Aikyam-Lab/Synoptic-Bench huggingface dataset:
1148 AM MDT Thu Mar 18 2021 Water vapor shows western CONUS ridge building into the Plains, with next trof offshore the west coast.
Upper ridge will build in over the Panhandles tonight through Friday night which will allow for dry conditions along with mainly clear skies.
301 PM EDT Thu Mar 18 2021 A cold front continues to work south through southern Indiana and is expected to near the Ohio River between 5 to 6 PM EDT. By daybreak tomorrow, the cold front will near southern Tennessee.
A pair of low pressure troughs will move inland across Southern California on the weekend which will bring stronger onshore flow and cooler weather.
448 PM EDT Thu Mar 18 2021 MSAS analysis shows a 1033 mb high centered south of James Bay as part of a ridge that extends along an axis from James Bay to South Dakota. Satellite shows skies have cleared across the area accordingly as this ridge approaches. Upper-level heights will rise tonight and tomorrow as a stout ridge covering much of the CONUS from the Rockies into the Northern Plains inches eastward. This ridge will keep skies clear tonight and tomorrow.
310 PM CDT Thu Mar 18 2021 Scattered showers continue to move through the Mid-South this afternoon thanks to an upper level low pressure system.
Friday will be warmer than today with increased sun and lighter north winds, with highs reaching into the mid to upper 50s and some low 60s across the south.
While winds will begin light like last night, an area of low pressure will increasingly encroach from the west leading to an increase in southerly winds.
The cold front has made its way through the area, and temperatures have dropped steadily this morning behind the front. Expect temperatures to continue falling through the day as breezy westerly winds wrap around the south side of low pressure currently centered over the lower Ohio River region. Expect mid level cloud cover to increase through the day, as this low continues to track east. Despite a cooler, drier airmass, would not rule out a few showers this afternoon and evening as synoptic lift increases as an upper low moves over the area. Winds will subside some tonight as the upper level closed low moves eastward over the Central and Southern Appalachians. This should keep lows in the low to mid 40s. Low-level flow will be from the north on Friday with the low to the northeast and the high to the northwest.
While fair weather persists over the Northern Rockies today, a well-defined low pressure circulation is spinning off the coast of the Pacific Northwest. This system will send Pacific moisture up from the southwest and swing a cold front over the Northern Rockies by Friday morning. In the meantime, a southerly pressure gradient sets up over the region this afternoon, creating increased southerly winds by this evening ahead of Fridayâs cold front. Friday will bring overcast skies, valley rain, mountain snow, and a shift to westerly winds behind the cold front.
Cold front has surged east of the area and a drier west to northwest flow has been spreading over the area. Overnight lows cooler into the lower to mid 40s along and north of I-10. Cold front has surged east of the area with a west to northwest flow in place.
237 PM MDT Thu Mar 18 2021 High pressure aloft will keep dry and warm conditions in place through Friday. The warmth will be enhanced by increasing downslope winds off the western mountains/foothills ahead of an approaching cold front. A Cold front moves through the area Friday night as upper trough moves into the region. The high country will see a few inches of snow Friday night, but snow levels will remain above 6000 ft, so lower elevations should expect rain showers.
Issued by National Weather Service St Louis MO 319 PM CDT Thu Mar 18 2021 The deformation type precipitation associated with an upper level low moving eastward into western portions of KY and TN will shift east of our area by late tonight. It will be warmer on Friday due to the full solar insolation.
1135 AM MDT Thu Mar 18 2021 Quiet weather is expected for the short term period as a strong ridge of high pressure sets up over the Intermountain West. As of early this morning, the ridge axis was located over Utah and will slowly translate eastward as the day progresses. Satellite imagery currently depicts a mainly clear sky, but scattered mid and high level cloud cover can be seen spilling eastward over the ridge axis into eastern Utah and western Colorado.
Based on the potential for the ongoing southeasterly flow which will be recirculating some cooler air back into central Kansas will not stray far from the previous forecast with highs near 55 along an east of Highway 283. Over the weekend an upper level ridge will move east out into the Central Plains as the next upper level trough exits the eastern Pacific and begins to move across the western United States.
