Aikyam-Lab/Synoptic-Bench huggingface dataset:
1008 AM PST Wed Feb 22 2017 The widespread wet weather of the past couple days will begin to subside as a cooler and unstable air mass takes up residence across the region today. Temperatures will remain cooler than normal for this time of year with highs generally in the mid 30s to mid 40s and nighttime lows in the teens to middle 20s. Cooler temps will keep rivers below any critical levels.
Cooler air will continue to move in aloft leaving a very unstable atmosphere through today. Forecast models have slowed the arrival of the much colder air mass, permitting high temperatures to reach above freezing for most valleys again today.
341 PM CST Wed Feb 22 2017 Latest UA analysis and recent WV images shows upper low east of the area, moving toward FL. Overall, a rather pleasant aftn underway with temperatures in the lower 70s acrs LA and upper 70s/near 80 acrs southeast TX. Benign weather expected the next few days as weak ridging aloft transits the area. Highs Thursday are expected to reach the upper 70s/near 80 with the passage of the weak mid/upper ridge.
1236 PM EST Wed Feb 22 2017 Low pressure over Lake Superior will move across the Great Lakes. The trailing cold front will sag over the forecast area Thursday then lift back north as a warm front Thursday night.
303 PM MDT TUE AUG 2 2016 18Z water vapor imagery indicated short wave trough moving over the periphery of large H5 ridge centered over the four corners area. cold front had passed through majority of the cwa.
Tomorrow will see another inverted trough move through the area with similar (but slightly lower) pwats in place and slightly more flow in the 700-500mb layer.
241 PM EDT TUE AUG 2 2016 Atlantic high pressure ridging into the southeastern states will sink southward overnight as a cold front moves into the area from the north.
Global models seem a little overdone with pcpn potential to our west tomorrow morning when compared with the high resolution model guidance so think there will be less cloud cover in the early am. Tomorrow, a cold front will reach the central Dakotas at prime heating. Only draw back is that convective temperatures are in the lower 90s but forcing may be able to overcome this.
107 PM CDT TUE AUG 2 2016 A surface cold front is situated across northwestern MN early this morning. Temperatures today will be fairly close to climatological normals, with highs in the low to mid 80s.
307 PM EDT TUE AUG 2 2016 High pressure will build over the region tonight and will settle south off the coast on Wednesday.
442 PM MDT TUE AUG 2 2016 Convection has developed over the higher terrain this afternoon with very little drift towards the north. Expect most activity to remain anchored to the higher terrain due to lighter steering flow with most activity ending after sunset.
223 PM EDT TUE AUG 2 2016 Atlantic high pressure ridging into the southeastern states will sink southward overnight as a cold front moves into the area from the north.
340 PM CDT TUE AUG 2 2016 A nearly persistent weather pattern will prevail through the weekend, courtesy of a dominate 594dm 500mb height ridge centered over the southern plains and western portions of the lower MS River valley. Initially, weak northwest flow around the eastern periphery of the upper ridge will bring chances of rain to the TN River valley. GFS and ECMWF bring a slight bump in Midsouth rain chances for the weekend, despite the upper ridge center edging east toward the lower MS River valley.
330 PM CDT TUE AUG 2 2016 A subtle trough boundary will finish moving east through the Northland. High pressure will move into the Northland tonight, providing clear skies and negligible wind speeds overnight. Leaned on the cooler guidance, such as the consensus of the MOS, considering the good radiational cooling expected. The high pressure will shift east through the Great Lakes region Wednesday, and warm southerly flow will develop across the Northland.
Ridging dominating at the moment, keeping an overall clear sky and allowing temperatures to continue to heat up. A southwest flow will develop across the region tonight as an upper low approaches from the Pacific Northwest. Upper low moves across southern Canada during the day tomorrow with an associated cold front sweeping through MT and WY. This cold front moves through the region late tonight into Wednesday morning.
High pressure will build across the region tonight. High pressure over New England early Wednesday will drift to the southeast and is expected to be over the Gulf of Maine by the evening. Some isolated thunderstorms are possible behind the high Wednesday afternoon in the north.
Currently, temps were in the mid to upper 70s southwest to upper lower 80s elsewhere.
