Aikyam-Lab/Synoptic-Bench huggingface dataset:
201 AM EDT WED JUN 24 2015 A QUIET WEDNESDAY UNDER HIGH PRESSURE.
ZONAL FLOW EXISTS ACROSS THE NORTHERN CONUS WITH STRONG RIDGING EQUATORWARD OF THE STRONGER WESTERLIES.
EXPECT SCT TSTMS OVER THE HIGHER TERRAIN THIS AFTN WITH WIDELY SCT ACTIVITY OVER THE VALLEYS. AS FOR HIGHS WILL KEEP READINGS SIMILAR TO YESTERDAY AS 850-700 MB TEMPS CHANGE LITTLE HOWEVER IF WNW DOWNSLOPE WINDS DO DVLP ALONG THE FRONT RANGE HIGHS COULD END UP BEING A FEW DEGREES WARMER THAN FCST. FOR TONIGHT TSTMS SHOULD END OVER THE HIGHER TERRAIN DURING THE EARLY EVENING HOURS. MODERATE WESTERLY FLOW ALOFT WILL BE IN PLACE AS AN UPPER RIDGE CONTINUES OVER THE SOUTHEASTERN UNITED STATES.
123 AM EDT WED JUN 24 2015 HIGH PRESSURE WILL BUILD INTO THE AREA TONIGHT.
EXPECT WARMING TEMPS ALOFT AS THE RIDGE BUILDS IN.
SHORT RANGE MODELS SUGGEST A DRIFT TO THE SOUTHEAST THROUGH 12Z THEN BUILDING NORTH AGAIN THROUGH THE MORNING AND INTO THE AFTERNOON WITH THE SURFACE WARM FRONT.
323 AM MDT WED JUN 24 2015 A SIZABLE H7 HIGH PRESSURE SYSTEM CENTERED OVER THE SOUTHERN US WILL ALLOW PRECIPITABLE WATER TO INCREASE TODAY.
255 AM PDT WED JUN 24 2015 HIGH PRESSURE WILL RETURN FOR THE LATTER PART OF THE WEEK.
347 AM EDT WED JUN 24 2015 A COLD FRONT HAS PUSHED EAST OF THE AREA.
THE LOW TO MID 70 DEWPOINTS WILL GENERALLY BE BOTTLED UP OVER SOUTHEAST MISSOURI TODAY.
MOIST LOW LEVEL EAST AND NORTHEAST WINDS WILL ADVECT LOW LEVEL MOISTURE WESTWARD ACROSS OUR EASTERN PLAINS WITH A WELL DEFINED 850 MB AND 700 MB THETA-E RIDGE FROM DOUGLAS TO SIDNEY.
WITH THE HIGHEST CHANCE OVER FAR NORTHERN MINNESOTA.
316 AM CDT WED JUN 24 2015 07Z/2AM SURFACE MAP SHOWS HIGH PRESSURE OVER LAKE MICHIGAN.
356 AM CDT WED JUN 24 2015 AN UPPER RIDGE CENTERED OVER OK THIS MORNING WILL SLIDE EAST DURING THE DAY.
218 AM CDT WED JUN 24 2015 HIGH PRESSURE CONTINUES TO BE WELL ESTABLISHED ACROSS THE SOUTHEASTERN PART OF THE COUNTRY CENTERED ON ARKANSAS THOUGH THERE IS A WEAKNESS EVIDENT ACROSS NORTHERN MEXICO INTO THE SUN COUNTRY OF TEXAS AND SRN NM. THIS WEAKNESS IS THE FIRST INDICATIONS OF A CHANGE IN HIGH PRESSURE DOMINANCE FROM THE SOUTHEAST TO THE SOUTHWEST. AFTER THE LOW CLOUDINESS WHICH IS BEST HANDLED VIA PERSISTENCE LIFTS.
202 AM EDT WED JUN 24 2015 COLD FRONT DROPS SOUTH TONIGHT. TEMPERATURES SHOULD BE COOLER FOR THE WEEKEND.
151 AM EDT WED JUN 24 2015 A COLD FRONT HAS PUSHED EAST OF THE AREA.
319 AM EDT WED JUN 24 2015 A COLD FRONT WILL PUSH SOUTH OF NEW ENGLAND TODAY AS HIGH PRESSURE BUILDS IN FROM THE WEST.
THE WEST TO EAST SURFACE FRONTAL BOUNDARY WILL MOVE NORTH ACROSS NORTHWEST AND NORTH CENTRAL KANSAS TODAY AS AN UPPER HIGH SHIFTS SLOWLY NORTH OUT OF NORTHERN OKLAHOMA INTO SOUTHERN KANSAS.
