Aikyam-Lab/Synoptic-Bench huggingface dataset:
947 AM EDT THU MAY 12 2016 High pressure will give the region another mostly sunny day along with mild temperatures. A cold front will pass through the area on Friday bringing showers and the beginning of a much cooler period.
938 AM CDT THU MAY 12 2016 No change other than to blend to observed trends through 14 UTC with no change in forecast thinking in a high confidence scenario in the wake of departing low pressure in Ontario. Freezing temperatures expected across the north may result in a freeze warning needed.
1000 AM CDT THU MAY 12 2016 Water vapor loop indicated an upper level trough from southeast MAN to eastern ALTA. Cooler air was moving into the area. A much cooler pattern setting up. As for tonight temps, clouds should prevent a big fall but force of cold air alone should send temps down to near freezing in far nrn fcst area. Temps below freezing even with clouds and wind would pose more of a problem for sensitive plants/crops and if temps do look like they may fall to around 30 then headlines may be necessary for late tonight. Main colder air surge to arrive Friday as a vort max rotates back south around the departing upper low and moves into the RRV by 12z Friday.
/Today/ A mid/upper level low pressure trough will swing across the upper Midwest today, generating some clouds mainly across the northeast half or so of Iowa. At the surface brisk northwest breezes will pump cooler and drier air into the state, keeping temperatures low especially in northern areas with thicker cloud cover.
A cold front will sweep through the Mid Atlantic on Friday. Much cooler air will arrive for the upcoming weekend. Temperatures were bumped upward west of the Blue Ridge due to ample sunshine that has resulted where skies have cleared. Overall, the weather remains unsettled until the cold front can reach the Mid Atlantic by early Friday morning. A cold front will pass over the region Friday morning with light rain exiting the Piedmont by noon.
1023 AM EDT THU MAY 12 2016 A ridge of high pressure will remain over the north country through tonight. A cold front will move slowly east from the eastern Great Lakes on Friday and will bring rain showers to the north country Friday and Friday night.
Weaker high pressure allowed winds to decouple overnight with light or calm winds across the region.
740 AM EDT THU MAY 12 2016 A ridge of high pressure will remain over the north country through tonight. A cold front will move slowly east from the eastern Great Lakes on Friday and will bring rain showers to the north country Friday and Friday night.
A much cooler pattern setting up. As for tonight temps, clouds should prevent a big fall but force of cold air alone should send temps down to near freezing in far nrn fcst area. Temps below freezing even with clouds and wind would pose more of a problem for sensitive plants/crops and if temps do look like they may fall to around 30 then headlines may be necessary for late tonight. Main colder air surge to arrive Friday as a vort max rotates back south around the departing upper low and moves into the RRV by 12z Friday.
A high pressure system will build into the region for a significant warming trend through the end of the work week.
A nortwest wind aloft will push a cold front toward the Hill Country today with convection expected along the front.
621 AM CDT THU MAY 12 2016 Closed low over British Columbia and another over Manitoba with a trough extending into the Missouri river valley. There is a ridge from the east coast through the Hudson Bay. Upper low over south central Canada with trough into east Texas will continue to move slowly east with northern plains in northwest flow. Ridge pushing east into western Nebraska with clear skies and good insolation. Highs about 5F degrees warmer than yesterday.
A cold front moving through the zones crossed the Canadian border early this morning. Backdoor cold front moves into North Central Montana after 18Z, shifting winds to the north-northeast and bringing scattered to numerous showers and a few thunderstorms from 21Z to 03Z Friday.
15z surface analysis has a cold front stretching from the mid Mississippi River Valley SW towards central Texas. Water vapor imagery shows a trough axis rotating east which is also helping enhance convection over central Texas.
09Z Surface analysis this morning places a cold front from northern Illinois back through Saint Louis/Springfield Missouri, then into the Red River valley in Texas and west Texas. Regional WSR-88D radar trends overnight have shown last evening's convective activity beginning to enter portions of northwest Tennessee, and showers and thunderstorms located along the cold front in northwest Arkansas. As of 4 am CDT, temperatures across the Mid South are predominantly in the lower 70s at most locations. Additional showers and thunderstorms have been occurring across northwest Arkansas along the cold front. The aforementioned cold front will move east of the forecast area this evening with convective activity gradually diminishing as high pressure builds into the forecast area.
