Aikyam-Lab/Synoptic-Bench huggingface dataset:
637 AM CDT Mon Apr 12 2021 For the 12Z TAFs, winds will continue to diminish this morning in the wake of the latest cold frontal passage. Surface winds will remain gusty this morning behind the latest cold frontal passage. Dry weather is in store for tonight with low temperatures ranging from the lower 30s across northwest sections to lower 40s in the southeast Texas Panhandle by sunrise Tuesday. An upper level low pressure storm system is forecast to dig southward from Washington to northern Nevada by late Tuesday afternoon and then drift to eastern Nevada Tuesday night.
536 AM CDT Mon Apr 12 2021 No hopping off the upper low train just yet as once more a digging trough morphs into an expansive closed upper low over the Dakotas and Minnesota early this morning. A frontogenetic-driven band of showers associated with this upper low stretches from ND into southwest MN. The negatively tilted surface/upper lows will become better phased as the day wears on, with a small north/south displacement by afternoon.
Elsewhere, patches of light to moderate rain are traversing across the Middle and Upper Keys, with widely scattered showers on the outer Straits south of the Lower Keys. Thereafter, high pressure will nose southward into our area, resulting in limited moisture so rain free conditions can be expected beginning tonight. Temperatures will climb into the lower to mid 80s, as winds shift southwest to west along with some insolation anticipated by mid afternoon.
959 AM EDT Mon Apr 12 2021 The cold front that moved through the peninsula yesterday is now located over southern Florida. Temperatures are already in the 70's and will warm up into the low to mid 80's this afternoon. Clearing conditions and winds 10 knots of less expected over the eastern gulf waters the next couple of days as a cold front moves south of Florida and high pressure builds in from the north.
710 AM EDT Mon Apr 12 2021 A showery and seasonably cooler early-spring weather pattern will plague central Pennsylvania this week. Despite only a few hundred j/kg of cape, another potential call out might be the risk for pea size hail with relatively steep lapse rates and low freezing level/Tw0 heights beneath closed upper low. Expect shower coverage to ramp up today as a closed upper low moves over the Commonwealth. Highs trend anywhere from 5 to 15 degrees cooler than yesterday generally ranging in the mid 50s to low 60s. Loss of diurnal heating combined with increasing subsidence and ridging aloft behind departing closed low should result in decreasing coverage of showers tonight.
The lower clouds are likely to persist through the morning with a slow rise to VFR by or shortly after Noon. /issued 330 AM CDT Mon Apr 12 2021/ SHORT TERM (Now through Tuesday):Mid-level high pressure traverses the state today as a stationary front south of the Rio Grande weakens and dissipates over the next 24 hours. Temperature guidance trends a few degrees warmer than yesterday with upper 80s RGV to mid 90s west. Lower clouds increase and some patchy coastal fog is possible with temperatures lowering into the lower 70s approaching the elevated dew points.
A cold front has cleared all of our TAF sites and is now nearly stationary across far southeastern Oklahoma extending northeastward to just south of KFSM which is reporting a northerly wind at this time. Clouds will also increase as well thanks to the the aforementioned cold front getting hung up across SE OK. /Issued 337 AM CDT Mon Apr 12 2021/ Cold front currently near a KMLC - KFYV line and is making slow progress southward as upstream pressure rises are increasingly focused westward. The cold front will push more southward on Tuesday in wake of the passing weak wave with the entire forecast area experiencing a period of below normal temperatures which will likely persist through the remainder of the forecast.
(Today and tonight) The cold front is currently located from just north of Wichita Falls to Pauls Valley to Seminole.
651 AM EDT Mon Apr 12 2021 Mostly cloudy skies and a few showers will persist today in the moist flow behind low pressure. High pressure is forecast to bring dry weather to most of the area on Tuesday, though isolated showers associated with a weak disturbance may affect southern locations.