EARLY MORNING TEMPERATURES WILL DROP INTO THE 50S WITH HIGH PRESSURE OVER THE REGION. A FRONT WILL COME BACK NORTH AS A WARM FRONT AS AN UPPER LEVEL SYSTEM MOVES EAST.
VERY WARM TEMPERATURES WILL BE THE STORY OVER THE NEXT FEW DAYS AS UPPER RIDGING BUILDS IN. 850 MB TEMPS WILL REMAIN QUITE WARM IN THE LOW 20S C. BUT THANKS TO WEAK NORTHERLY FLOW AND APPROACHING HIGH PRESSURE.
105 AM EDT WED JUN 24 2015 A COLD FRONT HAS PUSHED EAST OF THE AREA.
HIGH PRESSURE ALOFT WAS CENTERED OVER NORTHERN ARKANSAS AND COVERED THE FOUR STATE FORECAST AREA.
WILL ONLY PUT SLIGHT CHANCE OF A THUNDERSTORM IN FORECAST TODAY AS HIGH PRESSURE SHIFTS FURTHER EAST PROVIDING A LITTLE MORE CAPPING ACROSS MOST OF OUR CWA. TEMPS WILL RANGE FROM THE LOW TO MID 90S TODAY FOR MOST AREAS WITH DEWPOINTS IN THE UPPER 60S TO LOW 70S.
ANCHORED BY PREVALENT SURFACE RIDGING TUCKED BENEATH BENIGN ZONAL WEST-NORTHWEST MID LEVEL FLOW. STRIP OF WEAK HEIGHT FALLS STREAMING ACROSS LAKE SUPERIOR/NORTHERN LAKE HURON WILL EASE A COLD FRONT SOUTHEAST AND INTO NORTHERN LOWER DURING THE LATTER HALF OF THE DAY. EXTENSIVE CONVECTIVE DEVELOPMENT LIKELY BY THIS EVENING ACROSS PARTS OF IOWA/NORTHERN IL WITHIN THE GROWING INSTABILITY AXIS ALONG A STRENGTHENING WARM FRONT.
253 AM EDT WED JUN 24 2015 HIGH PRESSURE IN CHARGE FOR TODAY.
THE HIGHER RESOLUTION MODELS KEEP THE BULK OF THE QPF AND CONVECTION SOUTH OF THE BORDER. AND EVEN SUPPRESS THE WARM FRONT TO OUR SOUTH. WILL TRY TO KEEP THE BEST POPS/QPF TIED MUCH CLOSER TO THE SURFACE WARM FRONT THAN THE H8 WARM FRONT WHICH IS FAVORED BY THE SOME OF THE MODELS.
328 AM PDT WED JUN 24 2015 CORRECTED HIGH PRESSURE WILL KEEP THE WEATHER FAIR AND DRY MUCH OF THIS WEEK.
ITS SUMMERTIME WHICH MEANS HOT AND HUMID WITH THE HIGHEST TEMPS STILL LAYING AHEAD OF US.
506 AM CDT WED JUN 24 2015 SURFACE RIDGING CONTINUES TO WEAKEN WITH A BOUNDARY TO THE NORTH STALLED OUT FROM NEBRASKA TO VIRGINIA.
HIGH PRESSURE OVER THE WESTERN ATLANTIC WILL KEEP AN EAST FLOW IN THE LOW LEVELS AND HIGH PRESSURE AT 500MB OVER THE CENTRAL U. THE FREEZING LEVEL IS STILL ABOVE 15K FT AND LAPSE RATES ARE GENERALLY RIGHT AROUND 6C/KM. THE UPPER LEVEL RIDGE BREAKS DOWN AND A VERY WEAK UPPER LEVEL LOW DEVELOPS OVER THE FLORIDA PENINSULA.
128 AM EDT WED JUN 24 2015 A COOLER AND LESS HUMID AIRMASS WILL BE USHERED IN FOR OVERNIGHT INTO WEDNESDAY.
631 AM EDT WED JUN 24 2015 HIGH PRESSURE IN CHARGE FOR TODAY.
348 AM EDT WED JUN 24 2015 A COLD FRONT STALLS OVER NORTH CAROLINA THIS AFTERNOON.
1205 AM CDT WED JUN 24 2015 12Z UA ANALYSIS HAS AN 850MB COLD FRONT FROM NEAR KDET INTO NORTHERN KANSAS AND AN 850MB HIGH OVER SOUTH DAKOTA. 18Z SFC DATA PLACES THE COLD FRONT FROM NEAR KCLE INTO SOUTHERN KANSAS. THE NOCTURNAL CONVECTIVE COMPLEX SHOULD SLOWLY OVERSPREAD ALL BUT THE HIGHWAY 20 CORRIDOR BY MID DAY WEDNESDAY.
