Aikyam-Lab/Synoptic-Bench huggingface dataset:
134 PM EST Wed Dec 13 2023 A large area of high pressure over the Midwest will build slowly east toward the Central Appalachians by the week's end, supplying a string of fair and dry weather.
105 PM EST Wed Dec 13 2023 Dry high pressure will remain in place through late week with below normal temperatures expected each day. High pressure remains over the area today with some high clouds in place but otherwise mostly clear skies and generally light northeast winds. A reinforcing dry cold front pushes into the southeast tonight which will lead to increasing northeast winds in the boundary layer. Temperatures will continue to on the cooler side of normal as high pressure begins to move into the region behind the re-enforcing cold front.
1104 AM CST Wed Dec 13 2023 (Rest of Today) Dry weather will continue today into this evening as high pressure remains in place over the OH River Valley-- bringing northeasterly flow to our area.
Otherwise, very benign weather given a sprawling area of high pressure located across the Great Lakes and Ohio Valley. - Mild Weather will continue through the work week A strong upper level low will be moving through eastern Canada. While there will be a deepening upper level trough moving through the region with a strong gradient all instability will be aloft. Expect dry air and high pressure towards the surface. High pressure through the mid to low levels will stifle any clouds resulting in a mix of sun and clouds with a dry forecast.
208 PM EST Wed Dec 13 2023 High pressure will dominate through the first half of the weekend. A cold front will move offshore early this evening. High clouds near and east of the Blue Ridge will dissipate and temperatures will fall as high pressure builds in from the Midwest. Most models indicate the peak pressure in the ridge between 1039-1042mb. High pressure will build over the Mid-Atlantic and remain in place through the end of the work week.
At the surface, high pressure centered over the Ohio Valley area today will drift east to the Appalachian Mountains or even the Mid- Atlantic coast area by end of the day Thursday. Daytime highs both today and Thursday primarily in the lower 60s, with lows tonight ranging from the upper 30s and lower 40s well inland to the mid and upper 40s closer to the coast.
The upper level low that was previously sitting over Las Vegas will move eastward over New Mexico by tomorrow afternoon. As the upper level low moves towards our region, the isentropic lift will be complimented by increasing upper level forcing for ascent as jet level diffluence spreads over the region.
A slow moving area of low pressure will bring chances for rain and snow showers to mainly eastern Arizona this afternoon and through tonight.
320 PM EST Wed Dec 13 2023 Deep layer stability held within increasingly confluent mid level northwest flow atop building high pressure at the surface marking conditions late this afternoon. Eastward release of the main height fall center while low level flow backs with time will effectively shift the remnant low level thermal trough to the east this evening. Ridging will still offer some influence to the prospective low temperature forecast tonight, given the magnitude/depth of existing dry air, the open sky and limited gradient flow. Higher magnitude upper ridging anchored over the midwest today will ease into the region over the next 36 hours. Conditions governed by low to mid level ridging both Thursday and Thurs night lends to benign weather conditions under mostly clear skies.
This activity has been spurred on by a warm front that moved into the forecast area late last night. This is thanks to an expansive area of high pressure over the Ohio River Valley. Have kept the higher rain chances for the remainder of the day, as this stratiform may persist for a few more hours.
255 PM EST Wed Dec 13 2023 Upslope snow showers continue through tonight before high pressure brings warmer temperatures for the end of the week.
218 PM CST Wed Dec 13 2023 - Warmer than normal temperatures will continue through Thursday. Areas with snowpack will struggle to get above freezing.
Cloud cover will be thickest across eastern OK, as a nearly stationary upper level low is positioned west of the area.
(Tonight) As high pressure continues to dominate over the OH River Valley to our north, northeasterly flow continues over our area. Overnight lows are forecast to drop into the low to mid 30s.
This feature will have very limited moisture associated with it, so any precipitation will be mainly confined to the higher terrain of northwest Montana. This disturbance could cause enough turbulence for flurries or even freezing drizzle to fall out of the stagnant stratus cloud deck over northwest Montana.
