Aikyam-Lab/Synoptic-Bench huggingface dataset:
659 AM EDT FRI JUL 22 2016 A strong high pressure system centered off the mid Atlantic coast will continue to cause a southerly flow of hot and humid air across our area today. A weak cold front will move south across lower Michigan today and into northern portions of Indiana and Ohio tonight, possibly causing scattered thunderstorms in our area. Highs today will be in the lower 90s, which combined with the high humidity, will result in heat index readings over 100 across much of the area. Temps should be a few degrees warmer than yday with more aftn sunshine.
VFR conditions will prevail as strong upper level ridge of high pressure remains dominant.
137 AM EDT FRI JUL 22 2016 High pressure builds offshore today. A cold front approaches tonight and moves through early Saturday.
1239 AM CDT FRI JUL 22 2016 A weak cold front is located across northwest Wisconsin at mid afternoon, and continuing to sag slowly southeastward. As this weak front continues to progress southeastward, the low chances of additional thunderstorms will continue to drop, and the higher dewpoint air will also finally be temporarily shunted off to the south of the DLH CWA. Weak high pressure will then be in control tonight and Friday across the Northland. High pressure will keep the Northland clear and dry Friday night, but there could be another round of severe weather Saturday and Saturday night.
326 AM MDT FRI JUL 22 2016 The arrival of low pressure to the left coast of central NOAM will signal a change in the pattern across the west beginning today. The Pacific NW upper Low ejects through the northern Rockies while the subtropical High also expands across the southern tier of states into the SE Pacific. Near term models suggest the highest probability of storm development over southwest Colorado into the central mountains.
The ongoing snow on radar is mostly aloft except near Pine Ridge where a dusting or less is suggested by highway cams. dry air at the lower levels is preventing the snow from reaching the ground as anything much more than flurries. The models continue to show a strong cold front moving through 09z- 12z tonight. Dry weather will continue into Tuesday as a low pressure system develops east of the region.
Its a little warm this morning there so some of the lower elevations may have trouble seeing efficient snow accumulations for a while. On Tuesday as the upper trough moves in yet another surge of arctic air will move south across the area.
/issued 359 AM CST Mon Jan 9 2017/ (Today and Tonight) Lee trough along the Texas and New Mexico state line will continue to bring breezy conditions today, particularly for the Big Country and Concho Valley. Gusty south winds will continue tonight, keeping lows well in the 40s, with even warmer temperatures in the lower 50s in the Big Country. In general, a deep trough will develop over the Southwest US and eventually tries to close off.
626 AM EST Mon Jan 9 2017 Arctic High pressure across the region will keep cold and dry air over the region through early Tuesday then begin retreating eastward. Upper trough along the coast will continue to push east today with northeasterly flow aloft continuing across the region. Temperatures are forecast a few degrees warmer than the past couple of days with the Arctic airmass begins to slowly modify, although still around 15 degrees below climatology. Highs on Tuesday climbing into the upper 40s to lower 50s on the backside of the high. Models do show some low-level moisture advecting inland across eastern portions of the Carolinas from a weak coastal trough along the South Carolina coast during the day Tuesday.
633 AM EST Mon Jan 9 2017 Dry and warmer conditions are expected today highs in the upper 20s to near 30 degrees.
Dry conditions will prevail through this period as northwesterly flow continues at upper levels on the southwestern flank of the trough departing our area. At the surface, a high pressure center will remain entrenched over the mid-Atlantic, with the ridge axis stretching southwestward into our area.
High temperatures today will mainly be the low to mid 70s under a mix of sun and clouds. Warmer temperatures can be expected on Tuesday with highs across much of the area in the low to mid 80s. Additionally, the warm and moist winds from the south and southeast will pass over the much cooler nearshore waters which may produce periods of dense sea fog along the coast.
though still plenty chilly with most locations dipping into the lower 20s. ahead of a cold front forecast to move into the OH and Mid MS valleys. As ridge builds in through Thu.
presumably a weak cold front. will move across the forecast area Tuesday with only slightly cooler conditions and winds becoming west to northwest.