623 AM EDT WED JUN 24 2015 A COLD FRONT STALLS OVER NORTH CAROLINA THIS AFTERNOON.
SLIGHTLY COOLER TEMPERATURES WERE NOTED FOR OUR CENTRAL AND EASTERN AREAS. BUT WITH HIGHS STILL IN THE LOW/MID 90S.
MIDLEVEL COLD FRONT APPEARS TO BE OVERHEAD AS DEPICTED BY LIGHT RETURNS ON THE THE REGIONAL RADAR. HIGH PRESSURE BUILDS INTO THE REGION ON MONDAY. WHILE TEMPERATURES WILL BE COOLER THAN TODAY. FLOW WILL ALREADY BE INCREASING FROM THE SOUTHEAST ON MONDAY NIGHT AS LOW PRESSURE DEEPENS OVER THE LOWER MISSISSIPPI VALLEY.
628 PM EST SUN FEB 21 2016 FRONTAL BOUNDARY AND WAVE OF LOW PRESSURE IS MOVING EAST TONIGHT. AS HIGH PRESSURE AND A DRY AIRMASS BUILD ACROSS THE GREAT LAKES.
WILL SEE INCREASING CLOUDS STREAMING BACK INTO THE STATE FROM NEXT STRONGER INCOMING TROF. MUCH OF THE LOWER LEVEL MOISTURE WILL WAIT UNTIL AFTERNOON TO INCREASE OVER THE MOUNTAINS. THE UPPER TROUGH IS PROGGED TO DROP SOUTHEAST OVER THE STATE MONDAY NIGHT. MODELS DID END UP KEEPING THE TROUGH AND EVENTUAL CLOSED LOW FURTHER WEST THAN PREVIOUS RUNS. WILL ISSUE A WINTER WEATHER ADVISORY FOR THE HIGH MOUNTAINS ALONG AND SOUTH OF I70 CORRIDOR WITH 6 TO 12 INCHES EXPECTED THERE.
NUMEROUS TO WIDESPREAD SHOWERS CONTINUE AHEAD OF A SURFACE COLD FRONT. CURRENT WATER VAPOR IMAGERY AND RAP UPPER AIR ANALYSIS INDICATES A LOW AMPLITUDE TROUGH MOVING ACROSS THE MID-MISSISSIPPI RIVER VALLEY INTO THE OHIO RIVER VALLEY. THIS TROUGH WILL PUSH THE FRONT FURTHER TO THE SOUTHEAST THROUGHOUT THE REMAINDER OF THE AFTERNOON AND INTO THE OVERNIGHT HOURS. MODELS AGREE THAT THE COLD FRONT DOES NOT MOVE INTO THE AREA UNTIL AFTER 00Z WITH IT FINALLY EXITING TO THE SOUTHEAST AROUND 09-10Z. A FEW THUNDERSTORMS MAY BE POSSIBLE ACROSS THE SOUTHERN VALLEY AND SOUTHERN APPALACHIANS WITH TEMPERATURES CLIMBING UP INTO THE LOW 60S.
Temperatures across the area have risen into the 50s, despite cooler northerly winds today and thanks in part to abundant sunshine. Could have gone a little cool on the overnight lows depending on how fast clouds get in and how thick they are, with forecast lows near freezing. Highs are forecast about 10 degrees cooler than Sunday, with highs in the upper 40s to low 50s.
DRY AND UNSEASONABLY WARM WEATHER CONDITIONS WILL PERSIST OVER THE REGION THROUGH MUCH OF THE UPCOMING WEEK AS HIGH PRESSURE BUILDS ALONG THE WEST COAST. TEMPERATURES ARE NOW RUNNING A FEW TO SEVERAL DEGREES WARMER VERSUS YESTERDAY AS WEAK RIDGING REMAINS ALOFT LOCALLY. THE SOUTH AND EAST BAY AS MUCH AS 7 DEGREES WARMER THAN YESTERDAYS NEAR NORMAL VALUES. WITH A CLOUD BAND ASSOCIATED WITH AN UPPER TROUGH OVER NORTHERN CALIFORNIA AND THE PACIFIC NORTHWEST. THIS UPPER TROUGH WILL BRING A FEW HIGH LEVEL CLOUDS OVER THE NORTH BAY THIS AFTERNOON BUT RESULT IN LITTLE OTHER IMPACT. A RESILIENT HIGH AMPLITUDE HIGH PRESSURE RIDGE THEN BUILDS IN FOR THE WORKWEEK AHEAD. A WEAK PULSE WILL BRIEFLY WEAKEN THE RIDGE MIDWEEK BUT THE RIDGE BOUNCES BACK EVEN STRONGER.
HIGH PRESSURE NEAR WINNIPEG THIS AFTN WITH CLEARING AS FAR SOUTH AS DEVILS LAKE-GRAND FORKS-BEMIDJI AT 20Z.
