Aikyam-Lab/Synoptic-Bench huggingface dataset:
H925 WARM ADVECTION ALSO SUPPORTS WARMER THAN GUIDANCE OVERNIGHT LOWS. HOWEVER THE 00Z NAM SHOWS COOLER TEMPS AFT 06Z IN THE WEST. FINALLY LIGHT SOUTHWEST TO WEST WINDS SUPPORT WARMER TEMPS TONIGHT HOWEVER WINDS ARE GOING CALM IN CNTRL ND AND THIS SHOULD TRANSLATE EAST BY MORNING. OVERALL STILL A FEW DEG WARMER THAN GUIDANCE TONIGHT. MONDAY WILL SEE 925 MB TEMPS A GOOD 5-7C HIGHER THAN TODAY AND AS LONG AS SFC WINDS REMAIN MORE SOUTHWEST THAN IT WILL BE QUITE MILD WITH HIGH TEMPS IN THE LOW TO MID 50S IN CENTRAL AND SOUTHERN RRV. NOTICED SNOW EATING ON THE VSBL SAT PIC THIS AFTN IN THE KITTSON-W MARSHALL COUNTY AREA AND ALSO SOME DIMINISHING IN THE SNOW PACK AROUND LANGDON WHERE THE AMOUNTS ARE THE HIGHEST.
At present, a weak frontal boundary extends across the northern part of the forecast area, and this should settle southward this evening as a weak area of high pressure builds east across northern Illinois and Indiana. Most of the higher resolution models keep the winds up slightly overnight, as the axis of the high remains north, with only the NAM showing widespread calm winds developing. High pressure area will slowly move across the region through tomorrow and push east of the area.
Weak high pressure between those two features will provide relatively clear skies the rest of the night in central IL. Light winds under the high pressure could help radiational cooling and lingering moisture result in light fog formation. At present, a weak frontal boundary extends across the northern part of the forecast area, and this should settle southward this evening as a weak area of high pressure builds east across northern Illinois and Indiana. Most of the higher resolution models keep the winds up slightly overnight, as the axis of the high remains north, with only the NAM showing widespread calm winds developing. High pressure area will slowly move across the region through tomorrow and push east of the area.
WV IMAGERY AND 00Z UPPER AIR ANALYSIS INDICATE A BROAD UPPER LEVEL TROUGH OF LOW PRESSURE MOVING SLOWLY EAST ACROSS THE DESERT SOUTHWEST. A COLD FRONT HAD MOVED INTO CENTRAL AND SOUTHWEST KANSAS THIS MORNING AND BY EARLY AFTERNOON EXTENDED ROUGHLY FROM LACROSSE THROUGH JETMORE AND HUGOTON. IN SPITE OF SOME COLD ADVECTION BEHIND THE FRONT, TEMPERATURES HAVE CLIMBED INTO THE LOWER TO MIDDLE 60S WITH STRONG DAYTIME HEATING. ON MONDAY, SKIES SHOULD BE PARTLY TO MOSTLY SUNNY AS A BROAD WEAK UPPER TROUGH PASSES OVER THE REGION. TEMPERATURES SHOULD CLIMB BACK INTO THE LOWER 60S AS LIGHT EASTERLY WINDS BECOME SOUTHERLY.
MONDAY WILL SEE 925 MB TEMPS A GOOD 5-7C HIGHER THAN TODAY AND AS LONG AS SFC WINDS REMAIN MORE SOUTHWEST THAN IT WILL BE QUITE MILD WITH HIGH TEMPS IN THE LOW TO MID 50S IN CENTRAL AND SOUTHERN RRV. NOTICED SNOW EATING ON THE VSBL SAT PIC THIS AFTN IN THE KITTSON-W MARSHALL COUNTY AREA AND ALSO SOME DIMINISHING IN THE SNOW PACK AROUND LANGDON WHERE THE AMOUNTS ARE THE HIGHEST.
A WEAK FRONTAL SYSTEM WILL BRING COOLER WEATHER TO THE REGION BY MID WEEK. WELL ABOVE NORMAL TEMPERATURES WILL RETURN LATE IN THE WEEK AS HIGH PRESSURE BUILDS AND OFFSHORE FLOW DEVELOPS. A COOLER AIR MASS WITH A SHALLOW MARINE LAYER WILL LINGER INTO MONDAY.
AN UPPER RIDGE OVER CALIFORNIA WILL BREAK DOWN BY MID WEEK WITH A CHANCE OF SHOWERS FOR AREAS NORTH OF POINT CONCEPTION. HIGHS WERE INDEED DOWN TODAY FROM YESTERDAY, AS MUCH AS 24 DEGREES COOLER IN OXNARD, BUT GENERALLY DOWN 10-15 FOR THE COAST AND 5-10 FOR THE VALLEYS.
