Aikyam-Lab/Synoptic-Bench huggingface dataset:
Main cold frontal band of showers has moved northeast out of the forecast area this evening. A second short wave rotating around the offshore upper low is currently moving through western Oregon. The weakening upper low then moves through the area Wednesday with a continued chance of showers. Weak upper level ridge over the region Thursday with partly to mostly sunny conditions.
345 AM MDT Wed Mar 22 2017 Upper ridge axis shifts slightly eastward today but still remains over the area resulting in above normal temperatures. So kept cooler temperatures in eastern areas while northeast Colorado will warm well into the 60s.
308 AM EDT Wed Mar 22 2017 A large arctic high pressure centered just north of Lake Superior will drift across the state today and off to the east on Thursday.
Cooler conditions will occur today as highs warm into the 50s. An upper level ridge will spread across the Plains today and tonight. As the ridge starts to spread east into the area, warm air advection and isentropic lift will develop across the region allowing some light rain or drizzle to develop this evening through tonight. Warmer condition will occur on Thursday as highs generally warm into the lower to upper 70s with the upper level ridge over the region.
405 AM CDT Wed Mar 22 2017 The cold front that brought yesterday's storms has moved south of our area and left us with gusty winds out of the north. Dewpoints near the TN/AL state line are around 50 degrees, while dewpoints near the TN/KY line are in the low 30s. They'll continue to drop today into the low 20s over the northeast portion of our CWA. Upper ridging should keep the Tennessee Valley dry and beautiful for the remainder of the work week.
225 AM EDT Wed Mar 22 2017 An arctic cold front moving across Vermont and New York during the pre- dawn hours will usher in much colder air today with strong and gusty northwesterly winds. High pressure in place for Thursday will result in lighter winds and moderating temperatures.
106 AM EDT WED Mar 22 2017 An arctic cold front will drop south across the area this evening and overnight. High pressure will move southeast from the Canadian Plains across the area Wednesday night.
/issued 918 PM CDT Tue Mar 21 2017/ Temperatures are falling a bit more slowly than previously though behind the slowly-moving cold front.
The 8 pm regional surface analysis showed a surface cold front, which has probably merged with a large outflow boundary from a MCS over northern GA and eastern TN, extending from near Atlanta through eastern OK. The Tri-State region will reside on the southwest edge of eastern CONUS troughing through the short term. In the wake of the front, the combination of a stable wedge and low- level easterly moisture transport will result in cloudy and cooler conditions on Thursday afternoon.
Even though a ridge of high pressure will quickly build over the region on Thursday, temperatures appear to be a few degrees cooler compared to today's readings. This is due to slightly cooler air being pushed into the region behind today's disturbance.
404 AM CDT Wed Mar 22 2017 A longwave upper level ridge axis centered over the western High Plains will translate eastward into the Central Plains by Thursday morning. Given this trend plus the fact that guidance over the last 24 hours has overestimated the lower tropospheric moisture profiles, removed POPs in the south for today.
Backdoor cold front helping to keep stratus locked in for much of the day in our north/northeast and kept us cooler up there. The HRRR seems to be doing a decent job with the cooler temperatures up there for this afternoon and early evening. For Wednesday, Upper level ridging will help ensure a dry day, with seasonable highs in the lower 50s. At the surface a lee low develops over Colorado as an inverted trough/warm front extends northeast for Thursday. Thursday could be a stratus filled day if the NAM is right, and we might wind up way cooler than the forecast 60s/70s.
Upper air analysis last evening showed a large amplitude ridge over the western half of the country with northwesterly flow across Texas. At the surface, high pressure was centered over the Gulf and winds across our CWA were from the southeast. The high in the Gulf will keep the front from moving into our area. The upper pattern during this period will become more progressive with the ridge moving toward the east and a trough moving through the west and ending the period over the Four Corners region. The low level winds will remain from the south to southeast and we don't expect much change in the weather.
