Aikyam-Lab/Synoptic-Bench huggingface dataset:
321 AM EDT Thu May 26 2022 Rain chances will gradually increase ahead of an approaching cold front that will cross the coast late Friday. Extensive post-frontal clouds this morning, temperatures a little cooler than normal for the season. A weak warm front lifts north today, marginal moisture along I-95 corridor and heating may bring isolated showers to western zones mid to late afternoon, well ahead of large cyclone structure approaching SE states.
(Today) Another cool day is in store for eastern Oklahoma and western Arkansas as an upper level low currently centered over northeast Oklahoma/Southeast Kansas meanders off to the east.
Meanwhile, high pressure ridge should remain in control over the area keeping south to southeasterly winds in place. Then, the aforementioned ridge is pushed east as upper level trough makes its way across Midwest on Friday.
Several additional waves of showers and some thunderstorms are anticipated to move across the area through this afternoon as the upper level low that has brought us the rain the past few days moves slowly eastward across the Midwest. Scattered showers and a few thunderstorms will continue to rotate across the area tonight into Friday as the upper low passes slowly by to our north. Northwest flow aloft behind the upper low will keep temperatures on the cooler side tomorrow with highs only reaching the upper 60s to mid 70s. Precip will finally end completely across the cwa by Friday evening as the upper low moves far enough away, and a cooler drier airmass advecting in will allow lows to drop into the 50s areawide Friday night.
The axis of this upper low will generally be along the Mississippi River by the end of the day on Thursday. A very deep and moist south to southwest flow will persist across our area through most of Thursday in advance of the upper level low and associated deep trough that will be slowly progress eastward toward our area. Lows tonight and Thursday night are expected to be in the low to mid 60s over inland areas and lower 70s at the coast. Highs on Friday will be warmer, ranging from 81 to 87 degrees.
Still no clear signal upstream that organized convection will be initiated this afternoon as warm advection is rather broad with no clearly defined warm front to focus on. Cold front pushes through Friday with rain and some embedded thunder persisting along and ahead of the front into the evening before ending from northwest to southeast.
1131 PM CDT Wed May 25 2022 Satellite imagery continues to show the upper closed low spin over portions of the central/southern Plains. As the main upper level system continues east into the Ohio Valley, upper ridging will move overhead for the weekend.
222 AM MDT Thu May 26 2022 Current surface map places weak trough across western South Dakota. Upper level ridge is currently building across the Northern Plains. Warm advection continues, with low level thermal ridge peaking Friday. Upper level ridge breaks down Friday with weak impulse moving into the western Dakotas Friday afternoon/evening. Weak cold front slides into the area late in the day. Unsettled pattern setting up for the holiday weekend with slow moving upper trough over the Intermountain West.
1002 AM EDT Thu May 26 2022 A slow, eastward progressing upper low keeps the pattern unsettled through Friday, with periods of showers and thunderstorms expected.
Behind this convection, a cold front, currently located generally along I-59 south to the southshore and SE LA will swing through the area, delivering drier air and clearing skies. No adjustments required for lows Friday morning as we will see temperatures dipping to around 5 to 8 degrees cooler than previous mornings for inland (central/northern) areas, but lower dewpoints will help to make it feel much more comfortable. The cold front at that time appears to extend from Jackson to Lafayette, probably just moving into the Baton Rouge Metro area.
Forecast highs today match guidance and look good, about 10 degrees warmer than yesterday.
The high pressure over our area will be pushed to the east by a strengthening low pressure system off the northwest US coast.
(Today and tonight) Wrap-around precipitation will be ending across north central Oklahoma this morning as the upper low over southeastern Kansas moves east away from the area. With more sunshine, we will get warmer today, although highs will still be below average for this time of year.
910 AM EDT Thu May 26 2022 Rain chances will gradually increase ahead of an approaching cold front that will cross the coast late Friday. Extensive post-frontal clouds this morning, temperatures a little cooler than normal for the season. A weak warm front lifts north today, marginal moisture along I-95 corridor and heating may bring isolated showers to western zones mid to late afternoon, well ahead of large cyclone structure approaching SE states.
