Aikyam-Lab/Synoptic-Bench huggingface dataset:
A weak cold front will move across West Central TX early Sunday, shifting winds to the northwest. A large upper level trough will encompass the eastern half of the CONUS today, keeping northwest flow over the area this weekend. Weak downsloping west to northwest surface winds will contribute to warmer temperatures today with afternoon highs in the upper 50s areawide. It will be a little warmer tonight with overnight lows in the low to mid 30s.
1258 PM EST SAT JAN 24 2015 A WEAK TROUGH OF LOW PRESSURE WILL DROP ACROSS THE LOWER GREAT LAKES TODAY. A COLD FRONT WILL DROP ACROSS THE LOWER LAKES TONIGHT. A WAVE OF LOW PRESSURE IS EXPECTED TO DEVELOP ON THE FRONT. THE LOW WILL LIKELY TRACK ACROSS THE OHIO VALLEY ON SUNDAY.
349 PM EST SAT JAN 24 2015 LOW PRESSURE WILL MOVE THROUGH THE GULF OF MAINE TONIGHT WITH HIGH PRESSURE BUILDING IN FOR SUNDAY.
Skies will be clear overnight allowing temperatures to reach the low 30s inland to near 40 at the coast.
A COLD FRONT. AS UPPER LOW BEGINS TO WRAP UP AND DIVE SE ACROSS THE OHIO VALLEY TOMORROW. UPPER LVL RIDGING OVER WESTERN STATES WILL FLATTEN OUT BY MID WEEK AS THE ZONAL FLOW AND SEASONALLY WARM TEMPS CONTINUE FOR THE REGION.
201 PM EST SAT JAN 24 2015 ANOTHER WEAK UPPER TROF WILL BRING COLDER AIR TO CENTRAL PA TONIGHT.
HIGH/MID CLOUDS WILL INCREASE SURROUNDING A COLD FRONT ARRIVING FROM THE NORTH. (46) HIGH PRESSURE AND SUNNY SKIES CONTINUE ACROSS THE AREA.
416 PM EST SAT JAN 24 2015 CURRENT CONDITIONS ACROSS THE AREA FEATURE SOME EXTENSIVE CLOUD COVER MOVING SOUTHEAST THROUGH THE AREA ASSOCIATED WITH A WEAK TROUGH.
WITH THE MAIN ACCUMULATING SNOW OCCURRING SOUTH AND WEST OF THE HIGHWAY 52 CORRIDOR ACROSS SOUTHEAST MINNESOTA/NORTHEAST IOWA. THE LOW EXITS THE REGION ON SUNDAY WITH SNOW ENDING.
THE COLD FRONT IS IN PLACE ACROSS THE FLORIDA STRAITS THIS AFTERNOON WITH HIGH PRESSURE BUILDING INTO THE AREA FROM THE WEST. HIGH PRESSURE WILL CONTINUE ACROSS THE AREA AT THE SURFACE FOR SUNDAY AS A DRY REINFORCING FRONT APPROACHES THE AREA. THE UPPER-LEVEL PATTERN WILL REMAIN AMPLIFIED WITH A RIDGE OVER THE WESTERN PART OF THE COUNTRY AND A DEEP TROUGH OVER THE EAST.
PRIMARILY LIGHT WESTERLY WIND WILL BECOME STRONG NORTHWEST 12-15Z TOMORROW MORNING AS WINDS RESPOND TO DEVELOPING SURFACE CYCLONE OVER MID- MISSISSIPPI VALLEY.
510 PM CDT TUE APR 14 2015 336 PM CDT AN AMPLIFIED PATTERN ALOFT IS NOT BEING HANDLED IN A VERY SIMILAR MANNER BY THE VARIOUS DETERMINISTIC MODELS BUT ALL HAVE A BASIC AGREEMENT IN DIGGING A BROAD UPPER LOW INTO THE FOUR CORNERS REGION OVER THE NEXT TWO DAYS. DOWNSTREAM RIDGING WILL SUPPORT CONTINUED MILD TEMPERATURES AND RELATIVELY LIGHT WINDS LOCALLY. THE DOMINANCE OF THE RIDGE TONIGHT AND TOMORROW WILL KEEP THE AREA DRY.
