Aikyam-Lab/Synoptic-Bench huggingface dataset:
A LOW PRESSURE CENTER IS LOCATED SOUTH OF THE OHIO RIVER VALLEY. WITH AN INVERTED TROUGH CURRENTLY PROTRUDING TO THE NE AND ACROSS MUCH OF CENTRAL AND EASTERN KY. WEAK LOW PRESSURE WILL THEN SHIFT NEWARD. THE LOW AND TROUGH WILL FINALLY SHIFT EAST OF THE REGION LATE TOMORROW MORNING INTO TOMORROW AFTERNOON. INTENSIFYING CONSIDERABLY BETWEEN A STRONG UPPER LEVEL LOW IN SOUTHERN CANADA. AND RIDGING OVER THE GULF OF MEXICO. THE LOSS OF CLOUD COVER AND HIGH PRESSURE OVERHEAD WILL ALSO CREATE A GOOD OPPORTUNITY FOR RADIATIONAL COOLING TOMORROW NIGHT. MAY WANT TO BE ON THE LOOKOUT FOR MORE OF A RIDGE VALLEY SPLIT THAT WHAT IS IN THE CURRENT FORECAST. THEY ALL AGREE THAT SPLIT FLOW WILL CONTINUE TO DOMINATE THE CONTINENT WITH A DEEP TROUGH IN PLACE NORTH OF THE GREAT LAKES AND A WEAKER ONE THROUGH OLD MEXICO.
A Canadian cold front will be moving south over north central Montana Friday morning but guidance differs greatly on what the wind direction will be after frontal passage.
A RIDGE OF HIGH PRESSURE WILL PROVIDE DRY CONDITIONS AND ABOVE NORMAL TEMPERATURES THROUGH THE WEEKEND.
NAM SHOWS A 500 MB TROUGH ACROSS SOUTH CENTRAL CANADA 12Z FRI. THIS TROUGH DIGS SOUTHEAST FRI NIGHT AND SAT AND ALLOWS COLDER AIR BACK INTO THE AREA. ECMWF AND GFS SHOW A BROAD 500 MB TROUGH OVER THE NORTHEAST U.
MEANWHILE A WEAK 500 MB TROUGH MOVING ACROSS THE REGION WILL PROVIDE SOME MODEST VERTICAL FORCING AND MOISTENING OF THE ATMOSPHERIC COLUMN AS EVIDENCED BY FORECAST SOUNDINGS ACROSS CENTRAL IOWA. FRONTAL PASSAGE INTO FRI NIGHT WILL BEGIN DROPPING TEMPS BACK CLOSER TO NORMAL FOR THE WEEKEND HOWEVER WITH COOLER AND DRIER NELY/ELY FLOW. ATTENTION WILL THEN TURN TO WAVE TOPPING WEAK ROCKIES RIDGE SAT BEFORE DROPPING INTO THE UPPER MO VALLEY SUN. THE 00Z ECMWF IS SLOWER AND WARMER WITH FORCING LINGERING INTO SUN NIGHT. MUCH STRONGER ON QPF AND THUS COOLER WITH RESULTANT TEMPS. LESS CONVECTIVELY DRIVEN AND SUBSEQUENTLY WARMER ECMWF IS THE MORE FAVORED SOLUTION. FLOW WILL STRENGTHEN SOMEWHAT INTO MIDWEEK WITH MORE DEVELOPED MEAN TROUGH.
THIS EVENING THROUGH FRIDAY NIGHT CURRENT SURFACE MAP SHOWS TROF MOVING THROUGH EASTERN DAKOTAS. UPPER RIDGE OVER THE PACIFIC NORTHWEST SHIFTS EASTWARD. BACKDOOR COLD FRONT SLIPS INTO NORTHWEST SOUTH DAKOTA FRIDAY EVENING.
HIGH TEMPERATURES IN THE LOW 50S ACROSS THE FAR WEST AND SOUTH UNDER CLOUD COVER AND PRECIP WITH LOW 60S ACROSS THE NORTHEAST CORNER OF THE AREA WHERE WARMER AIR ALOFT MOVES IN AND CLOUDINESS THINS. HIGHS IN THE MID 60S TO MID 70S (SOUTHWEST TO NORTHEAST ORIENTATION ACROSS THE AREA) WITH OVERNIGHT LOWS IN THE LOW TO MID 30S.
PRECIPITATION CHANCES WILL GRADUALLY DECREASE FROM WEST TO EAST THROUGH FRIDAY AS THE LOW MOVES AWAY FROM ARIZONA AND HIGHER PRESSURE BUILDS INTO THE STATE FROM THE WEST.
Short-range models bring the second round of light precipitation into the forecast area by late morning to early afternoon, then push any lingering precipitation southeast of the region during the late afternoon - early evening hours as the trough passes through.