Upper level ridging will continue to weaken today as an upper trough moves across the upper midwest. This will send a weakening cold front southward toward the area late this afternoon into tonight. The combination of the weakening ridge and weak disturbance moving through the flow aloft will lead to a slightly better chance of rain today especially across interior zones. Isolated to low end scattered showers and thunderstorms are expected with the highest coverage across the northwest zones.
930 AM EDT THU MAY 12 2016 The ridge which has been present over the region during the week has lost any appearance aloft and an apchg disturbance from the Gulf of Mexico is sending quite a bit of higher clouds our way this AM. Given the low pop advertised late today over Lake county, wl keep this in place to account for psbl development late this afternoon with a late breeze collision.
The cold front has cleared the forecast area and have removed PoPs for the remainder of the day.
1033 AM EDT THU MAY 12 2016 High pressure will persist through tonight.
Early morning water vapor satellite imagery showing a mid-level trough extending from the Arrowhead of MN through western WI into western IL. Very likely this advisory will be cancelled before 7am as a secondary trough/westerly push of drier air filters in. This will be short-lived though with cumulus build-up expected through the remainder of the morning/afternoon as the mid-level trough/colder cyclonic flow rotates overhead. drawing in cooler air. plan on skies becoming mostly clear with lows dipping into the lower/middle 40s as a weak ridge of high pressure drifts across the region. will be watching a mid-level trough drop southeast through the Northern Plains. Look for the showers move out of the area by Friday evening as high pressure builds in from the Northern Plains. Cold is the main message through the weekend as mid-level troughing dominates the region.
Friday will be a another sunny day with even warmer temperatures across Western Washington. An upper level low will move over the Pacific Northwest over the weekend. High pressure building over B. I think the thermal trough may stays closer to I-5 or even the Cascades but we are still forecasting about a ten degree warming for the coast for Friday.
Ridge of high pressure will continue over the region providing temperatures 10 to 15 degrees above normal today and remain mild overnight.
A steady northwest wind will filter a drier air mass into the region throughout the day with afternoon high temperatures in the lower to middle 70s. By late afternoon, a cold front will push into the I-70 corridor and should result in the development of showers and thunderstorms across northeastern Kansas and northern Missouri.
an upper level disturbance and an approaching cold front expected this afternoon. Ahead of the cold front there looks to be better CAPE values and lapse rates but very little wind shear.
Temps will be around 10 degrees cooler on Friday across the Nebraska Panhandle.
Showers and thunder seem a foregone conclusion at this point with currently activity veering further south and east as an upper trough steers away as well. /issued 408 AM CDT THU MAY 12 2016/ A cold front has pushed south of the area and will result in cool moist low level northeasterly flow through the day. An upper level trough will be shifting off to the east this morning so chances will gradually dwindle. A second front is progged to push southward into the southern Texas Panhandle late Friday night ahead of an approaching upper level ridge.
Showers and thunderstorms have shifted well south of our FA this morning near the cold front across north central TX.
this morning as deep upper low continues to slowly slide through southern Manitoba. high pressure will continue building into the region today which should lead to clearing skies with afternoon highs warming into the lower 70s across much of the area. attention will shift to our northwest as a southeastward moving area of low pressure drags a cold front down across our region. Fcst models in decent agreement that convection will develop along the cold front during the afternoon hrs.
Ahead of this upper-level energy, thunderstorms developed across northern Oklahoma as a cold front continued to push south of the region. Based on current model guidance, the cold front associated with this Canadian airmass is progged to approach central Kansas by the late morning and early afternoon hours on Friday, before continuing to track southward across south central and southeast Kansas later Friday afternoon. With a weakly capped atmosphere in place, given the increasing convergence along the cold front across central Kansas coupled with isentropic lift and warm/moist air advection, expect storms to develop during the early to mid afternoon hours across central Kansas.
Cooler with clouds a chance of showers or thundestorms northern mountains over the weekend.
A cold front will sweep through the Mid Atlantic on Friday. Much cooler air will arrive for the upcoming weekend. A cold front will pass over the region Friday morning with light rain exiting the Piedmont by noon.