1005 AM MST Thu Mar 18 2021 Updated Aviation A warming trend will occur today into Friday with a return to above normal temperatures as high pressure builds across the region.
1143 AM CDT Thu Mar 18 2021 Current observations across the region reveal quiet conditions with temperatures hover at or just below freezing, as dry northerly winds continue to erode the stratus deck overhead. Shortly after daybreak, expect upper level ridging to gradually build in from the west, with winds forecast to become more northeasterly. Given the optimal conditions in place for radiational cooling, have overnight lows falling into the low to mid 20s. definitely a bit cooler than the past few nights. Expect much of the same in terms of quiet conditions and clear skies heading into the weekend, with southerly winds forecast to gradually ramp up as an upper level trough digs into the Rockies.
Late on Friday, a cold front pushes through the region. This will also be possible for any airfield located within the lower elevations of the Missouri River Valley east of GGW. Expected Flight Category: VFR Synopsis: High pressure and mostly pleasant flying conditions expected to continue through the day on Friday.
Still, that will be little consequence for us as UL ridging builds into the area.
/Issued 1024 AM CDT Thu Mar 18 2021/ A much cooler and mostly cloudy day is expected today in the wake of the storm system that brought some severe weather to the area yesterday. With this in mind, the forecast will lean toward the cooler CONSShort and NBM 25th ensemble probabilistic guidance. Light rain/snow showers continue to progress east this morning across far northeast Oklahoma and northwest Arkansas on the backside of exiting upper low.
/NEW/ /Through Friday Night/ High pressure will continue to build along the Front Range of the Rockies and West Texas over the next day or two as yesterday's low pressure system slowly advances east. The low should move far enough east tonight to allow the winds to finally weaken in speed through the overnight hours. This will allow temperatures to fall a few degrees cooler than this morning.
1024 AM CDT Thu Mar 18 2021 A much cooler and mostly cloudy day is expected today in the wake of the storm system that brought some severe weather to the area yesterday. With this in mind, the forecast will lean toward the cooler CONSShort and NBM 25th ensemble probabilistic guidance. Light rain/snow showers continue to progress east this morning across far northeast Oklahoma and northwest Arkansas on the backside of exiting upper low.
314 PM CDT Thu Mar 18 2021 This afternoon the upper level trough was moving over the Tennessee Valley while a ridge was located from the southwest into the northern Plains. The next upper low was over the northwest coast in the eastern Pacific. Winds will also decrease after sunset as the gradient weakens as high pressure builds in from the north.
SHORT TERM (Now through Friday Night): The very dry surface ridging in place over the RGV will hold down the humidity levels throughout the short term period.
Latest upper water vapor imagery was showing an impressive upper low over moving southeastward over the western Ohio River Valley at mid afternoon. Latest runs of the HREF/GFS/NAM all show that upper low will move off quickly to the east tonight. An upper ridge will build over the region Friday and Friday night bringing dry weather. Temperatures tonight will fall back below freezing late tonight as skies clear. Highs tomorrow will only be in the lower 50s despite the sunny skies because of persistent northeasterly winds. Britt Dry weather is expected to continue through the weekend as much of ensemble guidance is showing the upper ridge remains over the Midwest.
/Updated at 1216 PM CDT Thu Mar 18 2021/ An upper level low will pass to the northeast of the state through the afternoon. Cooler air will advect over the area causing temperatures to start falling a little faster this evening. though the low levels will keep plenty of moisture for a few light showers across the northern counties this afternoon through the night. Overcast skies will remain through the night because of this low level moisture. and with the higher winds speeds. an upper level trough will be positioned over the east coast with a high pressure over the Ohio Valley. Flow around this high and the trough to our east will cause flow to be from the northeast over the state.
1032 AM CDT Thu Mar 18 2021 A dreary day is occurring across the Mid-South as an upper level low pressure system is moving across the area. Showers continue to develop across the region in association with the upper level low. Some clearing has occurred behind the cold front late tonight but more clouds and some showers are possible again on throughout the day over our northern areas, as a strong upper low moves across the area. Temperatures right now are in the lower 60s with highs expected to be in the lower 50s today. High pressure will be moving into the region. With a clear sky, light winds, and cooler air will be briefly settling in.