A surface inversion remains firmly in place under high pressure aloft, with fog and low stratus covering much of the area this morning. Surface observations show greatly reduced visibilities and pockets of freezing fog across the Magic Valley, and a Dense Fog Advisory remains in effect for portions of the Western Magic Valley through the late morning.
Tomorrow may be a degree or two warmer than today, with high clouds continuing to drift over the region.
159 PM EST Wed Dec 13 2023 A large area of high pressure will remain in control over the region for the rest of the week. The next chance for precipitation will be over the weekend, when a low pressure system moves through the region. Mass subsidence will lead to clear skies and strong radiational cooling; therefore, have tweaked low temperatures slightly below guidance and expect overnight lows to drop into the low 20s, possibly even teens in spots. This, combined with ridging aloft, will begin the transition to a slight warm up for our area.
Huston With upper ridge building in, fog and stratus are the concerns for the next couple days. Opted for another Freezing Fog Advisory to capture the shifting nature of the dense fog. Should see some erosion of the low level moisture late morning, though some stratus could linger through the day.
1127 AM CST Wed Dec 13 2023 (Today through Thursday) An upper level low moves over Arizona today to over New Mexico on Thursday with a moist southwesterly flow aloft from off the Pacific.
1056 AM CST Wed Dec 13 2023 - High pressure will keep dry weather over the Quad State through the remainder of the workweek, with only a chance of showers returning this weekend. Through the remainder of the workweek, high pressure will slowly drift across the Midwest.
1122 AM CST Wed Dec 13 2023 - Mild temperatures today/Thu, but cooler over the snow pack - Fog potential is always there with warm daytime temperatures and melting snow.
202 PM CST Wed Dec 13 2023 - Light freezing rain/drizzle is expected to continue across west central Kansas and portions of southwest Kansas near the Colorado border through this evening. WV imagery indicates a closed upper low drifting slowly eastward across the Desert Southwest. Near the surface, a broad area of high pressure is edging east out of the Central Plains and through the Ohio River Valley. Based on radar/satellite trends and CAMs, periods of intermittent light to moderate rain are expected to prevail across much of southwest Kansas tonight and Thursday as a closed upper low shifts slowly east through the Desert Southwest, creating an increasingly difluent southwest flow aloft across the Western High Plains.
/NF/ Today and Tonight: After a rather chilly start this morning temperatures will warm above normal this afternoon and bottom out warmer than normal Thursday morning. Early morning satellite imagery/RAP analysis showed our CWA downstream of a closed low spinning over the desert southwest and south of a large closed low centered over eastern Canada. The resulting CAA into our CWA will be countered by induced mid level ridging as the closed low over the desert southwest shifts east to just south of the Four Corners region tonight. So, despite some CAA and less than full insolation, the rising heights should help temperatures top out in the lower 60s this afternoon. Tonight the same mid level ridging and high clouds should help hold most of the CWA in the lower 40s but upper 30s will be likely in our northeast.
147 PM MST Wed Dec 13 2023 Upper low, seen on water vapor imagery moving into the four- corners region, will move slowly E tonight and Thursday, while opening up into an elongated N-S trough. The northern portion of the trough will bring partly cloudy skies to areas E and S of KBIL on Thursday. Did increase wind speeds/gusts over gap areas and K6S0 above NBM values, due to a favorable pressure gradient with lee troughing tonight into Thu.
941 AM CST Wed Dec 13 2023 (Today through Thursday) An upper level low moves over Arizona today to over New Mexico on Thursday with a moist southwesterly flow aloft from off the Pacific.
1129 AM CST Wed Dec 13 2023 - A light wintry mix of freezing rain/freezing drizzle is possible tonight across southwestern Nebraska.
Low pressure near the Utah and Arizona border will bring light rain, and snow above roughly 6500 feet, to portions of southwest Utah Wednesday night into Thursday. High pressure will build into Utah late in the week, which will come with valley inversions.
447 PM CST Wed Dec 13 2023 Key Message: * No major forecast concerns through Thursday night High pressure will prevail as the dominant weather feature over the Great Lakes. As temperatures have warmed dew points have been able to mix down with many sites reporting values in the lower teens and single digits. Therefore, as temperatures cool, via radiational cooling, we should see lows in the low to mid-20s tonight with areas near the lake remaining in the upper 20s.