528 PM CST SUN FEB 21 2016 FOR 00Z TAFS /ISSUED 141 PM CST SUN FEB 21 2016/ MOIST AND MILD AIRMASS WAS IN PLACE OVER THE TN VALLEY IN ADVANCE OF AN APPROACHING COLD FRONT. AT THE SFC, THE COLD FRONT WAS SITUATED FROM A LOW IN ERN WV THRU KY TO ANOTHER LOW IN NERN AR. THE COLD FRONT DROPS JUST S OF OUR AREA ON MONDAY, THEN STALLS AS THE NEXT WAVE IN THE DESERT SW QUICKLY TRANSLATES THRU THE GULF STATES.
THE APPROACHING INTENSIFYING TROUGH WILL ESTABLISH MORE UPSLOPE LOW LEVEL FLOW WHICH WILL IN TURN GARNER SOME MOIST ISENTROPIC ASCENT. WITH THE LOW LEVEL FLOW VEERING AROUND TO THE SOUTHEAST. ALSO HELPING WITH THE POSSIBILITY FOR STORMS IS INCREASING DYNAMIC LIFT ACROSS THE REGION AS THE TROUGH CONTINUES TO DEEPEN INTO A CLOSED LOW. SHOWS THAT MODELS ARE TENDING TOWARDS A DEEPER AND SLIGHTLY SLOWER WAVE BUT ALSO SLOWER DEVELOPMENT OF THE CLOSED LOW. THE IMPACTS FROM A SLOWER DEVELOPMENT OF A CLOSED LOW WOULD BE WIND SPEEDS MONDAY AFTERNOON NOT RAMPING UP QUITE AS MUCH AS PREVIOUS RUNS AS THE TIGHTEST PRESSURE GRADIENT WOULD BE EAST OF OUR FORECAST AREA.
COOLER NORTH AND EAST UNDER CLOUDS. A TYPICAL TEMPERATURE GRADIENT WILL SET UP ACROSS THE STATE AGAIN THIS WEEK WITH MUCH ABOVE NORMAL TEMPERATURES ACROSS THE SOUTHWEST AND COOLER TEMPERATURES ACROSS THE NORTHEAST.
544 PM CST SUN FEB 21 2016 SHORT WAVE TROUGH CURRENTLY OVER THE FAR WEST TX BIG BEND TO CONTINUE SLOWLY MOVING E THROUGH MONDAY. THIS TROUGH WILL ADVECT TROPICAL MOISTURE FROM THE E PACIFIC THROUGH MONDAY. /ISSUED 307 PM CST SUN FEB 21 2016/ COLD FRONT STILL JUST WEST OF THE REGION. AS LOW PRESSURE OVER EAST TX WRAPS UP MONDAY NIGHT.
333 PM CST SUN FEB 21 2016 COOLER TODAY ALTHOUGH STILL ABOVE NORMAL FOR THE DATE. WITH TEMPS MAINLY IN THE LOWER TO MIDDLE 40S AT MID AFTERNOON. WEAK HIGH PRESSURE TO PROVIDE TRANQUIL CONDITIONS WITH LIGHT WIND.
258 PM CST SUN FEB 21 2016 Temperatures across the area have risen into the 50s, despite cooler northerly winds today and thanks in part to abundant sunshine. Could have gone a little cool on the overnight lows depending on how fast clouds get in and how thick they are, with forecast lows near freezing. Highs are forecast about 10 degrees cooler than Sunday, with highs in the upper 40s to low 50s.
Weak north to northeasterly low level flow will bring some of the low clouds south into the northern and western parts of the area by late tonight.
A WEAK COLD FRONT WILL MOVE ACROSS THE SOUTHERN APPALACHIAN REGION TONIGHT. CHATTANOOGA AIRPORT, TN 53 62 49 59 / 50 30 80 60 KNOXVILLE MCGHEE TYSON AIRPORT, TN 50 59 47 60 / 50 10 70 40 OAK RIDGE, TN 49 59 46 60 / 50 10 60 50 TRI CITIES AIRPORT, TN 45 57 43 56 / 50 10 60 60.
High pressure will continue to dominate the weather pattern for our area for the rest of tonight, and with mostly clear skies outside of high thin clouds, providing even slightly cooler overnight lows by early Monday.
651 PM EST SUN FEB 21 2016 AN APPROACHING COLD FRONT TONIGHT WILL SLOWLY PUSH THROUGH THE FORECAST AREA MONDAY.
Clouds continue to decrease in the wake of fropa as high pressure builds in. Otherwise dry through Monday night, with temperatures a bit cooler.
Cold front has pushed into far Southeast Oklahoma near the red river/Frogville.