245 PM CDT Thu Mar 18 2021 WV imagery shows potent upper trough over the MS Valley, making for a busy afternoon on the east coast. Farther west, a broad upper ridge dominated the western CONUS, and will build into West Texas and Southeast New Mexico over the next few days.
The lows will be in the 40s except for along the coast and along the Rio Grande each night.
The upper level low will continue to push off to the east through the rest of today. Upper level ridging will develop through Friday as it slides in off the Rockies, settling over the Great Plains region by the weekend.
Upper low currently over western KY will pull away to the east tonight reaching the east coast by morning, while high pressure at the surface and aloft builds in from the northwest. Temperatures should rise above normal over the weekend as high pressure slips east of Illinois allowing a light southerly wind component to develop.
259 PM CDT Thu Mar 18 2021 18Z surface data has a series of low pressure centers over the Ohio and Tennessee Valleys while high pressure was over the Plains. After sunset and continuing through Friday quiet and dry conditions will be seen across the area as high pressure builds into the Midwest.
/Issued 1258 PM CDT Thu Mar 18 2021/ /Through Friday Night/ High pressure will continue to build along the Front Range of the Rockies and West Texas over the next day or two as yesterday's low pressure system slowly advances east. The low should move far enough east tonight to allow the winds to finally weaken in speed through the overnight hours. This will allow temperatures to fall a few degrees cooler than this morning.
The surface flow remains north to northeast across the majority of the forecast area to the east of the ridge axis. Plenty of boundary layer moisture lingers across the area and the lower clouds have been tough to break. As the ridge axis shifts east of the area on Friday, southerly low-level flow will increase with the boundary layer drying substantially. As a result, the lower clouds will decrease, and with little in the way of mid and upper level moisture, there should be plenty of sunshine.
Models are indicating some mid and high level moisture moving in from the west later this afternoon into the evening, but this shouldn't impact the high temperatures too much as highs will be reached at peak sun angle prior to the increasing cloud cover. Overnight lows should also be a bit milder given the increasing cloud cover and warm air advection aloft as the flow turns to the southwest ahead of an approaching Pacific trough moving onto the Pacific Northwest coast by Friday. This will tighten the pressure gradient a bit across the west slope and nudge the ridge of high pressure slightly to our east. Some of the lower desert canyon country of southeast Utah could also see low 70s on Friday.
Otherwise, quieter and cooler weather will persist through tomorrow.
/issued 1032 AM CDT Thu Mar 18 2021/ A dreary day is occurring across the Mid-South as an upper level low pressure system is moving across the area. Showers continue to develop across the region in association with the upper level low. Some clearing has occurred behind the cold front late tonight but more clouds and some showers are possible again on throughout the day over our northern areas, as a strong upper low moves across the area. Temperatures right now are in the lower 60s with highs expected to be in the lower 50s today. High pressure will be moving into the region. With a clear sky, light winds, and cooler air will be briefly settling in.
High pressure will continue to build south into the area tonight as Ohio Valley low pressure quickly pivots to the Mid-Atlantic coast. Details: Skies will continue to clear the remainder of this afternoon, with clear skies expected tonight as center of high pressure reaches upper Michigan later tonight. In addition, placement of high pressure suggests at least some light northeast surface winds continuing tonight, especially for areas south of the big bridge.
Virga associated with warm air advection in advance of an approaching upper trough is moving through the Treasure Valley this morning, but no rain is expected. Temps will be 10-15 degrees above normal today, with a cold front moving in this evening in eastern Oregon and late overnight in SW ID.
247 PM CDT Thu Mar 18 2021 A ridge of high pressure at the surface will sink southward through the night allowing a weak southerly flow to develop west of Interstate 29. With southerly flow increasing on Friday temperatures will once again be warmer.