830 PM MDT SUN MAR 8 2015 THERE IS A BATCH OF CLOUDINESS OVER THE SOUTHERN CWA RIGHT NOW ASSOCIATED WITH A WEAK UPPER TROUGH. DRIER AND MORE SUBSIDENT AIRMASS WILL WORK INTO COLORADO ON MONDAY WITH DRY AND SLIGHTLY WARMER CONDITIONS.
BANKING ON THE 12Z NAM TO BE OVERDONE WITH THE LOW LEVEL MOISTURE. WITH AFTERNOON DEW PTS IN THE LOW TO MID 20S. 00Z EURO MOS GUIDANCE PREDOMINATELY IN THE LOWER 20S SEEMS LIKE A GOOD TARGET FOR MINS ACROSS MOST AREAS.
HIGH PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER PATTERN SO VERY LITTLE CHANGE OTHER THAN SLIGHTLY WARMER TEMPERATURES OVERNIGHT AND MONDAY. HIGH TEMPERATURES MONDAY LOOK TO BE 2 TO 5 DEGREES WARMER WHICH WILL PLACE SOME AREAS IN THE NEAR RECORD CATEGORY SO HAVE HEADLINED THOSE ZONES IN THE EVENING FORECAST UPDATE.
ONLY CAVEAT TO MENTION WOULD BE THE LOW CHANCE OF FOG ACROSS THE INTERIOR. HI PRES RIDGE AXIS PUSHING OFF THE SERN SEABOARD WILL GENERATE A GENTLE TO MODERATE ERLY BREEZE ACRS THE LCL ATLC.
THIS EVENING THROUGH MONDAY NIGHT WATER VAPOR SHOWS UPPER RIDGE OVER THE PAC NW WITH DRY NW FLOW ACROSS THE NRN ROCKIES/NRN PLAINS. A SLIGHT INCREASE IN THICKNESSES WILL RESULT IN WARMER TEMPS FOR MONDAY.
KBYX DOPPLER RADAR SHOWS VERY WEAK ECHOES JUST NORTH OF THE LOWER AND MIDDLE KEYS. PRECIPITABLE WATER IMAGERY SHOWS SLIGHTLY DRIER AIR IS SIFTING IN THROUGH THE SOUTHERN HALF OF OUR SERVICE AREA ON THE LOWER LEVEL EASTERLY FLOW. THE HIGH TEMPERATURE AT THE KEY WEST INTERNATIONAL AIRPORT WAS 86 DEGREES.
756 PM EDT SUN MAR 8 2015 A WEAK UPPER LOW GOING NORTH OF THE AREA OVERNIGHT WILL BRING A FEW SNOW SHOWERS OR FLURRIES TO THE AREA.
MSAS ANALYSIS AND AREA OBS DEPICT A STATIONARY FRONT EXTENDING FROM THE LOWER TEXAS COAST NORTHWARD TO JUST EAST OF PORT ARANSAS AND THEN EXTENDING EASTWARD INTO THE WESTERN GULF OF MEXICO. AREA OF LOW PRESSURE WILL SLOWLY RIDE NE ALONG THE COAST OR JUST INLAND DURING THE MORNING. A LULL IN PRECIP MAY OCCUR AROUND MIDDAY BEFORE A MORE ORGANIZED BROKEN LINE OF CONVECTION DEVELOPS IN THE AFTERNOON AS WEAKENING MID LEVEL TROUGH AXIS SHIFTS THROUGH.
COLD FRONT IS HAVING A TOUGH TIME MOVING THROUGH THE SOUTHEAST HALF OF THE CWA THIS AFTERNOON. UPPER TROUGH OVER NORTHERN NEW MEXICO IS EXPECTED TO TRACK EAST AND IT SHOULD BE NEAR THE BIG BEND BY MID DAY MONDAY.
WITH WARMER AIR CONTINUING TO MOVE IN. CHATTANOOGA AIRPORT, TN 43 60 48 63 / 30 50 70 80 KNOXVILLE MCGHEE TYSON AIRPORT, TN 44 58 45 61 / 30 30 70 80 OAK RIDGE, TN 44 59 45 60 / 20 30 70 80 TRI CITIES AIRPORT, TN 36 57 42 58 / 20 20 70 80.
1025 PM EDT SUN MAR 8 2015 HIGH PRESSURE WILL PREVAIL ACROSS THE AREA OVERNIGHT THROUGH EARLY MONDAY.
WHILE A LESSER DEGREE OF MIXING WILL HOLD EAST CENTRAL SD INTO SOUTHWEST MINNESOTA IN THE LOW TO MID 50S. WENT WITH THE WARMER BIAS CORRECTED MODELS.
