Aikyam-Lab/Synoptic-Bench huggingface dataset:
347 AM MDT MON AUG 15 2016 Models were consistent in moving an area of low pressure eastward from northern California to west-central Nevada during the day. Sheared vorticity ejected from the low may sustain shower and thunderstorm activity over eastern Utah later into the evening. High pressure will slowly push east of the area through the middle of the week. As a result, a modest increase of moisture from the southwest will allow for an uptick in precipitation through the remainder of the week with chance POPs over the higher terrain and slight chance in the valleys.
Broad upper trough will slowly move eastward from the Plains into the Mid MS Valley. The southern portion of the upper trough will interact/absorb the remnant disturbance of tropical origin drifting northward from LA with surface reflection tracking northeast along stationary frontal boundary into the Lower Great Lakes by 16/12z. Finally, heat/humidity will remain a factor especially on Tuesday with max HX values expected to peak in the low 100s in the lower Susquehanna Valley.
Alabama will be on the western periphery of an upper level ridge for several days. But that ridge will become more west/east oriented and weaken by the end of the week.
high pressure will continue to build eastward out of the Great Basin with broad northerly flow across Colorado. the high pressure over the Great Basin will shift into the Desert Southwest with continued northerly flow across Colorado. A bit better energy caught under the ridge will shift east into western Colorado by the afternoon.
410 AM MDT MON AUG 15 2016 High pressure ridge aloft remains along the West coast with a Northwest flow aloft over Colorado.
High pressure will bring hotter temperatures and fewer thunderstorms to start the week. As high pressure shifts off to the east, deeper moisture will return along with an increasing chance of thunderstorms the second half of the week. With high pressure building in across Arizona from the west, mid levels have warmed a few degrees and helped to put a cap on things. As high pressure shifts eastward and weakensses in the flow develop northwest of our area over the next 72 hours, we should see deeper moisture nose back in along with better dynamics for increased conditional instability.
351 AM EDT MON AUG 15 2016 Cold front nearly stationary across Western Ohio, as high pressure lingers off East Coast. Surface cold front remains nearly stationary across western Ohio this morning as high pressure is still entrenched to our east.
410 AM EDT MON AUG 15 2016 Waves of low pressure will travel along a slow moving boundary in a very moist airmass today and tonight.
325 AM EDT MON AUG 15 2016 Bermuda high pressure will extend into the Carolinas and Virginia through Tuesday.
High pressure will remain over the Pac NW this week, maintain mid-August like temperatures for the region. Light onshore flow will maintain night/morning clouds along the coast, and locally along the lower Columbia River for next few mornings. Return of much warmer temperatures later this week as offshore flow develops.
At the surface, low pressure is in place in Colorado with several weak trough axis extending over our CWA. Highs should reach the lower 90s for many locations, and warmer end of guidance supports mid 90s based on mixing layer temperatures. High pressure over the southwest will elongate and slide east Monday night and into Tuesday with west to northwest flow aloft.
636 AM EDT MON AUG 15 2016 Waves of low pressure will travel along a slow moving boundary in a very moist airmass today and tonight.
Deep layer ridging will continue to build across the region through mid week, putting the forecast area in an easterly flow regime. Expect POPs to range between 20-40%, with afternoon highs running in the low to mid 90s.
338 AM CDT MON AUG 15 2016 S/WV trough will progress eastward over the region today. With moisture lacking in the lower levels, we anticipate the virga continuing through early afternoon before mid-level cooling shifts north and east of CWA.
648 AM EDT MON AUG 15 2016 Cold front nearly stationary across Western Ohio, as high pressure lingers off East Coast. Surface cold front remains nearly stationary across western Ohio this morning as high pressure is still entrenched to our east.
/Issued 329 PM CDT TUE JUN 14 2016/ Upper level trough continues to lift northeast across the northern/central plains this afternoon. Bigger story this forecast cycle will be the hot weather courtesy of building upper ridge over the Southern Plains.
Low pressure aloft continues to advance over and east of the region with dry high pressure following.
Expect warmer temperatures than yesterday, yet still a few degrees below normal.