235 PM CDT Thu Mar 18 2021 Yesterday's storm system is now moving into the Ohio Valley area while a mid/upper ridge amplifies across the Central Great Basin area and the Northern Intermountain region. Northwest mid/upper flow prevails across the Central Plains as high pressure noses into the region. Light winds and seasonable temperatures are anticipated on Fri as high pressure noses into the area. Low level flow will return to the south across central KS as high pressure starts to pull away from the region.
Today and Tonight: Recent surface analysis and water vapor imagery noted a mature mid-latitude cyclone centered over the southeastern CONUS that is slowly loosening its influence on the local area. Generally clear skies are also in place with some spotty cumulus, allowing for our daytime temps to max out in the lower 50's this afternoon. Looking at the upper-level pattern, the central CONUS is in a transition pattern between building ridging to the west and departing troughing to the east. Clear skies will allow us to fall to temperatures in the mid-to-upper 20's, making for a cooler night that we've seen recently.
A cold front will push across the area by midnight bringing cooler and drier conditions for Friday.
150 PM CDT Thu Mar 18 2021 (Issued 150 PM CDT Thu Mar 18 2021) Tonight through Friday: Pressure gradient remains tight between the strong low to our southeast and the high pressure ridge building in from the northern Plains. A much calmer Friday is in the works as high pressure settles in.
On Friday, expect stratocu to continue to affect our eastern zones before gradually lifting out late in the day and into Friday night as the upper low to our NE finally ejects well east toward the mid Atlantic coast.
151 PM CDT Thu Mar 18 2021 Water Vapor and radar data shows closed low churning away along the MO/KY border with conveyor belt of rain/snow mix staying well south of the area from Chicago to east-central IA. Very dry inflow with the high on gusty northeast winds of 10-20 mph, gusting 25-35 mph. High pressure builds into over the area tonight through Friday for dry/mostly clear conditions. Plan on lows tonight in the teens across the boggy/cold areas of central WI, to the lower/mid 20s elsewhere. The high begins to slide east of the area Friday night, setting up southerly winds overnight in the 5-15 mph range.
141 PM MDT Thu Mar 18 2021 Latest upper air analysis shows a ridge over the Rockies spreading onto the High Plains. The closed low which brought widespread rainfall to the forecast area is continuing to move east over the Ohio River Valley. Lows will be a few degrees warmer than last night for the parts of the forecast area that had a clear sky due to the weak WAA from the southerly winds. Friday will be warmer than today as the upper level ridge moves overhead.
as much drier air will move across the Lower Great Lakes.
258 PM PDT Thu Mar 18 2021 A cold front will push through the region overnight.
The cold front has passed our northwestern SE GA counties and will continue to push across the rest of the area over the next few hours. A cold front will push across the area by midnight bringing cooler and drier conditions for Friday.
1002 PM EDT Thu Mar 18 2021 Low pressure moves southeast of the area tonight with windy conditions continuing into Friday. High pressure and dry conditions will be present for the weekend. Precip is ending as forcing and deeper moisture depart with low pressure. By Friday morning, winds will still be elevated despite the winds in the lower levels decreasing.
555 PM CDT Thu Mar 18 2021 A ridge of high pressure at the surface will sink southward through the night allowing a weak southerly flow to develop west of Interstate 29. With southerly flow increasing on Friday temperatures will once again be warmer.
The upper low is drifting east along the Tennessee border near the lakes as of 20Z, and has behaved itself to this point. The low will move out of the area by 00Z and surface boundary will slowly slip east and south through the region through the evening. We are expecting skies to clear by early Friday, but despite ample sunshine high temperatures will only reach the lower 50s. With dewpoints well into the 20s, clear skies, and only a light northeast wind Friday night a freeze would see like a good bet, but the consensus of guidance keeps most of the area right near freezing for lows.
Breezy, dry, and sunny conditions are expected to continue through the day today as high pressure to the east continues to be the main influence on our weather. This should continue through the day today and into tonight, as upper level ridging remains the main player in our local weather. SPC has put us in a general T'storm risk for tomorrow, and given some weak instability, there may be a few rumbles of thunder, especially over the higher terrain.