1100 PM MDT SUN MAR 8 2015 SAT IMAGERY CONTINUES TO HAVE LW TROF ACROSS MOST OF THE CONUS EXCEPT FOR THE W CST WHERE AN AMPLIFIED HIGH REMAINS. SFC OBS NOW HAVE COLD FRONT PUSHED SOUTH INTO THE CNTRL PLAINS WITH TRAILING WEAK STATIONARY FRONT DRAPED NWD FROM THE FRONT RANGE OF CO. MONDAY NIGHT THROUGH SUNDAY WARMER HIGH PRESSURE ALOFT WILL BE OVER THE WESTERN U.
THE MAIN TROUGH IS STILL DIGGING OVER FAR W TX AND NORTHERN MEXICO. BUT HAS BEEN TRENDING SOME OF THE HIGHER QPF NORTH OF OUR WATCH IN NE TX FOR TOMORROW EVENING. A WARM FRONT WILL PUSH SLOWLY NORTH ACROSS EASTERN TX ON MONDAY. AND FURTHER AIDED BY INCREASING UPPER LVL SPEED DIVERGENCE AS UPPER TROUGH DIGS WELL SWD INTO MEXICO. IN THE EVENT THAT THE WARM FRONT MAKES IT THAT FAR NORTH. UPPER LOWS TO SET UP OVER SW STATES THRU REST OF PERIOD.
1233 AM EDT MON MAR 9 2015 HIGH PRESSURE WILL BUILD IN THE WAKE OF THIS MORNINGS UPPER DISTURBANCE AND PRODUCE A DRY AND SEASONABLY WARM MONDAY.
ANY ACTIVITY ACROSS THE HIGHER TERRAIN OF EASTERN ARIZONA HAS DIMINISHED EARLY THIS EVENING LEAVING GENERALLY CLEAR SKIES AREAWIDE. MUCH LIKE TODAY THERE COULD BE SOME CU DEVELOPMENT IN THE HIGHER TERRAIN LOCATIONS EAST OF PHOENIX AND MAYBE EVEN A QUICK SPRINKLE.
LIGHT SNOW SHOWERS ARE CROSSING THE FORECAST AREA AS THE TROUGH ASSOCIATED WITH THE CLIPPER IS PUSHING INTO N LAKE MICHIGAN. THE WEST TO SOUTHWEST WINDS EXPECTED OVERNIGHT AS THE HIGH BUILDS INTO THE REGION, AGAIN GET THE RETURN FLOW GOING SO THAT THE TEMPERATURES STABILIZE OVERNIGHT FROM THE WARM ADVECTION. WARMER WEATHER IS UPON US. LONG WAVE PATTERN AROUND THE NRN HEMISPHERE TODAY FEATURES A 4-WAVE CONFIGURATION WITH TWO ANCHORING TROUGHS OVER EAST ASIA AND EASTERN CANADA/GREAT LAKES AND NEW ENGLAND RESPECTIVELY. RIDGING/WARM AIR STILL PERSISTS ACROSS WESTERN NOAM ALTHOUGH MAGNITUDE OF RIDGING HAS BEEN STEADILY DIMINISHING OVER THE LAST FEW DAYS. MUCH ANTICIPATED PATTERN SHIFT STILL ON TRACK THIS WEEK AS MORE ENERGETIC AND BUCKLING CENTRAL AND EASTERN PACIFIC FLOW ACTS TO FINALLY DISLODGE THAT STUBBORN RIDGE ALONG THE WEST COAST AND SPREAD WARMER AIR BACK ACROSS THE LOWER 48 STATES.
1147 PM EDT FRI APR 10 2015 A COLD FRONT SHIFTS ACROSS THE VIRGINIA TIDEWATER TONIGHT. HIGH PRESSURE WILL PROVIDE DRIER WEATHER OVER THE WEEKEND.
OTHERWISE WE WILL BE DRY TONIGHT UNDER FLAT UPPER RIDGING. TOMORROW IS EXPECTED TO BE WARM AHEAD OF AN APPROACHING COLD FRONT. LATEST MODELS HAVE CONTINUED THE TREND WITH A LATER COLD FRONTAL PASSAGE.
A secondary cold front currently moving into far northern MO will move south through the region as the short wave now stretching thru eastern IA rotates to the east/southeast across the lower Great Lakes. Temps will be cooler in the wake of the front as high pressure settles from Iowa into southern Illinois.