Overall the pattern will undergo a modest change the remainder of the week as a longwave trough and associated upper levels low dive down the West Coast.
256 PM MDT TUE AUG 2 2016 Subtropical moisture continues to ride into the state over an upper ridge stretched across New Mexico, Texas and Oklahoma. Overnight lows will remain slightly warmer than normal for this time of year.
A relatively moist airmass will remain over the forecast area for the rest of today before drier conditions return to northern Utah Wednesday behind a cold front.
1144 AM MDT TUE AUG 2 2016 Area of low clouds and fog continue to trail behind cold front and morning satellite imagery helps narrow down the actual areal extent. Cold front will settle along the southern fringes of the forecast area today. The front will be the most likely place for widely scattered thunderstorms to develop this afternoon and then spread northward tonight as the front also returns north as a warm front. Upper ridging continues to be the dominant feature on Wednesday. There will be low chances of thunderstorms in western areas near the surface lee trough with daytime heating.
150 PM EDT TUE AUG 2 2016 An upper level area of low pressure will trigger a few showers and perhaps an isolated thunderstom today, mainly east of Interstate 81. Skies will clear tonight under high pressure and allow patchy valley fog to form toward morning. High pressure remains in control Wednesday bringing a warm and sunny day.
Once these storms are out of the picture there is still a chance for more showers and storms late in the afternoon and tonight as a weak cold front, near the Wisconsin/Minnesota border at 19Z, moves into the state.
Could be overnight development in this region as the low level flow picks up from the west again, much like last night.
Have added some slight chance pops across the northwest corner of Sheridan county after 20Z as a cold front drops south towards the panhandle of Nebraska. Wednesday night, a cold front will move through most of the forecast area. This will bring at least a slight chance for all except the far southeastern areas, which will remain just ahead of the cold front. There will be a fairly deep closed low moving into southern Manitoba overnight with the upper trough moving across the Dakotas and Nebraska.
Convection this afternoon continues to fester and redevelop within a fetch of monsoonal moisture which rotated into a portion of the upper ridge axis across Kansas.
Mid level ridging will remain centered over Texas and the western Gulf of Mexico through the forecast period, with high pressure stretched across the north Gulf of Mexico. /issued 435 AM CDT TUE AUG 2 2016/ SHORT TERM (Now through Wednesday): 500 mb ridging will remain over Texas and the western Gulf of Mexico through the forecast period.
High pressure aloft remains over the region this afternoon, and even though the sea breeze boundary is slowly pushing inland from the coast, convection is having a rough go with the ridge in place.
Some convection developing in moist axis ahead of an upper level trough and will build across the Great Valley through the afternoon hours before exiting through the Appalachians.
Upper level high pressure will continue to dominate central California through Wednesday. The high res models such as the HRRR, ARW, and NMM are in good agreement that we may see a stray shower or thunderstorm over the same area the cumulus is building through the early evening hours.
The center of the upper level high is just about overhead today and it should slide off to the east of the panhandles by Wednesday night. The panhandles will be in between an upper level trough over the southwest U. and the high over the south central U.
A strong cold front will move across north central Idaho and western Montana late this afternoon and evening. Cool air at the center of a low pressure system will shift east across the region tonight with some snow on the highest peaks in Glacier Park by morning, roughly above 8000 feet. Other locations in north central Idaho and western Montana will be dry, but cooler.
The period starts with the upper ridge in place over the Central Plains Wednesday night. Temperatures Wednesday night will remain in the 70s with the lower boundary layer remaining mixed through the night.
The broad upper ridge over the southern half of the conus refuses to budge through the course of the week. With thermal ridge just off to the west. Precip chances increase towards the end of the week and into the weekend across the higher terrain and along the front, but overall coverage remains a bit uncertain.
Deep moisture and an inverted mid level trough from 700- 500 mbs across central FL will spell another round of scattered to numerous showers/storms across the area for mid week.
Will need to watch in case this takes a bit of an eastward shift, as hinted at by some of the higher resolution models.
Otherwise mainly dry conditions are expected with a brief area of high pressure in place. /Wednesday through Tuesday/ High pressure in place into Wednesday with broad upper ridging building in aloft. Thermal ridge to begin to build into the central states as well, with the heat nudging eastward into Iowa aloft.