524 AM MDT Thu May 26 2022 Current surface map places weak trough across western South Dakota. Upper level ridge is currently building across the Northern Plains. Warm advection continues, with low level thermal ridge peaking Friday. Upper level ridge breaks down Friday with weak impulse moving into the western Dakotas Friday afternoon/evening. Weak cold front slides into the area late in the day. Unsettled pattern setting up for the holiday weekend with slow moving upper trough over the Intermountain West.
320 AM PDT Thu May 26 2022 After the record heat of the past couple of days, much cooler temperatures return through the Holiday weekend.
637 AM CDT Thu May 26 2022 Summary: High pressure will build in today before an active pattern begins.
1039 AM EDT Thu May 26 2022 The Florida Keys lie on the southwestern periphery of a large and broad ridge, situated across the western Atlantic. To the west of this feature lies a potent upper level trough situated across the mid-Mississippi River Valley that is making its way eastward. In addition with the approaching upper level trough, the ridge will slide east in response.
An upper ridge axis will move into the southern and central Rockies by early Friday morning. Light winds will continue tonight as an upper level high pressure ridge edges east over the southern and central Rockies. Dry and quiet weather will dominate tonight along with cool lows in the lower to mid 50s. Ridging aloft will be located over the forecast area on Friday, but will quickly be flattened as troughing moves into the Western U.
A quiet and slightly warmer night is expected. A weak sfc boundary will develop over the region late tonight in response to the upper- level trough spinning over the Mid-MS/Ohio Valley region. Southwest to south winds will remain along the coastal zones as a weak warm front lifts north.
522 AM CDT Thu May 26 2022 Summary: High pressure will build in today before an active pattern begins.
This will drop precipitable water values down to near an inch and veer surface winds towards the southwest as it's on the southeast side of the low. ==================================== Synoptic Overview ==================================== Compact, closed upper level low is forecast to be centered across the Ohio Valley at the beginning of the period.
621 AM EDT Thu May 26 2022 Rain chances will gradually increase ahead of an approaching cold front that will cross the coast late Friday. Extensive post-frontal clouds this morning, temperatures a little cooler than normal for the season. A weak warm front lifts north today, marginal moisture along I-95 corridor and heating may bring isolated showers to western zones mid to late afternoon, well ahead of large cyclone structure approaching SE states.
626 AM CDT Thu May 26 2022 (Today) Another cool day is in store for eastern Oklahoma and western Arkansas as an upper level low currently centered over northeast Oklahoma/Southeast Kansas meanders off to the east.
Above normal temperatures continue for a few more days before a weekend system brings cooler temperatures.
Once a cold front clears the area early this afternoon, conditions will improve and flight categories will return to VFR status for the remainder of the forecast period. A cold front continues to move east through the forecast area this morning. Some clouds associated with the east advancing low pressure system over Southwest Kansas could linger across mainly northern portions of the area this afternoon into tonight, otherwise mostly clear skies are expected across much of the area come late afternoon and into tonight. Highs today will range from the middle 70s north to the lower 80s south.
High pressure will strengthen over the region today into Friday while high temperatures warm to around 105 degrees for a good portion of the lower deserts.
A surface cold front continues to move through the area this morning. Dry conditions will continue for the rest of today with high temperatures in the low 80s. A cold front continues to move east through the forecast area this morning. Some clouds associated with the east advancing low pressure system over Southwest Kansas could linger across mainly northern portions of the area this afternoon into tonight, otherwise mostly clear skies are expected across much of the area come late afternoon and into tonight. Highs today will range from the middle 70s north to the lower 80s south.
643 AM CDT Thu May 26 2022 Overall scenario depicts a slowly departing low giving way to upper level ridging from the west.
842 AM MDT Thu May 26 2022 Upper ridge of high pressure will build over the region today with dry conditions and warmer temperatures. Forecast highs today match guidance and look good, about 10 degrees warmer than yesterday.
It is not quite as muggy as it has been, with dewpoint temperatures in the lower 70s, down a few degrees from 24 hours ago.
