Aikyam-Lab/Synoptic-Bench huggingface dataset:
913 PM EDT Mon Apr 25 2022 Dry conditions expected tonight, as high pressure remains situated offshore of the Southeast US. Overnight lows in the low to mid 60s inland and mid to upper 60s along the coast. Boating conditions continue to improve, with high pressure situated off of the Southeast coast.
635 PM CDT Mon Apr 25 2022 Key Messages: - Sub-freezing temperatures and widespread frost are expected tonight along and north of Highway 36 with areas of frost and temperatures in the mid 30s expected further south.
The cold front, across northwest Alabama, was marked by a drop of 5-10 degrees in dewpoint temperatures. 58/rose Previous short-term discussion: /Updated at 0129 PM CDT Mon Apr 25 2022/ A cold front continues to push southeastward into eastern Mississippi and far northwestern Alabama this afternoon. The upper ridge in the western Atlantic will finally break down, allowing an upper trough to move across the southeast by Tuesday evening. Cooler and drier air will filter southward through Tuesday night.
401 PM CDT Mon Apr 25 2022 Key Messages: - Sub-freezing temperatures and widespread frost are expected tonight along and north of Highway 36 with areas of frost and temperatures in the mid 30s expected further south.
Ridge of high pressure will continue to dominate today, while upper level low pressure moving into the Northeast pushes it offshore on Wednesday. Then, high pressure builds from the west behind it.
The cold front has moved well east of the area this morning, but some residual showers continue in the southeast. These showers will continue to be possible through the morning in the southeast, but high pressure will continue to build in through the day with clearing skies and cooler temperatures. As cool high pressure settles in overnight, lows will fall into the low to mid 40s across the area.
Highs on Wednesday are expected to climb into the low to mid 80s for much of central and south central KS.
436 AM EDT Tue Apr 26 2022 Currently - A narrow ridge off the Atlantic coast extends southwestward, reaching into the Florida Peninsula. This ridge is supporting moderate easterly breezes across the Keys and surrounding waters. To the west of this nearly meridional ridge is an advancing mid latitude trough over the eastern United States. The cold front associated with the mid latitude trough is expected to stall and die across Central of South Florida later this week. New high spreading southeastward off the Carolina coast and through the remains of the cold front. A ridge off the Carolina Coast will weaken as it migrates southeastward over the next couple of days.
A upper level ridge axis was located just west of the Front Range. Clockwise flow on the backside of the ridge was producing light southerly winds. Some high clouds associated with the upper level ridge will spread overhead tonight. A dry sub-cloud layer appears to be limiting potential for anything measurable, but have decided to add some low-end PoPs through 00z this evening when the primary trough axis should exit.
a broad upper level ridge axis moves over the area during the day ahead of an upper level trough over the northwest portion of the United States. High temperatures are expected to be in the lower to upper 70s under increasing afternoon high clouds. Low temperatures wont be as cold as the previous few nights with readings in the lower 40s to lower 50s. Low temperatures are forecast range from the lower 40s to lower 50s.
103 AM EDT Tue Apr 26 2022 A cold front will move east of the area this evening. Cold front has moved through, bringing cooler air on a decreasing northwest flow. This will bring cooler air aloft. Meanwhile high pressure will be gradually building in at the surface.
303 AM EDT Tue Apr 26 2022 A cold front will cross the local area from northwest to southeast this afternoon and this evening.
Latest water vapor imagery shows a weak yet broad trough axis extending from low pressure centered over Ontario into the central Plains. Upstream of this was weak ridging over the Rockies and upstream of that was another low off the Pacific coast of British Columbia. Tuesday morning lows should all drop below freezing across much of the area so anyone with sensitive vegetation outdoors will want to take some protective measures overnight. Although we may see the lower RH values northeast of the Red Flag Warning, we may have a tough time getting the stronger winds in that area. An attendant warm front is then forecast to extend eastward into south- central and southeast Nebraska by late Wednesday afternoon into the the early evening hours.