1114 PM MDT Tue Mar 21 2017 Widespread dense freezing fog and freezing drizzle is ending across the area and visibilities continue to increase. Therefore have cancelled the Freezing Fog Advisory that was in effect. At least through this evening, expect upslope fog mixed with drizzle or freezing drizzle (depending on ground temperatures) to continue, especially on the SD plains and eastern slopes of the Black Hills. This will cause gusty winds over northeast WY and the higher Black Hills as well as the frontal boundary to move northeast as a warm front. Wednesday, upper ridge builds into the CWA with much warmer temperatures and precipitation ending early. Wednesday night, upper low pulls into the southwest US with impulse laden southwest flow across the CWA which will support a chance of mainly rain, possibly mixed with snow over the higher elevations.
Cold front has already pushed southward along the lakeshore early this afternoon, with winds shifting to the northeast and becoming gusty. Quiet weather with cold temperatures are expected Wednesday, with high pressure passing by to the north. Wood 205 PM CDT A big upper level ridge will slide across the western Great Lakes and the Mississippi River Valley through Thursday, with some short wave energy already riding over the top of the ridge by Thursday afternoon. The low level high pressure ridge will be over the central and eastern Great Lakes by 12z Thursday, allowing return flow and a decent shot of warm air advection with a warm front to surge north into the area.
216 AM EDT Wed Mar 22 2017 A cold front will push slowly southward through the area tonight.
347 AM EDT Wed Mar 22 2017 Cold front crosses this morning, with high pressure building in for today and Thursday.
311 AM EDT Wed Mar 22 2017 High pressure over the western Great Lakes will move southeast across the region tonight.
Still looks like a mix of either rain or freezing rain depending on surface or ground temperatures. A warm front will enter western North Dakota Wednesday afternoon with highs in the 50s expected along and west of US Highway 85 with 30s ahead of the front across the James River Valley through the Turtle Mountains.
138 AM EDT Wed Mar 22 2017 Cold front will sweep through tonight, bringing much colder temperatures today.
Just added in some fog for the southern Laramie Range, eastern foothills, and Cheyenne proper tonight within moist south- southeast flow up the Cheyenne Ridge and Laramie Range.
After that, upper ridge builds to our west, with H5 height rises upwards to 40DM occurring over the heart of the FA, even as broad surface anticyclone anchors across Great Lakes, and extends its influence southward into the lower Ohio valley with cooler/drier Canadian CP airmass. On Thursday, the mean upper ridge migrates eastward and anchors across the Mississippi river valley, while strong height falls are noted in the Desert Southwest, in response to a strong upper jet/digging Long wave.
700 AM EDT Wed Mar 22 2017 High pressure over the western Great Lakes will move southeast across the region tonight.
In the wake of the cold front clouds will scatter out by late morning leaving mostly sunny skies. Daytime high temperatures will be noticeably cooler than yesterday and a couple of degrees cooler than seasonal norms. Overnight, high clouds are expected to increase which may pose a challenge when it comes to freezing temperatures over NE TN and SW VA. Current forecast has freezing temps mentioned in these areas however if cloud cover is more dense, then those freezing temperatures may never be realized. In the meantime, will mention the possibility of freezing temperatures in the hazardous weather outlook this morning.
Showers and thunderstorms have cleared the area with temps quickly falling into the upper 50s to lower 60s in response to the passing cold front. This seems to be a reinforcing cold front as dew points are dropping 10-15 degrees behind it as well as a wind shift from the NW to the NE. Despite the mid level ridge shifting east on Wednesday into Thursday, cloud cover will be considerable with weak impulses in the northwest flow at mid levels tracking southeast. This as mid level warm advection on the west side of the 850 mb ridge will produce showers across the upper and middle MS valley to our northwest. Forecast soundings indicate that warm advection above 900 mb may increase the inversion and trap the low level moisture and clouds through Thursday Night.
Low pressure will be moving through the Great Basin over the next couple days. This system will produce mainly valley rainfall however up to a foot and a half of snow could fall on the Ruby Mountains and the higher terrain of central Nevada.
128 AM EDT Wed Mar 22 2017 A cold front crosses tonight. High pressure Wednesday and Thursday.
Upper trough off the NW coast is shifting east but will split as it comes inland, with the main parts going north and south of us this afternoon and tonight. After a relatively cool night under the split upper trough, Thursday will be dry and a little cooler than today as the next short wave ridge builds in from the west.