A complex forecast is shaping up today, as multiple waves of showers and thunderstorms are expected to develop and push across the Tennessee Valley along and ahead of a cold front. Additional clusters of showers and storms have developed just ahead of and along the synoptic cold front draped just east of the Mississippi River. Southerly low-level wind shear is expected to gradually increase through the morning hours as the mid/upper trough pivots into the Mid South/lower Ohio Valley. Still, given the slow movement of the mid/upper low over the Ohio Valley, cloud cover will stick around in some capacity even into the day on Friday.
(Rest of Today) Multiple line segments of convection continue to develop across northwest into western AL, with another along the pre-frontal trough axis in northeast MS. Still, given the slow movement of the mid/upper low over the Ohio Valley, cloud cover will stick around in some capacity even into the day on Friday.
645 AM CDT Thu May 26 2022 For the 26/12Z TAF period, VFR conditions are expected to prevail with clouds mainly limited to mid and high clouds wrapping around the stacked sfc and upper lows to our north. /Today through Friday/ Upper-level trough to our north continues to slowly spin eastward from SE Kansas with low pressure stacked down to the sfc. Meanwhile, high pressure at the sfc will gradually build south from the Plains.
Temperatures will still remain fairly cool today with highs in the low 60s across western Iowa where clouds will remain longer, to the mid 70s in our far northwest. Meanwhile, upper heights will continue to build east into the region as upper-level ridging builds east across the Rockies.
We are back into a pretty quiet pattern for today and Friday as high pressure begins to build into the area. Temperatures will be warmer today than yesterday, with highs ranging from the mid 80s along the coast to near 100 degrees over the Rio Grande Plains. Highs will be just a few degrees warmer for Friday.
The cold front at that time appears to extend from Jackson to Lafayette, probably just moving into the Baton Rouge Metro area.
628 AM CDT Thu May 26 2022 Pesky slow moving upper low will continue to pinwheel and move eastward across Missouri today. Transient ridging aloft will move into the area on Friday with increasing southerly surface flow across central Kansas during the afternoon and continued warming over the forecast area.
Today through Friday night Weather becomes much more active this afternoon as a trof moving into the west coast tightens gradients, producing strong southwesterly winds this afternoon. The greatest chances for any wet showers and modest rain totals will be across the high terrain of N Elko County, namely the Jarbidge Wilderness and Independence Range. With exceptionally dry conditions continuing to be indicated in the lower levels, anticipate strong and erratic downdrafts and outflows from any thunderstorms in the area. The trof moving into the western U.
The upper low that brought this cloudy, rainy, chilly, dreary late May weather currently sits in southwest Missouri and will continue to pull to the east-northeast away from the area today and tonight. The greatest shower coverage is likely to remain on the north and east sides of the low, with less coverage on the backside in eastern Oklahoma and northwest Arkansas today.
/NEW/ /Through Friday/ IR imagery indicates a swath of high clouds spiraling southeast across North Texas around the base of an upper low, which was centered over Northeast Oklahoma early this morning, and that will be about the extent of any clouds across the region today. The warm-up will continue on Friday as a ridge strengthens overhead, with temperatures climbing into the 80s and 90s in the afternoon.
/issued 253 AM CDT Thu May 26 2022/ SHORT TERM (Now through Friday): Closed 500 mb low pressure centered roughly over Missouri will steadily move east into Ohio during the period. This will allow 500 mb high pressure centered roughly over north-central Mexico to shift northeast and become increasingly more dominant over the BRO CWFA. Although temperatures will ease into slightly above normal to above normal territory courtesy of the mid-level ridge, values for today and Friday are actually a few degrees below NBM model guidance due to widespread wetted soils from recent rains.
636 AM EDT Thu May 26 2022 A slow, eastward progressing upper low keeps the pattern unsettled through Friday, with periods of showers and thunderstorms expected.