554 PM CST Wed Dec 13 2023 - Light freezing rain/drizzle is expected to continue across west central Kansas and portions of southwest Kansas near the Colorado border through this evening. WV imagery indicates a closed upper low drifting slowly eastward across the Desert Southwest. Near the surface, a broad area of high pressure is edging east out of the Central Plains and through the Ohio River Valley. Based on radar/satellite trends and CAMs, periods of intermittent light to moderate rain are expected to prevail across much of southwest Kansas tonight and Thursday as a closed upper low shifts slowly east through the Desert Southwest, creating an increasingly difluent southwest flow aloft across the Western High Plains.
908 PM EST Wed Dec 13 2023 Dry high pressure will remain in place through late week with below normal temperatures expected each day. The surface environment remains quite dry with dewpoints in the low to mid 30s. High pressure will continue to build east and south from the Ohio Valley pushing a weak and dry frontal boundary through the area. Resulting overnight lows will be warmer tonight as radiational cooling is disrupted both by the upper clouds and increasing northeast winds late tonight into early Thursday morning. Low temperatures in the low 30s north to upper 30s south and east. Temperatures will continue to on the cooler side of normal as high pressure begins to move into the region behind the re-enforcing cold front.
638 PM CST Wed Dec 13 2023 (This evening through Thursday Night) Upper ridge aloft this afternoon will continue to slide east through the period, giving way to the gradual influence of the upper trough present across the SW CONUS.
907 PM EST Wed Dec 13 2023 High pressure will dominate through the first half of the weekend. Behind an earlier cold frontal passage, the troposphere continues to dry with the 00Z upper air sounding depicting 0. Given a strong dome of high pressure (1038-1042 mb) building in from the Midwest, tonight will bring a period strong radiational cooling, particularly as the boundary layer decouples. Tonight's forecast lows range from the teens to low 20s in the cooler spots, to mid/upper 20s around D. High pressure will build over the Mid-Atlantic and remain in place through the end of the work week.
644 PM EST Wed Dec 13 2023 A large area of high pressure over the Midwest will build slowly east toward the Central Appalachians by the week's end, supplying a string of fair and dry weather.
930 PM EST Wed Dec 13 2023 Update Earlier cloudiness has mostly dissipated but now there is extensive cirrus spilling over the upper ridge and diving south from Upper Michigan. No impact weather concerns in the short term with high pressure in control for the most part at the surface. A sprawling area of high pressure will be situated in the short term from the Ohio Valley northward into the Great Lakes.
959 PM EST Wed Dec 13 2023 No major changes are needed to the forecast this evening as high pressure dominates the pattern across the region.
805 PM CST Wed Dec 13 2023 High pressure is centered over the Midwest this evening providing fair weather conditions across central Illinois. Temps are expected radiate efficiently tonight, falling into the lower to mid 20s.
Southern stream WSW winds aloft continue to bring mid to upper cloud cover over the region with moisture slowly increasing ahead of deep upper low in the Desert SW. Tight 10+mb gradient over the FL Peninsula this evening with a stalled frontal boundary thru the Bahamas, FL Straits then into the Yucatan Peninsula and a very strong high pressure center over the Ohio River Valley. NE winds will remain gusty tonight through Thursday as the gradient tighten in response to a slow developing W Gulf low pressure storm system.
652 PM EST Wed Dec 13 2023 Aviation No impact weather concerns in the short term with high pressure in control for the most part at the surface. A sprawling area of high pressure will be situated in the short term from the Ohio Valley northward into the Great Lakes.
630 PM EST Wed Dec 13 2023 Dry high pressure will remain in place through late week with below normal temperatures expected each day. High pressure remains over the area today with some high clouds in place but otherwise mostly clear skies and generally light northeast winds. A reinforcing dry cold front pushes into the southeast tonight which will lead to increasing northeast winds in the boundary layer. Temperatures will continue to on the cooler side of normal as high pressure begins to move into the region behind the re-enforcing cold front.