300 PM CDT TUE APR 14 2015 UPPER RIDGE AXIS WILL TRANSLATE EAST OVERNIGHT LEADING TO INCREASING SOUTHWEST FLOW ALOFT WEDNESDAY AS THE NEXT UPPER LEVEL LOW PRESSURE SYSTEM DIGS TOWARDS THE FOUR-CORNERS.
MEANWHILE UPPER TROF CURRENTLY OVER THE PACIFIC NW WILL DIG SOUTH OVERNIGHT AND CLOSE OFF A LOW OVER NORTHERN UTAH BY MORNING. A PACIFIC COLD FRONT WILL MOVE ACROSS THE CWA LATE TONIGHT INTO WEDS MORNING WITH MUCH COOLER AIR MOVING IN BEHIND IT. RAIN AND HIGHER ELEV SNOW STILL LOOKS TO SPREAD SLOWLY EAST ACROSS THE CWA WEDS AS THE UPPER LOW DRIFTS SE ACROSS UTAH WITH FAIRLY WIDESPREAD PCPN FOR WEDS NIGHT.
WITH LOW PRESSURE APPROACHING THE REGION AND CAUSING THE PRESSURE GRADIENT TO TIGHTEN. TODAY THROUGH WEDNESDAY NIGHT UPPER RIDGING CONTINUES ACROSS THE NRN PLAINS THIS MORNING WITH MOSTLY CLEAR SKIES OVER THE DAKOTAS. A STRONG UPPER TROUGH IS NOW MOVING ONSHORE THE PACIFIC NW. SURFACE ANALYSIS SHOWS LOW PRESSURE FROM THE NRN ROCKIES INTO THE CNDN HIGH PLAINS. STRONG UPPER TROUGH WILL CUT OFF NEAR ERN ID/NRN UT AREA TONIGHT AND BECOME SOMEWHAT NEGATIVELY TILTED WEDNESDAY. THE ECM/NAM SHOW THE UPPER LOW STAYING FARTHER SOUTH OVER THE GREAT BASIN DURING THE DAY. COLDER AIR WRAPPING AROUND THE LOW PUSHING INTO THE CWA WILL PROVIDE A TRANSITION FROM RAIN TO SNOW.
A COLD UPPER LEVEL TROUGH WILL SETTLE OVER THE AREA TONIGHT.
ISENTROPIC UPGLIDE/MOISTURE TRANSPORT IS PROGGED TO INCREASE WITH A DEVELOPING LLJ WED NIGHT AS A MID/UPPER TROUGH DIGS INTO THE CENTRAL ROCKIES AND LARGE-SCALE FORCING FOR ASCENT SPREADS DOWNSTREAM ACROSS THE CENTRAL PLAINS STATES.
HIGH PRESSURE IS RIDGE ACROSS THE STATE THIS MORNING WITH GENERALLY LIGHT WINDS AND SOME HIGH THIN CIRRUS PASSING THROUGH. THE AREA OF HIGH PRESSURE WILL SHIFT SLOWLY EAST/NORTHEAST TODAY. AN UPPER LEVEL LOW PRESSURE OVER NORTHERN TEXAS EARLY THIS MORNING WILL LIFT NORTHEAST INTO KANSAS BY LATE AFTERNOON.
Clouds will hang around today, which may keep temps slightly cooler with highs in the mid to upper 60s. As the mid/upper level low approaches isentropic lift and moisture advection will support scattered showers. There is a rather deep layer of dry air in the lower levels that it will have to overcome before precip reaches the ground.
156 PM EDT TUE APR 14 2015 HIGH PRESSURE IN THE GREAT LAKES AND LOW PRESSURE IN THE TENNESSEE VALLEY WILL HAVE A COOL AIRMASS OVER THE OHIO VALLEY WITH RAIN ENDING OVER THE SOUTHERN OHIO VALLEY THIS MORNING. THE HIGH WILL CONTINUE TO PUSH DRIER AND SOMEWHAT COOL AIR TO THE REGION THROUGH WEDNESDAY.
HOWEVER, THIS WILL DO VERY LITTLE TO DRAW WARMER AIR INTO THE REGION WITH H85 TEMPERATURES RANGING FROM A LITTLE UNDER 10C ACROSS CENTRAL KANSAS TO NEAR 15C IN EXTREME SOUTHWEST KANSAS.
125 PM EDT TUE APR 14 2015 HIGH PRESSURE WILL DRIFT INTO THE GREAT LAKES AND PROVIDE THE REGION WITH FAIR WEATHER AND SEASONABLE TEMPERATURES INTO WEDNESDAY.