Ridge of high pressure aloft over Colorado with dry and stable airmass. Upper ridging has brought warmer temperatures and drier conditions to Colorado today with convective stunted in growth. Look for skies to clear and winds to diminish as the sun sets, with minimum temperatures tonight a few degrees warmer than last night. Look for much warmer temperatures Wednesday as 700 mb temps increase about 4 degrees C.
21 (Wednesday night through next Tuesday) The anticyclonic flow over the top of Texas today will be in the process of strengthening into a broader ridge across northern Mexico and the southwestern U. This ridge will continue to expand and strengthen from Wednesday into the weekend. By this weekend, a weak upper level trough is expected to move east into the ridge weakening it somewhat across the southern half of Texas, allowing for some slightly cooler temperatures, and an outside chance of showers and thunderstorms, but again, not a high enough chance to put a mention in the forecast.
18Z surface data has low pressure in eastern South Dakota. A warm front runs east southeast from the low into southwest Wisconsin and then into northern Illinois. Weakly inferred boundaries were south of this warm front from central Iowa into central Illinois. Dew points were in the 50s and 60s north of the warm front and in the 70s south of the front. Locally heavy rainfall will be possible due to the high moisture content of the atmosphere. It is possible that localized amounts approaching 2 inches may occur roughly in the highway 20 corridor. After midnight, the cold front will sweep through the area.
In association with the upper low over the Northern Plains, some storm development is underway as of 20z across eastern Cherry Co. RAP estimates around 1500j/kg MUCAPE and LI around -3 due to early PM sunshine and cooler H5 temps from the low. attention turns toward the building upper ridge across the Plains. A weak leeside surface boundary sets up along the WY/CO mountains, which turns the low level flow from west to south across western Neb.
1009 PM EDT TUE JUN 14 2016 Low pressure over New Brunswick will slowly move east across the Gulf of Saint Lawrence through Wednesday. A ridge of high pressure will then move in late in the week with gradually drier conditions. sunnier and warmer conditions for the region. breezy NW winds will cont til Wed aftn, and with a little more in sunshine, fcst hi temps should be at least 5 deg warmer than tdy. Both winds alf and the sfc pres grad lessens Wed ngt for lighter winds and perhaps some radiational cooling for cooler ovrngt lows spcly ovr wrn vlys.
Lows are still projected to be in the low-mid 70s inland and in the upper 70s near the coast.
750 PM EDT TUE JUN 14 2016 High pressure remains in place through Wednesday night.
Current 20Z Water Vapor shows a modified North Pac Low over the Dakotas with associated warm front extending into the Ohio Valley. Subsidence is settling into the area as the upper trough is rotating through Nebraska with the very southern extent working through northeast Kansas. Therefore, have gone with a mostly dry forecast the remainder of the day with only slight chances of a few showers or storms developing as the upper level trough continues to lift completely out of the area by late this afternoon. Tomorrow, will be warming considerably with the heat index for most locations over northeast Kansas reaching into the upper 90s and low 100s as larger amplitude ridge begins building in just to the west of the forecast area.
With the high dewpoints and warming low-level temperatures over the next few days, heat index values will reach the 105-110 range across much of the area.
1009 PM EDT TUE JUN 14 2016 Under mostly clear skies and light and variable winds, temperatures are in the lower to mid 80s along the Florida Keys. Surface wise, a nebulous ridge lies on the outer waters of Mainland Monroe and into Florida Bay. Hence, clouds should increase but with only dime pops and temperatures remaining in the lower 80s. With a ridge axis lifting north and into the South Florida peninsula, winds will become mostly southeast at 10 knots or less on all Keys coastal waters. South-southeasterly flow will shift and become predominantly southerly by 12z Wednesday as the high pressure ridge axis centered east of the Florida peninsula shifts eastward.
1044 PM EDT TUE JUN 14 2016 High pressure remains in place through Wednesday night.
An upper low remains over the area through the rest of the week, keeping a chance of showers, isolated thunderstorms, and below normal temperatures over the area.
951 PM EDT TUE JUN 14 2016 A warm front will be situated near the area tonight and into Wednesday.
Weak upper trough axis located just west of middle TN today. Moist southerly flow in the lower levels has combined with ample heating to produce scattered showers and thunderstorms across the area. On Wednesday, weakening trough axis shifts to our east.