THEREFORE HIGHS WILL ONLY BE IN THE LOW TO MID 70S AREAWIDE TODAY.
TEMPERATURES ARE 10 TO 15 DEGREES COOLER THAN YESTERDAY BUT WINDS ARE ALSO MUCH LOWER AS WELL. MODELS IN GOOD AGREEMENT EARLY THIS WEEK SHOWING THE PACIFIC UPPER LEVEL TROUGH. KEPT POP BETWEEN 50 TO 70 PERCENT FOR THE LOWER ELEVATIONS ALONG AND WEST OF I25.
244 PM EST SUN FEB 21 2016 A COLD FRONT WILL CROSS THE REGION THIS EVENING. HIGH PRESSURE WILL THEN BUILD EAST TOWARD THE AREA LATE TONIGHT AND MONDAY. MUCH COLDER AIR WILL FOLLOW THE PASSAGE OF A COLD FRONT EARLY THIS EVENING ALONG WITH A FEW SNOW SHOWERS ACROSS NORTHERN AREAS AS THE COLDER AIR MOVES IN. EXPECT CLEARING SKIES OVERNIGHT AS HIGH PRESSURE BUILDS EAST. HIGH PRESSURE WILL CONTINUE TO BUILD EAST ON MONDAY WITH MAINLY SUNNY SKIES AND HIGH TEMPERATURES RANGING FROM THE LOW TO MID TEENS NORTH AND MID TO UPPER 20S DOWNEAST. HIGH WL BUILD EAST INTO THE MARITIMES ON TUE WITH SRLY FLOW DRAWING IN WARMER AND MORE MOIST AIR. EXPECT PCPN TO END AS A PD OF SNOW SHOWERS FRI NIGHT AS UPR LVL TROF SCOOTS THRU WITH NEXT SYSTEM FOLLOWING CLOSELY ON ITS HEELS.
SO THE FOCUS OF THIS UPDATE WAS ON REFINING SKY COVER THROUGH THE EVENING WITH AN EXPECTATION THAT MOST OF THE LOW CLOUDS MAY NOT REDEVELOP DESPITE SUNSET. COOLER NORTH AND EAST UNDER CLOUDS. A TYPICAL TEMPERATURE GRADIENT WILL SET UP ACROSS THE STATE AGAIN THIS WEEK WITH MUCH ABOVE NORMAL TEMPERATURES ACROSS THE SOUTHWEST AND COOLER TEMPERATURES ACROSS THE NORTHEAST.
TONIGHT AND MONDAY THE LATEST RAP ANALYSIS AND SATELLITE/RADAR IMAGERY SHOW AN ARCTIC COLD FRONT DROPPING SOUTH OVER THE UPPER PENINSULA AND CENTRAL MINNESOTA EARLY THIS AFTERNOON. THE REINFORCING ARCTIC COLD FRONT WILL BE MOVING SOUTH ACROSS MUCH OF THE REGION. BUT THIS AREA COULD SHIFT SLIGHTLY SINCE THE TROUGH IS SUCH A SMALL SCALE FEATURE. THE LOW LEVEL TROUGH DOES NOT MOVE MUCH DURING THE MORNING HOURS. SOME WEAKENING OF THE TROUGH IS EXPECTED DURING THE AFTERNOON. MAKING SNOWFALL CHANCES THE HIGHEST DURING THE MORNING HOURS. WILL KEEP THE HIGHEST CHANCES DURING THE MORNING.
ANOTHER UNSEASONABLY STRONG HIGH PRESSURE SYSTEM IS FORECAST TO BUILD OVER THE REGION THROUGH MONDAY.
635 PM EST SUN FEB 21 2016 THE LATEST SURFACE ANALYSES INDICATES LOW PRESSURE OVER THE MID ATLANTIC WITH FRONTAL BOUNDARY ACROSS THE TENNESSEE VALLEY PROMOTING A LOCAL MOIST SW FLOW. ADDITIONAL ENERGY FOR MONDAY WITH LOW PRESSURE DEVELOPING ACROSS THE AREA AS WEDGE BEGINS TO DEVELOP OVER THE CAROLINAS AND INTO NE GEORGIA.
A BUILDING RIDGE OF HIGH PRESSURE IN THE EASTERN PACIFIC WILL TURN THE WESTERLY FLOW TO NORTHWEST ON MONDAY.
In spite of a cold front moving through the region earlier this morning, temperatures were still able to rebound nicely. Readings range from the upper 50s in central MO to the low 70s in south central MO. Quiet, seasonable weather is expected through Monday as high pressure dominates our weather regime.
DURING THE LAST 6 HOURS OF THIS TAF CYCLE WE WILL SEE THE INFLUENCE OF AN APPROACHING UPPER LEVEL TROUGH.