Warmer temperatures with valley rain and high elevation snow through today except for some patchy freezing rain in far southeast Elko County. Cooler tonight into mid-week with snow levels lowering back to valley floors.
/issued 332 AM CST Mon Jan 9 2017/ High pressure has finally slid off to the east and is now centered along the Atlantic Coast.
In fact where we have seen the strongest downsloping winds afternoon temperatures have already soared into the lower and middle 60s across the western South Plains as of 20Z. However a passing progressive upper ridge will join forces with breezy downsloping winds CWA-wide Monday afternoon.
656 AM PST Mon Jan 9 2017 More snow and pockets of freezing rain are expected today.
403 AM CST Mon Jan 9 2017 Southerly surface winds will increase today as low pressure develops across the central High Plains. We will see a nice rebound in temperatures with highs ranging from the middle 40s across the eastern Ozarks to the lower 50s along and west of the I-49 corridor. This will occur in advance of a cold front that will push trough the region by the evening.
Initially, it will be drizzle, but there could be a couple hours of patchy freezing drizzle early Tuesday morning before things get pushes to the east fairly quickly by 15z.
A surface boundary on the high plains will move through the forecast area as a warm front this morning. Another concern for today is the high temperature. A weak cold front will move through the forecast area tonight. The westerly component of the winds and a warmer air mass will keep temperatures a few degrees either side of 30 degrees for lows tonight.
Much warmer weather will continue for the rest of the week.
Currently this morning our IR satellite picture is denoting exiting mid level wrap around clouds to the east/northeast as an upper trough over Eastern Canada and New England pulls further away. At the surface, Eastern Conus ridging will weaken and move to the east toward the Atlantic Seaboard as well. Low level flow will shift across Central Alabama around the backside of the weakening/exiting ridge.
In the meantime, a weak coastal trough will remain along the coast allowing for a bit of east-northeast flow across the coastal plains this morning before flow becomes predominantly out of the south-southeast across the area tonight through Tuesday. We'll also begin to see another round of sea fog developing along the Texas coast as sea surface temperatures linger in the low 50s after the strong arctic cold front.
The short-range models all forecast the dissolution of the low level inversions over the valleys this morning.
635 AM EST Mon Jan 9 2017 Arctic high pressure will persist over the region through tonight, then gradually shift offshore on Tuesday.
958 AM EST Mon Jan 9 2017 High pressure will shift offshore of the Outer Banks tonight, but extend across the region through the weekend. Weak warm air advection will and abundant sunshine most areas will help temperatures rise into the lower to mid 40s across SC, coolest toward the Pee Dee, and about 45-50 across GA. Tonight: Cloud cover will increase slowly overnight from off the Atlantic as a coastal trough matures off the coast in response to high pressure shifting farther off the North Carolina Outer Banks.
Black ice is possible west of Caldwell, especially on the side roads, as temperatures have fallen below freezing this morning. Snow levels remain high this morning around 6000 to 7000 feet MSL but should lower this afternoon with passage of a weak cold front. The warmest temperatures will occur this morning with low to mid 40s expected in the lower valleys. The Lower Treasure valley will be cooler in the mid 30s. Another low pressure system moves inland across Washington State late tonight through early Tuesday which could enhance showers especially across our northern zones. Another Pacific warm front moves over the region beginning Tuesday afternoon. Both the trough and warm front will bring significant snowfall to the mountains of Central Idaho.
Moisture on the increase and starting to see isolated showers in the lower TX coastal waters. Ridge axis over the area will be weakening and retreating which only opens the door to more moisture and warmth this week.
High pressure will continue to move east as a zonal upper level flow develops over the area. The moderation trend gets underway today as high temps will climb into the low and mid 50s.
ahead of a cold front forecast to move into the OH and Mid MS valleys. As ridge builds in through Thu.
617 AM CST Mon Jan 9 2017 Southerly surface winds will increase today as low pressure develops across the central High Plains. We will see a nice rebound in temperatures with highs ranging from the middle 40s across the eastern Ozarks to the lower 50s along and west of the I-49 corridor. This will occur in advance of a cold front that will push trough the region by the evening.