Now that we are on the backside of the surface front associated with the low pressure system in southern Canada, west winds will turn northwesterly today and cold air advection will ensue. For highs today, the latest guidance suggests slightly cooler temperatures than the going forecast.
01 A dry and stable air mass will spread over the region Friday night behind a departing cold front.
706 AM EDT THU MAY 12 2016 High pressure will crest across the area today before sliding offshore tonight and Friday. A cold front will approach the region on Friday, then slowly cross the region Friday night.
1028 AM EDT THU MAY 12 2016 Periodic shower and thunderstorm chances will persist until the passage of a Friday morning cold front.
Warming and drying through Friday as upper ridge builds over our area.
930 AM MST THU MAY 12 2016 High pressure will bring dry conditions and increasing temperatures into Friday.
948 AM EDT THU MAY 12 2016 High pressure will crest across the area today before sliding offshore tonight and Friday. A cold front will approach the region on Friday, then slowly cross the region Friday night.
An area of low pressure is forecast to move into northern California over the weekend bringing slight cooling and locally breezy conditions.
Chattanooga Airport, TN 86 61 79 54 / 60 70 10 0 Knoxville McGhee Tyson Airport, TN 83 61 76 53 / 50 70 10 10 Oak Ridge, TN 83 61 77 52 / 50 70 10 10 Tri Cities Airport, TN 82 60 75 49 / 50 70 20 10.
In the low levels of the atmosphere, an Atlantic ridge of high pressure across north Florida will retreat eastward this afternoon.
mid level high pressure to builds north into West Texas and the Desert Southwest as mid level trough over the High Plains moves east. A trailing cold front over Northwest Texas stalls across Central Texas later tonight before dissipating or retreating northward late friday. For Today as the upper ridge builds, subsidence increases which will allow for the mid level moisture to lower with mean rh levels continue to hover below 50 percent. Forecast continues to trend on the low end with the moisture the limiting factor.
2000 foot marine layer remains in place this morning with clearing by late morning as high pressure continues. Next trough arrives Friday with a cooling trend as onshore winds return.
602 AM PDT THU MAY 12 2016 An upper-level ridge will persist over northern California through this evening. On Friday the ridge will shift to our east a storm system approaches the region.
Chances for showers/storms will slowly increase today as a cold front moves into the region. Highs this afternoon will climb into the low to mid 80s. EXPECT INCREASING CHANCES FOR TSRA AHEAD OF A COLD FRONT MAINLY OVER THE GLH/GWO/GTR CORRIDOR THROUGH LATE AFTN EVENTUALLY SHIFTING SOUTH AS WE GO INTO THE EVENING. AN UPPER TROUGH WILL DRAG A COLD FRONT INTO THE DELTA THIS AFTERNOON AND THE BOUNDARY WILL MOVE ACROSS THE AREA DURING THE EVENING HOURS. THE COLD FRONT WILL EXTEND ACROSS THE SOUTHERN PORTIONS OF THE AREA BY MIDNIGHT, BUT THE GLOBAL MODELS SUGGEST THE SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO THE EARLY OVERNIGHT HOURS BEFORE DISSIPATING BY EARLY MORNING.
828 AM CDT THU MAY 12 2016 Closed low over British Columbia and another over Manitoba with a trough extending into the Missouri river valley. There is a ridge from the east coast through the Hudson Bay. Upper low over south central Canada with trough into east Texas will continue to move slowly east with northern plains in northwest flow. Ridge pushing east into western Nebraska with clear skies and good insolation. Highs about 5F degrees warmer than yesterday.
A cold front will slowly move through AR today and ahead of it showers and thunderstorms will be seen. Winds will be SE to SW at 5 to 15 mph ahead of the cold front, then switch to the W to NW at 5 to 15 mph. The cold front will drop SE through the CWA through this afternoon and early evening. but a new cold front will drop south into the state Fri night.
A slow moving cold front will push from north to south across West Central Texas today. Thunderstorms and Slow Moving Cold Front. A weak cold front will continue to move slowly south across West Central Texas today, and this boundary will serve as a focus for continued showers and thunderstorms. As the low-level jet, which is currently around 40 knots from the south, weakens over the next several hours, the severe thunderstorm and flash flood threats should also diminish.