The cold front, across northwest Alabama, was marked by a drop of 5-10 degrees in dewpoint temperatures. 58/rose Previous short-term discussion: /Updated at 129 PM CDT Mon Apr 25 2022/ A cold front continues to push southeastward into eastern Mississippi and far northwestern Alabama this afternoon. The upper ridge in the western Atlantic will finally break down, allowing an upper trough to move across the southeast by Tuesday evening. Cooler and drier air will filter southward through Tuesday night.
130 AM CDT Tue Apr 26 2022 The cold front has finally moved east of Middle Tennessee, and we are left with still quite a bit of post-frontal showers affecting mainly the Cumberland Plateau and areas just to the west of the escarpment. Skies will clear out rapidly today, but afternoon temperatures will be considerably cooler than the past few days of abnormally warm readings.
Periods of light rain will continue through the morning hours as a cold front nudges east and mid/upper-level moisture overspreads the front. /NF/ Prior discussion below: Through Tuesday: A convectively induced cold pool and associated thundershower activity continue to progress southeast across the forecast area with the primary synoptic scale cold front lagging behind just a bit. Otherwise the main story will be significantly cooler weather as continental polar air surges southward through MS Valley region.
An upper level trough will continue to move east across the area tonight into Tuesday and weaken. Ahead of the trough, a weak sfc cold front will continue to make slow progress across the Gulf coast tonight into early Tuesday, before moving offshore by late Tuesday morning. A drier and slightly cooler airmass continues through Wednesday. Lows tonight range from the low to mid 60s inland to upper 60s near the coast. Highs on Tuesday will be in the low to mid 70s in the northwest to low 80s in the southeast. Lows will be much cooler Tuesday night, in the mid and upper 40s inland to upper 50s along the coast.
411 AM EDT Tue Apr 26 2022 A cold front will cross the area today. High pressure will build southward from Canada from Wednesday through the end of the week.
354 AM CDT Tue Apr 26 2022 Key Messages: - Frost/Freeze conditions continue this morning - Red Flag Warning for Republic, Cloud, and Ottawa counties this afternoon - Chance for showers and storms increase late Wednesday through the end of the week Surface ridging is in control of the middle part of the CONUS this morning with light winds and clear skies allowing temperatures to fall into the low to mid 30s.
A mix of MVFR/IFR (and some brief VFR) ceilings noted across the CWA tonight in the wake of the cold front and all of its associ- ated activity.
High pressure and clearing skies will build in through the morning hours, with all sites becoming VFR after 17-18Z. Periods of light rain will continue through the morning hours as a cold front nudges east and mid/upper-level moisture overspreads the front. /NF/ Prior discussion below: Through Tuesday: A convectively induced cold pool and associated thundershower activity continue to progress southeast across the forecast area with the primary synoptic scale cold front lagging behind just a bit. Otherwise the main story will be significantly cooler weather as continental polar air surges southward through MS Valley region.
Highest potential for SHRA/TSRA will be northwest of TLH/VLD this afternoon and evening with the passage of a cold front. Mostly dry and warm conditions will continue until a cold front pushes through the area Tuesday afternoon and evening. Lingering isolated showers and storms will be possible Tuesday evening as the cold front crosses the area, but these storms will dissipate with the loss of daytime heating. High pressure returns in the wake of the cold front with some slightly cooler air returning. Lows Tuesday night will range from the lower 50s in the Wiregrass to the mid-60s in the southeast Big Bend.
A short wave trough extending south will move through the OH Valley today and into the eastern CONUS by tonight. This will finally dislodge the persistent SE CONUS ridge, pushing it into the western Atlantic. As the trough feature slows near to south of the immediate area, expect sct rain coverage along with some storms possible during Thu as the boundary slows over the southern peninsula and Nrn Bahamas, with a diminishing chc of rainfall mentioned across the southern half of the forecast area during Fri. Broad high pressure moving seaward from the SE and Mid Atlc coast should allow for marginally higher moisture return to central FL this weekend.
Gusty NE winds will taper through the day as high pressure draws closer. Winds have increased over the coastal region as gradient has increase due to low pressure forming near Falcon Lake.
The main concerns in the forecast will be near-critical fire weather conditions today, sub-freezing temperatures overnight, critical fire weather conditions Tuesday, and a few chances for precipitation over second half of the week. Temperatures around the freezing mark will be possible across North Central Kansas and areas south of I-80 in Nebraska.