/ISSUED 407 AM CDT Tue Apr 14 2015/ The upper low that brought rain to the area has moved off to the northeast this morning. The next upper trough will move ashore the NW coast today quickly moving east before developing into a closed low over WY early Wednesday.
TONIGHT VFR CONDITIONS WILL GRADUALLY BECOME MAINLY MVFR OVERNIGHT WITH PATCHY FOG AND THE LOWER CLOUDS.
IT WILL ALSO ALLOW THE HIGH TO DRAW SOME DRIER AIR DOWN THE COLUMN. A TELECONNECTED WEAK UPPER RIDGE WILL CONTRIBUTE TO THIS RELATIVE SHORT TERM DRY PERIOD AS IT MOVES OVERHEAD TONIGHT. AS THE MEAN UPPER LEVEL FLOW BACKS IN RESPONSE TO THE 100-120 KT JET CORE DIGGING A LONG WAVE TROF OVER THE MID ROCKIES REGION.
THIS AREA OF LOW PRESSURE IS EXPECTED TO PROGRESS EAST INTO THE CAROLINAS AS WE MOVE TONIGHT ALONG WITH THE RAINFALL. THE QUESTION THAT REMAINS FOR OVERNIGHT HOURS IS WHAT WILL HAPPEN WITH YET ANOTHER UPPER LEVEL WAVE TRACKING NORTHEAST OUT OF THE LOWER MISSISSIPPI RIVER VALLEY. WHILE THE EASTERN US IS DOMINATED BY RIDGING AND THE WESTERN US IS DOMINATED BY A SPLIT FLOW WITH A CUT OFF LOW IN THE SOUTHERN STREAM.
LIGHT RAIN WILL SLOWLY DECREASE IN COVERAGE THIS AFTERNOON AS THE MID/UPPER LOW DEPARTS THE AREA. /ISSUED 425 AM CDT TUE APR 14 2015/ UPPER LOW OVER SOUTHWEST OKLAHOMA CONTINUES TO WADDLE SLOWLY NORTHEAST.
THE PATTERN ALOFT FEATURED AN UPPER TROUGH OVER THE ROCKIES. SOUTHWEST FLOW ACROSS THE CENTRAL PLAINS WITH A WEAKER TROUGH LIFTING OUT FROM THE SOUTHERN PLAINS ACROSS EASTERN KANSAS. THE WESTERN TROUGH IS PROGGED TO DEEPEN WITH LOW PRESSURE CIRCULATION CLOSING IN THE CENTRAL ROCKIES AND EVENTUALLY CUTTING OFF AND MEANDERING SOUTH TOWARD THE FOUR CORNERS REGION ON WEDNESDAY. TEMPS ARE FORECAST TO BE FAIRLY SEASONAL WITH HIGHS IN THE LOW/MID 60S OVERALL AND WINDS AGAIN WILL BE STEADY/GUSTY FROM THE SOUTHEAST.
HIGH PRESSURE MOVING INTO THE AREA TODAY ALLOWING FOR LIGHT PRESSURE GRADIENT WITH WELL DEVELOPED LAKE BREEZE LIKELY TO FORM AND PUSH INLAND RESULTING IN THE TYPICAL APRIL LARGE SPREAD IN TEMPS FROM LAKEFRONT TO POINT WELL INLAND.
Most areas remain dry this afternoon however areas across the higher terrain could still see an isolated thunderstorm or two before the day is over.
338 PM EDT TUE APR 14 2015 A SECONDARY COLD FRONT WILL PUSH OFFSHORE TONIGHT.
Mild temperatures look to continue, with highs generally around 70 tomorrow and lows around 50 tonight and a little warmer tomorrow night.
502 PM EDT TUE APR 14 2015 AN AREA OF HIGH PRESSURE WITH QUIET.
LOW PRESSURE WILL TRACK EAST ACROSS TENNESSEE TODAY AS HIGH PRESSURE OVER THE UPPER MIDWEST BUILDS INTO THE GREAT LAKES.
SATELLITE SHOWS ONGOING SHEARING OF THIS HIGH CLOUD WITH SOME THINNING AND SUSPECT THIS HIGH CLOUD TO EVENTUALLY GIVE WAY TO CLEAR SKIES TONIGHT. LOW DEWPOINTS AND HIGH PRESSURE SUPPORT CHILLY TEMPERATURES TONIGHT. SUB FREEZING IN THE THUMB.