916 PM EDT TUE JUN 14 2016 High pressure remains in place through Wednesday night.
Readings are generally around 5 degrees cooler than yesterday. A weak trough is shifting east of the area into middle Tennessee.
into the lower 70s and maybe even mid 70s in some places as a band of clouds is trying to move into NW Alabama at this time. At 5h a weak wave was moving across the srn MS river valley while a warm front extended across the Ohio valley.
1105 PM CDT TUE JUN 14 2016 Low pressure rotating through eastern South Dakota this afternoon sparking thunderstorms across southwest Minnesota and northwest Iowa. The upper low will pull east soon enough to allow for convection to be gone before daybreak Wednesday.
Concur with the GFS deterministic that the upper ridge will remain in place over the Region during the period.
914 PM MDT TUE JUN 14 2016 Cold front that swept through the area bringing showers and thunderstorms during the afternoon is now well into eastern MT. The cooler airmass behind the front will allow temps to slip back into the upper 30s to mid 40s overnight. As of 23Z, surface cold front has moved east of KHVR/KLWT taking all the -TSRA along with it.
1042 PM EDT TUE JUN 14 2016 Late evening surface analysis depicts weak high pressure (1016 millibars) centered over the eastern Gulf of Mexico. Aloft, ridging prevails from the Greater Antilles northwestward through the Bahamas, with deep troughing progressing slowly eastward off the New England coast. A subtle low/mid level trough was moving slowly eastward through the deep south, with the southern extent of this feature entering the western FL panhandle. Very humid conditions prevail, with 02Z temps generally in the lower 80s with dewpoints in the mid/upper 70s. The low/mid level trough will bring deeper moisture into inland southeast GA during the afternoon hours, but mid-level temps are forecast to remain relatively warm (-5/-6 C), so widespread severe weather seems unlikely. Afternoon heat indices will again approach 105 degrees as highs reach the low/mid 90s all the way to the beaches.
At 5h a weak wave was moving across the srn MS river valley while a warm front extended across the Ohio valley.
The stronger convection has been firing across SW MN near the warm front and is tracking ENE.
as the persistent trough axis that has lingered over our region has finally shifted E of the MS River. as the upper ridge centered over Cntrl TX this afternoon will begin to expand NE into the area tonight.
This upper pattern has put the CWA under southwest flow aloft with a dryline across the Western Low Rolling Plains, eastern Permian Basin, and the Lower Trans Pecos. Despite the upper ridge getting stronger, low-level moisture will move further west Wednesday afternoon. Temperatures tomorrow will likewise be similar except maybe a few degrees cooler than today.
746 PM EDT TUE JUN 14 2016 Stubborn low pressure continues to slowly drift over the Canadian Maritimes. It will gradually slip off to the northeast through Wednesday as high pressure builds in from the west. Upper low drifts farther E Wed. The core of the cooler air aloft also will be farther E. meaning warmer daytime temps and less diurnal cloud cover. Influences of the upper low diminish even further Wed night.
Lows Wednesday morning will range from the upper 50s in Hamilton county to the lower 70s in Barber county. 500 mb heights build quickly, as the first high pressure cell aloft intensifies over Texas.
Deep layer SW flow on Wednesday is expected as low lvl ridge axis slips south of the FL peninsula. Highs will reach the lower 90s along the coast and near 94 across the interior.
into the lower 70s and maybe even mid 70s in some places as a band of clouds is trying to move into NW Alabama at this time. Additional showers and thunderstorms expected tomorrow and have handled the time frame with the highest chances with a PROB30 group but cannot rule out a stray shower/storm before 19z.
Remainder of the forecast will generally be dry with temperatures warming back into the mid to upper 90s, as upper ridge continues to build into the area. The GFS model seems to be overdoing nighttime convection underneath the ridge and generally preferred a drier Nam/ECMWF solution.
628 PM CDT TUE JUN 14 2016 Low pressure rotating through eastern South Dakota this afternoon sparking thunderstorms across southwest Minnesota and northwest Iowa. The upper low will pull east soon enough to allow for convection to be gone before daybreak Wednesday.
If convection can't develop during the afternoon, then it may take the effects of the low level jet to enhance things ahead of the weak surface boundary. But models are very inconsistent in placing and intensity of the low level jet.
