EST Thu Feb 16 2017 A ridge of high pressure will remain in place across the region for the next few days, bringing warm and dry weather to eastern Kentucky. Scattered to broken low and middle level clouds will move across the today, as a northwesterly flow aloft, associated with a large area of low pressure aloft currently centered over New England, sends a surge of moisture off the western Great Lakes across the area.
256 AM EST Thu Feb 16 2017 A warm up begins today as a sharp upper level ridge moves into the region.
long wave trough should bring mostly dry air and sunshine to the area today. High pressure will be edging farther east through the southeastern states in an effort to replace the departing upper trough.
342 AM CST Thu Feb 16 2017 Upper level ridging will be invoked over the Ozarks today as strong cyclonic flow persists over the northeastern United States and upper level low pressure slowly approaches southern Texas. Brisk and gusty southwest winds will develop at the surface with strong warm air advection commencing in the low levels of the atmosphere. We went on the high side of temperature guidance today with highs warming into the middle to upper 60s. We have therefore again gone warm with temperatures with lows ranging from the upper 30s over the eastern Ozarks to the lower and middle 40s over western Missouri and southeastern Kansas.
1211 AM EST Thu Feb 16 2017 Aviation a ridge of high pressure will move over the state tonight. We'll see snow showers begin to diminish as drier and warmer air aloft arrive.
The exception is the Lower Treasure Valley and areas in southern Baker County and northern Malheur County where cold air is trapped and thus, the snow level is lower. However, these locations are expected to experience freezing rain as warmer air moves on top of the inverted cold air overnight tonight. By mid day, the areas of freezing rain should transition to rain. The Freezing Rain Advisory remains in effect until 11 am MST. At 03Z light rain or freezing rain in eastern Oregon north of KLMT-KEUL and western Idaho west of KMYL-KBOI, with leading edge shifting ene about 20 kts.
1129 PM EST Wed Feb 15 2017 Northwest flow as a result of a low pressure system on the East Coast will continue overnight tonight, but winds will change to more southerly Thursday as high pressure moves into the region with drier air.
Sely winds will develop for the afternoon as the high moves east and a warm front develops across IA and IL. The warm front will slowly approach tonight with temps only dropping into the upper 20s to lower 30s.
Clear and dry conditions will prevail with cooler temperatures. Lows tonight will be a few degrees below normal with readings falling into the mid and upper 30s inland to the lower 40s coast.
325 AM CST Thu Feb 16 2017 At H5 Closed low over Northeast CONUS. Upper ridge has shifted east covering the western half of the CONUS and extending northeast to the Hudson Bay. Closed low off Pacific Northwest. Upper ridge with very warm air has moved east over all of western nebraska. Mostly sunny skies today with west to northwest down slope flow will have temperatures climbing into the low 70s over most areas. Southwest flow tonight will keep boundary layer mixed and hold temperatures in the lower 30s. High pressure due to high amplitude ridge across the western US will result in dry and warm conditions through the weekend.
VFR conditions will continue through the night and during the day on Thursday as high pressure builds into the area.
1032 PM MST Wed Feb 15 2017 Upper ridge covers the western CONUS. With high pressure over the northern plains, skies are mostly sunny. The upper ridge will gradually move over the central states, with warm and dry weather continuing, along with mostly sunny skies and west-southwest surface winds.
743 AM EDT SUN JUN 19 2016 As the ridge to our west retrogrades and intensifies a trough will eventually develop over the eastern United States. Ahead of the developing trough the next two days will be warmer than normal.
Chattanooga Airport, TN 89 64 89 67 / 0 0 10 10 Knoxville McGhee Tyson Airport, TN 88 63 87 64 / 0 0 10 10 Oak Ridge, TN 89 63 87 64 / 0 0 10 10 Tri Cities Airport, TN 85 56 84 62 / 0 0 10 10.
Then, an upper level inverted trough, seabreeze, and other surface boundaries will interact with increased moisture (PWS rise to near 2 inches over southern parts of our area) to generate isolated to scattered showers and thunderstorms today and Monday.
1049 AM EDT SUN JUN 19 2016 High pressure will persist over the area through Monday.
perhaps along a subtle low level convergence zone with dewpoint pooling or perhaps very weak inverted trough in the area and/or steepening lapse rates in the mid levels of the tropsphere due to radiation flux or a combination.
444 AM PDT SUN JUN 19 2016 Expect drier and warmer weather today and Monday as a ridge of high pressure builds over the Inland Northwest. A series of weather disturbances will move through the region and dampen the ridge.
1226 PM EDT SUN JUN 19 2016 Warm and dry conditions will persist today as a ridge of high pressure dominates the weather across the region. A cold front is expected to drop into the area Monday afternoon into Monday night bringing scattered showers and thunderstorms.
Temperature will be cooler today and around 80. Temperatures will be cooler with limited moisture due to a cold front that made its way across SE Montana during the overnight hours. Low pressure at the surface has slowly moved into SW North Dakota, shifting winds to the west northwest. By Monday, temperatures will start to rebound, maxing out in the low to mid 80s. Upper-level pattern shows a highly amplified ridge extending from the SW CONUS northward into Canada.
1227 PM EDT SUN JUN 19 2016 High pressure is bringing warm and dry weather to the region this afternoon and tomorrow.