626 AM EDT Mon Apr 12 2021 Fair and dry weather expected early this week with above normal temperatures with high pressure and northwesterly flow over the region. Chances of rain increase Wed/Thu as an upper trough dives southeast from the Great Lakes into the Mid-Atlantic region and pushes a cold front through our area. Slightly cooler temperatures are expected late in the week into the weekend. Upper disturbance moving through our region early this morning, with an upper low moving SE through the Mid Atlantic today and tonight, will lead to a dry NW flow aloft for our region.
The majority of the high clouds in place will shift east of the forecast area this morning, with mostly sunny/clear skies expected through Tuesday.
633 AM CDT Mon Apr 12 2021 (Today and tonight) The cold front is currently located from just north of Wichita Falls to Pauls Valley to Seminole.
Temperatures have fallen to near freezing in these areas with middle 30s across the central Red River Valley into west-central Minnesota. A negatively tilted trough is in the process of closing off into an H5 low this morning. High temperatures will top out in the lower to middle 30s from the Red River Valley westward, with middle to upper 30s to the east. Most of the forecast area is expected to fall below freezing by 00Z or shortly thereafter. Snow is expected to continue, with our best chances for accumulations expected during this time as surface temperatures fall below freezing.
731 AM EDT Mon Apr 12 2021 Aviation - Isolated to scattered showers and colder this week -- Isolated to scattered showers and colder this week -- The slow moving upper low that meandered it's way from the southern Plains is over western Lake Erie this morning. This upper low will move east today and be replaced by another upper low that's moving across the northern tier of states.
703 AM EDT Mon Apr 12 2021 Scattered showers are expected today with crossing low pressure. A closed mid/upper level low is expected to track across the Upper Ohio Valley region today. Increasing layer moisture and ascent in the vicinity of the low should result in scattered showers developing this morning. Shower coverage should wane tonight as the low tracks to the Mid Atlantic coast, and temperatures fall below convective thresholds.
High pressure currently present over the state will continue to push east. Today Through Tuesday Night Early this morning, a cold front was located from north central through west central Arkansas/eastern Oklahoma.
This low pressure system will have very limited moisture since it originated over the dry terrain of western Canada instead of over the Pacific.
An upper ridge will build over British Columbia while an upper level low develops over the Great Basin this week. A few showers will be possible this afternoon near the Cascade Crest as a weak upper trough moves south across Eastern Washington.
High pressure and offshore flow continues to bring clear skies and dry conditions to the region this morning. In general temperatures are warmer this morning than yesterday morning, but there are still a few areas of patchy frost so will leave the frost advisories in place. Tonight into Tuesday an upper level low drops down south into eastern Oregon and this Will weaken the pressure gradient. The most notable change will be temperatures 5 to 10 degrees cooler across the interior areas.
426 AM CDT Mon Apr 12 2021 A weak and dry cold front extending from near IRK southwest to just west of COU will move southeastward through our forecast area today. Will only see slightly cooler high temperatures today across northeast and central MO. Slightly cooler high temperatures can be expected on Tuesday, a tad below normal.
High temperatures will range from the low 50s to mid-50s in Eastern Colorado to the upper 50s to lower 60s across Northwest Kansas and Southwestern Nebraska. Temperatures will be slightly cooler than Monday, ranging from the upper 40s to the mid-50s. Return flow around the high will bring some warm, moist gulf air into the region through the day.
100 PM CDT Mon Apr 12 2021 No hopping off the upper low train just yet as once more a digging trough morphs into an expansive closed upper low over the Dakotas and Minnesota early this morning. A frontogenetic-driven band of showers associated with this upper low stretches from ND into southwest MN. The negatively tilted surface/upper lows will become better phased as the day wears on, with a small north/south displacement by afternoon.
Forecast Summary: Forecast remains on track through the weekend, with mostly below- normal temperatures each afternoon, and lows flirting with freezing many mornings.
152 PM MDT Mon Apr 12 2021 A trough covers the northern plains, with the upper low centered over MN. A 90-kt jet is rounding the base of the trough, over southern SD.