107 AM CDT Tue Apr 26 2022 (This evening through Tuesday) Drier air will continue to move in behind the cold front overnight with showers and thunderstorms. After a cool start in the 40s to lower 50s Tuesday morning, most sunny skies will allow temperatures to rise to highs in the lower to mid 70s.
351 AM EDT Tue Apr 26 2022 High pressure will build in from the west for mid week bringing below average temperatures and the chance for frost Tuesday night and Wednesday night. High pressure shifts east by the end of the week allowing southerly flow to return along with moderating temperatures. High pressure continues to build in from the west today. Frost will be likely tonight thanks to high pressure moving overhead along with clearing skies and relatively calm winds. Forecast lows are in the low to middle 30s north of the Ohio River and middle 30s along and south of the Ohio River. Some subfreezing temperatures are also possible across Ohio and eastern Indiana in rural locations. High pressure remains overhead on Wednesday bringing mostly sunny skies and below average temperatures.
Dry and cooler conditions will continue through midweek. /issued 352 PM CDT Mon Apr 25 2022/ A cold front is pushing through the Mid South this afternoon. You can already feel the cooler and drier conditions outside this afternoon. Temps will warm through late week, under an amplifying upper ridge.
333 AM CDT Tue Apr 26 2022 Upper level trough in the Great Lakes region was keeping a cyclonic flow across our northeast cwa, resulting in persistent low stratus. This of course has kept temperatures well above freezing in portions of nw IL, and the freeze warning was cancelled. Today: Short range models doing a poor performance with the low stratus that has been persistent across roughly our ne half. Northwest to north winds will also be gusting up to 25 to 30 mph in nw IL closer to the low pressure in the Great Lakes.
148 AM EDT Tue Apr 26 2022 Regional radar imagery shows showers are still hung up along the plateau late this evening, just ahead of the surface cold front which is now between Nashville and Cookeville. Satellite and radar imagery show a cold front along the Plateau with associated rain showers. Over the next few hours cigs will deteriorate to MVFR at all terminals as the cold front and precipitation advance eastward. KS Chattanooga Airport, TN 70 45 72 47 77 / 30 0 0 0 0 Knoxville McGhee Tyson Airport, TN 67 41 69 44 73 / 80 0 0 0 0 Oak Ridge, TN 67 41 69 44 73 / 50 0 0 0 0 Tri Cities Airport, TN 65 38 65 38 68 / 70 0 0 0 0.
356 AM EDT Tue Apr 26 2022 Warm weather again today, but a cold front tonight will bring big changes. The cold front will be the main focus of the near term period, however a dry morning/midday is on tap with a mid-level ridge axis still in place along the East coast. highs in the mid/upr 80s inland, with lows in the low/mid 50s tonight. Dry and cool weather in store for the short term period following Tuesday night's cold front.
Cold front has pretty much pushed thru the forecast area late this afternoon, and some lingering precipitation will persist in the southeastern zones for a short while this evening. The upper level trof over the region will continue to push eastward overnight, and a weak ridge will start to build in tomorrow. The lagging trof will allow a considerable amount of high level clouds to loiter over the area tonight. Cooler and drier air is filtering into the region, and this should allow for fairly mild afternoon temperatures tomorrow and Wednesdays, with highs in the upper 60s to the lower 70's in most areas.
VFR conditions this evening will become MVFR to IFR tonight as a cold front moves into the area. An upper level trough will continue to move east across the area tonight into Tuesday and weaken. Ahead of the trough, a weak sfc cold front will continue to make slow progress across the Gulf coast tonight into early Tuesday, before moving offshore by late Tuesday morning. A drier and slightly cooler airmass continues through Wednesday. Lows tonight range from the low to mid 60s inland to upper 60s near the coast. Highs on Tuesday will be in the low to mid 70s in the northwest to low 80s in the southeast. Lows will be much cooler Tuesday night, in the mid and upper 40s inland to upper 50s along the coast.
Following the cold front passage, northwest winds are bringing cooler and drier air for the next 48 hours or so. Lows will be in the lower to mid 40s for most areas. Conditions will be ideal for radiational cooling, which normally favors the cooler mos guidance over nbm guidance.