Surface analysis depicts a weak cold front extending from near Tampa Bay across the southeastern Gulf of Mexico to north of the Yucatan Peninsula. The 00Z Key West sounding shows a typical profile for March, with inversions based at 4500 and 10K feet, a very dry airmass above the lower inversion, and near normal PW of 1. Otherwise expect temperatures slowly dropping into the lower 70s, with light S/SW breezes. Expect similar conditions to continue overnight, ahead of an approaching cold front which remains on track to move through the Keys waters Friday morning. There will be an increased chance for periods of MVFR conditions beginning early Friday morning, as a weak cold front moves through the area.
/GG/ Much cooler weather has moved into the region behind yesterday's storm system and front. Even still, temperatures have climbed into the lower to mid 50s with some lower 60s in the south. Some light rain/drizzle was occurring across northern Mississippi down to the Golden Triangle this morning in association with the passing upper low. This will result in another cooler day tomorrow. Highs tomorrow will be in the low to mid 50s. Overnight lows will be in the 40s as clouds and winds should help keep conditions a little warmer despite the cold air advection. /28/ Expect dry weather and cooler than normal temperatures as we head into the weekend.
631 PM EDT Thu Mar 18 2021 MSAS analysis shows a 1033 mb high centered south of James Bay as part of a ridge that extends along an axis from James Bay to South Dakota. Satellite shows skies have cleared across the area accordingly as this ridge approaches. Upper-level heights will rise tonight and tomorrow as a stout ridge covering much of the CONUS from the Rockies into the Northern Plains inches eastward. This ridge will keep skies clear tonight and tomorrow.
/issued 310 PM CDT Thu Mar 18 2021/ Scattered showers continue to move through the Mid-South this afternoon thanks to an upper level low pressure system.
18Z surface data has a series of low pressure centers over the Ohio and Tennessee Valleys while high pressure was over the Plains. After sunset and continuing through Friday quiet and dry conditions will be seen across the area as high pressure builds into the Midwest.
402 PM CDT Thu Mar 18 2021 Much cooler weather has moved into the region behind yesterday's storm system and front. Even still, temperatures have climbed into the lower to mid 50s with some lower 60s in the south. Some light rain/drizzle was occurring across northern Mississippi down to the Golden Triangle this morning in association with the passing upper low. This will result in another cooler day tomorrow. Highs tomorrow will be in the low to mid 50s. Overnight lows will be in the 40s as clouds and winds should help keep conditions a little warmer despite the cold air advection. /28/ Expect dry weather and cooler than normal temperatures as we head into the weekend.
Upper level trof and front will slowly come ashore tonight with continued rain and high mountain snow.
829 PM EDT Thu Mar 18 2021 Line of strong thunderstorms continues to move through, out ahead of a cold front expected to move through the area overnight. (Valid 00Z) A line of convection will move across the TAF sites tonight ahead of cold front with breezy south to southwest winds at 15 to 20 knots this afternoon diminishing to around 10 knots and shifting to northwest overnight. MVFR/local IFR conditions will be possible in the convection, with some more areas of MVFR ceilings behind the cold front overnight. Scattered to numerous showers and a few thunderstorms along and ahead of a cold front will continue to move across the waters tonight, south of Tampa Bay. High pressure builds in over the waters through the upcoming weekend with a breezy north to northeast flow setting up.
1004 PM EDT Thu Mar 18 2021 Updated 955 PM EDT Thu Mar 18 2021 Upper low working its way east of Interstate 75, with the sfc reflection over West Virginia this evening. An elongated sfc trof extends westward into the lower Ohio Valley, with confluent and moist NE mid-level flow above it, and that is supporting a couple bands of light rain showers. A cold front continues to work south through southern Indiana and is expected to near the Ohio River between 5 to 6 PM EDT. By daybreak tomorrow, the cold front will near southern Tennessee.
With winds settling down and clear skies in place, overnight lows are expected to be cooler compared to this morning. Northerly winds around 10-15 mph will continue tomorrow, limiting our daytime highs to the lower to mid 60s in the afternoon.
High pressure tonight gives way to a Pacific front.
554 PM PDT Thu Mar 18 2021 A cold front will push through the region overnight.