Upper low was near Joplin, MO VCNTY with a stalled frontal boundary from nw MO to ne IA into central WI. Today: Upper low will track across the MO Ozarks to southern IN by 12z Friday. Spokes of PVA will rotate around this low and produce off and on showers and thunderstorms. Tonight: With the upper low tracking farther east the showers and storms will also gradually diminish or end from west to east overnight. Lows will be mainly in the lower to mid 50s. Cold Front midweek will bring chances for pops to area.
627 AM CDT Thu May 26 2022 (Today and tonight) Wrap-around precipitation will be ending across north central Oklahoma this morning as the upper low over southeastern Kansas moves east away from the area. With more sunshine, we will get warmer today, although highs will still be below average for this time of year.
1252 PM CDT Thu May 26 2022 Summary: High pressure will build in today before an active pattern begins.
Pesky slow moving upper low will continue to pinwheel and move eastward across Missouri today. Transient ridging aloft will move into the area on Friday with increasing southerly surface flow across central Kansas during the afternoon and continued warming over the forecast area.
This front is connected to a fairly strong vertically stacked low pressure center located along the IA/IL/MO borders. This low will continue moving NE and push into the New England state Friday night/Sat morning. This low and frontal boundary continues to stream tropical moisture northward into the southern US but looks like that will come to an end with the frontal passage Tonight/Friday morning. 0-6km bulk shear looks sufficient (40-60kts through 12z Fri) in areal extent as the upper trof axis approaches.
233 PM CDT Thu May 26 2022 An upper ridge building into the area will keep us dry with weak northwest flow tonight into tomorrow. An upper ridge axis atop the region Friday night will translate downstream of the region this weekend ahead of winds backing more SW aloft. Along with lee troughing poised to our NW during this time, deep, dry and breezy to windy SW flow will boost temps to well above normal values with triple digit highs still in the cards for most of the region Sat and Sun.
Cold front is crossing the TN river, with two lines of convection out ahead. All clear will come behind the cold front, with the severe threat decreasing by this evening. Cold front will clear our area overnight, ushering out showers and t'storms at least briefly.
DGS Chattanooga Airport, TN 75 62 77 59 81 / 90 70 20 10 10 Knoxville McGhee Tyson Airport, TN 76 62 76 59 78 / 100 80 50 20 10 Oak Ridge, TN 76 61 75 57 79 / 90 80 50 30 10 Tri Cities Airport, TN 74 61 76 56 75 / 80 80 60 40 10 NC.
1242 PM CDT Thu May 26 2022 Overall scenario depicts a slowly departing low giving way to upper level ridging from the west.
309 PM CDT Thu May 26 2022 Upper low pressure system will continue to slowly pinwheel east through the mid MS River Valley and into the the lower OH/Wabash River Valleys tonight. We finally get on the back side of this upper low on Friday. The cloudiness will likely help hold max temperatures in the lower half of the 70s.
An incoming upper level trough will bring cooler temperatures and scattered thunderstorms to the region tonight and tomorrow. Another passage of cooler air will bring a second push of thunderstorms across the West Central and Boise Mountains overnight.
Otherwise, upper ridging will build in tonight and remain across the area through most of the weekend, while a trough deepens over the western CONUS. Leeside troughing will support a tightening pressure gradient over the region, leading to breezy south winds across the area throughout the Holiday Weekend.
Despite the increasing cloud cover, highs in the mid 70s to low 80s are expected across the forecast area with southeasterly WAA ahead of the low. Low pressure will reach the Montana/ND border Friday afternoon, with CAMs indicating scattered showers and a few thunderstorms moving in with it. An upper-level longwave trough is still forecasted to sit over the western CONUS through the holiday weekend, with multiple embedded waves expected to move through the southwesterly flow aloft across the northern Plains.
Mid level ridging will build over Deep South Texas from the west and at the surface, high pressure will remain in control.
A surface cold front will press in from the northwest through this evening then move ever so slowly southeast tonight. Meanwhile, upper level troughing will continue to extend northward into lower Michigan through tonight. Temperatures will be cooler with lows ranging from the low and mid 40s north to the low and mid 50s southeast.