UPPER LEVEL TROUGH OVER THE AREA WILL MOVE EAST TONIGHT. UPPER LEVEL RIDGE BUILDS IN THE ROCKIES TONIGHT AND FRI AND WILL MOVE ACROSS THE FORECAST AREA BY SUN. WATER VAPOR LOOP INDICATED SOME RIDGE BUILDING OVER THE PACIFIC NORTHWEST AND SOUTHWEST CANADA. ALSO ON WATER VAPOR LOOP AN UPPER LEVEL TROUGH OVER THE NORTHWEST TERRITORIES WILL ROTATE ACROSS MAN AND ONTARIO AND SEND COOLER AIR SOUTH. WENT A LITTLE COOLER FOR FRI NORTH.
115 PM PDT THU MAR 19 2015 WEAK HIGH PRESSURE WILL BUILD OVER SOUTHWEST CALIFORNIA TODAY AND FRIDAY. COOLER AND BREEZY CONDITIONS ARE EXPECTED AS A COUPLE OF LOW PRESSURE SYSTEMS MOVE BY TO THE NORTH. THE UPPER LOW THAT BROUGHT ACTIVE WEATHER TO THE AREA YESTERDAY HAS MOVED SOUTHEAST. OTHERWISE, RIDGING WILL DEVELOP OVER THE AREA FRIDAY FOR WARMER AND MORE STABLE CONDITIONS. THE RIDGE WILL WEAKEN OVER THE WEEKEND AS A LITTLE TROF MOVES INTO THE PAC NW. THIS IN COMBINATION WITH AN INCREASING ONSHORE FLOW WILL BRING COOLER WEATHER ALONG WITH AN EXPANDING MARINE LYR COVERAGE.
127 PM PDT THU MAR 19 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM OVER NORTHERN BAJA MAY BRING A FEW ADDITIONAL SHOWERS AND THUNDERSTORMS THIS AFTERNOON INTO EARLY EVENING.
THE LOW STRATUS FIELD ACROSS WESTERN AND CENTRAL NORTH DAKOTA WILL CONTINUE TO ERODE FROM WEST TO EAST THROUGH THE REMAINDER OF THE AFTERNOON AND EARLY EVENING GIVEN THE LATEST VISIBLE SATELLITE TRENDS AND 16-18 UTC HRRR ITERATIONS. HIGHS IN THE LOWER 60S ARE POSSIBLE. NEAR THE WARMER EDGE OF THE 12 UTC SUITE.
BUT WITH THE WARM ADVECTION ALSO COMES THE RETURN OF THE LOW LEVEL MOISTURE.
TEMPERATURES RANGE FROM NEAR 50 ACROSS OUR FAR NORTHERN AREAS TO THE LOWERS 60S IN THE SOUTH. DUE TO A DEEP UPPER TROUGH OVER THE EASTERN UNITED STATES COOL AIR HAS CIRCULATED OVER OUR AREA. THUS AREAS OF LOW PRESSURE ARE EXPECTED TO TRACK JUST SOUTH OF THE FORECAST AREA THROUGH THE PERIOD. DURING THE DAY FRIDAY HIGH PRESSURE IS EXPECTED TO SUPPRESS MOST OF THE RAINFALL INTO MISSISSIPPI.
WARM FRONT WAS ROUGHLY LOCATED FROM NEAR KTYR. THE WARM FRONT SHOULD CONTINUE TO SLOWLY MOVE NWD THROUGH THE OVERNIGHT HRS. AN UPPER TROUGH CURRENTLY OVER NRN BAJA WILL SLOWLY MOVE EWD INTO THE SRN PLAINS AND EVENTUALLY OVER THE CWA DURING THE WEEKEND.
Rain should begin to end from northwest to southeast during the predawn hours tomorrow, with skies also beginning to clear as the main mid level trough axis pushes through.
126 PM EDT THU MAR 19 2015 LOW PRESSURE WILL MOVE EASTWARD FROM THE CENTRAL GULF STATES THIS MORNING TO THE CAROLINA COAST TONIGHT SPREADING RAIN ACROSS THE AREA THROUGH TONIGHT.
WITH THE HIGHEST POPS OVER EXTREME SOUTH CENTRAL KANSAS WHERE THE BEST CHANCE FOR EXTENDED PERIODS OF LIGHT TO MODERATE RAIN TO EXIST.
WEAK HIGH PRESSURE WILL BUILD OVER SOUTHWEST CALIFORNIA TODAY AND FRIDAY. COOLER AND BREEZY CONDITIONS ARE EXPECTED AS A COUPLE OF LOW PRESSURE SYSTEMS MOVE BY TO THE NORTH. THE UPPER LOW THAT BROUGHT SHOWERS AND THUNDERSTORMS TO THE SOUTHEASTERN PORTION OF OUR FORECAST AREA HAS SHIFTED JUST ENOUGH SOUTH THAT IT SHOULD KEEP MOST, IF NOT ALL THE ACTION OUT OF OUR FORECAST AREA.