Still anticipating primarily VFR for the next 24 hours, with upstream mid-level ridging and Gulf high pressure still dominant. Mid level ridging will lie upstream, with high pressure over the Gulf, supporting a typical moderate south southeast wind across the area.
626 AM EDT Wed Mar 22 2017 High pressure over the western Great Lakes will move southeast across the region tonight.
358 AM CDT Wed Mar 22 2017 It will be cooler today following yesterday's cold front, while low clouds remain fairly uncertain this morning. High temperatures may not be significantly impacted, but we have edged slightly towards the warmer guidance expecting sunshine most areas, especially by later today. Tonight, an upper level ridge axis will edge just east of the area, with backing flow aloft.
204 AM EDT Wed Mar 22 2017 Showers and thunderstorms will continue through the early morning hours as a cold front moves through the area.
A bit of cool wedge is expected tonight as the sprawling area of high pressure moves into the Mid Atlantic region, providing easterly surface winds which should limit radiational cooling. This will result in easterly flow moving across a cooler air mass, moderating temperatures back to near-seasonable for Thursday.
357 AM CDT Wed Mar 22 2017 Challenge for today will be temps and slight chance for some warm air advection precip as return flow from departing high pressure commences across the forecast area.
The forecast is for another great spring day across South Florida with mostly sunny to partly cloudy skies and high temperatures in the low to mid 80s.
A warm day is anticipated across the Tri-State region ahead of a weak cold front which will sag southward into SE AL/SW GA later today.
A strong and significantly colder Pacific storm system will move east across the Great Basin through Thursday, followed by a return of high pressure for the end of the work week.
130 AM EDT Wed Mar 22 2017 A cold front will push slowly southward through the area tonight.
301 AM EDT Wed Mar 22 2017 A cold front will push slowly southward through the area today. Cold high pressure will build into the region from the north this afternoon through Thursday. Warmer conditions will arrive this weekend as the high shifts well off in the Atlantic. The main cold front will surge into central NC late morning. Yet, the actual lows should dip to freezing for several hours regardless. Lows Thursday night will again flirt with freezing in the south and likely fall into the upper 20s and lower 30s again across the north. coast, with mid level ridging moving across the area from west to east.
The dry cold front was south of I-20 at 0530Z and wl cont south this morning.
400 AM CDT Wed Mar 22 2017 Forecast highlights in the short term period will be breezy and warmer conditions today, followed by a chance for light freezing rain late tonight south central. Currently, upper level ridge axis over the high plains building eastward. Strong southerly return flow across the Dakotas with high pressure over the Western Great Lakes region and a trough of low pressure developing in the lee of the Rockies. WAA today as a warm front moves east across the region with the upper level ridging.
614 AM EDT Wed Mar 22 2017 High pressure will expand over the Great Lakes today providing dry but rather cold conditions through tonight. A warm front will approach and move through Thursday night with showers and warming temperatures.
Weakening southerlies should allow the lower levels to saturate back up. An upper level ridge of high pressure will move overhead of the area on Thursday and bring another day of high temperatures in the mid 80s.
355 AM CDT Wed Mar 22 2017 The backdoor cold front was starting to move in across portions of southwest AR and southeast OK early this morning, brining with it increasing cloud cover and perhaps initially some drizzle/very light rain. The cold front will make it to south of Interstate 20 before becoming diffused by late morning/early aftn. This front albeit weak, will still be capable of resulting in an obvious temp gradient of upper 60s to lower 70s across southwest AR, northeast TX and southeast OK, to the lower to middle 80s across deep east TX and central LA. Tomorrow however, above normal temps will make a return /80s/ courtesy of the weak cold front retreating as a warm front, coupled with an UA ridge passing overhead.
139 AM EDT Wed Mar 22 2017 Aviation A large area of high pressure over northern Minnesota will build southeast into Lower Michigan tonight and Wednesday.
High pressure will build in on Wednesday and bring a cold day to central Indiana. Temperatures will then warm up late week into the weekend, but along with the warmer temperatures will come frequent chances for rain with multiple systems moving through. Sprinkles had exited southeast portions of the forecast area within the last hour and skies were clearing from the north as high pressure builds south. Progressively drier air will expand south into the forecast area with the high overnight.