Temperatures have warmed nicely into the lower to mid 60s east of I-65 and the mid 60s to lower 70s west of I-65. Winds are a bit breezy this afternoon with gusts up to 20 - 25 mph being observed, and the highest gusts generally across eastern KY. Temperatures for the day will be a bit cooler than today, topping out in the mid to upper 60s. as a ridge slowly builds into the western CONUS while two strong, deep upper level lows sit over the Gulf of Alaska and the Intermountain West region.
This trough and associated lift along a weak low-level jet over the southern CWA will lead to increasing precipitation chances for mid/late this evening into tonight as a dry airmass in the low levels of the atmosphere will work to delay rain reaching the ground. 25 inches or less, with the highest of these amounts again along and south of Interstate 44. Partly cloudy skies and northerly winds will lead to cooler high temperatures in the low 60s.
209 PM CDT Mon Apr 12 2021 An upper low spiraling over Minnesota through Tuesday will continue to bring occasional shower chances as pieces of energy rotate around it. Overnight, would expect isolated showers at times, especially across our northwest closer to the upper low.
Temperatures will be warmer than normal through the period. Highs Tuesday will climb back into the lower 80s at most locations but top out in the upper 70s in our southwest due to the rain and associated cloud cover.
Most of the activity was moving from north to south around the circulation of an upper level low. Upper low will linger over the northern plains for a few days. With the colder air being pulled southward around the low, most of the precipitation will occur as snow, with accumulations possible in the heavier bands. By mid week, a ridge will build from west to east across the region, which will result in dryer and warmer weather conditions across the area through the end of the week.
339 PM CDT Mon Apr 12 2021 A pair of closed lows were present across the CONUS this afternoon with the first over the Upper Midwest and the second progressing towards the Mid-Atlantic states. At the surface, a ridge axis extends from the Northern High Plains into western Kansas. All- in-all, it has been a fairly nice spring day although the northwesterly wind has kept high temperatures in the upper 50s and low 60s, about 10-20 degrees cooler than yesterday's highs. The passage of this trough along with 925mb winds of 25-30kts could keep surface winds around 5-10 mph. For Tuesday, a modified cold front pushes south across the CWA with lift in the right entrance region of the upper jet and the passage of another weak mid-level wave leading to additional mid and high clouds through the day.
1154 AM EDT Mon Apr 12 2021 Mostly cloudy skies and a few showers will persist today in the moist flow behind low pressure. High pressure is forecast to bring dry weather to most of the area on Tuesday, though isolated showers associated with a weak disturbance may affect southern locations.
After sunrise Tuesday morning, expect the front to retreat north a bit as a warm front causing winds to shift out of the east-northeast for most area TAF sites. High pressure currently present over the state will continue to push east. Today Through Tuesday Night Early this morning, a cold front was located from north central through west central Arkansas/eastern Oklahoma.
215 PM CDT Mon Apr 12 2021 Short wave energy will top an inverted surface trof/boundary and touch off some shower activity tonight-early Tuesday.
Issued by National Weather Service Omaha/Valley NE 242 PM CDT Mon Apr 12 2021 The primary forecast foci are on another day of elevated fire danger Tuesday, a late week storm system, and periods of sub- freezing temperatures.
Northern Michigan currently under the transition between these systems, although the upper Mississippi Valley low is gradually flexing more of its muscle on our weather as its attendant developing warm front begins to bow northeast through the region. Initial band of showers tied to departing low decaying as surge of isentropic ascent tied to passing warm front becomes the primary driver for additional shower development. This low will eventually kick slowly off to the southeast in the coming days, crossing our area and bringing with it more showers and a continued return to cooler weather. Step-down process to a cooler weather regime continues, with lows ranging from the upper 30s to lower 40s.
High pressure will dominate our weather today but big changes will occur beginning tomorrow and last through the week. No updates to the current forecast as latest model runs still supporting easterly downslope winds across northern Wasatch Front and Cache valley tonight as a low pressure system forms over northwest Nevada tonight. As this low progresses southeast tomorrow southwest winds ahead of it will increase over southern portions of the forecast area.