311 PM EDT THU MAR 19 2015 HIGH PRESSURE OVER PENNSYLVANIA TODAY WILL PROVIDE FAIR AND DRY WEATHER. LOW PRESSURE WILL TRACK ACROSS THE MID ATLANTIC STATES AND BRING A LATE SEASON SNOWFALL TO THE AREA ON FRIDAY.
primarily along the higher terrain of the Ozark Plateau across southwestern Missouri due to stratus build-down effects. Highs near the Oklahoma border should get into the lower or perhaps middle 50s. Low temperatures tonight will range from the upper 30s across central Missouri to the lower 40s near the Arkansas border.
121 PM EDT THU MAR 19 2015 WINDY AND COLD CONDITIONS WILL CONTINUE THIS MORNING WITH WINDS FINALLY EASING UP THIS AFTERNOON AS HIGH PRESSURE STARTS TO BUILD IN OVERHEAD.
449 PM EDT THU MAR 19 2015 A BROAD AREA OF LOW PRESSURE WILL MOVE THROUGH KENTUCKY TONIGHT.
HIGH PRESSURE ALOFT WILL BUILD INTO THE GREAT BASIN THROUGH TOMORROW.
TEMPERATURES ACROSS THE MID SOUTH RANGE FROM THE LOWER 40S NORTH OF I-40 AND MIDDLE 40S TO LOWER 50S SOUTH. KEPT LOW END SCATTERED RAIN CHANCES IN THE FORECAST FOR THIS MORNING AND LOWERED POPS DOWN TO SLIGHT CHANCE THIS AFTERNOON AS WEAK RIDGING ALOFT IS ANTICIPATED TO BUILD ACROSS THE LOWER MISSISSIPPI VALLEY TODAY. ANY LINGERING RAIN CHANCES WILL GRADUALLY SHIFT SOUTH OF I-40 ACROSS NORTH MISSISSIPPI AS HIGH PRESSURE BUILDS IN ACROSS PORTIONS OF THE LOWER/MIDDLE MISSISSIPPI AND TENNESSEE VALLEYS INTO FRIDAY AFTERNOON.
AN AREA OF LOW PRESSURE PASSING NORTHEAST OF THE CWA WILL BRING MUCH ABOVE NORMAL TEMPERATURES FOR MOST OF SOUTH DAKOTA.
EXPECTING LOW TEMPERATURES TO BOTTOM OUT NEAR FREEZING AND TENDED TO SIDE WITH GUIDANCE THAT WERE ON THE COOL SIDE. A RIDGE BUILDS BACK INTO THE CENTRAL PLAINS TO PROVIDE WARM AND DRY WEATHER FRIDAY. THE NORTHEAST PORTIONS OF THE FORECAST AREA DID NOT RECEIVE MUCH RAINFALL TODAY AND WILL HAVE THE LOWEST RH VALUES OF THE AREA.
The back door cold front has cleared most of the CWA. Highs will range from 70 in Dothan and Albany to the lower 80s in Valdosta and Cross City.
1003 AM EDT FRI MAR 13 2015 STRONG HIGH PRESSURE EXTEND OVER THE AREA FROM THE NORTHEAST WILL GRADUALLY MOVE OFFSHORE TODAY. A WARM FRONT WILL LIFT NORTH TONIGHT INTO EARLY SATURDAY.
653 AM CDT FRI MAR 13 2015 FOR 12Z TAFS /ISSUED 332 AM CDT FRI MAR 13 2015/ THE 08Z SURFACE ANALYSIS INDICATED THAT A WARM FRONT WAS ANALYZED TO BE EXTENDING SOUTHEAST FROM CENTRAL MISSISSIPPI INTO CENTRAL AND SOUTHERN ALABAMA. TEMPS ALONG AND SOUTH OF THE WARM FRONT WERE IN THE MID-UPPER 60S WITH LOW-MID 60S DEWPOINTS NOTED ACROSS CENTRAL THROUGH SOUTHERN ALABAMA. EXPECT THAT MORE SCATTERED TO NUMEROUS SHOWERS WILL CONTINUE TO DEVELOP AND MOVE NORTHWARD INTO THE FORECAST AREA TODAY NEAR THE WARM FRONTAL BOUNDARY. DUE TO THE HIGH POTENTIAL FOR MORE PRECIP TODAY. THE MODELS FINALLY LIFT THE AREA OF LOW PRESSURE WELL NORTHEAST OF THE FORECAST AREA BY LATE SATURDAY NIGHT.
AS APPROACHING COLD FRONT WILL HELP SHUNT THE MOISTURE OFF TO THE EAST. COLD FRONT JUST BEGINNING TO CLEAR SOUTHEAST MICHIGAN AROUND 12Z SATURDAY EXPECTED TO LEAD TO MINS IN THE MID 30S TO AROUND 40 DEGREES.
407 AM PDT FRI MAR 13 2015 HIGH PRESSURE ALOFT AND WEAKENING OFFSHORE FLOW WILL BRING WELL ABOVE AVERAGE HIGH TEMPERATURES THROUGH THE WEEKEND.
