Aikyam-Lab/Synoptic-Bench huggingface dataset:
1029 PM CST Fri Jan 27 2023 A weak cold front will sink south into northern portions of the forecast area tonight, then stall out just north of the I-70 corridor. By Saturday afternoon, precipitation chances will be on the increase as a cold front begins to move through the region. Moisture will be rather limited and latest forecast soundings indicate that the dendritic growth zone will remain unsaturated for most locations, thus the light rain will transition to a mix of light freezing rain/drizzle as colder air filters in Saturday night.
Southern Indiana and far northern KY counties will stay in the low to mid 50s. As this occurs, the low level jet core will respond and translate eastward into our region through the night.
251 AM CST Sat Jan 28 2023 A strong cold front is expected to come sweeping down the Plains today with very cold Arctic air filtering in behind it. For portions of south-central and southeast Kansas out ahead of the front highs will reach the mid 50s to perhaps the low 60s. Timing of the front could vastly change the high temperature that is expected.
1045 PM CST Fri Jan 27 2023 (Rest of tonight) Seasonably strong west-northwest flow aloft will continue across the region overnight, in the wake of a sheared mid-level longwave trough that crossed the region earlier this morning. Although not explicitly noted in the grids, conditions may become favorable for the development of patchy/light freezing fog in the sheltered valleys of northeast AL/southern TN.
120 AM EST Sat Jan 28 2023 High pressure will remain in control of the region through today with seasonable temperatures.
A relatively warmer night is in store with temps actually rising late, especially in the FL Counties, as warm air advection gets underway. Temps will bottom out in the low- 40s to low-50s.
251 AM CST Sat Jan 28 2023 Key messages: - A winter storm will continue to impact north central Nebraska overnight into this afternoon with the highest amounts of 6 to 12 inches possible near and north of a line from Sparks through Bassett and Ewing.
As the high moves more to the northeast, the flow will become increasingly onshore.
High pressure stretched from the Northern Plains and Canadian Prairies into the Mid-Mississippi River Valley. An area of low pressure was over the Nebraska Panhandle. This low will track eastward today across the Missouri Valley and into the Mississippi Valley tonight, bringing snow showers to those areas. High pressure will remain in control across the Northland with northwesterly winds funneling Arctic air into the region.
Guidance indicates a steady increase in 1000-950 mb thetaE overnight by 6-7K by Saturday morning as the thin, highly modified continental air layer becomes more influenced by the nearby warmer Straits. From synopsis, a stationary front will remain over the Straits of Florida with high pressure centered over the Gulf Coast. Breezes will begin to slacken by the end of the weekend, as high pressure slides northeastward off the Mid- Atlantic coastline.
332 AM EST Sat Jan 28 2023 High pressure will prevail today.
1210 AM EST Sat Jan 28 2023 Dry high pressure will persist over the region tonight through Saturday.
1053 PM CST Fri Jan 27 2023 Key Messages: - Warmer temperatures today and Saturday with afternoon highs in the 40s and 50s.
1120 PM CST Fri Jan 27 2023 GOES-16 Satellite trends and 00Z upper air analysis shows a broad upper level trough axis extending across much of the Continental United States with mid-level flow nearly zonal across the Lower Mississippi Valley. Latest short term model guidance including the 00Z NAM and Convective Allowing Models indicate the potential for showers should hold off until around mid-afternoon on Saturday when a slow moving cold front begins to move towards western sections of the Middle and Lower Mississippi Valleys.
631 AM EST Sat Jan 28 2023 (Today through Sunday) High pressure begins to shift eastward towards the western Atlantic. Temperatures will be a few degrees higher than yesterday in the low to mid 70s as the warming trend begins.
520 AM CST Sat Jan 28 2023 (Today and tonight) The CWA remains beneath the southern periphery of a full-latitude trough positioned across the U. Temperatures will trend a few degrees warmer today compared to yesterday from increasing adiabatic compression as the weak surface cyclone drifts southward into the Texas Panhandle, and the presence of high-level cirrus bands associated with a strengthening 300 mb jet streak should not impede diabatic heating effects. A weak vorticity lobe will rotate eastward over the TX/OK PH region tonight, with the attendant cold front propagating southward into the CWA and shifting winds to the north, resulting in cooler temperatures heading into Sunday morning.