THIS EVENING THROUGH WEDNESDAY NIGHT UPPER RIDGING COVERS THE CENTRAL CONUS. AND TROUGH IS DIGGING INTO THE WEST COAST. TIGHT PRESSURE GRADIENT IS DEVELOPING ACROSS THE REGION AS LOW PRESSURE PUSHES IN FROM THE WEST. COLD FRONT BEGINS MOVING INTO THE REGION TONIGHT.
646 PM EDT TUE APR 14 2015 A SECONDARY COLD FRONT WILL PUSH OFFSHORE TONIGHT.
438 PM EDT TUE APR 14 2015 HIGH PRESSURE IN THE GREAT LAKES AND LOW PRESSURE IN THE TENNESSEE VALLEY WILL HAVE A COOL AIRMASS OVER THE OHIO VALLEY WITH RAIN ENDING OVER THE SOUTHERN OHIO VALLEY. THE HIGH WILL CONTINUE TO PUSH DRIER AND SOMEWHAT COOLER AIR TO THE REGION THROUGH WEDNESDAY.
AND WEDNESDAY THE LATEST RAP ANALYSIS AND SATELLITE/RADAR IMAGERY SHOW SPLIT FLOW ACROSS NORTH AMERICA CONSISTING OF A RIDGE OVER THE ROCKIES. A TROUGH OVER THE SOUTHERN PLAINS. THE WESTERN GREAT LAKES RESIDES DOWNSTREAM OF THE RIDGE. HIGH PRESSURE WILL DRIFT ACROSS THE REGION. WHICH SUPPORTS DROPPING DEWPOINTS INTO THE LOW TEENS UP NORTH. HIGH PRESSURE WILL REMAIN PRESENT ACROSS THE REGION. SHOULD SEE THIN CIRRUS INVADE FROM THE SOUTH AHEAD OF A WEAK UPPER LOW ACROSS THE PLAINS. BUT STILL WENT WITH THE LOWEST GUIDANCE.
HOWEVER, THIS WILL DO VERY LITTLE TO DRAW WARMER AIR INTO THE REGION WITH H85 TEMPERATURES RANGING FROM A LITTLE UNDER 10C ACROSS CENTRAL KANSAS TO NEAR 15C IN EXTREME SOUTHWEST KANSAS. AN UPPER LEVEL LOW WILL APPROACH CLOSER TO THE REGION ON WEDNESDAY. CAPE AND SHEAR WILL BE ON THE LOWER END SIDE, SO THERE WILL BE A CHANCE FOR STRONG TO MARGINALLY SEVERE THUNDERSTORMS.
EXPECT AN OVERALL INCREASE IN PRECIP COVERAGE ACROSS MAINLY NORTHEAST/EAST CENTRAL OK THIS MORNING AS THE LOW SLIDES BY. UPPER LOW CONTINUES TO LIFT NORTHEAST WITH DECREASING RAIN CHANCES WEDNESDAY BEFORE ANOTHER UPPER LOW MOVES TOWARD THE AREA BY LATER IN THE WEEK.
ALONG WITH A MID-LEVEL RIDGE AXIS SLOWLY TRANSLATING THROUGH THE REGION TONIGHT.
255 PM EDT TUE APR 14 2015 AN AREA OF HIGH PRESSURE WITH QUIET.
A LITTLE COOLER TEMPS FAR NORTHERN MIDDLE TENNESSEE NORTHWARD.
SUBJECTIVE 12Z UPPER AIR ANALYSIS INDICATES UPPER- LEVEL TROUGH DEEPENING AND DIGGING INTO THE WESTERN US. A COLD FRONT EXTENDED FROM THE 850MB LOW CENTERED IN AB THROUGH ID/NV/SOUTHERN CA. 850MB RIDGE EXTENDED FROM CENTRAL IA THROUGH THE EASTERN DAKOTAS. BROAD AND WEAK UPPER LOW WILL OPEN UP INTO A WAVE AND EJECT NORTHWARD THROUGH KS/NEB TONIGHT AND WEDNESDAY. HAVE DECREASED POPS AND LIMITED EXTENT TO EASTERN CWA AHEAD OF THE UPPER TROUGH. (WEDNESDAY NIGHT THROUGH TUESDAY) ISSUED AT 311 PM CDT TUE APR 14 2015 BY WEDNESDAY EVENING THE WESTERN CONUS UPPER LOW IS FORECAST TO DROP NEAR THE FOUR CORNERS REGION AND IS EXPECTED TO ONLY MOVE SLIGHTLY SOUTH AND EAST BY EARLY IN THE WEEKEND. DUE TO SLIGHTLY SLOWER TIMING OF THE UPPER LOW.