FORECAST REMAINS ON TRACK AS AN UPPER RIDGE AND CLEAR SKIES KEEP CONDITIONS DRY AND WARM. UPPER LEVEL RIDGE AXIS PASSES BY THIS MORNING. ESPECIALLY IN THE HIGHER TERRAIN OF BAKER COUNTY AND THE WEST CENTRAL MTNS.
SURFACE RIDGING ACROSS THE EASTERN CONUS WILL WEAKEN AND SLIDE EASTWARD OFF OF THE COAST AND INTO THE WESTERN ATLANTIC.
926 AM EDT FRI MAR 13 2015 TEMPERATURES ARE COMING IN AROUND THE SAME AS YESTERDAY AND EVEN A DEGREE OR TWO COOLER IN SOME AREAS. THIS WILL TRANSLATE INTO SLIGHTLY COOLER TEMPS THAN YESTERDAY.
1141 AM CDT FRI MAR 13 2015 SOMEWHAT COOLER TEMPERATURES TODAY AND SATURDAY.
1150 AM EDT FRI MAR 13 2015 A WARM FRONT WILL LIFT NORTH THROUGH THE FORECAST AREA THIS AFTERNOON.
820 AM PDT Fri Mar 13 2015 High pressure will continue today followed by a chance of light rain across the northern mountains Saturday.
818 AM EDT FRI MAR 13 2015 STRENGTHENING WEDGE CONDITIONS ARE FORECAST TODAY WITH THE INFLUX OF COOLER AIR AT THE SURFACE AND RAIN SPREADING ACROSS THE REGION.
/ISSUED 354 AM CDT FRI MAR 13 2015/ A COMPLEX OMEGA BLOCKING UPPER AIR PATTERN EXISTS ACROSS MUCH OF THE U. THIS MORNING WITH UPPER RIDGING AND SPLIT FLOW ALONG THE WEST COAST AND AN UPPER LEVEL LOW PRESSURE SYSTEM CUT OFF OVER BAJA MEXICO.
A WEAK LOW PRESSURE SYSTEM WILL BRING A CHANCE OF RAIN SHOWERS IN EASTERN ARIZONA TODAY.
934 AM EDT FRI MAR 13 2015 CANADIAN HIGH PRESSURE WILL BUILD ACROSS THE REGION TODAY AND WILL AND PASS TO THE SOUTHEAST TONIGHT.
A STRONG AND EXPANSIVE RIDGE AXIS EXTENDS FROM THE NEW ENGLAND COAST. THE PERSISTENT DEEP AND STRONG ANTICYCLONE CENTERED JUST OFFSHORE OF THE SOUTHEAST UNITED STATES COAST WILL DROP SOUTHEASTWARD. WITH A SHARP RIDGE AXIS PERSISTING ACROSS OUR REGION. BREEZY TO WINDY CONDITIONS WILL CONTINUE WITH HIGHS GENERALLY IN THE LOWER 80S. WITH A LENGTHY AND STRONG RIDGE OF HIGH PRESSURE PRESSING SOUTHWARD DOWN THE SOUTHEAST UNITED STATES AND INTO THE FLORIDA PENINSULA.
A REINFORCING COLD FRONT THAT ARRIVES AFTER 06Z SATURDAY WILL INCREASE WIND SPEEDS AND LIFT CIGS INTO HIGH MVFR/LOW VFR CATEGORY AS LOWER LEVELS MIX BELOW THE CLOUD LAYER. /ISSUED 337 AM CDT FRI MAR 13 2015/ A WELL DEFINED UPPER TROUGH EXTENDING FROM WEST OF HOUSTON INTO THE NORTHERN GULF EARLY THIS MORNING WILL TRACK NNE ACROSS EAST TEXAS AND LOUISIANA TODAY. RAIN CHANCES WILL BEGIN DIMINISHING FROM SOUTHWEST TO NORTHEAST BY TONIGHT AS THE FORCING FROM THE UPPER TROUGH MOVES EAST OF THE AREA.
WATER VAPOR IMAGERY SHOWS UPPER LOW JUST TO OUR SOUTH OVER SOUTHERN SONORA. SNAPSHOT OF THE SYNOPTIC SITUATION ALSO SHOWS A VORT MAX IN THE VICINITY OF THE TEXAS PANHANDLE WITH AN ASSOCIATED TROUGH EXTENDING INTO COASTAL AREAS OF TEXAS/LOUISIANA. HIGH PRESSURE RESIDES OVER THE EASTERN PACIFIC WATERS. GENERALLY EXPECTING TO SEE ISOLATED ACTIVITY DEVELOP THIS AFTERNOON MAINLY CLOSE TO THE NEW MEXICO BORDER AND OVER THE HIGHER TERRAIN.