DAYTIME HIGHS WILL BE A LITTLE COOLER ON MONDAY BUT STILL ABOVE NORMAL.
COOLER TODAY ALTHOUGH STILL ABOVE NORMAL FOR THE DATE. WITH TEMPS MAINLY IN THE LOWER TO MIDDLE 40S AT MID AFTERNOON. WEAK HIGH PRESSURE TO PROVIDE TRANQUIL CONDITIONS WITH LIGHT WIND.
245 PM EST SUN FEB 21 2016 THE LATEST SURFACE ANALYSES INDICATES LOW PRESSURE OVER THE MID ATLANTIC WITH FRONTAL BOUNDARY ACROSS THE TENNESSEE VALLEY PROMOTING A LOCAL MOIST SW FLOW. ADDITIONAL ENERGY FOR MONDAY WITH LOW PRESSURE DEVELOPING ACROSS THE AREA AS WEDGE BEGINS TO DEVELOP OVER THE CAROLINAS AND INTO NE GEORGIA.
HAVE HEDGED TOWARDS THE WARMER SIDE OF GUIDANCE. AND KEPT HIGHS WARMER THERE.
THIS WAVE WILL REACH WESTERN MT BY 12Z MON AND PUSH A COLD FRONT INTO THE AREA. THE WAVE AND COLD FRONT WILL CROSS THE AREA DURING MON USHERING IN A FEW SHOWERS AND GUSTY NW WINDS.
Cold front passage will bring northerly wind gusts near 25 mph overnight, with the boundary clearing the CWA by sunrise.
A weak cold front has moved into West Central Texas; however, surface winds will remain mainly variable at 6 knots or less, through tonight. /issued 356 PM CST SUN FEB 21 2016/ A cold front has moved through the northern half of the CWA this afternoon. Cooler overnight lows in the mid 40s to near 50 degrees can be expected tonight. Will go ahead and keep a slight chance for showers and thunderstorms area-wide tomorrow as moist southerly flow quickly returns to the area as another cold front approaches from the north.
107 PM MST SUN FEB 21 2016 UPPER FLOW WILL BE NORTHWESTERLY TODAY AND TONIGHT AND THEN BECOME MORE WESTERLY AS THE UPPER TROUGH APPROACHES THE HIGH PLAINS.
226 PM EST SUN FEB 21 2016 AN APPROACHING COLD FRONT TONIGHT WILL SLOWLY PUSH THROUGH THE FORECAST AREA MONDAY.
228 PM EST SUN FEB 21 2016 LOW PRESSURE WILL SPREAD RAIN SOUTH OF THE I 70 CORRIDOR TODAY. COOLER AIR WILL FILTER OVER THE REGION AS THE SYSTEM EXITS. AS HIGH PRESSURE CONTINUES TO BUILD INTO THE REGION ON MONDAY. WHILE TEMPERATURES WILL BE COOLER THAN TODAY. FLOW WILL ALREADY BE INCREASING FROM THE SOUTHEAST ON MONDAY NIGHT AS LOW PRESSURE DEEPENS OVER THE LOWER MISSISSIPPI VALLEY.
(MODIFIED PREVIOUS DISCUSSION) MID/UPPER FLOW BECOMES STRONGER AND AS HEIGHTS BEGIN TO LOWER AS BROAD TROUGH TAKES SHAPE OVER THE GULF OF MEXICO.
CHATTANOOGA AIRPORT, TN 53 62 49 59 / 50 30 80 60 KNOXVILLE MCGHEE TYSON AIRPORT, TN 50 59 47 60 / 50 10 70 40 OAK RIDGE, TN 49 59 46 60 / 50 10 60 50 TRI CITIES AIRPORT, TN 45 57 43 56 / 50 10 60 60.
SNOW ACCUMULATIONS WILL REMAIN LIGHT AND MAINLY IN THE HIGHER ELEVATIONS.
1049 PM EST SUN FEB 21 2016 HIGH PRESSURE PREVAILS MONDAY WITH WET CONDITIONS RETURNING MID- WEEK. HIGH PRESSURE SHOULD LEAD TO A MOSTLY SUNNY DAY ACROSS THE REGION WITH TEMPERATURES NEAR SEASONAL AVERAGES. HIGHLIGHT OF THIS PERIOD IS THE INCOMING STRONG LOW PRESSURE OVER THE LOWER MISSISSIPPI VALLEY AS IT LIFTS NORTHEASTWARD TOWARD THE LOW GREAT LAKES.