Scattered Rain Showers Through Tomorrow Followed by a Nice Day A weakening upper level low is currently over Oklahoma slowly moving northward. The upper level low will continue to move northward through tomorrow.
EXPECT WINDY CONDITIONS TODAY AS A COLD FRONT APPROACHES FROM THE NORTH.
/ISSUED 1100 AM CDT TUE APR 14 2015/ WEAK COLD FRONT JUST SOUTH OF I-20.
325 PM EDT TUE APR 14 2015 HIGH PRESSURE WILL DRIFT INTO THE GREAT LAKES AND PROVIDE THE REGION WITH FAIR WEATHER AND SEASONABLE TEMPERATURES INTO WEDNESDAY.
RESPLENDENT SUNSHINE ALONG WITH GENTLE TO LIGHT EAST TO SOUTHEAST WINDS HAVE ALLOW TEMPERATURES TO CLIMB INTO THE LOWER AND MID 80S ALONG THE FLORIDA KEYS. A FORMIDABLE WESTERN ATLANTIC RIDGE REMAINS LOCKED IN ACROSS CENTRAL FLORIDA AND WELL INTO THE SOUTH CENTRAL GULF OF MEXICO.
225 PM CDT TUE APR 14 2015 UNSETTLED PATTERN NEXT SEVEN DAYS AS CLOSED UPPER LOW TAKES UP RESIDENCE OVER SOUTHWESTERN U. ITS CLOSED LOW SEASON AND THINGS CAN GET SLUGGISH AND THIS WILL BE THE CASE FOR THE NEXT SEVERAL DAYS. SO HAVE THE HIGHER POPS SOUTHERN AND EASTERN AREAS INCLUDING PLATEAU. LITTLE COOLER TEMPS TONIGHT SINCE MID STATE WILL BE NORTH OF FRONTAL BOUNDARY.
The cold Pacific trough will continue to track across the Northern Rockies tonight through Wednesday morning.
340 PM CDT TUE APR 14 2015 336 PM CDT AN AMPLIFIED PATTERN ALOFT IS NOT BEING HANDLED IN A VERY SIMILAR MANNER BY THE VARIOUS DETERMINISTIC MODELS BUT ALL HAVE A BASIC AGREEMENT IN DIGGING A BROAD UPPER LOW INTO THE FOUR CORNERS REGION OVER THE NEXT TWO DAYS. DOWNSTREAM RIDGING WILL SUPPORT CONTINUED MILD TEMPERATURES AND RELATIVELY LIGHT WINDS LOCALLY. THE DOMINANCE OF THE RIDGE TONIGHT AND TOMORROW WILL KEEP THE AREA DRY.
TEMPS WILL LIKELY NOT FALL TO THE COLD VALUES OF YDAY DUE TO THE HIGHER WIND SPEEDS AND INCREASINGLY EXPANSIVE CIRRUS BY LATE TONIGHT. WHICH WILL LIKELY RESULT IN HIGH TEMPS 5-10 DEGREES COOLER THAN TODAY.
ISSUED BY NATIONAL WEATHER SERVICE CHICAGO IL 305 PM CDT TUE APR 14 2015 HIGH PRESSURE REMAINS CENTERED OVER SOUTHERN LAKE MICHIGAN THIS AFTERNOON. THIS PLACES MUCH OF CENTRAL/SOUTHERN IL WITHIN THE SOUTHERN PERIPHERY OF THE RIDGE AND IN MAINLY EASTERLY FLOW. HAVE NOT MADE TOO MANY CHANGES TO GOING LOW CHANCE POPS WEDNESDAY NIGHT WITH THE HIGHEST POPS ACROSS THE SOUTHERN AND EASTERN PORTIONS OF THE CWA.
344 PM CDT TUE APR 14 2015 Cloud cover has been extensive and persistent across our area today, as a result low-level moisture wrapping around the departing upper trough. With low- level thermal ridge developing to our west, a strong temperature rebound is expected and should have afternoon highs in the lower 80s across much of our area. (Wednesday night through Tuesday) An upper trough moving through the Central Rocky Mountains is expected to slow down and cut off over the Southwest US this week.