803 AM EDT THU MAY 12 2016 Periodic shower and thunderstorm chances will persist until the passage of a Friday morning cold front.
649 AM CDT THU MAY 12 2016 A cold front is making slow progress across central Illinois early this morning, and is currently in the vicinity of the I-55 corridor. Otherwise, it will be cooler and less humid today behind the front, with most locations topping out in the lower 70s. Cooler lows tonight in the upper 40s and lower 50s which area pretty close to normal for mid May. Showers likely Friday evening with scattered thunderstorms, then diminishing from nw to se during overnight Friday night as a northern stream system tracks ESE into the southern Great Lakes Friday night and pulls a cold front se across central IL. Highs Fri in the upper 60s and lower 70s, just a bit cooler than today's expected highs.
400 am PDT Thu May 12, 2016 High pressure will keep skies generally clear and temperatures above normal through Friday.
PoPs were adjusted to match current radar trends, with the highest rain chances across our southeast counties, then decreasing as you head north into the Big Country. A slow moving cold front will push from north to south across West Central Texas today. /issued 402 AM CDT THU MAY 12 2016/ (Today and Tonight) A weak cold front will continue to move slowly south across West Central Texas today, and this boundary will serve as a focus for continued showers and thunderstorms. As the low-level jet, which is currently around 40 knots from the south, weakens over the next several hours, the severe thunderstorm and flash flood threats should also diminish.
914 AM EDT THU MAY 12 2016 A ridge of high pressure will remain across the area into Friday. A trough of low pressure will approach late Friday afternoon and cross the area Friday evening. Another quiet day on tap across the Pine Tree State as the region remains entrenched under high pressure.
Through Friday the upper low is only expected to shift to central Ontario, leaving the Northland under its influence, with cool and cloudy conditions continuing. In fact, as the upper low gets farther east some 850mb temperatures below zero spread into the forecast area from the north beginning around 06z tonight, getting as cold as -7 above KINL by Friday evening. This will leave us in the cyclonic flow on the southwest side of the upper low, and deep enough moisture for afternoon showers in the steep low level lapse rates. Have confined the highest pops to the Canadian border, with lower pops farther south where the moisture gets a little shallower.
The upper air analysis places a closed low lifting across southern Manitoba. Warmest readings will be in the south and southeast portions of the county warning area where more solar insolation should aid in deeper mixing with highs topping out in the lower 70s. This will set the stage for a cooler night, with lows mainly in the 40s. Behind this clipper, much cooler air will advect into the area.
732 AM EDT THU MAY 12 2016 A warm front south of the Erie lakeshore will push north later today. Meanwhile a cold front across the mid Mississippi valley will move east across the area tonight.
901 AM CDT THU MAY 12 2016 Latest surface analysis shows the cold front situated over east central arkansas and pushing off to the east. A cold front will slowly move through AR today and ahead of it showers and thunderstorms will be seen. Winds will be SE to SW at 5 to 15 mph ahead of the cold front, then switch to the W to NW at 5 to 15 mph. The cold front will drop SE through the CWA through this afternoon and early evening. but a new cold front will drop south into the state Fri night.
1041 AM MDT THU MAY 12 2016 Warming trend continues for the next few days as high pressure builds over the Central Rockies. Do see an increase in lapse rates over the higher peaks Friday afternoon, which should drive a few high based showers late in the day. Current freeze warning for Colorado zone 21 remains on track with a handful of sites down around freezing as of 4 am. Still a few hours of cooling to go and with little to no cloud cover and light winds, expect a few more sites to drop below freezing.
Broad high pressure over the southeast U. Doppler radar is indicating storms rumbling through FTW/DAL metroplex this morning ahead of a weak cold front.
The lift will also increase ahead of an approaching upper level short wave trough. A surface cold front will also move through Friday evening which will also help to lift the low levels of the atmosphere.
1025 AM EDT THU MAY 12 2016 Periodic shower and thunderstorm chances will persist until the passage of a Friday morning cold front.