342 AM CST Sat Jan 28 2023 Forecast Highlights: -A cold front brings an arctic air mass into the area later today and tonight.
Southern Indiana and far northern KY counties will stay in the low to mid 50s. As this occurs, the low level jet core will respond and translate eastward into our region through the night. Sunday, a cold front will bring rain to the region as it moves from west to east. This will begin advecting cooler air into our northern CWA, which will set up a tight temperature gradient from southern IN into southern KY.
This will be ahead of a cold front approaching from the northwest. Cooler/drier air will be noted, and falling temperatures are expected.
Forecast Highlights: -A cold front brings an arctic air mass into the area later today and tonight.
Quiet and mild weather today with warmer temperatures. Discussion: Southerly flow increases today as 500 MB upper trough over the Rockies moves into the Plains states. Lower pressure develops out ahead of the trough over the southern plains by this afternoon. Showers will then develop over Arkansas and Louisiana and spread quickly northeast across the lower Mississippi and lower Tennessee Valleys by this evening. Discussion: We begin the extended in quasi-zonal flow aloft and upper ridging across the Eastern GoM eastward through the Bahamas.
High pressure stretched from the Northern Plains and Canadian Prairies into the Mid-Mississippi River Valley. An area of low pressure was over the Nebraska Panhandle. This low will track eastward today across the Missouri Valley and into the Mississippi Valley tonight, bringing snow showers to those areas. High pressure will remain in control across the Northland with northwesterly winds funneling Arctic air into the region. High pressure will remain over the region for much of the upcoming week with no significant chances for snowfall currently expected.
536 AM CST Sat Jan 28 2023 (Today and tonight) A 500mb trough across the western United States this morning will broaden somewhat across the western and central U. Some of this moisture will move into the southern and eastern portions of the CWA late tonight into early Sunday morning as a cold front approaches the northern portions of the CWA late tonight and moves into the Big Country region early Sunday morning. Temperatures tonight will fall into the 40s after midnight tonight before the shallow cold airmass associated with the cold front reaches the northern portions of the CWA Sun morning.
An upper ridge is maintaining a position off in the eastern Pacific while a longwave trough is east of the area. An upper level low pressure system in the flow will dive to the south later this evening and Sunday. The upper low pressure system is expected to move to the south and slow down and pivot eastward across middle to southern California. Temperatures will be cooler Sunday as a cold front marches south.
516 AM CST Sat Jan 28 2023 A strong cold front is expected to come sweeping down the Plains today with very cold Arctic air filtering in behind it. For portions of south-central and southeast Kansas out ahead of the front highs will reach the mid 50s to perhaps the low 60s. Timing of the front could vastly change the high temperature that is expected. Along with the cold there will be a chance for freezing drizzle and drizzle for south-central and southeast Kansas this evening into Sunday morning.
Cold front is expected to enter northwest Oklahoma late this afternoon and push south through the area Saturday night. Are some hints in the models as cold air deepens behind the front that lower levels try to saturate leading to some potential for freezing drizzle Sunday morning across parts of the area.
A weak area of low pressure will move from Lake Erie to Northern Maine Sunday into Sunday Night. This storm track to help to draw mild air into Pennsylvania through the weekend with daytime temperatures 5 to 10 degrees above normal and departures from normal at night between 14 and 18 deg F warmer than normal. The relatively deep dry air beneath this cloud base and low to mid level thermal ridging overhead will minimize the chance for snow/rain showers. A weak area of low pressure will track north of PA late tonight into Sunday, bringing mainly cloudy and mild conditions with scattered rain showers.
532 AM CST Sat Jan 28 2023 (Today through Sunday) Dry conditions will continue through afternoon hours today due to surface ridging influences.