148 PM EDT TUE APR 14 2015 AN AREA OF HIGH PRESSURE WITH QUIET.
A COLD FRONT WILL BEGIN TO MAKE AN APPROACH FROM THE NORTHWEST WEDNESDAY AFTN. HIGH TEMPERATURES WILL BE SLIGHTLY COOLER WITH ADDITIONAL CLOUDS/PRECIP.
A WEAK RIDGE OF HIGH PRESSURE WILL MOVE EAST OF THE AREA WITH STRONG SOUTHERLY WINDS EXPECTED TO DEVELOP TODAY.
SCATTERED SHOWERS AND A PUGET SOUND CONVERGENCE ZONE WILL WEAKEN THIS EVENING AS AN UPPER LEVEL TROUGH OVER THE AREA MOVES EAST.
353 PM CDT Tue Apr 14 2015 Broad open upper trough was centered over southwestern Oklahoma this afternoon. The slower progression of the moisture return has lead to skies being mostly sunny, warmer temps near 70 degrees, and slightly stronger easterly winds at 10 to 15 mph sustained. Low level saturation may be difficult to achieve initially and with the slower track of the wave, have centered the highest chances east of highway 75 from 10 PM through sunrise. Over north central Kansas, lows are cooler in the 40s where conditions remain dry. Eastern areas where thicker cloud cover resides, highs in the lower 60s are likely, while further west temps are in the upper 60s.
535 PM MDT MON MAY 2 2016 UPPER LOW CURRENTLY ALONG THE NORTH DAKOTA/SOUTH DAKOTA BORDER WILL DROP SOUTH ACROSS SOUTH DAKOTA AND NEBRASKA OVERNIGHT. NEXT COUPLE DAYS WILL SEE DRY CONDITIONS ALONG WITH WARMING TEMPERATURES AS UPPER RIDGING BUILDS OVER THE REGION.
UPPER LEVEL TROUGH AXIS STILL RESIDES UPSTREAM. LOW CLOUDINESS TO REMAIN THROUGH MUCH OF THE TAF PD AS AN UPPER LEVEL TROUGH AXIS WILL REMAIN UPSTREAM.
STRONG TO SEVERE THUNDERSTORMS WILL LIKELY DEVELOP TUESDAY AFTERNOON AND EVENING AS UPPER TROUGH AND COLD FRONT APPROACH FROM THE WEST. SOUTH WINDS WILL BECOME SW TUESDAY AHEAD OF A SLOW MOVING COLD FRONT.
HIGH PRESSURE ACROSS THE REGION WILL START TO SHIFT EASTWARD AS A COLD FRONT CONTINUES TO MOVE INTO THE SOUTHEASTERN STATES TONIGHT. /ISSUED 346 PM EDT MON MAY 2 2016/ HIGH PRESSURE LOCATED OVER THE WESTERN ATLANTIC WATERS WILL WEAKEN TONIGHT. AS A TROUGH OF LOW PRESSURE OVER THE CENTRAL UNITED STATES MOVES EAST INTO THE EASTERN UNITED STATES MIDDLE OF THE WEEK. THIS WILL ALLOW FOR LOW PRESSURE TO DEVELOP OVER THE CAROLINA COAST AND MOVE NORTHEAST INTO THE MID ATLANTIC STATES PUSHING A COLD FRONT SOUTHWARD INTO SOUTH FLORIDA FROM THE TENNESSEE VALLEY.
COOL UPPER LOW MOVING THROUGH THE REGION MONDAY AFTERNOON WILL EXIT THE AREA TONIGHT. THE IMPACT FOR THE JAMES RIVER VALLEY WILL BE A BACK DOOR COLD FRONT THAT WILL BRING GUSTY NORTH WINDS OF 20 TO 30 MPH TO THE WESTERN DEVILS LAKE AND THE JAMES RIVER VALLEY REGIONS DURING TUESDAY AFTERNOON. RELATIVE HUMIDITY WILL FALL INTO THE LOWER 20 PERCENT RANGE.