So far this afternoon, temps were trending slightly cooler across most valleys so far this afternoon, with a few degrees of warming across the Antelope Valley and lower mountain elevations.
However, showers and thunderstorms will be on an increase over the east coast and the Atlantic waters through tonight, as a trough of low pressure over the Bahama Islands moves to the west northwest towards South Florida. The trough of low pressure will continue to move west northwest through South Florida on Wednesday keeping the deep tropical moisture in place. The wind flow will also be southeast late this week over South Florida, due to high pressure over the Western Atlantic Waters. This will focus the highest chance over the interior and west coast metro areas each afternoon. The high over the western Atlantic waters will shift southward into South Florida, as a cold front will move southward from the Tennessee Valley into the Southeastern United States.
1219 PM CDT TUE AUG 2 2016 Ridge of high pressure will remain aloft with VFR conditions prevailing through the 02/18Z taf period. Large upper level ridge of high pressure remained over the area and will provide for plenty of sun resulting in hot and humid conditions for the Four State Region.
Tonight Through Wednesday A weak upper level low pressure trough over western Wyoming will bring some showers and thunderstorms over the west spreading east through the night. A cold front will begin to move into the north in the afternoon and evening hours. wednesday night Through Tuesday A cold front will sweep south with a sharp turn of the winds to the northeast. Some freezing lows are expected in the western mountain valleys.
232 PM EDT TUE AUG 2 2016 An upper level area of low pressure will trigger a few showers and perhaps an isolated thunderstorm this afternoon, mainly east of Interstate 81. Skies will clear tonight under high pressure and allow patchy valley fog to form toward morning. High pressure remains in control Wednesday bringing a warm and sunny day.
Thunderstorms should develop along the front in the low level moisture convergence as the low level jet intersects the warm front. Thunderstorms should continue into tomorrow morning before starting to diminish as the low level jet begins to weaken. With all of the rain as of late, still expect dewpoints to recover back into the lower to mid 70s during the afternoon. Britt There may still be convection across parts of southeast MO and southwest IL Wednesday night as an upper level trough, vorticity maximum moves slowly eastward through this area.
240 PM CDT TUE AUG 2 2016 A dampened ridge exists over portions of the southern plains/Southeast as evidenced by water vapor sat imagery showing a ring of convection around the center over E TX. Poleward of this ridge, a couple of troughs are on opposite coasts of North America. However, a weak upper low evident on water vapor and guidance is expected to develop late tonight over AR and could shift east early Wednesday morning. Depending on the coverage of these storms, the daytime highs in the low 90s may be in jeopardy.
An upper level low moving across the Cascades this afternoon will move well east of the area by Wednesday morning. Showers will diminish as the low moves away from the area.
1240 PM MDT TUE AUG 2 2016 Area of low clouds and fog continue to trail behind cold front and morning satellite imagery helps narrow down the actual areal extent. Cold front will settle along the southern fringes of the forecast area today. The front will be the most likely place for widely scattered thunderstorms to develop this afternoon and then spread northward tonight as the front also returns north as a warm front. Upper ridging continues to be the dominant feature on Wednesday. There will be low chances of thunderstorms in western areas near the surface lee trough with daytime heating.
92 Generally scattered showers and thunderstorms are expected through the week with highs in the lower to middle 90s.
Steering flow under large upper high over Colorado is very light and meandering right now. For the time being, upper high center has meandered over central Colorado, resulting in easterly steering winds aloft over most of southern Colorado at the present time.
As for a storm threat, we will still be well ahead of the approaching cold front, and a quick look at models soundings shows that very strong capping will preclude the slightest though of daytime storms.
307 PM MDT TUE AUG 2 2016 Convection has developed over the higher terrain this afternoon with very little drift towards the north. Expect most activity to remain anchored to the higher terrain due to lighter steering flow with most activity ending after sunset.
With weak high pressure still in place and the pattern that we are in still not much change in the forecast for the next few days. it hangs up well north of the forecast area but it will help suppress the high over Bermuda some.
Therefore lowered highs into the lower to mid 80s.
Surface wise, a steady state western atlantic ridge lies across the northern portion of the Sunshine State.