904 AM EST Sat Jan 28 2023 Tranquil weather conditions are expected today with high pressure maintaining control as it shifts northeastward. Temperatures have warmed above the freezing mark and the Freeze Warning and Frost Advisory were allowed to expire. Broken stream of cirrus aloft will continue to spill atop an upper ridge resulting in partly cloudy skies at times. Afternoon highs will read 3- 6 degrees higher than yesterday, generally in the low/mid 60s in SE GA and mid/upper 60s in NE FL. As the high moves more to the northeast, the flow will become increasingly onshore.
Northwesterly flow aloft descending along the east side of a high amplitude ridge off the West Coast is bringing moisture into the Northern Rockies this morning. In the meantime, an arctic cold front is moving into western Montana from the northeast, bringing colder temperatures and strong northeast or easterly winds. Behind the arctic cold front, temperatures will drop noticeably on Saturday night. For now, expect overnight lows on Sunday morning to be sub-zero across the Northern Rockies with the exception of the lower elevations in western Idaho County. Traditionally colder valleys in southwest Montana, the Upper Blackfoot Valley, and the North Fork Flathead will be even colder, seeing low temperatures down to 10 or 20 below zero and highs in the low single digits on Sunday.
With the mild airmass advecting in from the south, temperatures will surge into the upper 40s for locations south of the front, while locations to the north struggle to reach the freezing mark. As low pressure develops and moves along the surface boundary this evening, the position of the front will begin to align more with the Interstate 55 corridor. And, as low pressure departs later tonight, we should begin to see a more steady progression of the front across central Illinois. A mix of flurries and freezing drizzle will linger into early Sunday morning in locations east of Interstate 55, gradually tapering off as drier air moves in from the west. Some models then suggest a shot of light snow late Sunday evening as a band of frontogenesis develops behind the departing cold front.
Key Messages: * Brief, light freezing drizzle followed by light snow late this morning into the afternoon. * Gusty north wind and much colder air arrives behind cold front today. Details: The radar has cleared out for now, but near-term models continue to show a brief burst of snow moving back in from the northwest by 9-10am this morning behind the cold front (which has slowed down slightly). With limited moisture aloft, this may initially fall as some freezing drizzle.
(Today through Sunday) Dry conditions will continue through afternoon hours today due to surface ridging influences.
Earlier this morning we observed a significant difference in temperatures between far coastal and inland areas as the maritime influence warmed the east coast regions into the 70s fairly quickly while interior and western suburbs remained in the low 60s. Lack of a break in the clouds overnight kept us a bit warmer than originally forecast and highs this afternoon will be significantly higher than yesterday as we begin a warming trend. (Today through Sunday) High pressure begins to shift eastward towards the western Atlantic. Temperatures will be a few degrees higher than yesterday in the low to mid 70s as the warming trend begins.
(Today and tonight) A 500mb trough across the western United States this morning will broaden somewhat across the western and central U. Some of this moisture will move into the southern and eastern portions of the CWA late tonight into early Sunday morning as a cold front approaches the northern portions of the CWA late tonight and moves into the Big Country region early Sunday morning. Temperatures tonight will fall into the 40s after midnight tonight before the shallow cold airmass associated with the cold front reaches the northern portions of the CWA Sun morning.
(Today through Sunday afternoon) Current satellite shows some low clouds moving up along the lower Trans Pecos into the SE Permian Basin, although these should dissipate by late morning. We'll warm efficiently this afternoon to the 60s with increasing southwesterly flow in response to lee troughing. All attention shifts to a cold front set to push through the area late Saturday/early Sunday.
437 AM CST Sat Jan 28 2023 Key Messages: * Brief, light freezing drizzle followed by light snow late this morning into the afternoon. * Gusty north wind and much colder air arrives behind cold front today. Details: The radar has cleared out for now, but near-term models continue to show a brief burst of snow moving back in from the northwest by 9-10am this morning behind the cold front (which has slowed down slightly). With limited moisture aloft, this may initially fall as some freezing drizzle.
516 AM CST Sat Jan 28 2023 (Today through Sunday afternoon) Current satellite shows some low clouds moving up along the lower Trans Pecos into the SE Permian Basin, although these should dissipate by late morning. We'll warm efficiently this afternoon to the 60s with increasing southwesterly flow in response to lee troughing. All attention shifts to a cold front set to push through the area late Saturday/early Sunday.