948 AM EDT FRI MAR 13 2015 HIGH PRESSURE CENTERED SOUTH OF NEW ENGLAND THIS MORNING SHIFTS OFFSHORE LATER TODAY. LOW PRESSURE WILL MOVE IN FROM THE SOUTHWEST ON SATURDAY.
LOW PRESSURE VCNTY UP SHIFTS EAST THIS PERIOD AND TAKES ASSOCIATED COLD FRONT ALONG WITH IT. GFS MORE AGGRESSIVE ON LOW LEVEL THERMAL TROUGH INTO ERN WI. BUFKIT SHOWS SATURATION POTENTIAL AOB 2K FT IN THE MORNING THOUGH CORE OF LOW LEVEL TROUGH ARRIVES IN THE AFTN AND THIS IS WHEN 925/850 RH INCREASES. LOW PRESSURE WILL TRACK ACROSS NORTHERN WISCONSIN TODAY WITH A TRAILING COLD FRONT SWEEPING THROUGH SOUTHERN WISCONSIN LATE IN THE AFTERNOON. A THERMAL RIDGE WILL POKE INTO SOUTHERN WISCONSIN AHEAD OF THE FRONT. KEEPING IT MUCH COOLER RIGHT ALONG THE SHORE. COOLER AIR WILL ARRIVE IN THE WAKE OF THE COLD FRONT. TEMPS TONIGHT WILL ONLY DROP INTO THE 30S TO AROUND 40 WITH HIGHS ON SATURDAY STILL REACHING THE LOWER TO MID 50S.
633 AM CDT FRI MAR 13 2015 MAIN CONCERNS TODAY WILL BE PATCHY EARLY MORNING FOG OVER THE EAST AND COLD FRONT MOVING INTO THE REGION ACROSS THE NORTHWEST DURING THE MORNING HOURS. A FEW SHOWERS ASSOCIATED WITH THE LOW OVER THE SOUTHERN PLAINS WILL MOVE TOWARD THE FAR SOUTHEAST THIS MORNING. AS THE COLD FRONT MOVES ACROSS THE REGION THIS AFTERNOON NW WINDS WILL INCREASE AND DEW POINTS WILL LOWER.
631 AM CDT Fri Mar 13 2015 Scattered rain showers continue to stream north across the region, ahead of an approaching upper level low currently centered over southeastern Texas.
THE LOW PRESSURE SYSTEM OVER NORTHEAST TEXAS IS DISPLAYING SOME WARM-CORE CHARACTERISTICS AS IT DRIFTS NORTHWARD. RAIN COVERAGE WILL LIKELY DIMINISH DURING THE AFTERNOON HOURS AS DIFFERENTIAL HEATING DISRUPTS THE MECHANISM FOR SUSTAINED BROAD SCALE LIFT NEAR THE CENTER OF THE LOW. A REINFORCING COLD FRONT THAT ARRIVES AFTER 06Z SATURDAY WILL INCREASE WIND SPEEDS AND LIFT CIGS INTO HIGH MVFR/LOW VFR CATEGORY AS LOWER LEVELS MIX BELOW THE CLOUD LAYER. /ISSUED 337 AM CDT FRI MAR 13 2015/ A WELL DEFINED UPPER TROUGH EXTENDING FROM WEST OF HOUSTON INTO THE NORTHERN GULF EARLY THIS MORNING WILL TRACK NNE ACROSS EAST TEXAS AND LOUISIANA TODAY. RAIN CHANCES WILL BEGIN DIMINISHING FROM SOUTHWEST TO NORTHEAST BY TONIGHT AS THE FORCING FROM THE UPPER TROUGH MOVES EAST OF THE AREA.
630 AM CDT FRI MAR 13 2015 ANOTHER UNSEASONABLY WARM DAY IS ON TAP FOR THE REGION AHEAD OF A WEAK COLD FRONT MARCHING SOUTHEAST ACROSS THE NORTHERN PLAINS. THIS WAVE WILL PUSH EAST TODAY DRIVING THE COLD FRONT ACROSS THE REGION. HIGH PRESSURE BUILDS IN TONIGHT INTO SATURDAY.
1253 PM EDT FRI MAR 13 2015 STRONG HIGH PRESSURE EXTEND OVER THE AREA FROM THE NORTHEAST WILL GRADUALLY MOVE OFFSHORE TODAY. A WARM FRONT WILL LIFT NORTH TONIGHT INTO EARLY SATURDAY.
709 AM EDT FRI MAR 13 2015 CANADIAN HIGH PRESSURE WILL BUILD ACROSS THE REGION TODAY AND WILL AND PASS TO THE SOUTHEAST TONIGHT.