HOWEVER, PRECIPITATION AMOUNTS WERE INCREASED ALONG THE COAST, IN THE UMPQUA BASIN, AND ALONG THE CASCADE CREST, WHICH BROUGHT THE FORECAST MORE TOWARDS THE HIGHER RESOLUTION MODELS. THE SYSTEM WILL EXIT TOMORROW AFTERNOON, LEAVING THE AREA UNDER HIGH PRESSURE FOR THE REMAINDER OF THE WEEKEND. CLOUDS WILL GRADUALLY INCREASE AHEAD OF A COLD FRONT THAT WILL MOVE THROUGH TONIGHT THROUGH SATURDAY. A COLD FRONT WILL BRING MODERATE RAIN. HIGH PRESSURE WILL RETURN THIS WEEKEND WITH BUILDING NORTHWEST SWELL AND ALSO MODERATE NORTH WINDS IN THE OUTER WATERS SOUTH OF CAPE BLANCO.
A SURFACE COLD FRONT WAS NEAR A LINE FROM MONTGOMERY TO ALEXANDER CITY LATE THIS EVENING. INCREASED CLOUD COVER SOMEWHAT NORTH BASED ON SOME HIGHER CLOUDS BUT THE TREND IN DECREASING NORTH REMAINS AND COOLER BY THE MORNING. SHOWERS AND THUNDERSTORMS LINGERING AT TOI THIS EVENING WITH THE COLD FRONT RIGHT ACROSS CENTRAL ALABAMA. LOCATIONS TO THE NORTH ARE SEEING THE DRIER AIR MOVE IN AND HAS ERODED THE LOWER LEVEL CEILINGS. 88 /ISSUED 324 PM CDT FRI APR 10 2015/ SURFACE ANALYSIS AT MID-AFTERNOON SHOWED THE COLD FRONT HAD MADE IT TO AROUND INTERSTATE 20. AND DRIER AND SLIGHTLY COOLER CONDITIONS ARE FORECAST FOR SATURDAY AND SATURDAY NIGHT.
ADDITIONAL SHOWERS ARE DECREASING ALONG A PRE-FRONTAL TROUGH AS THEY CLIP INTERIOR SE GA. THINK THE ACTIVITY ASSOCIATED WITH THE PRE-FRONTAL TROUGH TO THE NORTHWEST WILL PERSIST LONGER LIKELY CONTINUING FOR MOST OF THE OVERNIGHT.
CONSENSUS MODEL SOLUTIONS IN GENERALLY GOOD AGREEMENT WITH HIGH PRESSURE INFLUENCES SFC/ALOFT THE MAIN WX PLAYER THRU SUN AFTERNOON. WITH UPPER LEVEL RIDGING BUILDING IN SAT NIGHT INTO SUN. SFC COLD FRONTAL PASSAGES ARE EXPECTED MON NIGHT AND AGAIN DURING THE MORNING HRS ON FRI.
THE HIGH PRESSURE SYSTEM WILL MOVE INTO THE OHIO AND GREAT LAKE STATES BY SAT AFTERNOON. WATER VAPOR LOOP INDICATED A N UPPER LEVEL RIDGE OVER CENTRAL CANADA. UPPER RIDGE WILL MOVE OVER THE AREA TONIGHT. THIS HIGH WILL MOVE EAST TONIGHT WITH LIGHT WINDS AND SKIES WILL REMAIN CLEAR. LOWS WILL DROP OFF INTO THE LOWER 30S IN MANY AREAS. COLD FRONT TO MOVE THRU ERN ND SUN MORNING AND INTO NW/WCNTRL MN SUN MIDDAY-AFTN.
UPPER LEVEL TROUGH AND COLD FRONT APPROACHING THE WASHINGTON COAST THIS EVENING. THERE ARE VIRGA SHOWERS AHEAD OF THE TROUGH ACROSS BAKER AND MALHEUR COUNTIES THIS EVENING. CLOUDS WILL CONTINUE TO INCREASE AHEAD OF THE UPPER TROUGH OVERNIGHT.
639 PM CDT Fri Apr 10 2015 A secondary cold front currently pushing into the Illinois River Valley will quickly swing through the area late this afternoon, causing winds to veer to the W/NW and increase markedly. High pressure will build into the region overnight and will be centered directly over central Illinois by 12z. Due to the clear skies and diminishing winds, overnight lows will dip into the middle to upper 30s across much of the area, but will remain a bit warmer around 40 degrees south of I-70.