AND COULD SEE A FEW AREAS IN THE LOW 40S ACROSS THE SOUTHEAST WHERE WINDS WILL BE LIGHTER. THE H85/H7 COLD FRONT ALOFT AND ASSOCIATED THERMODYNAMIC FORCING COUPLET IS SHARPER THAN YESTERDAY AS WELL. PRECIP WILL NOT RETURN TO THE FORECAST UNTIL THE WEEKEND WHEN THE BAROCLINIC ZONE BETWEEN THE ONTARIO LONG WAVE TROUGH WILL TIE INTO THE ONE GENERATED BY THE SLOWLY ADVANCING WRN CONUS CLOSED LOW. THIS IS A FAIRLY TYPICAL SETUP FOR WARM SEASON MCS PRODUCTION AS THE FRONTAL BOUNDARY SETTLES INTO THE TOP OF THE UPPER LEVEL RIDGE. LARGE SCALE FORCING LOOKS TO BE MOVING THROUGH THE MO VALLEY WITH THE WARM FRONT SOMEWHERE IN THE VICINITY OF SWRN IA. A FEW ISOLATED SHOWERS WILL BE POSSIBLE ON MONDAY EVENING AS A TROF AXIS CROSSES THE STATE.
922 PM MDT MON MAY 2 2016 AN AMPLIFIED UPPER RIDGE LOCKED IN OVER WESTERN MONTANA.
SWELLS ARE ALSO PERSISTENTLY RUNNING 10-14SEC AT THE BUOY 42020 SO WILL ALSO EXTEND THE HIGH RIP CURRENT RISK AS WELL. BREEZY NORTH WIND CONTINUES IN WAKE OF COLD FRONT THAT MOVED THROUGH THE REGION THIS MORNING. HIGH PRESSURE WILL SETTLE FURTHER SOUTH OVERNIGHT. LIGHTER WINDS TOMORROW NIGHT ALONG WITH MOSTLY CLEAR SKIES WILL ALLOW FOR RELATIVELY CHILLY LOW TEMPERATURES IN THE LOW/MID 50S INLAND AND UPPER 50S/LOW 60S ALONG THE COAST AND RIO GRANDE PLAINS.
HIGH PRESSURE ACROSS THE REGION WILL START TO SHIFT EASTWARD AS A COLD FRONT CONTINUES TO MOVE INTO THE SOUTHEASTERN STATES TONIGHT.
715 PM EDT MON MAY 2 2016 WEAK HIGH PRESSURE WILL BUILD OVER THE REGION TONIGHT AND TUESDAY. A COLD FRONT WILL APPROACH THE REGION TUESDAY NIGHT.
916 PM EDT MON MAY 2 2016 WEAK HIGH PRESSURE WILL BUILD OVER THE REGION TONIGHT AND TUESDAY. A COLD FRONT WILL APPROACH THE REGION TUESDAY NIGHT.
SHORTLY BEHIND COLD FRONT. /ISSUED 641 PM CDT MON MAY 2 2016/ LIGHT AND VARIABLE SURFACE WINDS EXPECTED OVERNIGHT WITH DIRECTION TRENDING TO WEST BY DAYBREAK AS WEAK HIGH PRESSURE RIDGE DEPARTS TO THE EAST. COLD FRONT PASSES NORTHERN TERMINALS BETWEEN 12Z AND 15Z TUESDAY. COLD FRONT REACHES KAMA AROUND 17Z TUESDAY. POTENTIAL EXISTS FOR ISOLATED THUNDERSTORMS NEAR KAMA AFTER 19Z AS VORTICITY MAXIMUM ARRIVES DURING THE WARMER PART OF THE DAY. THE REMNANTS OF THE LAST UPPER-LEVEL LOW PRESSURE SYSTEM ARE CURRENTLY BECOMING ABSORBED INTO A BROAD TROUGH OVER THE EASTERN CONUS WHILE A RIDGE OF HIGH PRESSURE ESTABLISHES ITSELF OVER THE ROCKIES.