AS AN AREA OF LOW PRESSURE LIFT NORTH ALONG THE SABINE RIVER TODAY WINDS WILL BECOME AND REMAIN S TO SW AT ALL TERMINALS AT AROUND 10 KTS OR LESS. /ISSUED 511 AM CDT FRI MAR 13 2015/ MEAN TROF REMAINS ANCHORED OVER THE SOUTHERN PLAINS AND NORTHERN MEXICO. MORE ISOLATED/SCATTERED PATCHES OF RAIN STILL ARE STILL POSSIBLE THIS AFTERNOON IN THE WRAP-AROUND REGION OF THE EXITING UPPER TROF. WILL CONTINUE PLUNGING INTO THE BACKSIDE OF THE MEAN TROF OUT WEST.
930 AM MDT FRI MAR 13 2015 THE FORECAST FOR TODAY IS ON TRACK FOR HIGHS IN THE 60S F AND SOME RELATIVELY LIGHT WINDS AS 500-MB RIDGING BUILDS ACROSS THE REGION. AN UPPER RIDGE WILL BUILD INTO THE REGION TODAY AND PROVIDE ABUNDANT SUNSHINE. LIGHTER WINDS AND LESS CLOUD COVER OVERNIGHT WILL PROVIDE A COOLER START THIS MORNING. EXPECTING A SLIGHTLY COOLER DAY TODAY DUE TO THIS ALONG WITH WEAK MIXING. THIS EVENT WILL QUICKLY DEVELOP A LEE TROUGH AND INCREASE WINDS OVER THE WESTERN VALLEYS. THIS WILL DRY OUT THE LOW LEVELS AND CAUSE DEWPOINTS TO FALL BACK INTO THE LOWER TO MID 20S. DEWPOINTS IN THE LOWER TO MID 20S WILL PRODUCE HUMIDITIES IN THE TEENS.
WINDS WILL BE GUSTY IN THE HIGHER ELEVATIONS. CHATTANOOGA AIRPORT, TN 56 52 70 50 / 100 100 50 30 KNOXVILLE MCGHEE TYSON AIRPORT, TN 58 52 67 46 / 90 100 60 40 OAK RIDGE, TN 57 53 67 45 / 100 100 60 40 TRI CITIES AIRPORT, TN 56 50 66 42 / 90 100 60 60.
An upper level ridge of high pressure will build over the region today to allow from some mid/high level cloudiness.
HIGH PRESSURE WILL BRING DRY WEATHER TO NORTHWEST CALIFORNIA TODAY AND TOMORROW IN MOST AREAS.
1036 AM EDT FRI MAR 13 2015 FRONT PUSHING NORTH AS A WARM FRONT TODAY AND TONIGHT. AND THEN BACK SOUTH AS COLD FRONT SATURDAY.
653 AM CDT FRI MAR 13 2015 SOMEWHAT COOLER TEMPERATURES TODAY AND SATURDAY.
722 AM EDT FRI MAR 13 2015 STRENGTHENING WEDGE CONDITIONS ARE FORECAST TODAY WITH THE INFLUX OF COOLER AIR AT THE SURFACE AND RAIN SPREADING ACROSS THE REGION.
THE SHOWER ACTIVITY IS SLOWLY DROPPING SOUTHWARD WITH TIME AS THE WEAK UPPER RIDGE AXIS REMAINS OVER WYOMING. A VERY WK DISORGANIZED UPPER TROUGH WILL MOVE SE OF THE CWA TODAY AS AN UPPER LEVEL RIDGE BEGINS TO BUILD ACROSS THE AREA TONIGHT. UPPER RIDGE OF HIGH PRESSURE WILL CONTINUE TO BUILD ACROSS THE REGION THROUGH THIS WEEKEND. DRY AND WARMER CONDITIONS ARE EXPECTED WITH READINGS WELL ABOVE NORMAL FOR THIS TIME OF YEAR.
622 AM CDT FRI MAR 13 2015 SURFACE ANALYSIS SHOWS A WEAK TROUGH OF LOW PRESSURE ACROSS THE FORECAST AREA EARLY THIS MORNING. THE TROUGH HAS BEEN WEAKENING AS IT DRIFTS TO THE EAST THROUGH THE NIGHT. THE RELATIVE HUMIDITIES WILL BE A LITTLE HIGHER THAN YESTERDAY WITH THE LOWER TEMPERATURES AND DEW POINTS A LITTLE HIGHER.
WARM DRY HIGH PRESSURE WILL BUILD ACROSS THE GREAT BASIN TODAY THROUGH THE WEEKEND. A BROAD WEAK CLOSED LOW CONTINUES MOVING SOUTH INTO MEXICO THIS MORNING WITH AN UPSTREAM RIDGE BUILDING INTO THE GREAT BASIN. THE RIDGE CONTINUES TO SLOWLY BUILD OVER THE GREAT BASIN TONIGHT AND SAT WITH CONTINUED GRADUAL AIRMASS AND SURFACE WARMING. YET MORE WARMING IS FORECAST FOR SUN AS THE RIDGE SHIFTS EAST A BIT AND SWLY FLOW PICKS UP BUT HIGH CLOUDS WILL PERSIST AS WELL. THE WEAK WAVE THAT THE GFS HAD BEEN SHOWING WOULD FLATTEN THE RIDGE A LITTLE MON AND SEND SOME COOLER AIR INTO NRN UT IS EVEN WEAKER IN THE 06Z RUN WITH MAYBE ONLY A DEGREE OR TWO OF COOLING AT 700 MB.