255 AM MST Sat Jan 28 2023 Current surface analysis shows arctic boundary now just south of the forecast area, with low pressure along it across central NE. Temps range from mostly teens across northwest SD to the low to mid 20s across northeast WY and southwest SD. Additional snowfall amounts through this afternoon across the advisory area will mostly be in the 1 to 4 inch range, with the higher amounts generally across northeast WY to the Black Hills and far southwest SD where locally higher amounts are possible. The coldest air will be in place for Sunday night as skies finally start to clear out and high pressure settles over the area.
(Today through Sunday) This AM at the surface, surface ridging remains in place to start the forecast.
522 AM CST Sat Jan 28 2023 (Today through Sunday) This AM at the surface, surface ridging remains in place to start the forecast.
Temperatures will prevail near normal today, while the arrival of an Arctic cold front will result in colder temperatures Sunday night.
Winds around 10 kts will veer today as high pressure over north Florida/ south Georgia moves northeastward.
Key messages: - A winter storm will continue to impact north central Nebraska overnight into this afternoon with the highest amounts of 6 to 12 inches possible near and north of a line from Sparks through Bassett and Ewing.
430 AM MST Sat Jan 28 2023 Current surface analysis shows arctic boundary now just south of the forecast area, with low pressure along it across central NE. Temps range from mostly teens across northwest SD to the low to mid 20s across northeast WY and southwest SD. Additional snowfall amounts through this afternoon across the advisory area will mostly be in the 1 to 4 inch range, with the higher amounts generally across northeast WY to the Black Hills and far southwest SD where locally higher amounts are possible. The coldest air will be in place for Sunday night as skies finally start to clear out and high pressure settles over the area.
534 AM CST Sat Jan 28 2023 (Today through Sunday) Mid-level ridge begins to build over the eastern Gulf of Mexico causing our pressure gradient to tighten. On Sunday, a surface level inverted trough is forecast to move north and pass by just southeast of the CWA. Highs are forecast to be in the lower 80s.
(Today) Early morning temperatures have dropped to the upper 20s to lower 30s across the area as high pressure sits to our southeast and our next weather maker begins to form over the Central Plains. Warm air advection will increase today as southerly flow increases ahead of a cold front that will begin to shape up over the ArkLaTex region later today.
539 AM CST Sat Jan 28 2023 (Today) Early morning temperatures have dropped to the upper 20s to lower 30s across the area as high pressure sits to our southeast and our next weather maker begins to form over the Central Plains. Warm air advection will increase today as southerly flow increases ahead of a cold front that will begin to shape up over the ArkLaTex region later today.
643 AM EST Sat Jan 28 2023 High pressure will prevail today.
1154 AM CST Sat Jan 28 2023 (Today and tonight) A 500mb trough across the western United States this morning will broaden somewhat across the western and central U. Some of this moisture will move into the southern and eastern portions of the CWA late tonight into early Sunday morning as a cold front approaches the northern portions of the CWA late tonight and moves into the Big Country region early Sunday morning. Temperatures tonight will fall into the 40s after midnight tonight before the shallow cold airmass associated with the cold front reaches the northern portions of the CWA Sun morning.
18z surface analysis shows high pressure centered just off the South Carolina coast line as it continues to lift northeastward into the Atlantic. Onshore flow will keep coastal areas slightly cooler with highs in the upper 70s. Inland locations will be in the low 80s.
1227 PM CST Sat Jan 28 2023 A strong cold front is expected to come sweeping down the Plains today with very cold Arctic air filtering in behind it. For portions of south-central and southeast Kansas out ahead of the front highs will reach the mid 50s to perhaps the low 60s. Timing of the front could vastly change the high temperature that is expected. Along with the cold there will be a chance for freezing drizzle and drizzle for south-central and southeast Kansas this evening into Sunday morning.
COLDER END OF THE WEEKEND: Tonight, precipitation shunts east as the trough axis and jet streak progress downstream.
1237 PM EST Sat Jan 28 2023 High pressure will prevail today.
Snow showers associated with an upper trough have developed this morning over portions of SE Oregon and SW Idaho. Snow will become widespread from 6z-12z/Sun as a cold front moves through.