132 AM EDT Wed Mar 22 2017 A cold front will drop into the area tonight, then move through the area on Wednesday.
Warm front will move east across the forecast area today. Will maintain a slight chance of rain/freezing rain there this morning and go dry elsewhere. Much warmer air mass will move into the area today with highs from 50 NE to 65 SW. Upper ridge will move to the east today turning the flow aloft to the southwest. An upper trough will split today as it moves inland from the Pacific. Although the southern branch trough is expected to track well south of the forecast area, the SW flow ahead of it is expected to bring moisture tonight as far north as the southern zones of the forecast area. Will mention a slight chance or chance of rain as temperatures are expected to stay above freezing.
Today, we enjoy one more warm day with ridging aloft contributing to H7 temperatures of +4C to +6C. A lee trough is progged to strengthen on Thursday and move east across the high plains. Moisture will almost certainly be limited, but increasing dynamic support aloft combined w/ low-level convergence along the trough may yield afternoon convection for the high plains. Our attention then shifts to Thurs night and early Fri with the rapid intensification of the upper low along with significant surface cyclogenesis over southeast Colorado.
Tonight an upper ridge moves overhead so expecting mainly dry conditions tonight.
345 AM PDT Wed Mar 22 2017 Cooler than normal temperatures and unsettled conditions will prevail through Wednesday.
Otherwise expect a mostly cloudy to cloudy sky with low temperatures in the low to mid 30s. Clouds expected to be of the high variety for most of the area. Currently have high temperatures ranging from the low to mid 50s across the east (McCook to Gove and points east) with low to mid 60s along and west of the CO/KS border. Upper level trough with closed low height center transverses the Rockies and approaches the area on Thursday. Models have come into better agreement on the 12Z runs, keeping the closed low to the south of our CWA as it progresses to the east.
A thermal trough will develop this evening and bring stronger north winds and steep wind driven seas to the area by midnight.
Upper ridging, otherwise, will suppress storm development. Upper level ridge just off to the west will settle farther east and cover most of the southern half of the US by the weekend.
Upper low will propagate east to far western Ontario by tomorrow morning. Associated mid level impulse will continue to rotate through the fa with shra/isold T continuing mainly across the far north closer to vcnty of upper low. Deeper layered RH on back side of upper low will spread thicker cloud cover southward during the overnight so any clearing this evening will be short lived and limited to the far south. As deeper layered rh spreads southward on back side of departing upper low plenty of cloud cover expected across the region tomorrow.
Ridge will continue to dominate the weather pattern for the next couple of days with most convective suppression remaining across western portions of the forecast area. More robust moisture will be found across the eastern portions of the forecast area and this will be where the highest POP will be placed through the period. Did increase rain chances a bit in each period as ridge builds back to the west a little faster than earlier noted and gives more influence to the ECMWF guidance. Weakness/trough works from east to west over the weekend and will increase rain chances to above CLIMO. Otherwise temperatures will continue to be near normal for after highs and above normal on the lows.
802 PM EDT TUE JUL 12 2016 A trough of low pressure will strengthen across the interior Carolinas through the week as high pressure remains southeast over the Atlantic. Tonight: Fairly quiet conditions are expected as the area remains situated between Atlantic high pressure centered off the Southeast coast and a trough of low pressure inland. A deep layer of high pressure, centered southeast over the Atlantic, will continue across the region through the rest of the work week.
Southeast to south winds gusting to 20-26 KTS otherwise will continue to be a general aviation concern as a 40-45 KT low level jet partially mixes to the surface tonight and strong lee trough continues Wednesday. Upper ridging, otherwise, will suppress storm development. Upper level ridge just off to the west will settle farther east and cover most of the southern half of the US by the weekend.
510 PM MDT TUE JUL 12 2016 Dry conditions will prevail this afternoon with increasing cloudiness this afternoon and evening in advance of a fast moving short wave followed by a warm front. CAPE values will increase through the afternoon to near 2100 J/Kg as the warm front approaches with bulk shear at 30kt to 50kt (RAP), and DCAPE in the 400 J/Kg to 1000 J/Kg range.