/ISSUED / High pressure continued over Southeast Texas late this morning. /ISSUED 312 AM CDT TUE AUG 2 2016/ Clear skies dominate while we sit directly underneath the axis of a midlevel ridge. At the surface, we sit on the periphery of high pressure, continuing our general trend of light south to southeasterly flow. The story of the short term forecast will be dominated by the ridge, which should drift slowly westward. It would not be impossible to squeeze out a storm or two along the seabreeze today or tomorrow, but it's tough to justify much in the way of PoPs underneath a ridge of this strength.
Mid-level anticyclone has become centered over South Central Tx and looks to further dry out low levels and raise max temps. Expansion of the mid-level ridge into the Northern Plains should result in lighter sfc winds over TX, which should allow for better cooling overnight while continuing trends for fewer low clouds at daybreak.
618 PM EDT TUE AUG 2 2016 Atlantic high pressure ridging into the southeastern states will sink southward overnight as a cold front moves into the area from the north.
BASED ON PERSISTENCE, PREVIOUS RAIN, DEW POINT DEPRESSIONS, LIGHT WINDS AND MOISTURE TRAPPED IN THE LOW LEVELS, THERE MAY BE STRATUS/FOG DEVELOPMENT. LOWS OVERNIGHT IN THE LOW/MID 70S WITH UPPER 60S ACROSS THE HIGHER TERRAIN. WHILE HIGH PRESSURE EXTENDS ACROSS THE NORTH, A WEAK AREA OF LOW PRESSURE WILL DEVELOP ALONG THE BOUNDARY THAT BECAME STALLED ACROSS THE SOUTH. LOWS IN THE LOW/MID 70S WITH UPPER 60S ALONG THE HIGHER TERRAIN.
An upper ridge will push downstream while a trough digs into the northwest part of the state. A cold front will push through on Wednesday with a wind shift to the west and northwest.
534 PM EDT TUE AUG 2 2016 High pressure will build over the region tonight and will settle south off the coast on Wednesday.
218 PM CDT TUE AUG 2 2016 WV imagery this aftn shows the upper ridge centered over our region, and our 2 pm temps confirm its influence. However, as we move into the weekend, the ridge will shift just far enough w to allow for some weakness on the ern periphery. /issued 1219 PM CDT TUE AUG 2 2016/ Ridge of high pressure will remain aloft with VFR conditions prevailing through the 02/18Z taf period.
SHORT TERM (Tonight through Wednesday Night): Mid level ridging will remain centered over Texas and the western Gulf of Mexico through the forecast period, with high pressure stretched across the north Gulf of Mexico.
619 PM EDT TUE AUG 2 2016 High pressure will continue to slowly build south over our region, and then shift off shore late in the week.
18Z water vapor imagery indicated short wave trough moving over the periphery of large H5 ridge centered over the four corners area. cold front had passed through majority of the cwa.
/18Z TAFS/ High pressure will continue to strengthen over Central Tx over the next 24 hours. Surface wind speed trends are down from the past few days since the upper ridge has expanded northward into the Central Plains states. Otherwise, today will be hot and dry as the sub-tropical upper level ridge continues to build over the area. Highs today will top out in the middle 90s to 104 degrees with the higher temperatures across the Rio Grande Plains. The highest heat indices today will be across the southeastern CWA where the higher dewpoints are expected. Much of the same can be expected tomorrow with temperatures a degree or two warmer as the ridge continues to support subsidence across the region.
This convection has developed within the surface thermal ridge axis where strong diabatic heating and a deeply- mixed boundary layer has allowed parcels to reach their LFCs amid slowly-increasing low-level moisture. Current surface analysis places ridge over the eastern Dakotas. Upper level analysis places flattened ridge over the Northern Plains, with a variety of weak waves moving through. additional waves push into the area this evening as aforementioned upper low quickly pushes eastward over the Rockies. Through the day aforementioned upper low gradually works eastward along the international border with a variety of waves lifting ahead of it.