Breezy northerly winds are expected across the region today as a low pressure system moves out of the area. Ridging will build in as the low clears out, bringing warmer temperatures and calmer weather to the region through the weekend.
Expect a similar overnight period compared to last night with brief periods of low clouds and patchy light freezing fog, especially near and along the lower-lying river valley areas. An upper ridge in place over Montana today has provided for plenty of sunshine and near record high temperatures. A dry/weak cold front will move east across the area Thursday afternoon that should cool the area off some, but temps will still be well above normal.
In the short-term, things remain benign with upper-level troughing continuing to slide into the southwest and ridging moving over much of the state. Afternoon highs will be in the low to mid 60s in the Valley with 50s and 40s in the foothills and mountains, respectively.
Morning snow in the lower elevations of southwest Colorado this morning has given way to rain showers as temperatures rose into upper 30s and 40s.
Deep layer stability held within increasingly confluent mid level northwest flow atop building high pressure at the surface marking conditions late this afternoon. Eastward release of the main height fall center while low level flow backs with time will effectively shift the remnant low level thermal trough to the east this evening. Ridging will still offer some influence to the prospective low temperature forecast tonight, given the magnitude/depth of existing dry air, the open sky and limited gradient flow. Higher magnitude upper ridging anchored over the midwest today will ease into the region over the next 36 hours. Conditions governed by low to mid level ridging both Thursday and Thurs night lends to benign weather conditions under mostly clear skies.
622 PM CST Wed Dec 13 2023 - Warmer than normal temperatures will continue through Thursday. Areas with snowpack will struggle to get above freezing.
Warmer temperatures and breezy east winds return for this weekend. A low pressure center, located over central Arizona, will continue to move downstream tonight and exiting the region by Thursday afternoon. As the low pressure center moves out later tomorrow, temperatures will be near to slightly above normal.
/NEW/ /Through Thursday Evening/ An upper low over the Desert Southwest will work its way east across Arizona tonight, continue moving east across New Mexico Thursday, before arriving near the New Mexico/Texas border Thursday evening. Light precipitation out ahead of the low has had difficulty overcoming the dry airmass in place across North and Central Texas, causing water droplets to evaporate before reaching the ground in most cases today. Afterwards, persistent dry east flow at the low levels will confine precipitation to the Big Country and areas west for the overnight hours into Thursday, keeping North and Central Texas cool and dry. Overnight temperatures will be slightly above normal in the lower and mid 40s due to the presence of mid and high clouds, with daytime temperatures both today and Thursday being close to normal for this time of year.
With the ridge moving east, a slow moving front will arrive late tonight into early Thursday morning.
The next upper level low will be moving into the southwest U.
Thursday and Thursday night will be defined by continued upper subsidence over low level warm advection with a building ridge.
511 PM CST Wed Dec 13 2023 (Tonight) As high pressure continues to dominate over the OH River Valley to our north, northeasterly flow continues over our area. Overnight lows are forecast to drop into the low to mid 30s.
Near and north of the Tennessee River, where cloud cover has been more predominant and winds have stayed closer to 4 or 5 mph this evening, temperatures are warmer. In those locations, temperatures have only dropped into the lower 40s to around 50 degrees. Cloud cover and winds will likely keep temperatures as you wake up from falling below the lower 30s to upper 30s.
324 PM MST Wed Dec 13 2023 - Freezing fog continues across the south Laramie Range this afternoon and is expected to spread farther eastward along the Interstate-80 corridor overnight. While clearing has occurred across much of the CWA this afternoon, low stratus continues to plague central Laramie County and dense freezing fog persists across the south Laramie Range. Expanded the Freezing Fog Advisory for the south Laramie Range through the evening as Hi-Res guidance shows it sticking around at least through 8 PM. Hi-Res guidance mainly shows snow between Cheyenne and Sidney, with the higher confidence of snowfall being in and around Sidney. Cannot rule out the potential for some freezing drizzle in Cheyenne County as the saturated layer just above the surface will be just below freezing. In addition to snow, more widespread freezing fog could occur (60% chance) overnight.