Although it will gradually shift eastward over the next couple of days, high pressure will remain across the Florida peninsula through at least mid-week and likely beyond that. An upper level ridge will remain across the Florida peninsula through this period. 9 inch and trapped in the low levels.
Temps this morning are slightly warmer than guidance suggested due to an increase in mid to high level cloud cover. The lee troughing while producing snow across the Colorado Rockies today will also sharpen surface pressure falls once again from SE Wyoming down to West Texas.
532 AM CST Mon Jan 9 2017 High pressure will continue to move away from the area with pronounced southerly flow increasing. As the high moves to the east, upper pattern does begin to flatten out somewhat but remains progressive in nature. Upper low will be moving towards the Pacific northwest coast during the day with a piece of upper level energy rotating on shore. The trailing cold front located from the parent low through the central plains and into the Texas panhandle.
The mundane pattern of no precip will persist today and tonight as weak upper level ridging continues to break down as it moves eastward across the Central Plains during the period. Temperatures will climb well above normal as the aforementioned southerly flow draws much warmer air into western Kansas, pushing H85 temperatures well into the mid teens(C). Much warmer temperatures can be observed tonight with lows only down into the 30s(F) to near 40F in some locations. Due to a lack of available moisture, a dry frontal passage can be expected with some high clouds likely as a strong upper level jet streams eastward out of the Colorado Rockies into the high plains.
716 AM EST Mon Jan 9 2017 Aviation Lake effect snow showers from Muskegon to Ludington will slowly decrease today, then low pressure moving in from the west will bring snow tonight. Southwest flow lake effect snows will be winding down today as inversion heights crash with drying and subsidence as sfc ridging moves in. The Tuesday morning commute will be messy then conditions should improve as sfc temperatures rise above freezing during the morning and snow transitions to rain. Do not expect any icing as strong warm advection in low level southerly flow should allow sfc temps to quickly rise above freezing.
Southerly winds aloft/at surface advects in warmer air across the southern portion of the forecast area and will change precipitation over to a wintry mix of sleet/freezing rain/possibly rain mainly after 03z. then change over or become a wintry mix of freezing rain/sleet/snow during the day Tuesday.
With the CWA remaining in between a large high pressure ridge in southeast US and a frontal system/low pressure area extending from WI into IA, southerly winds will continue through the day with some gusts around 20 mph. Based on sfc temp forecast, the freezing rain should remain north of the CWA tonight. Temps will be warmer today, reaching the middle 30s across the area. Tonights temps should be slowly warming or remaining steady, remaining in the lower to middle 30s.
Increasing clouds over the area overnight has resulted in temps remaining a bit warmer and with light winds wind chills are well above advisory criteria and thus coord with WFO BIS and will drop wind chill adv. Moisture in the lowest levels not as much as mid and high levels so do think snowfall will be quite light but with cold temperatures a fluffy inch or so is likely.
Cooler tonight into mid- week with snow levels lowering back to valley floors.
A broad area of low pressure was located over the Eastern Pacific this morning, centered well off the Washington/British Columbia coast. In addition, a moist cold front will sweep across the area. Most showers ending after 00Z, but some low CIGS may continue over the higher terrain into this evening.
The freezing rain threat has also moved northward. Temperatures will continue to hover slightly above freezing for the lower elevations, returning to below freezing occasionally on Tue through Wed.
Upper ridge axis will move into the central plains today while a surface warm front continues to lift north into Nebraska. Nonetheless, expecting high temperatures to reach the lower and perhaps mid 60s in some locations. Tuesday will be partly sunny and a little cooler, but highs still reaching the lower 50s.
Temperatures will be warmer both today and tonight with non-diurnal temperature trend tonight. Next cold front will likely push across about half the area by daybreak.
1007 AM EST Mon Jan 9 2017 Strong and cold high pressure north of the area today with a coastal trough developing just southeast of our area. The coastal trough will continue to develop and eventually lift north through our coastal waters this afternoon through tonight. Mainly VFR to prevail today, however, a coastal trough will bring an increase in stratocumulus clouds and some scattered to broken ceilings near 3k feet will be possible for the coastal terminals. Inverted coastal trough developing over the waters today with winds generally out of the northeast around 15 to 20 knots offshore and around 15 knots nearshore. SCEC conditions will however continue over the offshore zones tonight to account for some 15 to 20 knot winds as the coastal trough lifts north with some scattered light shower activity.