Upper low over the northern plains is wrapping moisture and weak disturbances across Montana and Wyoming east of the divide this morning, generating isolated to scattered snow showers. This activity will increase some as we go into the afternoon hours with good instability and some weak CAPE in the lower 15kft of the atmosphere. Chambers Cyclonic flow will prevail today thanks to an upper low over the northern plains. On Tuesday we will be sandwiched between an upper low over the Great Lakes area and one digging southward over the west into Nevada. Model solutions have been moving the position of the low around, which is resulting in changes in the probability of precipitation and precipitation amounts.
The best chance for showers should be over the northern half of the CWA, closest to an approaching cold front. The cold front will slowly move across the CWA and will probably stall near the US Highway 59 corridor by afternoon. Temperatures ahead of the front should warm into the lower and middle 80's and fcst soundings show convective temperatures of around 80-81 degrees. Weak low pressure will develop along the front Tuesday night and this feature will tug the weak front back to the north and convection should continue Tuesday night along and just north of the front.
Another cool night tonight as the low- level airmass remains fairly dry and skies remain generally clear.
845 AM PDT Mon Apr 12 2021 Cooling will intensify today and Tuesday as low pressure develops over the Great Basin.
255 PM EDT Mon Apr 12 2021 A showery and seasonably cooler early-spring weather pattern will plague central Pennsylvania this week.
The lower atmosphere will be quite dry tonight and only slightly more moist Tuesday. RMcQueen Not much change in the forecast as the unsettled pattern will persist through the extended with cooler than normal temperatures and almost daily precip chances for many locations.
358 PM EDT Mon Apr 12 2021 Dry high pressure will prevail into mid week.
Clear and dry conditions continue through tonight as ridging both at the surface and aloft continues over the area. Lows tonight will be in the low to mid 50s inland to around 60 near the coast. Highs on Tuesday will be in the low 80s across western areas with areas along and east of I-65 and north of I-10 potentially warming into the upper 80s.
These are associated with a larger-scale upper cyclone that will move from Washington into the Great Basin by Tuesday. With the surface cold front south of the Red River, but moisture above the surface expected to increase northward over the surface front later tonight.
Near the surface, high pressure extends southeast from the high plains of eastern Wyoming into western Kansas. Much drier air in the lower/mid levels and weaker westerlies aloft will limit precip chances in southwest/central Kansas through late Tuesday afternoon.
The area remained positioned in a west to northwest flow pattern, with a pair of upper level lows across the northern US. Highs today will range from the lower to middle 60s along and north of Interstate 44, to the lower 70s across south central Missouri where the front will take longer to clear. Given the dry airmass in place today in the low levels, there will be some initial work to saturate the airmass, however this does look to occur with at least scattered showers and perhaps and isolated thunderstorm developing across northeast Oklahoma and spreading northeast into southwest Missouri> This looks to occur generally after dark, with the highest chances from 10pm-6am. North winds and partly to mostly cloudy skies will keep high temps in the lower 60s.
132 PM EDT Mon Apr 12 2021 Fair and dry weather expected early this week with above normal temperatures with high pressure and northwesterly flow over the region.
Issued by National Weather Service Omaha/Valley NE 242 PM CDT Mon Apr 12 2021 The primary forecast foci are another day of elevated fire danger Tuesday, a late week storm system, and periods of sub-freezing temperatures.
High pressure conditions are set into place for today resulting in clear skies and mild winds.
The resident closed low pressure system rotates slowly across Lake Erie today while sustaining showers in a range of coverage across SE MI. Coverage to the north then decreases this afternoon as the larger northern Plains upper level low shears eastward into the Midwest. The corridor of dry air is shown to hold through the day while a reinforcing cold front approaches from the west.
VFR through the period as high pressure dominates amidst mostly clear skies and gusty wly/nwly winds. CDG Chattanooga Airport, TN 53 79 54 73 46 / 0 10 10 30 20 Knoxville McGhee Tyson Airport, TN 50 73 52 71 45 / 0 20 20 30 20 Oak Ridge, TN 49 73 51 70 43 / 0 20 20 30 20 Tri Cities Airport, TN 45 69 48 68 42 / 0 20 10 40 30.