THAT DISTURBANCE IS FORECAST TO PHASE WITH THE NORTHERN STREAM AND RESULT IN AN EASTERN CANADIAN CLOSED LOW. AND COLD FRONT PASSAGE FOR THE THE UPPER OHIO ON SATURDAY. AREAS OUTSIDE OF THE STILL SNOW COVERED RIDGES REMAIN SATURATED.
930 AM PDT FRI MAR 13 2015 STRONG HIGH PRESSURE ALOFT WILL BRING WELL ABOVE AVERAGE HIGH TEMPERATURES THROUGH THE WEEKEND.
WE WILL SEE A WEAK UPPER TROF MOVE OVERHEAD FOR FRIDAY. IN GENERAL SYNOPTIC SCALE MIXED DOWN WINDS ARE SIGNIFICANTLY LIGHTER EVEN WITH A WESTERLY COMPONENT TO THE LOW LEVEL FLOW ENHANCING MIXING.
THE HIGHER SNOWFALL AMOUNTS ARE EXPECTED TO BE FOUND NORTH OF I70 AND EAST OF THE DIVIDE. LOOK FOR COOLER TEMPERATURES AND LIGHT WINDS TOMORROW ACROSS THE AREA WITH CLOUDS CLEARING IN THE MORNING AS SUBSIDENCE ON THE BACK OF THE JET MOVES OVER THE AREA. UPPER LEVEL RIDGING.
BUT ALSO KEEP TEMPERATURES WARMER THAN PREVIOUSLY THOUGHT. WARMER TEMPERATURES ALOFT WILL CAP CONVECTION FOR MOST OF CENTRAL ALABAMA FRIDAY AFTERNOON.
CHATTANOOGA AIRPORT, TN 59 77 47 60 / 20 50 80 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 56 76 49 56 / 40 50 70 10 OAK RIDGE, TN 57 74 49 57 / 40 60 80 10 TRI CITIES AIRPORT, TN 53 74 46 54 / 40 60 80 10.
1104 PM CDT THU APR 2 2015 STRONG COLD FRONT IS APPROACHING KGUY AND KDHT AND A SUDDEN INCREASE IN WIND SPEEDS BEHIND THE COLD FRONT WILL OCCUR BY 05Z WITH GUSTS TO AROUND 45 KNOTS EXPECTED FROM THE NORTH. /ISSUED 636 PM CDT THU APR 2 2015/ A COLD FRONT WILL ROLL THROUGH THE PANHANDLES LATE TONIGHT AND EARLY FRIDAY MORNING. THEN THE HIGHS MAY NEED TO BE BUMPED UP.
RAIN CHANGING TO SNOW AS COLD AIR MOVES IN BEHIND A COLD FRONT. BUT WILL FALL QUICKLY LATE THIS AFTERNOON IN NORTH-CENTRAL MINNESOTA AS COLD AIR MOVES IN BEHIND A COLD FRONT MOVING IN FROM THE WEST. MUCH COOLER.
650 PM CDT THU APR 2 2015 A COLD FRONT ASSOCIATED WITH A LOW PRESSURE SYSTEM OVER ONTARIO HAS MOVED THROUGH NORTH DAKOTA. HIGH PRESSURE OVER EASTERN MONTANA WILL BUILD OVER THE FORECAST AREA TONIGHT. WILL ALSO CANCEL THE RED FLAG WARNING AT 7 PM DUE TO THE DIMINISHING WINDS AND MUCH HIGHER HUMIDITIES THAT HAVE ALREADY MOVED INTO THE WARNED AREA BEHIND THE COLD FRONT. CURRENT SURFACE ANALYSIS PLACES LOW OVER ONTARIO WITH SECONDARY COLD FRONT PUSHING THROUGH THE NORTHERN PLAINS. MODEST WARM AIR ADVECTION WILL BRING WARMER TEMPERATURES TO THE AREA.
636 PM CDT THU APR 2 2015 00Z TAF CYCLE A COLD FRONT WILL MOVE THROUGH THE THREE TAF SITES BETWEEN 05Z AND 08Z FRIDAY. THE COLD FRONT WILL SHIFT THE WINDS FROM THE SOUTHWEST 15 TO 25 KNOTS WITH HIGHER GUSTS TO THE NORTH 20 TO 30 KNOTS WITH HIGHER GUSTS. VFR CONDITIONS WILL BECOME MVFR FOLLOWING THE PASSAGE OF THE COLD FRONT AT THE DALHART AND AMARILLO TAF SITES AFTER 05Z TO 08Z FRIDAY. /ISSUED 214 PM CDT THU APR 2 2015/ A COLD FRONT WILL ROLL THROUGH THE PANHANDLES LATE TONIGHT AND EARLY FRIDAY MORNING. THEN THE HIGHS MAY NEED TO BE BUMPED UP.