751 AM EST Mon Jan 9 2017 Update Lake effect snow showers from Muskegon to Ludington will slowly decrease today, then low pressure moving in from the west will bring snow tonight. Southwest flow lake effect snows will be winding down today as inversion heights crash with drying and subsidence as sfc ridging moves in. The Tuesday morning commute will be messy then conditions should improve as sfc temperatures rise above freezing during the morning and snow transitions to rain. Do not expect any icing as strong warm advection in low level southerly flow should allow sfc temps to quickly rise above freezing.
Return flow will fully set up today, so we can expect significantly warmer temperatures today and tonight, with unseasonably warm temperatures beginning tomorrow as the surface pressure gradient really tightens up.
Heavy snowfall mixed with freezing rain has certainly created an impact across north central Idaho, and even moreso across west central and northwest Montana. Late last night into this morning, widespread snowfall rates of 1 to 2 inches per hour were observed, followed by bouts of freezing rain and sleet.
Current surface analysis places ridge over the northern plains into the central plains with low over southeast Wyoming. Upper level analysis places rather weak ridge over the Rockies with trough over the eastern conus bringing west-northwest flow over our area.
650 AM EST Mon Jan 9 2017 High pressure will shift offshore of the Outer Banks tonight, but extend across the region through the weekend. Tonight: Cloud cover will increase slowly overnight from off the Atlantic as a coastal trough matures off the coast in response to high pressure shifting farther off the North Carolina Outer Banks.
733 AM MST Mon Jan 9 2017 Issued a freezing rain advisory for the Grand Valley and the Debeque to Silt Corridor until noon today. The short-range models all forecast the dissolution of the low level inversions over the valleys this morning.
A strong high pressure ridge axis stretched north-south from western WY through western CO and NM. Light isentropic freezing precip earlier over over western NE had ended. Light rain or rain mixed with snow is expected for the lower valley floors where temperatures will range from 35-40 degrees. Along and east of I-25 no precipitation is forecast due to the dry downslope winds, which will push the mercury into the low-mid 50s. The respite from the high winds will be brief however as the CAG-CPR gradients ramping up rather quickly late tonight, peaking between 75 and 85 meters Tuesday afternoon. Not confident to include the Cheyenne and Wheatland areas at this time, though the high wind probabilities peak at 58 percent for Cheyenne at 21Z Tuesday. A Pacific front will sweep through the CWA early Tuesday with high temperatures about 10 degrees cooler.
Trailing, well-advertised cold front expected to track south across our region on Tuesday, but scope of cold air behind the boundary looks less than impressive in comparison to recent model runs.
420 AM CST Mon Jan 9 2017 Current surface analysis places ridge over the northern plains into the central plains with low over southeast Wyoming. Upper level analysis places rather weak ridge over the Rockies with trough over the eastern conus bringing west-northwest flow over our area.
As a result, temperatures are much warmer than previous nights with current values in the 30s and 40s across the area. By Tuesday, we should see a southwesterly to the low-level flow.
Large high pressure is currently along the Carolina coastline, with a tight gradient persisting across the local area. The local morning sounding has shown the lowest layer winds (up to about 5000 feet) have veered more prominently from the northeast to east over the past 12 hours. A small craft advisory remains in effect for all waters surrounding the Florida Keys, remaining fresh to strong through the remainder of the forecast as strong high pressure settles slowly off the southeast coast into the western North Atlantic. On this date in Keys history, in 1953, the low temperature in Key West dipped to 47 degrees.
417 AM MST Mon Jan 9 2017 Upper ridge axis will move into the central plains today while a surface warm front continues to lift north into Nebraska. Nonetheless, expecting high temperatures to reach the lower and perhaps mid 60s in some locations. Tuesday will be partly sunny and a little cooler, but highs still reaching the lower 50s.