745 PM EDT TUE JUN 14 2016 High pressure dominates across the region tonight into Wednesday with mostly clear skies. High pressure moves out Wednesday as warm front approaches the region from the south and west. Dry through the period with increasing clouds on Wednesday ahead of the aforementioned warm front. Modest inconsistencies among the models handling the warm front and associated precip.
1036 PM EDT TUE JUN 14 2016 High pressure dominates across the region tonight into Wednesday with mostly clear skies. High pressure moves out Wednesday as warm front approaches the region from the south and west. Dry through the period with increasing clouds on Wednesday ahead of the aforementioned warm front. Modest inconsistencies among the models handling the warm front and associated precip.
Dry conditions and relatively cooler/drier air will return to end the work week with more seasonal temperatures. High pressure will provide for a dry weekend with 90 degree readings returning late in the weekend. Will nudge the lows down a bit more in these areas. Models continue to have a tough time nailing down timing for cold frontal passage and associated chance for storms.
A few clouds around 3000 feet remain, however, they should diminish in the evening hours as high pressure builds into the region. Combined with the high humidity, there will likely be scattered fog leading to isolated MVFR/IFR conditions.
Gusty winds may accompany a passing cold front this evening, and so will issue a Lake Wind Advisory until 11 PM MDT to cover that potential. For Wednesday, upper trough remains in place across the Pacific Northwest with diffluent upper level southwest flow across Montana.
Low pressure aloft continues to advance over and east of the region with dry high pressure following. Low pressure aloft continues to advance over and east of the region with dry high pressure following.
Chattanooga Airport, TN 72 90 73 95 / 50 60 40 20 Knoxville McGhee Tyson Airport, TN 70 88 71 92 / 50 60 50 20 Oak Ridge, TN 70 88 72 93 / 40 60 50 20 Tri Cities Airport, TN 68 86 68 89 / 30 60 60 30.
1109 PM CDT TUE JUN 14 2016 Low pressure rotating through eastern South Dakota this afternoon sparking thunderstorms across southwest Minnesota and northwest Iowa. The upper low will pull east soon enough to allow for convection to be gone before daybreak Wednesday.
707 PM EDT TUE JUN 14 2016 A warm front will be situated near the area tonight and into Wednesday.
633 PM CDT TUE JUN 14 2016 Nearly stacked area of low pressure was centered over northeast South Dakota this afternoon with a warm front extending east across southern Minnesota. With cold-core upper low drifting eastward on Wednesday, expect scattered to widespread showers through the day.
An area of low pressure, centered near KABR this afternoon, will continue to pull north and east.
The rest of the area will see increasing southwest wind with many areas high end breezy to windy tomorrow afternoon and early evening and about 5 degrees warmer on average.
Otherwise, warm and dry conditions will continue through the short term, as the upper level ridge expands overhead.
With winds veering to the west behind the boundary and strong closed low passing by to the north and east.
Water Vapor loop shows an expansive closed low along the British Columbia coast. and raised winds in the higher terrain overnight. The deep and unseasonably cold upper trough will remain parked over/near the Pacific Northwest through the end of the week. The western valleys will experience the strongest winds, with speeds generally at the high end of advisory-level criteria.
UPPER RIDGING BEGINNING TO TAKE HOLD OF THE REGION AND WILL BE THE MAIN REASON FOR THE DECREASED THUNDER ACTIVITY. /ISSUED / High pressure will build over SE Texas during the mid and late week period.
One thing to monitor is non- supercell tornadoes that are occurring with a line of thunderstorms across northeast South Dakota along the surface warm front.
The anticyclonic flow over the top of Texas today will be in the process of strengthening into a broader ridge across northern Mexico and the southwestern U. This ridge will continue to expand and strengthen from Wednesday into the weekend. By this weekend, a weak upper level trough is expected to move east into the ridge weakening it somewhat across the southern half of Texas, allowing for some slightly cooler temperatures, and an outside chance of showers and thunderstorms, but again, not a high enough chance to put a mention in the forecast.
The midnight update featured the addition of some isolated showers to the overnight period as a weak disturbance is supporting some development along a northward-seeping warm front. Eastward progress of the aforementioned trough should alleviate convection conditions on Wednesday night.