HIGH PRESSURE IS PUSHING SOUTH OVER NORTH TEXAS WITH COOLER. A WEAK SHORT WAVE TROUGH ALOFT WILL SUPPORT SOME ADDITIONAL ADVANCE OF THE COLD FRONT INTO CENTRAL AND SOUTH TEXAS TONIGHT. BUT THE MAIN HIGH PRESSURE AREA WILL BE SLIDING EAST OUT OF THE GREAT LAKES BY THEN AND THE ANCHOR LOW WILL BE TRACKING TOWARD THE LOWER MISSISSIPPI VALLEY WHILE THE FRONT LOSES SOUTHWARD MOMENTUM. WITH THE HIGHER DEW POINTS. A LIGHT TO MODERATE SOUTHEAST WIND WILL EVENTUALLY DEVELOP UNDER PARTLY TO MOSTLY CLOUDY SKIES WITH HIGH TEMPERATURES IN THE LOWER TO MID 80S EXCEPT FOR 70S AT AND NEAR THE COAST. IN THE LOWER TO MID 60S.
TEMPERATURES OVERNIGHT WILL BE NEAR SEASONAL NORMS WITH LOWS AROUND 50 TO THE LOWER 50S ACROSS THE NATURE COAST.
FORECAST SOUNDINGS ARE INDICATING A FAIRLY DEEP NEAR SURFACE SATURATED LAYER ASSOCIATED WITH THE HIGH PRESSURE AREA AND SOME SIGNAL FOR DRIZZLE OR SPRINKLES. ESPECIALLY ACROSS OUR NORTHERN AND WESTERN COUNTIES WHERE THE CENTER OF THE HIGH WILL MOVE IN AFTER ABOUT 09Z AND THROUGH SUNRISE MONDAY.
/ISSUED 330 PM CST SUN FEB 21 2016/ A POTENT LOW PRESSURE SYSTEM MID WEEK COULD BRING BOTH A CHANCE OF SEVERE WEATHER AND WINTER WEATHER TO THE MIDSOUTH. A COLD FRONT STRETCHES FROM NEAR CAMDEN TENNESSEE TO WYNNE ARKANSAS. COOLER AIR WILL FILTER INTO THE AREA BEHIND THE FRONT. EXPECT LOWS IN THE LOWER 40S TO AROUND 50 DEGREES. A SERIES OF WEAK LOW PRESSURE CENTERS WILL DEVELOP ALONG THE FRONT.
PRODUCING SOME LIGHT SNOW SHOWERS OR FLURRIES UNDER THE TROUGH. BUT THAT WILL MAINLY SERVE TO COUNTERACT WEAKENING TROUGH INSTEAD OF INCREASING THE MAGNITUDE OR COVERAGE OF SNOW SHOWERS. SURFACE RIDGING WILL MOVE ACROSS THE UPPER LAKES ON MONDAY WITH A TRANQUIL SEASONABLE DAY EXPECTED.
225 PM MST SUN FEB 21 2016 ANOTHER UNSEASONABLY STRONG HIGH PRESSURE SYSTEM IS FORECAST TO BUILD OVER THE REGION THROUGH MONDAY.
Along the southern edge of the ridge winds across the forecast area are out of the north, allowing cool air to move into northern Missouri and Kansas. Despite the cooler temperatures on Sunday highs are still well above average, in the middle 50s along and south of I-70, and in the middle 40s further north.
AN AREA OF LOW PRESSURE AND COLD FRONT OVER SOUTHERN INDIANA WILL MOVE ON TO THE EAST AS HIGH PRESSURE OVER SOUTH CENTRAL CANADA BUILDS EAST SOUTHEAST INTO THE GREAT LAKES BY MONDAY.
SHORT WAVE TROUGH OVER THE S ROCKIES ON WATER VAPOR IMAGERY SHOULD MOVE ACROSS TX TONIGHT AND EAST OF SE TX BY MONDAY AFTERNOON. EXPECT CEILINGS AND CIGS TO IMPROVE LATE MORNING AND AFTERNOON AS SHORT WAVE TROUGH MOVES EAST. EXPECT VFR CIGS BY AFTERNOON AS TROUGH MOVES EAST.
416 PM EST SUN FEB 21 2016 FRONTAL BOUNDARY AND WAVE OF LOW PRESSURE IS MOVING EAST TONIGHT. AS HIGH PRESSURE AND A DRY AIRMASS BUILD ACROSS THE GREAT LAKES.
BUT MILD TEMPERATURES WILL KEEP RAIN IN THE FORECAST FOR THE LOWER VALLEYS. CAA WILL BRING COOLER TEMPERATURES TO THE AREA.
LOOKS LIKE TEMPERATURES MAY REMAIN STEADY IN THE LOWER 60S THROUGH THE NIGHT. A LINE OF TSRA/SHRA ACTIVITY WAS NOTED ALONG A COLD FRONT ACROSS EXTREME NORTH MS. WINDS WILL BE NORTHERLY IN THE WAKE OF THE COLD FRONT BUT AN AREA OF LOW PRESSURE MOVING EAST ALONG THE FRONT WL BRING VARIABLE WINDS TO THE SOUTH MONDAY. SHARPENING MID LEVEL RIDGE OFF THE WEST COAST WILL LEAD TO TIGHTENING MID LEVEL HEIGHTS OVER THE ROCKIES AND A STRENGTHENING UPPER LEVEL JET.