Meanwhile at mid levels we have low-amplitude ridging over the Intermountain West in between one trough impacting Ontario and the Upper Midwest and another trough off the British Columbia coast. This setup for radiational cooling will bring temperatures down to the low to mid 30s area-wide. Have made no changes to frost/freeze headlines at this point, as the counties along the KS/NE border have the best potential to reach or fall below the freezing mark. The aforementioned mid- level ridge starts to traverse the area, keeping breezy conditions in place as the surface lee trough continues to deepen.
I did retain some slight chance PoPs across the far southern zones through the overnight hours as an upper trough axis is still to the west of Oklahoma and Texas and will move across the forecast area during the overnight hours.
(Today through Wednesday afternoon) Surface ridging will slide east today with southeast winds returning to the area. A few showers and maybe an isolated storm are possible this afternoon across the Lower Trans Pecos where the old front lies. Expect highs to climb into the 80's west of this boundary across SE NM south into the Big Bend while the Permian Basin stay a bit cooler due to more moisture.
133 AM EDT Tue Apr 26 2022 Aviation --Unseasonably Cold through Midweek; A Few Light Showers-- Upper trough digs south into the Great Lakes Region tonight and Tuesday, accompanied by unseasonably cold H8 temps which bottom out around minus 10C at 12Z Wednesday. High temperatures will be only in the lower to mid 40s Tuesday and Wednesday, with lows mostly in the 20s Tuesday night and Wednesday night. Cold cyclonic flow pattern will lead to considerable cloudiness through mid week, and a series of sfc cold fronts/troughs will trigger scattered showers from time to time.
923 PM PDT Mon Apr 25 2022 A cooling trend is in store for SoCal over the next few days as a troughing pattern takes hold across the region. Subtle ridging aloft will take over by the weekend, bringing slight warming. The 00z Miramar sounding indicated a weak inversion based just below 1000 FT MSL, albeit with dry air at low levels with dewpoints in the lower 30s. A ridge of high pressure over the Southwest is contributing to our clear skies and warm temperatures this afternoon with offshore flow dwindling. This trough will increase our onshore flow pattern, leading to breezy west winds for the mountains and deserts. Widespread gusts 25 to 40 MPH can be expected with the trough's passage Tuesday afternoon through early Wednesday morning.
323 AM CDT Tue Apr 26 2022 Key Messages: - A cold start to the day with widespread frost across the entire area and subfreezing temperatures along and north of Highway 36.
1040 PM MDT Mon Apr 25 2022 A transient ridge will be over the region today, warming temperatures back to seasonal normals.
A cold front will work its way across Idaho this afternoon and evening bringing some light high-elevation snow to the Stanley Basin. The passage of the cold front could briefly push winds above 40 mph around the INL and Mud Lake areas. Current guidance keeps us just shy of Lake Wind criteria on American Falls Reservoir The upper trough should exit to the northeast by 9 pm, but the surface cold front may linger over the UT border overnight and into tomorrow, where precipitation may continue through the night.
However, it will take several hours for cooler/drier air to begin advecting into the region, and isolated to widely scattered light showers may still occur in the postfrontal airmass through the early morning hours. There are some indications that mid-level ascent will increase after 6Z, as a vort max digs southeastward into southern MO, amplifying the broader mid-level trough to our west. High pressure building in will keep conditions dry Tuesday and Wednesday and clear out most of the cloud cover. As winds slack, combined with those clear skies Tuesday night, overnight lows will fall into the lower 40s. With plentiful sunshine on Wednesday, look for highs in the lower 70s and lows slightly warmer, reaching the mid/upper 40s.
1126 PM MDT Mon Apr 25 2022 An upper level ridge will slide east across the area tonight. A nearly stationary upper level low off the coast of British Columbia will steer a series of upper level troughs across the Pacific NW and northern Rockies over the coming days. Expect breezy and gusty winds Tuesday afternoon in the 25 to 40 mph range and temperatures a good 10 to 12 degrees warmer than today. So only minor, if any, snow accumulations are expected on the highest peaks.
Adjusted sky cover over the next few hours as the western edge of the low level stratus deck continues to decay. Northwest flow continues as a low pressure clipper aloft moves south from southern Canada into Minnesota tonight, no precipitation expected.