Chattanooga Airport, TN 72 94 73 94 / 20 20 20 30 Knoxville McGhee Tyson Airport, TN 69 92 71 92 / 20 20 20 30 Oak Ridge, TN 69 92 72 91 / 20 30 20 30 Tri Cities Airport, TN 66 89 67 89 / 20 20 20 30.
1005 PM EDT TUE JUL 12 2016 A trough of low pressure will strengthen across the interior Carolinas through the week as high pressure remains southeast over the Atlantic. A deep layer of high pressure, centered southeast over the Atlantic, will continue across the region through the rest of the work week.
Lows will range from the low-mid 70s inland, with upper 70s expected along the coast.
811 PM EDT TUE JUL 12 2016 Upper level high pressure to our south will continue to ridge in to the Southeast through mid-week. Late this week, the upper ridge will weaken and shift to our east as a broad upper trough moves over the eastern US. The upper level ridge over the Southeast will generally inhibit convection over our area the rest of today.
Water vapor imagery showing upper wave rotating north into central Canada around an upper low over southern Saskatchewan, with another wave forming to its west. The more active period should come in the late evening to overnight hours as the low level jet increases resulting in decent convergence and isentropic lift around 850mb.
Embedded pieces of vorticity were rotating around the low and clipping northwest Minnesota. A cold front will follow/be associated with the trof that will begin to affect northeast Minnesota late tonight and move to the Twin Ports by late afternoon.
WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO At 900 pm a broad longwave trough extended from the Gulf of Alaska to the High Plains, with a low amplitude ridge over northern MX.
1040 PM EDT TUE JUL 12 2016 High pressure sliding to the east and an upper level ridge overhead will cause very warm and muggy weather for the middle of the week.
/issued 347 PM CDT TUE JUL 12 2016/ A weak mid-level trough over the Mid-South along with deep southwest flow is helping the isolated/scattered convection persist and move inland this afternoon.
1030 PM MDT TUE JUL 12 2016 Dry conditions will prevail this afternoon with increasing cloudiness this afternoon and evening in advance of a fast moving short wave followed by a warm front. CAPE values will increase through the afternoon to near 2100 J/Kg as the warm front approaches with bulk shear at 30kt to 50kt (RAP), and DCAPE in the 400 J/Kg to 1000 J/Kg range.
1257 AM EDT WED JUL 13 2016 Upper level high pressure to our south will continue to ridge in to the Southeast through mid-week. Late this week, the upper ridge will weaken and shift to our east as a broad upper trough moves over the eastern US. Further convective activity is not expected overnight due to the lack of forcing mechanisms and synoptic scale subsidence beneath an upper level ridge.
Cold upper low creating instability showers with isolated thunderstorms across much of the north half of the region this afternoon. The isolated thunderstorms generally across the north central where limited instability is focused ahead of a weak trough. on Wednesday will watch the upper low slowly lose its influence on the region with winds much diminished over today.
/ISSUED 343 PM CDT TUE JUL 12 2016/ Another hot and humid afternoon is well underway for Southeast Texas where afternoon temperatures have risen into the low 90s along the coast and mid to upper 90s inland. High temperatures on Wednesday are forecast to rise into the low 90s along the coast, with mid to upper 90s possible inland under partly cloudy skies. The region will remain on the eastern periphery of a 594-597 decameter upper ridge through the end of the week, with little to no overall pattern change resulting in a persistent forecast across the region. Expect afternoon temperatures to top out in the low 90s along the coast with mid to possibly upper 90s at inland locations and overnight lows in the upper 70s to low 80s through the weekend.
652 PM CDT TUE JUL 12 2016 A vigorous mid/upper trough was situated near the Canadian border over southern Manitoba and southwest Ontario. South of trough. Storms developing across central KS may dive SSE across much of the area again on Wed night as the low lvl moisture transport is progged to ramp up once again.
Several dry layers were noted in the lower and middle troposphere, and normally, the dry air entrainment associated with such dry air can adversely affect cumulus updrafts. A western Atlantic high pressure cell will remain the dominant weather system during the next five days, with a ridge vacillating north of the Florida Keys, maintaining east to southeast breezes.