906 PM PDT MON MAY 2 2016 DRY AND SLIGHTLY WARMER ON TUESDAY UNDER WEAK HIGH PRESSURE ALOFT.
641 PM CDT MON MAY 2 2016 LIGHT AND VARIABLE SURFACE WINDS EXPECTED OVERNIGHT WITH DIRECTION TRENDING TO WEST BY DAYBREAK AS WEAK HIGH PRESSURE RIDGE DEPARTS TO THE EAST. COLD FRONT PASSES NORTHERN TERMINALS BETWEEN 12Z AND 15Z TUESDAY. COLD FRONT REACHES KAMA AROUND 17Z TUESDAY. POTENTIAL EXISTS FOR ISOLATED THUNDERSTORMS NEAR KAMA AFTER 19Z AS VORTICITY MAXIMUM ARRIVES DURING THE WARMER PART OF THE DAY. THE REMNANTS OF THE LAST UPPER-LEVEL LOW PRESSURE SYSTEM ARE CURRENTLY BECOMING ABSORBED INTO A BROAD TROUGH OVER THE EASTERN CONUS WHILE A RIDGE OF HIGH PRESSURE ESTABLISHES ITSELF OVER THE ROCKIES.
548 AM CST Thu Dec 8 2016 /12Z TAFS/ Mainly MVFR stratus expected across West Central Texas terminals into mid afternoon, although KSJT may briefly fall to IFR mid morning as a band of light snow/freezing rain and sleet moves through. With temperatures falling into the upper 20s in this region this morning, bridges and overpasses could become slick and icy. Light snow may mix in with the freezing rain later this morning as colder air aloft brings the atmosphere column below freezing. The City of San Angelo will likely fall to freezing around 9 AM and stay in the 30 to 32 range through the day, so no significant problems should occur. Lows in the lower 20s are expected tonight as skies clear and winds become light.
520 AM CST Thu Dec 8 2016 Arctic high pressure continues to build southeast across the area this morning with a modest surface gradient keeping winds around 10-15kts with gusts still in the 20-25kt range. A few low clouds continue to drift along and east of the Missouri River and a few flurries were reported under these but should continue to drift east as dry high pressure continues to build overhead. The high pressure ridge will extend over the CWA by 12Z Friday with overnight lows tonight close to zero in many areas. Wind chill values through the day will likely be around 10-15 with highs in the lower 20s.
Temperatures will be on the cooler side today with all the cloud cover and being on the north side of the front. A tightening gradient between a frontal boundary over southern Florida and strong high pressure over the central U.
952 AM EST Thu Dec 8 2016 Surface analysis shows area of center of high pressure is currently parked across the Central Plains and we are currently stuck in between. Radar returns have diminished across the area, and most of the higher based cumulus is starting to scatter out. Aloft, a deep trough remains poised across the CONUS, with an upper level low moving eastward into Quebec, with a short wave trough moving across the Midwest. Current temperatures are in the low 30s, with some upper 20s invading from far northern Kentucky. We start the period with high pressure in control at the surface.
Northerly winds 8-10 mph this afternoon will keep temperatures near seasonal levels in the lower to mid 70s north to upper 70s far srn sections. N/NW winds up to 10-15 knots today will increase further into tonight as a stronger cold front begins to move through the region.
836 AM EST Thu Dec 8 2016 A cold front will move through the forecast area today.
1000 AM EST Thu Dec 8 2016 An arctic cold front will move through the area today. The expansive arctic high pressure will dominate the eastern two- thirds of the country Friday and right on through the weekend.
Early this morning temperatures continued to fall with all locations now below freezing and a few locations in northwest Oklahoma already in the mid teens.
Large upper level trof covers much of Canada and the United States, with strong jet stretching from the Southern Plains to the northeast US. Cloud cover will be on the increase on Friday, as warmer air begins to move in aloft, and a weak impulse lifts through the Northern Plains.
A warm front associated with a weather system over northern California continues to push north toward our CWA.
943 AM EST Thu Dec 8 2016 Cold front moves through the Mid-Atlantic today. High pressure returns to the area Friday into the weekend.
The upper level trough will swing east through the eastern seaboard through Friday, helping to push a surface cold front through the Florida peninsula. Temperatures will continue to cool off today as the front works into the area, with highs this afternoon expected to be roughly 5 degrees cooler than yesterday. Lows tonight will see similar drop offs, but Friday afternoon is forecast to be significantly cooler, with highs only topping out from the upper 50s to mid 60s.
533 AM CST Thu Dec 8 2016 A strong polar high pressure area has settled over the Central High Plains early this morning. High pressure will remain entrenched across the area through tonight allowing much below normal temperatures to persist across the area as well as dangerous wind chills readings falling below zero at times over central KS. As high pressure translates eastward away from the area on Friday, low level southerly winds will allow temperatures to begin to moderate.
Areas from Valdosta south across the eastern Florida Big Bend will see temps 4-5 degrees cooler than yesterday afternoon however.