354 PM CDT TUE AUG 2 2016 Current surface analysis places ridge over the eastern Dakotas. Upper level analysis places flattened ridge over the Northern Plains, with a variety of weak waves moving through. additional waves push into the area this evening as aforementioned upper low quickly pushes eastward over the Rockies. Through the day aforementioned upper low gradually works eastward along the international border with a variety of waves lifting ahead of it.
allowing temps to get up into the lower 90s early this afternoon. with forecast area in weakness between two upper high centers. The subtropical ridge axis over the adjacent Atlantic is expected to edge into Central Florida Wednesday night while center of high pressure aloft will be situated over Texas and the Southern Plains during the entire period.
318 PM EDT TUE AUG 2 2016 High pressure will continue to slowly build south over our region, and then shift off shore late in the week.
While PoPs were removed over the west where skies are now mostly sunny, can't rule out convection forming along the cold front as it move east.
Dry cold front passed through Pendleton and Redmond in Oregon around 19Z. Cooler air lies behind the front and Wednesday morning lows will be in the mid 30s to mid 40s in Oregon, and 40s to mid 50s in Idaho.
The rain chances come from disturbances moving through the flow on the west side of the upper ridge leading to shower/storm develop near the area or west of the area and then moving into the fa.
An upper high situated over the Southern Plains remains stationary through Wednesday. For temps, with abundant cloud debris hanging on overnight along with help from the upper high over the Southern Plains, have kept temps a bit above seasonal, even with the general flow becoming offshore. Even with the above seasonal chance of rain, subsidence from the plains upper ridge works with heating during the morning for most of the fa to see high temps above seasonal. highs generally in the low to mid 90s expected.
301 PM MST Wed Dec 7 2016 Current surface analysis shows strong low pressure now over southern Ontario, with 1045 mb high over southern Alberta. Large upper level trof now covers much of Canada and the United States, with strong jet stretching from the Pacific NW to the Southern Plains to the northeast US. However, there will be less wind across the area as the high moves into eastern MT. Lows Thursday night will drop to near or below zero again as the high moves across ND.
/issued 322 PM CST Wed Dec 7 2016/ As discussed in the late morning update, the high resolution models have been advertising a consistent signal of an area of light precipitation moving southeast across northern and eastern portions of the forecast area. Will keep some low pops in the east for the chance of drizzle, and with the wet bulb temperatures near or below zero in northern areas, the chance of freezing drizzle.
Correspondingly, low temperatures look to fall a couple degrees cooler than this morning (which has already been captured in the previous forecast).
1007 PM EST Wed Dec 7 2016 Low pressure north of the Great Lakes region will move northeast through overnight.
Temperatures then become tricky Thursday night as the cold surface airmass will retreat eastward thus lows across most of southeast Wy should occur Thursday evening with temperatures then rising overnight as warmer downslope flow occurs.
Chattanooga Airport, TN 36 48 24 39 / 10 10 10 10 Knoxville McGhee Tyson Airport, TN 33 43 21 34 / 20 10 10 10 Oak Ridge, TN 31 44 21 35 / 10 10 0 0 Tri Cities Airport, TN 32 42 18 33 / 20 10 10 10.
Upper trough gradually moving east into the eastern part of the country but strong Pacific flow will keep the jet stream south of the CWA over the West.
911 PM EST Wed Dec 7 2016 A trough of low pressure will result in a return to cold temperatures and periodic snow showers through the end of the week.
With significantly cooler air moving over the area on Thursday, look for highs ranging from low 50s northwest to low 60s southeast and long the coast.
518 PM CST Wed Dec 7 2016 An arctic cold front will continue to move through the state this Wed evening.
A few flurries or light freezing drizzle could occur late tonight into Thursday morning, though no impacts are anticipated ATTM. High pressure will continue to build in through the evening with surface winds increasing to near 20 knots from the NE with higher gusts. expect a few snow flurries with also the chance of some very light freezing drizzle. Highs tomorrow struggling to reach the freezing mark on the Caprock. and a few degrees warmer in the SE Panhandle and Rolling Plains in the mid 30s. James Tomorrow's stubborn low clouds should undergo steady erosion and thinning by Thursday night as cold surface ridging departs the region.
Clouds will continue to be a major facet to the forecast for another day, but a rather big time (temperature-wise) secondary cold front coming through tonight through tomorrow will finally work to start gradually sweeping clouds south of the region by tomorrow afternoon into tomorrow evening.