TROUGH AXIS WILL STEADLY PIVOT EAST THIS EVENING. BUT WITH HIGH PRESSURE SLIDING EAST BY SAT AFTN/EVE. TEMPS SAT WILL PUSH INTO THE LOW 60S. LIKELY HOLDING IN THE LOW/MID 50S CLOSER TO LAKE MICHIGAN. BEACHLER 238 PM CDT SFC RIDGING SHOULD LINGER SAT NGT/EARLY SUN. 500MB TROUGH ACROSS THE EASTERN PACIFIC WILL PUSH EAST TOWARDS THE ROCKIES. LLVL MOISTURE ALONG THE WESTERN PERIPHERY OF THE RIDGE WILL INCREASE AND STREAM NORTH FROM THE WESTERN GULF EARLY SUN. A TROUGH AXIS WILL BE PIVOTING EAST ACROSS THE WESTERN GREAT LAKES. THEN LATER IN THE WEEK ANOTHER TROUGH DIGS INTO THE CENTRAL PLAINS. ANOTHER COLD FRONT IS CURRENTLY SHIFTING OVER THE EASTERN TERMINALS AND THIS IS RESULTING IN MORE OF A NORTHWESTERLY WIND.
/ISSUED 417 PM CDT FRI APR 10 2015/ THE COLD FRONT HAS PUSHED OFF THE SE TX COAST AS OF 20Z. AND THIS FARTHER SWD POSITION SHOULD RESULT IN A SLIGHTLY SLOWER RETURN OF MOISTURE AS IT BEGINS TO WORK BACK N AS A WARM FRONT SATURDAY. PREFER THE GFS HANDLING OF THE SLOWER NWD RETURN OF THE WARM FRONT SATURDAY.
DRY CONDITIONS EXPECTED AREAWIDE BY LATE IN THE DAY SATURDAY THROUGH SATURDAY NIGHT AS RELATIVE DRY HIGH PRESSURE BUILDS INTO THE STATE.
A warm front will also cross the area tonight, with southeasterly surface winds developing, which will increase low-level moisture across west Central Texas. As the warm front approaches, a few showers and thunderstorms may develop along it.
WATER VAPOR LOOP INDICATED A N UPPER LEVEL RIDGE OVER CENTRAL CANADA. UPPER RIDGE WILL MOVE OVER THE AREA TONIGHT. THIS HIGH WILL MOVE EAST TONIGHT WITH LIGHT WINDS AND SKIES WILL REMAIN CLEAR. LOWS WILL DROP OFF INTO THE LOWER 30S IN MANY AREAS. COLD FRONT TO MOVE THRU ERN ND SUN MORNING AND INTO NW/WCNTRL MN SUN MIDDAY-AFTN.
923 PM CDT FRI APR 10 2015 VERY QUIET TONIGHT ACROSS THE FORECAST AREA WITH RIDGE OVER THE REGION. MOS GUIDANCE IS A LITTLE COOLER BUT I USED THAT PATTERN AND ADJUSTED UP SLIGHTLY. SATURDAY TO BE A LOVELY DAY WITH THE RIDGE SLIDING OFF TO THE SOUTHEAST ALLOWING WARM SOUTH FLOW TO DEVELOP OVER THE AREA. MIXING DEPTHS SUPPORT HIGHS IN THE LOWER TO MIDDLE 60S. THOUGH THE NORTH SHORE TO BE COOLER WITH THE ONSHORE FLOW OFF LAKE SUPERIOR.
Surface winds will continue to diminish and become light due to surface ridging over the forecast area. A secondary cold front currently moving into far northern MO will move south through the region as the short wave now stretching thru eastern IA rotates to the east/southeast across the lower Great Lakes. Temps will be cooler in the wake of the front as high pressure settles from Iowa into southern Illinois.
AN UPPER LEVEL TROUGH WELL OFF THE SOUTHERN CALIFORNIA COAST WILL MOVE SOUTHEAST TOWARD BAJA THROUGH SATURDAY NIGHT. WITH WEST- SOUTHWEST MID LEVEL FLOW ACROSS THE ROCKIES AHEAD OF THIS FEATURE, LEE TROUGHING AND MOISTURE RETURN HAVE ALREADY COMMENCED. DEWPOINTS HAVE RECOVERED TO THE LOWER 50S AT EL PASO AND FORT STOCKTON, TX THIS AFTERNOON, A MERE 400-550 MILES AWAY FROM SOUTHWESTERN KANSAS. LOWS TONIGHT WILL BE WARMER GIVEN THE SOUTH WINDS, WITH LOWS IN THE 40S.