Upper low over nrn OH will finally release and kickout into the wrn Atl tonight. Blocking ridge across the Davis Strait will finally breakdown this period with a perturbation rich, progressive nrn stream flow pattern to result across the lakes/srn Canada. Following this, clouds diminish notably early tonight as high pressure slowly noses in.
Mostly sunny conditions expected on Tuesday and with a moderating airmass we'll see afternoon readings a few degrees warmer than today. Could see our typically warmer spots even make a run at 90.
257 PM CDT Mon Apr 12 2021 A low pressure system remains set over the Northern Plains while the cold front that moved through yesterday is stretched across central Texas to western Arkansas.
High pressure centered over the Great Plains is nosing its way into the lower Ohio Valley. This combined with height rises aloft (short wave ridging) is helping to clear out the some of the lingering cloud cover associated with a low pressure system over the Great Lakes. This action will be short lived however, as the aforementioned short wave impulses induce a couple surface waves of low pressure which track through the Ohio Valley by Tuesday and especially Tuesday night. Sensible weather features a general clearing trend overnight, though high pressure does not appear strong enough to keep cloud totally out of the region. The period begins with fairly zonal flow and a cold front positioned to the east along the Appalachians.
Conditions will be quite similar today to what they were yesterday, although afternoon temperatures will be about 5 to 10 degrees warmer than yesterday. An upper level trough digs over the area late today into Tuesday and this will bring a round of strong winds to area.
209 PM CDT Mon Apr 12 2021 A strung out upper low/shear axis over the region will gradually shift to the east through mid-week. Some snow accumulation is possible given how cold the temperatures are expected overnight, of course mainly over the higher elevations of the Coteau. For Tuesday night the upper low continues to shear off to the east, with any lingering pcpn gradually ending over the forecast area.
153 PM EDT Mon Apr 12 2021 A closed upper low remains southeast of the Great Lakes region with the associated trough just off the eastern seaboard.
/22/ Mid morning surface analysis had 1014mb high centered over the Florida panhandle and a stalled cold front just west of the ArkLaTex. Although a few clouds will move in from the west this afternoon high pressure will dominate from the east today. Dry weather with warmer than normal temperatures is expected and the current forecast handles this well. At the surface, high pressure over the northeast Gulf, will turn our winds to a more southerly direction today, but displacing the dry air in place will take some time. Despite the weak low level moisture return, mid and high level moisture will begin spilling over the ridge this afternoon mainly in the form of cirrus.
226 PM CDT Mon Apr 12 2021 Upper low over MN today with near zonal flow across the area.
221 PM MDT Mon Apr 12 2021 Instability combined with impulses rotating around large upper low over the northern plains has produced scattered light snow showers across most of the forecast area this afternoon. Tuesday will see less snow shower activity as upper low to the northeast shifts a bit farther away from the area and developing system to the southwest gets organized, putting our area in between with a bit more mid level subsidence in place.
As the upper low moves east, activity in central Ohio could persist through the late day as the convergent band will then be placed there. Temperatures are forecast to rise from the low to mid 40s tonight up to the 60s on Tuesday.
204 PM CDT Mon Apr 12 2021 Temperatures as of early this afternoon are already in the mid to upper 70s and expect most locations will continue to climb into the low 80s. These high heights aloft are leading to these warmer temperatures. With the ridge overhead, do not expect any precipitation will develop along this boundary overnight. Overnight lows will be mild in the low to mid 50s. The upper ridge axis will shift to the east tonight into early Tuesday. An upper level closed low will be located over the Upper Midwest on Tuesday. A cold front associated with this closed low will push southeastward across the southern and central Plains.
For the rest of this afternoon into tonight, upper low and affiliate surface features continue to meander over the area, while secondary upper low scoots off to the east. With some slush remaining on some roads in the north, combined with latest road temperature forecasts showing road surfaces dropping below freezing, expect wet slushy roads to freeze up and some snow accumulation to develop.