522 PM CST Sat Feb 4 2017 Southwest flow ahead of a weak cold front will bring a warmer night to the area. Cloud cover during the evening will also help to keep temperatures warmer than last night. Should see clouds slowly clear from the west late this evening and overnight, but the southerly flow should keep the low temperatures to near or just a couple of degrees below freezing. The cold front barely makes it through the area Sunday. This combined with the warmer start to the day will likely lead to warmer temperatures than today, even though the "cold front" will be south of the majority of the area across the Ozarks.
Warmer temperatures expected as a warm front moves north through the area.
The highest rain chances will be across northern portions of the area with little if any rain along the coast. Lows tonight will range from the lower 40s inland to mid and upper 40s along the coast with increasing clouds. Highs on Sunday will range from the low and mid 60s inland to mid and upper 60s across the southwest zones.
Northward of the front high pressure dominates across much of the eastern CONUS and extends into central Florida. Tonight into Sunday the high pressure across the eastern CONUS will shift to the southeast into the Atlantic waters off of the Carolinas as a developing low and frontal system moves eastward into the Great Lakes region.
543 PM EST Sat Feb 4 2017 High pressure will shift offshore well south of New England tonight as a warm front passes by to the northwest of the region. Low pressure will move east through southern Canada Sunday and will drive a cold front through the region Sunday night as it continues east into the maritimes.
821 PM CST Sat Feb 4 2017 The warm front was right along the Gulf side coast of the Matagorda Peninsula. The latest models continue to push the warm front northward through SE Texas tonight. /00Z TAFS/ Surface analysis has warm front just south of a Galveston to Wharton at 23Z. KGLS will likely drop to IFR by 01Z and should see a slow progression of IFR ceilings northward as warm front moves north. There may be a few passing showers mainly north of Houston along where the warm front stalls by late morning.
The Arctic air-mass is confined within a broad upper low across most of Canada. The Pacific storm begins to be absorbed by the broad Canada low, allowing a slight upper ridge to develop over eastern Montana. this will temporarily nudge in a warm front that may produce liquid precipitation on Sunday, mainly in southern zones.
So went ahead and added WY115 to the high wind warning.
820 PM EST Sat Feb 4 2017 High pressure will shift offshore well south of New England tonight as a warm front passes by to the northwest of the region. Low pressure will move east through southern Canada Sunday and will drive a cold front through the region Sunday night as it continues east into the maritimes.
1054 PM EST Sat Feb 4 2017 A cold high pressure center will move off the Virginia and North Carolina coast tonight.
Coastal troughing at low levels is doing its part in keeping a cool NE flow over the I-35 corridor and enhancing the light overrunning pattern. There remains some light surface ridging by most models along the escarpment to suggest more patchy light rain and drizzle, but expect to see fewer areas receiving measurable rainfall amounts.
After a cold start under high pressure, temperatures had warmed well into the 40s with a south breeze. For tonight and Sunday, the high pressure center will continue to move east, allowing gradually warmer and more moist air to move into the area. Lows will be in the 30s, with the lows occurring around midnight, then temps steady or slowly rising late.
sleet or freezing rain mixed in some locations continue across northeast Oregon and southeast Washington this evening but overall coverage and intensity are decreasing as current weather system moves out of the forecast area. This next system will be warmer than the current and past few systems resulting in mostly rain.
For tonight, the low/cold front will continue to track east across the area with a secondary mid-level trough pushing across northern MN/WI. This trough was producing scattered snow showers out across ND this afternoon. Could also see a slight chance for patchy freezing drizzle as cloud ice becomes questionable. Quiet/dry Sunday into Sunday night as high pressure slides east across the region.
surface winds will be light in speed and variable in direction as a weak low pressure center migrates southeastward across the area tonight. Elongation of low into a northwest to southeast trof during the day on Sunday will cause further variability in direction, but speeds expected to remain light, below 15 kt for duration of forecast. /Issued 435 PM CST Sat Feb 4 2017/ Lee side troughing today has caused temps to rise this afternoon into the 60s and 70s for the Panhandles.
Weak surface front washing out over S FL while high pressure down the Eastern Seaboard tonight slides into the Western Atlantic Sunday with N-NE low level flow over FL.