721 AM EST Thu Mar 9 2017 Scattered showers will continue through the morning hours as a cold front swings through the North Country. Gusty winds will taper off, then pick up again on Thursday behind a secondary cold front. Towards the weekend there is the potential for snow squalls to develop on Friday as an arctic cold front brings much colder temperatures to the region. One to two inches of snow in the higher elevations is possible, but generally just a dusting to a couple tenths of an inch across the rest of the area. A weak low pressure system will pass well south of the region overnight.
Today Through Friday Night Clouds will increase and thicken today as a cold front approaches from the north. It will start turning cooler behind the front.
A cold front will be moving through with the storms. It will be cooler on Friday behind the boundary although with gusty northeast winds, increasing the fire danger yet again.
908 AM EST Thu Mar 9 2017 Low pressure will remain over Quebec through Friday as high pressure approaching from Western Canada pushes colder air across the region.
The upper trough will be too weak, too far north and moving too fast to push the airmass into the Gulf, resulting in the front washing out as it moves in.
531 AM CST Thu Mar 9 2017 Closed low over southern Hudson Bay with broad trough from Great Lakes to the northeast CONUS. Mostly zonal flow over the lower 48 with a few smaller waves moving across Pacific Northwest. Cooler, but dry conditions return to north central Nebraska on Friday. High temperatures Friday range from the low 50s across southwest Nebraska and the eastern Panhandle to the low 30s and upper 20s across north central Nebraska.
531 AM CST Thu Mar 9 2017 /12Z TAFS/ Thick high clouds continue to make it difficult to track the low clouds and MVFR ceilings underneath. This mixture will continue through the morning hours, with models suggesting that the MVFR cigs will eventually climb into the low end VFR range for most terminals by late morning or early afternoon. At the surface, an initial cold front will move south much of the area Friday.
S to SE winds at 5 to 14 KTs winds with the highest later this morning thru early evening.
Flat high pressure ridge over the west coast bringing dry conditions to the forecast area this morning with temperatures just a bit warmer than 24 hours ago. Ridge not of high enough amplitude to keep high cloud cover from spilling over the far north end of the state and can not rule out a slight threat of light precipitation over the northern mountains of Shasta county today.
High pressure centered over the Canadian Plains will extend southeast into the region Friday through the weekend bringing unseasonably cold temperatures. Expect highs to range from the lower 50s northwest to the upper 60s south. Skies will clear out late tonight as the low level trough swings through. High pressure and cool airmass in place Friday night will lead to lows in the teens across most of the region.
951 AM CST Thu Mar 9 2017 A spring like day will continue with sunny skies and highs in the low to mid 70s.
Not convinced this is possible, but left a few pixels of very light snow over the highest peaks of Colorado's northernmost range.
While rain is not particularly heavy anywhere, the the highest rain rates seem to be located across the coastal hills due to orographic enhancement, and in particular in Del Norte county which is closer to the frontal boundary. As the day progresses, the previously mentioned frontal boundary will slowly slide northwards as a low pressure system approaches the Oregon Coast. A weak cold front will then move onshore overnight, perhaps bringing another round of very light rain to Del Norte and Humboldt counties. Rain will diminish Friday morning, and a building upper-level ridge will maintain mostly dry and warm weather through the weekend and potentially until mid-week.
246 AM PST Thu Mar 9 2017 Fair and warm weather will continue this coming week as high pressure and weak offshore flow dominate the weather pattern. Onshore flow could bring back cooler weather and fog at the coast this weekend.
A weak cold front was analyzed across the Ohio River Valley northeastward into New England. This should have relatively little impact on temperatures and expect most areas to warm into the upper 70s with a few spots in North Florida getting into the lower 80s.
422 AM CST Thu Mar 9 2017 Early morning sfc analysis shows high pressure centered over nrn GA providing for a serly low-level flow over the forecast area, which in turn has pushed temps/dewpoints back into the steamy 60s. Meanwhile a stationary front was noted from low pressure over Quebec through the ern Great Lakes/Midwest to another low over the cntl Plains. Water vapor imagery shows flat ridging aloft over the Gulf with a near zonal flow to weak troffing covering most of the ern CONUS.