HIGH PRESSURE IS SLIDING BY TO THE SOUTH WITH THE RIDGE AXIS LINING UP OVER WESTERN WISCONSIN BY 12Z SAT. WINDS WILL GRADUALLY BACK FROM WEST TO SOUTH SOUTHWEST DURING THE TAF PERIOD AS HIGH PRESSURE DRIFTS BY TO THE SOUTH AND EAST. HIGH UPPER LEVEL TROUGH AXIS PASSES EAST OF THE AREA TONIGHT AS JET LEVEL WINDS WEAKEN AND VEER NORTHWESTERLY. HIGH MID-LEVEL HEIGHTS CONTINUE RISING SATURDAY MORNING AS RIDGING ALOFT PREVAILS. THIS WILL SUPPORT SURFACE RIDGING OVER THE CWA AS HIGH PRESSURE MIGRATES FROM EASTERN IOWA INTO CENTRAL ILLINOIS. WESTERLY WINDS SATURDAY MORNING WILL BACK SOUTHERLY BY EVENING AS UPSTREAM TROUGHING ADVANCES INTO THE CENTRAL PLAINS. READINGS WILL BE A BIT COOLER ALONG THE LAKESHORE.
SURFACE ANALYSIS THIS EVENING PLACES A COLD FRONT ACROSS PORTIONS OF THE MID-ATLANTIC STATES. HIGH PRESSURE IS LOCATED ACROSS THE MID SOUTH THIS EVENING. WATER VAPOR SATELLITE/INFRARED SATELLITE TRENDS STILL SHOW SOME HIGH CLOUDS LINGERING ACROSS AREAS MAINLY SOUTH OF I-40 ACROSS NORTH MISSISSIPPI AND WEST TENNESSEE ASSOCIATED WITH LAST NIGHT/S COLD FRONT. /ISSUED 301 PM CDT FRI APR 10 2015/ HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE MIDSOUTH TONIGHT INTO SATURDAY. LIGHT NORTHERLY WINDS WILL USHER IN COOLER AIR INTO THE AREA. HIGHS ON SATURDAY WILL BE IN THE LOWER TO MID 70S. HIGH PRESSURE WILL SHIFT EAST.
A RIDGE OF HIGH PRESSURE WILL MAINTAIN DRY AND MILD WEATHER THROUGH THE WEEKEND.
1023 PM EDT FRI APR 10 2015 A COLD FRONTAL MOVES THROUGH THE REGION THIS EVENING. HIGH PRESSURE WILL BUILD IN ON SATURDAY.
745 PM PDT FRI APR 10 2015 A fast moving cold front will move through the region late tonight into Saturday morning. This will result in rain and snow showers, breezy winds and cooler conditions into Saturday.
LINGERING SHOWERS HAVE ENDED ACROSS THE REGION THIS EVENING AS A COLD FRONT EXIT THE AREA. BRINGING IN A DRY AND COOLER AIR MASS. CHATTANOOGA AIRPORT, TN 48 72 52 77 / 10 0 0 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 47 69 46 76 / 10 0 0 0 OAK RIDGE, TN 46 69 47 75 / 10 0 0 0 TRI CITIES AIRPORT, TN 43 65 42 72 / 10 0 0 0.
MOS GUIDANCE IS A LITTLE COOLER BUT I USED THAT PATTERN AND ADJUSTED UP SLIGHTLY. SATURDAY TO BE A LOVELY DAY WITH THE RIDGE SLIDING OFF TO THE SOUTHEAST ALLOWING WARM SOUTH FLOW TO DEVELOP OVER THE AREA. MIXING DEPTHS SUPPORT HIGHS IN THE LOWER TO MIDDLE 60S. THOUGH THE NORTH SHORE TO BE COOLER WITH THE ONSHORE FLOW OFF LAKE SUPERIOR.
814 PM EDT FRI APR 10 2015 A COLD FRONT WILL MOVE EAST OF THE REGION BY LATE THIS EVENING.
SURFACE ANALYSIS SHOWS A WEAK HIGH PRESSURE SYSTEM ACROSS THE AREA. THE LOW LEVEL MOISTURE WILL INCREASE.
1045 PM EDT FRI APR 10 2015 A STRONG COLD FRONT WILL APPROACH FROM THE WEST THIS EVENING AND SWEEP ACROSS THE AREA LATE TONIGHT.
850 PM PDT FRI APR 10 2015 HIGH CLOUDS FROM A LOW PRESSURE TROUGH PASSING BY TO THE SOUTH WILL DRIFT ACROSS SOUTHERN CALIFORNIA TONIGHT AND SATURDAY.