An Arctic cold front will move south through the area during the day with cold air continuing to pour into the area tonight.
Current surface analysis shows arctic boundary now just south of the forecast area, with low pressure along it across central NE. Temps range from mostly teens across northwest SD to the low to mid 20s across northeast WY and southwest SD. Additional snowfall amounts through this afternoon across the advisory area will mostly be in the 1 to 4 inch range, with the higher amounts generally across northeast WY to the Black Hills and far southwest SD where locally higher amounts are possible. The coldest air will be in place for Sunday night as skies finally start to clear out and high pressure settles over the area.
1028 AM MST Sat Jan 28 2023 Current surface analysis shows arctic boundary now just south of the forecast area, with low pressure along it across central NE. Temps range from mostly teens across northwest SD to the low to mid 20s across northeast WY and southwest SD. Additional snowfall amounts through this afternoon across the advisory area will mostly be in the 1 to 4 inch range, with the higher amounts generally across northeast WY to the Black Hills and far southwest SD where locally higher amounts are possible. The coldest air will be in place for Sunday night as skies finally start to clear out and high pressure settles over the area.
1117 AM CST Sat Jan 28 2023 (Today through Sunday afternoon) Current satellite shows some low clouds moving up along the lower Trans Pecos into the SE Permian Basin, although these should dissipate by late morning. We'll warm efficiently this afternoon to the 60s with increasing southwesterly flow in response to lee troughing. All attention shifts to a cold front set to push through the area late Saturday/early Sunday.
247 PM EST Sat Jan 28 2023 High pressure accompanied by dry conditions and seasonable temperatures will prevail through much of Sunday.
The boundary that was previously draped over the Upper Keys has moved all the way through the Lower Keys.
1153 AM CST Sat Jan 28 2023 (Rest of Today) High pressure situated along the SE coast controlled the area's weather, providing a light SE flow over the Tennessee Valley. Mid morning temperatures have risen mostly into the low/mid 40s.
Waves of low pressure rippling along the stalled front will help to generate some mixed rain and snow for the second half of the weekend in the process. the aforementioned sfc front will stall over our forecast area as several low pressure waves will ripple along it.
With some sun breaking through an expanding cloud deck, 2 PM temps across the Tennessee Valley have warmed into the mid 50s to the lower 60s. Temperatures towards sun morning should cool into the low/mid 40s.
As a result, went ahead an issued an SPS through 2 PM for slippery road conditions in areas of freezing drizzle. Later in the afternoon surface temperatures should be low enough that flurries or light snow should replace the freezing drizzle across the entire forecast area. Key Messages: * Brief, light freezing drizzle followed by light snow late this morning into the afternoon. * Gusty north wind and much colder air arrives behind cold front today. Details: The radar has cleared out for now, but near-term models continue to show a brief burst of snow moving back in from the northwest by 9-10am this morning behind the cold front (which has slowed down slightly). With limited moisture aloft, this may initially fall as some freezing drizzle.
(Rest of Today) High pressure situated along the SE coast controlled the area's weather, providing a light SE flow over the Tennessee Valley. Mid morning temperatures have risen mostly into the low/mid 40s.
As it does so, it will usher a surface cold front through the forecast area from northeast to southwest late tonight into Sunday morning.
351 PM EST Sat Jan 28 2023 A warm front will lift north of the area this evening. Low pressure will track from the mid Mississippi Valley into the eastern Great Lakes Sunday into Sunday night which will drag a cold front across the area. High pressure will gradually build in through the early part of the week. Showers will diminish in the morning, lingering longest in the southeastern counties, as the low level jet moves off to the east and weakens. However, some additional showers will develop in the afternoon in advance of a cold front making it into the area. Temperatures are forecast to be mild once again on Sunday, although a few degrees cooler than today. High pressure does build over the region throughout the afternoon, with drier air moving in from the northwest.
146 PM EST Sat Jan 28 2023 High pressure will maintain dry conditions and above- normal temperature today. Widespread light rain returns Sunday as low pressure tracks to our northwest.