250 PM EDT Thu May 26 2022 A low pressure system track through the Ohio Valley today and across the Northeast U.
This is associated with a stalled frontal zone in the low-levels above the surface in the northwest flow branch of the jet stream. This deformation area and front aloft will be very slow moving today per RAP low-level wind/height forecasts with increasing northwest flow deepening as the southern low pressure area finally pulls further east. In the south, dewpoints are in the low-60s and instability continues to grow slowly with cloud cover breaks seen in the IL/IA area south of the front. As mentioned with the northerly flow and trough push in the northern stream occurring later today, this timing does tend to push the cold front southeast, near or just out of Grant county by 4-5 pm.
Deep moisture transport continues in southerly flow ahead of the upper low and p-wats will continue to be 1. The cold front moves through on Friday with showers and thunderstorms, again concentrated across the southeast zones as low level convergence is greatest there during the time of max diurnal instability.
Showers continue on Friday as a closed low tracks across the south. The closed upper low over southern Missouri will continue its slow track east-northeast tonight through Friday. Cooler and more stable conditions are also expected on Friday, so thunder will be even less likely as the low moves into Ohio and the low-level flow shifts northwesterly. Showers taper off Friday night as the low moves into Pennsylvania.
Tonight, winds will diminish to light and variable during the evening hours, and lows will be quite a bit warmer as moisture increases across the area, limiting overnight cooling.
221 PM EDT Thu May 26 2022 Warmer weather and increasing chances for showers and thunderstorms are in store today. A cold front will cross the area Friday, with a few strong thunderstorms possible in the afternoon.
245 PM EDT Thu May 26 2022 Cold front brings showers and storm chances today and Friday.
This will be a result of broad high pressure building in from the Plains along with steadily increasing heights. Clouds will linger longest in the east, with clouds likely hanging on until late afternoon, which may result in slightly cooler temperatures. Friday Night Through Thursday 500mb ridge is expected to build across the eastern United States over the upcoming holiday weekend.
A few showers may redevelop later this evening as a spoke of vorticity and cold pocket aloft rotate around the upper low moving into the lower OH valley.
Morning showers and storms have since exited the area with VFR conditions behind the cold frontal passage. /TW/ A surface cold front continues to move through the area this morning. Dry conditions will continue for the rest of today with high temperatures in the low 80s. A cold front continues to move east through the forecast area this morning. Some clouds associated with the east advancing low pressure system over Southwest Kansas could linger across mainly northern portions of the area this afternoon into tonight, otherwise mostly clear skies are expected across much of the area come late afternoon and into tonight. Highs today will range from the middle 70s north to the lower 80s south.
229 PM CDT Thu May 26 2022 Tonight and Tomorrow: A vertically stacked closed upper low over southern Missouri will lift northeast into Ohio through the forecast period. At the surface, a cold front has pushed through the area with a noticeably drier and cooler airmass spilling into the region. Warp around moisture may foster the development of a few isolated showers across the Highway 82 corridor tonight as the upper low slides by, otherwise mostly clear skies are expected. /TW/ Memorial Day weekend: Mid and upper ridging will increase across the region through this weekend, maintaining dry conditions in our area.
A cold front is expected to push eastward across the area on Friday, clearing out remaining showers and thunderstorms along with it.
A rather pleasant late May day is underway across South Texas this afternoon as upper level ridging takes control. More of the same is expected on Friday as high pressure shifts further east. Highs look to be a few degrees warmer than today with temps rebounding into the upper 80s to upper 90s.
After todayâs above normal high temperatures, a cold front passage Friday morning will keep temperatures closer to normal. A trough with low pressure circulations is expected to dominate the weather pattern through the weekend.
354 PM EDT Thu May 26 2022 A cold front will move through the region on Friday bringing unsettled weather. High pressure will then prevail through early week. A field of weak instability will move into the region ahead of an approaching cold front. Friday: A slow moving cold front will eventually make its way through the region before pushing offshore late. Otherwise, with decent rainfall expected and a somewhat slow moving cold front, showers could linger in areas causing low-lying areas to see ponding and/or minor flooding.