WENT WITH LIFR CONDITIONS FOR MOST LOCATIONS TO ACCOUNT FOR THE LOWER CLOUDS. BY LATE FRIDAY MORNING A COLD FRONT WILL BE POISED ACROSS ARKANSAS AND WILL MOVE INTO THE DELTA BY LATE AFTERNOON. THE COLD FRONT WILL MOVE INTO THE DELTA BY THE LATE AFTERNOON HOURS AND MOVE SOUTHEAST ACROSS THE AREA.
MVFR CIGS IN THE EVENING AHEAD OF A COLD FRONT WHICH WILL BE THROUGH AEX WITH IFR AND VCSH BY MIDNIGHT. A COLD FRONT WILL BRING SHOWERS JUST BEYOND THIS FORECAST PERIOD FRIDAY EVENING. WITH TEMPS IN THE LOWER 80S. NORTHERLY WINDS WILL USHER COOLER AND DRIER AIR TO THE REGION. A COLD FRONT WILL CROSS THE COASTAL WATERS FRIDAY NIGHT.
AHEAD OF A DEVELOPING COLD FRONT EXTENDING FROM WRN AND NRN OK INTO SW AND SCNTRL MO. EVEN WITH THE RETURN OF THE LOW STRATUS.
THIS EVENING THROUGH FRIDAY NIGHT CURRENT SURFACE ANALYSIS SHOWS LOW PRESSURE NORTH OF THE GREAT LAKES REGION. WITH A COLD FRONT EXTENDING SOUTHWESTWARD INTO THE NORTHERN PLAINS. ANOTHER LOW PRESSURE SYSTEM IS LOCATED OVER CENTRAL CO. UPPER LEVEL ANALYSIS SHOWS POSITIVELY TILTED TROF STRETCHING FROM SOUTH CENTRAL CANADA INTO THE CENTRAL ROCKIES. TEMPS THIS AFTERNOON RANGE FROM THE LOW TO MID 40S ACROSS NORTHEAST WY AND THE BLACK HILLS TO THE UPPER 50S ACROSS FAR SOUTH CENTRAL SD. COOL WEATHER WILL PERSIST THROUGH FRIDAY AS UPPER TROF REMAINS OVER THE REGION.
A cold front will blow in tomorrow morning accompanied by a gusty N wind.
A COLD FRONT WILL MOVE ACROSS THE AREA LATE TONIGHT AND FRIDAY MORNING WITH GUSTY NORTH WINDS AND MVFR CEILINGS FOLLOWING IN ITS WAKE.
945 PM CDT THU APR 2 2015 HIGH PRESSURE WILL BUILD OVER THE AREA TONIGHT. A COLD FRONT ASSOCIATED WITH A LOW PRESSURE SYSTEM OVER ONTARIO HAS MOVED THROUGH NORTH DAKOTA. HIGH PRESSURE OVER EASTERN MONTANA WILL BUILD OVER THE FORECAST AREA TONIGHT. WILL ALSO CANCEL THE RED FLAG WARNING AT 7 PM DUE TO THE DIMINISHING WINDS AND MUCH HIGHER HUMIDITIES THAT HAVE ALREADY MOVED INTO THE WARNED AREA BEHIND THE COLD FRONT. CURRENT SURFACE ANALYSIS PLACES LOW OVER ONTARIO WITH SECONDARY COLD FRONT PUSHING THROUGH THE NORTHERN PLAINS. MODEST WARM AIR ADVECTION WILL BRING WARMER TEMPERATURES TO THE AREA.
936 PM CDT THU APR 2 2015 WEAK HIGH PRESSURE TO CONTINUE TO SLOWLY BUILD INTO THE NORTHERN PLAINS AHEAD OF ANOTHER CLIPPER/NRN STREAM TROUGH FEATURE. WE WILL SEE A WEAK UPPER TROF MOVE OVERHEAD FOR FRIDAY. IN GENERAL SYNOPTIC SCALE MIXED DOWN WINDS ARE SIGNIFICANTLY LIGHTER EVEN WITH A WESTERLY COMPONENT TO THE LOW LEVEL FLOW ENHANCING MIXING.
631 PM CDT Thu Apr 2 2015 19z/2pm surface map shows cold front extending from near Danville to just north of St. Light rain will develop along/north of the low, but most of this precip will hold off until Friday morning. 850mb moisture axis and thermal ridge pointed northward along MS river into southern IL this morning. Cold front on surface data and SFC mesoscale analysis data has reached central IL.
930 PM PDT THU APR 2 2015 WEAK OFFSHORE FLOW FRIDAY WILL BRING SIGNIFICANTLY WARMER WEATHER WITH GREATEST WARMING WEST OF THE MOUNTAINS.