Inverted trough expected to weaken into this afternoon with winds becoming northeast over much of the region.
/issued 330 AM CST Mon Jan 9 2017/ Arctic high pressure that has been in place across the Mid South over the past few days will move east as upper level troughing over the eastern U. An isallobaric response over our region between this deepening low pressure system and departing high pressure to the east will support a tightening pressure gradient later tonight into Tuesday. Isolated showers will be possible over the western half of the Mid South late tonight and across the entire region Tuesday with increasing coverage ahead of a stalling cold front to our northwest.
249 PM EST Fri Mar 10 2017 High pressure building down from western Canada will push bitter cold air across the region through this weekend.
The region is transitioning into a warmer and more breezy setup as the previous wet weather system moves out of the region.
/issued 347 AM CST Fri Mar 10 2017/ Cooler regime will dominate the forecast next several days, closer to or even below average.
Ridge of high pressure will build into the area with drier air advecting into the Tennessee Valley. Chattanooga Airport, TN 63 33 50 32 / 10 0 30 80 Knoxville McGhee Tyson Airport, TN 57 30 42 28 / 20 0 30 80 Oak Ridge, TN 57 28 42 27 / 20 0 40 80 Tri Cities Airport, TN 53 24 38 27 / 40 0 40 80 TN.
It will be much cooler today and for many along and east of the CO/KS border below normal with highs ranging from the mid 40s east to mid 50s/near 60 far west. a northeast to southwest oriented band of moisture in the 850-500mb column associated with an upper level disturbance behind an advancing cold front moves through during the day bringing a small chance for light precipitation. Low temperatures expected to range from the low 20s east to around 30 west.
221 PM EST Fri Mar 10 2017 A cold front has slipped south of the Mid Atlantic.
/Issued 236 AM CST Fri Mar 10 2017/ Backdoor cold front has moved through all but the far southwest Texas Panhandle early this morning. A cold front will push southward across the panhandles on Saturday in association with a mid level short wave trough. This trough will combine with the lift from the front and it will work on the low level moisture across the southeast half of the Texas Panhandle to bring some showers and possibly some thunderstorms.
1004 AM CST Fri Mar 10 2017 Back-door cold front making its way swwd across our region this morning. This activity was developing well ahead of a southward moving cold front across Southern Arkansas and Southeast Oklahoma which will backdoor its way into our region from the north and east throughout the day. Terminals that become MVFR or IFR later this morning should become VFR once again during the late morning or afternoon hours in the wake of the backdooring cold front. /issued 459 AM CST Fri Mar 10 2017/ A cold front moving into the Red River Valley from the north brought a line of strong thunderstorms along an outflow invok frontal boundary, which have mostly diminished during the wee hours. A stronger cold front will move quickly across area later Saturday into Sat night.
Latest guidance suggests freeze warning for tonight needs to be expanded area wide as 1045 mb Canadian high pressure ridges southward through the eastern half of the nation. Most model thermal profiles still suggest the column will be cold enough to support mainly snow with the system, with only the lowest few hundred feet at or above freezing. However, warm antecedent surface temperatures may limit impacts, esp during the day with air temps just near/just above freezing and the ever increasing sun angle. Any travel impacts would likely be limited to around/after sunset as temps fall back below freezing.
This initial activity is developing along a stalled frontal boundary, where dew points have pooled in the lower 60s. Into the evening, The front will slowly begin to lift northward, as the subtle 500mb short wave trough exits eastward. Through the morning hours, the forecast remains rather messy, as north Texas remains within a region of broad ascent, flanked by another weak, subtle 500mb short wave trough approaching from the west, across the Four Corners. Scattered shower and thunderstorm chances will increase through the day as the trough swings across the region.
The upper level trough will give way to more zonal flow later today into Saturday. The HRRR is more aggressive in pushing the mid level temps above 0C just before sunrise, so the potential for freezing drizzle/rain for short period of time does exist for the morning commute from Big Timber east towards Hardin. Decided to continue the winter weather highlights over the central zones, keeping the freezing drizzle/rain wording in there. Models do appear to continue to favor more bullish warming trend, with a more easterly encroachment of the upper level ridge.