The 19Z MSAS surface analysis showed high pressure that stretched from the central Plains through northern IL into western OH. Tranquil conditions will continue tonight as the high pressure moves toward/into the OH River Valley. Meanwhile, an upper-level ridge moves into the Upper Midwest. The upper ridge moves into the western Great Lakes region on Thursday, thus plenty of sunshine is anticipated. There will be a tight pressure gradient over the region between the retreating high pressure and a strong area of low pressure over Hudson Bay. Modest WAA and lack of snow cover should allow max temperatures to jump up into the lower to middle 40s.
758 PM CST Wed Dec 13 2023 Key Message: * No major forecast concerns through Thursday night High pressure will prevail as the dominant weather feature over the Great Lakes. As temperatures have warmed dew points have been able to mix down with many sites reporting values in the lower teens and single digits. Therefore, as temperatures cool, via radiational cooling, we should see lows in the low to mid-20s tonight with areas near the lake remaining in the upper 20s.
Nearly zonal flow today will shift as low amplitude ridge becomes the prominent feature.
631 PM EST Wed Dec 13 2023 A large area of high pressure will remain in control over the region for the rest of the week. The next chance for precipitation will be over the weekend, when a low pressure system moves through the region. Mass subsidence will lead to clear skies and strong radiational cooling; therefore, have tweaked low temperatures slightly below guidance and expect overnight lows to drop into the low 20s, possibly even teens in spots. This, combined with ridging aloft, will begin the transition to a slight warm up for our area.
414 PM MST Wed Dec 13 2023 - Freezing fog continues across the south Laramie Range this afternoon and is expected to spread farther eastward along the Interstate-80 corridor overnight. While clearing has occurred across much of the CWA this afternoon, low stratus continues to plague central Laramie County and dense freezing fog persists across the south Laramie Range. Expanded the Freezing Fog Advisory for the south Laramie Range through the evening as Hi-Res guidance shows it sticking around at least through 8 PM. Hi-Res guidance mainly shows snow between Cheyenne and Sidney, with the higher confidence of snowfall being in and around Sidney. Cannot rule out the potential for some freezing drizzle in Cheyenne County as the saturated layer just above the surface will be just below freezing. In addition to snow, more widespread freezing fog could occur (60% chance) overnight.
Locally breezy winds are expected tonight as a low pressure system moves away from the area. Ridging will build in as the low clears out, bringing warmer temperatures and calmer weather to the region through the weekend. The area sits in the sweet spot between a low pressure system exiting to our east and a high pressure ridge to our west.
327 AM EST Thu Dec 14 2023 High pressure builds into the region today with clearing skies. Quiet weather will persist through the weekend, with dry conditions and warmer temperatures. 325 AM Update: High pressure moves into the region today, which will result in mostly sunny skies and seasonable temperatures. Mostly clear skies and seasonable temperatures are expected tonight with high pressure remaining in control.
A slow moving area of low pressure will bring chances for rain and snow showers to mainly eastern Arizona overnight and into Thursday.
Warmer temperatures and breezy east winds return for this weekend as a ridge builds in the region. The low pressure center that brought near normal temperatures to the area continues to exit the region to the east. Behind this system is a developing ridge that will influence a warming period beginning today that will continue into the weekend.
There appears to be little change in the pattern for much of the period as ridging holds over the area for much of the forecast period.
Water vapor/RAP & evening synoptic upper air analysis indicate mid-level ridging over the Gulf Coast states while upper cold core low is centered over the Southwest/Four Corners area. Tomorrow may be a degree or two warmer than today, with high clouds continuing to drift over the region.
Rain and snow showers will be possible over eastern Arizona today, before warmer and dry conditions set in through the weekend. Remnant moisture combined with orographic forcing on the backside of the low will keep some lingering rain and snow showers through the morning mainly near the Four Corners. For the remainder of northern Arizona, dry and cool conditions are expected behind the low today.
346 AM EST Thu Dec 14 2023 High pressure builds into the region today with clearing skies. Quiet weather will persist through the weekend, with dry conditions and warmer temperatures. 325 AM Update: High pressure moves into the region today, which will result in mostly sunny skies and seasonable temperatures. Mostly clear skies and seasonable temperatures are expected tonight with high pressure remaining in control.