522 PM MDT FRI APR 10 2015 A MOISTURE-STARVED UPPER DISTURBANCE WAS CROSSING WRN CO THIS AFTERNOON BRINGING SOME HIGH CIRRUS CLOUDS TO THE REGION WHILE DAYTIME HEATING AND WEAK INSTABILITY AS GENERATING SOME HIGH- BASED CUMULUS OVER AND NEAR THE HIGHER TERRAIN. SATELLITE WATER VAPOR IMAGES THIS AFTERNOON SHOWED AN UPPER LOW SOUTHWEST OF CA NEAR 130W/30N WHILE AN UPPER TROUGH ALONG THE BRITISH COLUMBIA/PAC NW COAST WAS POISED TO MOVE INLAND. THE UPPER LOW IS EXPECTED TO MOVE OVER SRN CA/NRN BAJA SATURDAY AFTERNOON.
ON SATURDAY WARM ADIABATIC ALLY COMPRESSED FLOW WILL BRING A THERMAL RIDGE INTO WESTERN NORTH DAKOTA. THIS WILL SUPPORT HIGHS IN THE LOW TO MIDDLE 70S.
823 PM EDT FRI APR 10 2015 A COLD FRONT WILL PUSH THROUGH THE MIDDLE ATLANTIC TONIGHT. HIGH PRESSURE WILL BUILD INTO THE AREA FOR THE WEEKEND.
THE WEEKEND TEMPERATURES WILL WARM TO AROUND NORMAL AS HIGH PRESSURE MOVES IN. HIGH PRESSURE WITH WEAK OFFSHORE FLOW WILL BUMP TEMPERATURES TO WELL ABOVE NORMAL. AFTER TODAY'S COOLER CONDITIONS THANKS TO A STRONGER ONSHORE FLOW AND A HEIGHT MINIMUM DUE TO THE TROUGH EXTENSION FROM THE CLOSED LOW TO OUR WEST MOVING TOWARD BAJA. WE WARM UP TOMORROW DUE TO WEAK RIDGING. WITH THE CLOSED LOW FINALLY MOVING SOUTH OVER BAJA LATE SATURDAY.
604 PM CDT FRI APR 10 2015 WARMER TEMPERATURES AND INCREASING LOW LEVEL MOISTURE WILL RETURN TO THE REGION TONIGHT INTO SATURDAY AS HIGH PRESSURE MOVES EAST OF THE AREA INTO THE OHIO VALLEY AND UPPER FLOW BECOMES MORE WESTERLY.
The synoptic pattern early this afternoon features a trough across the northeastern CONUS, with an associated area of low pressure located across southern Canada. A synoptic cold front has pushed east through the Ohio Valley this morning, bringing cooler and drier conditions. The short term period is really just a temperature forecast, as a sprawling area of high pressure will keep the region void of many clouds/precip. As the high builds in tonight, skies will become clear and winds will lighten. There may be a few isolated areas of frost in the typically cooler/sheltered locations, but it shouldn't be widespread enough to warrant a Frost Advisory. With the high passing through on Saturday, turbulent mixing should be rather limited. Therefore, despite the sunshine, temperatures will be cooler as highs climb into the low and mid 60s.
718 PM EDT FRI APR 10 2015 A WEAK TROF WILL BE MOVING ACROSS THE AREA EARLY TONIGHT AND THEN HIGH PRESSURE WILL BUILD IN LATE TONIGHT.
THE MAIN COLD FRONT IS NOW MOVING THROUGH WESTERN WASHINGTON AND NORTHWEST OREGON. THE PERIOD STARTS OFF WITH A POWERFUL UPPER LEVEL LOW AND ASSOCIATED SURFACE CYCLONE MOVING INTO CENTRAL BC.
A RIDGE OF HIGH PRESSURE WILL LEAD TO COMFORTABLE DAYTIME TEMPERATURES THROUGH THE WEEKEND WITH DRY CONDITIONS.
HIGH PRESSURE WILL PRODUCE COUPLE DAYS OF DRY AND SUNNY WEATHER INTO THE WEEKEND.
724 PM EDT FRI APR 10 2015 A COLD FRONT WILL MOVE EAST OF THE REGION BY LATER TODAY AND THIS EVENING.
TEMPS SHOULD BOTTOM OUT IN THE LOW-MID 40S TOWARDS DAWN.
1154 PM EDT FRI APR 10 2015 AVIATION HIGH PRESSURE WILL MOVE IN LATER TONIGHT AND PROVIDE A DRY AND PLEASANT WEEKEND.
803 PM EDT FRI APR 10 2015 A STRONG COLD FRONT WILL APPROACH FROM THE WEST THIS EVENING AND SWEEP ACROSS THE AREA LATE TONIGHT.
949 PM EDT FRI APR 10 2015 A WEAK TROF WILL BE MOVING ACROSS THE AREA EARLY TONIGHT AND THEN HIGH PRESSURE WILL BUILD IN LATE TONIGHT.