332 AM EDT Tue Apr 26 2022 Discussion/Marine/Climate -- Showers Today -- Upper-level trough (closed low at 500 mb) and 850 cold air advection will leave us prone to showers developing today, reaching their peak in the afternoon with diurnal instability.
Beginning at 00z Wednesday, a ~1033 mb arctic ridge over northwest Ontario builds southeast into the Upper Great Lakes. Mostly sunny skies and lighter surface winds across the interior could allow for a warmer temps than currently forecast. Tried to reflect this in temp grids with warmer guidance for counties bordering Wisconsin and cooler guidance near the lake. Surface ridging settles overhead Wednesday night with clear skies and light winds setting the stage for near record cold temperatures.
249 AM MDT Tue Apr 26 2022 Satellite imagery shows ridge axis over our region with an upstream trof along the Pacific coast. As the ridge shifts east, backing flow aloft will bring warmer air ahead of a cold front that will arrive this evening. Temps will be post-frontal and a bit cooler with highs in the mid 50s to mid 60s.
338 AM EDT Tue Apr 26 2022 A few showers extend along a cold front nearing northwest Georgia early this morning. The cold front will make steady progress southeastward through the day, reaching the Atlanta area by mid- morning. Skies will clear from northwest to southeast from late afternoon into this evening behind the front as drier and cooler air builds into the area. Much of the Southeastern CONUS will be under northwesterly flow aloft ahead of a broad upper level ridge over the Great Plains. At the surface, weak high pressure centered well to the north of the forecast area will begin to move towards the Mid-Atlantic coast.
111 AM CDT Tue Apr 26 2022 Upper level high pressure ridge axis just west of the area early this morning will move overhead later today. Isolated freezing temps will be possible in low lying areas especially across the extreme southwestern Texas Panhandle. Upper ridging will move over the region tomorrow and will help warm temps back into the mid 70s. A surface lee trough will veer winds back to the south to southeast with speeds generally around 10-20 mph.
(Today and tonight) A weak upper ridge will start building overhead as the Southern Plains should remain dry in the short term with a gradual warming trend. Our area should see plenty of sunshine today as high pressure settles across the area with temperatures rebounding closer to seasonably average. Did go slighlty warmer than NBM and closer to MOS guidance with this afternoons MaxT using the CONSMOS.
TFJ High pressure moving through the northern plains today with sunny skies and warm temperatures for most of the area. As lee trof develops over central Montana, southeast winds will begin to increase, but should remain Lake Wind criteria. A few showers are possible with this trof, mainly for the western zones.
/Today through Wednesday/ Upper level trough quickly exiting the Plains later this morning, entering the Ohio Valley, taking the upper forcing with it. Sfc ridging will remain north and west of our area this morning, shifting northeast of our region this afternoon and this will keep NNE to NE winds prevailing across our entire region. Stayed close to the warmer side of guidance today concerning temperatures with afternoon highs ranging in the lower 70s north and east to the mid 70s south. A returning ESE to SE wind on Wednesday will begin the warming trend across our region and have therefore continued the trend of remaining on the warmer side of MOS guidance.
Cooler and drier conditions filter in post frontal passage. Discussion: Current observations suggest that the surface cold front is located along the eastern portions of the Plateau, where the rain showers observed on radar have recently started to increase in coverage area over the past few hours. This cold front will continue to advance eastwards into the morning and early afternoon hours of Tuesday as additional forcing from the right entrance region of an upper level jet moves across the area as well. Cooler and drier conditions will filter in behind the front as skies clear out Tuesday night. Forecast highs are roughly 10-15 degrees cooler than the previous days. These cooler temperates will lead to overnight lows ranging from the mid 30s to mid 40s.
Northwest flow aloft will give way to continued dry conditions in the short term period as a leeside trough develops into early Tuesday morning deepening with daytime heating after sunrise. Morning low temperatures in the low to mid 30s with most staying above the freezing mark. Afternoon highs will start to rebound back to at or above average into the low to mid 70s with the return southerly flow.
Surface ridging will be situated over E Conus Wednesday with a picture perfect day in store after a cool start including lots of sunshine, N winds~10mph, low humidity, and rain free conditions with highs in the 70s.