THE IDEA OF SOME WEAK SHOWERS MOVING OFF THE MOUNTAINS SOUTH OF DENVER STILL SEEMS POSSIBLE SO I WILL LEAVE THE LOW POPS THAT WE HAVE. A SIMILAR BATCH OF HIGHER CLOUDS WILL MOVE OVER ON SATURDAY BUT THE LOW LEVELS WILL BE EVEN DRIER WITH LOW LEVEL WINDS LIGHT AND TENDING TO STAY SOUTHWESTERLY. STILL SOME ISOLATED POPS OVER THE HIGHER CENTRAL MOUNTAINS LATE IN THE DAY.
AN ASSOCIATED LOW LEVEL TROUGH AXIS WILL PIVOT ACROSS NORTHERN PORTIONS OF OUR FA. BUT WITH TROUGH AXIS SWINGING THROUGH.
THE HIGH WILL YIELD NEAR-SEASONABLE TEMPS AND CLEAR AND RATHER DRY CONDITIONS THROUGH THE FIRST HALF OF THE WEEKEND.
715 PM EDT FRI APR 10 2015 CLOUDS WILL BE DECREASING AS A COLD FRONT EXITS THE AREA. HIGH PRESSURE DRIFTING ACROSS THE OHIO VALLEY WILL KEEP WINDS LIGHT AND SKIES CLEAR TOMORROW.
816 PM EDT FRI APR 10 2015 A COLD FRONT WILL MOVE THROUGH THE REGION TONIGHT. HIGH PRESSURE WILL THEN BUILD EASTWARD AND INTO OUR REGION THROUGH THE WEEKEND.
SLIGHTLY COOLER TEMPERATURES CAN BE EXPECTED TONIGHT AS TEMPERATURES DID NOT CLIMB AS HIGH TODAY. HIGHS TOMORROW WILL BE SLIGHTLY COOLER. TOMORROW NIGHT WILL BE A COUPLE DEGREES WARMER ACROSS THE REGION.
723 PM EDT FRI APR 10 2015 UPPER LOW THAT HAS BEEN IMPACTING THE AREA SINCE THU EVENING HAS MOVED E OF LAKE SUPERIOR THIS AFTERNOON. LOWS TONIGHT COULD GET QUITE COLD OVER THE INTERIOR W AS SKIES CLEAR AND THE RIDGE MOVES IN. SUNNY SKIES AND A WARMER AIRMASS ON SAT WILL ALLOW TEMPS TO RISE INTO THE MID-UPPER 40S E AND 50S ELSEWHERE. A RIDGE ACROSS THE REGION INTO MID WEEK AND ANOTHER TROUGH TOWARD THE AREA BY THU INTO FRI.
Nocturnal showers and a few embedded storms are possible Saturday night as southerly flow returns on the back side of the departing high pressure and the LLJ builds eastward across the Plains. Showers and storms may continue into the morning hours as the LLJ transitions eastward; however, a few breaks of sunshine look possible during the afternoon as storms clear out in advance of an approaching cold front.
624 PM CDT FRI APR 10 2015 FOR 00Z TAFS /ISSUED 304 PM CDT FRI APR 10 2015/ THE 20Z SURFACE ANALYSIS INDICATED THAT THE COLD FRONT WAS NOW THROUGH THE FORECAST AREA. SKIES REMAINED MOSTLY CLOUDY ACROSS THE AREA WITH TEMPS RANGING FROM AROUND 70/LOWER 70S JUST BEHIND THE COLD FRONT. TO THE MID-UPPER 60S BEHIND THE COLD FRONT IN NORTHWEST ALABAMA/SOUTHERN MIDDLE TENNESSEE. EXPECT THAT CLOUDS WILL CONTINUE TO CLEAR AS WE HEAD INTO THE EVENING HOURS AS A BROAD AREA OF HIGH PRESSURE MOVES INTO THE TENNESSEE VALLEY REGION. THE MODELS ARE IN GOOD AGREEMENT INVOLVING MOVING THE AREA OF HIGH PRESSURE ACROSS THE OHIO AND TENNESSEE VALLEY REGION THROUGH THE WEEKEND. THE RIDGE WITH INCREASED LOW LEVEL MOISTURE EXPECTED TO SLOWLY MOVE NORTHWARD TOWARD THE FORECAST AREA.
1206 AM EDT SAT APR 11 2015 A WEAK TROF WILL BE MOVING ACROSS THE AREA EARLY TONIGHT AND THEN HIGH PRESSURE WILL BUILD IN LATE TONIGHT.
THE COLD FRONT HAS SETTLED NEAR OR JUST OFF THE SW LA COAST.