41 THE LATEST SURFACE ANALYSES INDICATES LOW PRESSURE OVER THE MID ATLANTIC WITH FRONTAL BOUNDARY ACROSS THE TENNESSEE VALLEY PROMOTING A LOCAL MOIST SW FLOW. ADDITIONAL ENERGY FOR MONDAY WITH LOW PRESSURE DEVELOPING ACROSS THE AREA AS WEDGE BEGINS TO DEVELOP OVER THE CAROLINAS AND INTO NE GEORGIA.
AN AREA OF HIGH PRESSURE IS WORKING SOUTH THROUGH THE RED RIVER VALLEY.
1026 PM EST SUN FEB 21 2016 A WEAK AREA OF LOW PRESSURE MOVING TO THE EAST THROUGH VIRGINIA WILL BRUSH THE SOUTH WITH LIGHT RAIN EARLY THIS EVENING. FINAL SHOWER REMNANTS TRACKING OUT OF THE LOWER SUSQ RIVER VALLEY. CLEARING IS EXPECTED IN THE PRE DAWN HOURS AS THE HIGH GETS CLOSER. EXITING HIGH PRESSURE AREA OVER NEW ENGLAND TUE WILL KEEP SOME COLD AIR DAMMING IN PLACE AGAINST THE EASTERN SIDE OF THE APPALACHIANS AS SOUTHERLY LOW LEVEL FLOW BEGINS TO INCREASE. WITH COOLER AIR ENTRENCHED.
328 PM EST SUN FEB 21 2016 A COLD FRONT WILL PUSH OFFSHORE THIS EVENING AS HIGH PRESSURE BUILDS IN FROM THE NORTHWEST.
THIS EVENING THROUGH MONDAY NIGHT UPPER LEVEL ANALYSIS REVEALS NEARLY STATIONARY UPPER LEVEL LOW PRESSURE NORTH OF THE HUDSON BAY. WHILE AN UPPER TROUGH IS MAKING ITS WAY ONSHORE IN THE PACIFIC NORTHWEST. A COLD FRONT IS BACKED UP INTO WESTERN SD AND WILL BEGIN TO SHIFT EAST AS SLIGHTLY HIGHER THETA-E AIR PUSHES IN TONIGHT. PAC NW TROUGH WILL AMPLIFY AS IT MOVES EAST AND DIGS SOUTH OF THE AREA WITH HIGH AMPLITUDE RIDGE BUILDING IN ONSHORE. TEMPERATURES MONDAY WILL BE WARMER THAN SUNDAY DUE TO HIGHER THETA-E AIR IN PLACE.
THIS WILL HELP TO USHER IN A NORTHWESTERLY FLOW REGIME UPSTREAM OF THE TROUGH. A NEGATIVELY-TILTED INVERTED TROUGH WILL HELP TO GENERATE ON-SHORE FLOW FROM LAKE MICHIGAN.
TONIGHT THROUGH MONDAY NIGHT A RELATIVELY QUIET DAY HAS BEEN SEEN ACROSS THE NATURAL STATE WITH OVERCAST CONDITIONS AS A SLOW MOVING COLD FRONT CONTINUES ITS SLOW MARCH ACROSS THE STATE. AHEAD OF THE FRONT HAVE SEEN TEMPERATURES WARM INTO THE LOWER TO MID 70S WITH DEWPOINTS IN THE 60S.
A LOW PRESSURE SYSTEM WILL BRING A FEW SHOWERS TO NORTHERN NEVADA TONIGHT AND MONDAY.
AN UPPER RIDGE WILL QUICKLY BUILD INTO THE AREA STARTING MONDAY AFTERNOON.
SURFACE ANALYSIS STRETCHES A COLD FRONT ACROSS THE REGION ALONG A LINE FROM WYNNE ARKANSAS NORTHEAST TO CAMDEN TENNESSEE. COLD AIR ADVECTION IN THE WAKE OF THE FRONT WILL ALLOW FOR DECENT COOLING TONIGHT WITH LOWS RANGING FROM THE LOWER 40S NORTH TO LOWER 50S SOUTH. /ISSUED 330 PM CST SUN FEB 21 2016/ A POTENT LOW PRESSURE SYSTEM MID WEEK COULD BRING BOTH A CHANCE OF SEVERE WEATHER AND WINTER WEATHER TO THE MIDSOUTH. A COLD FRONT STRETCHES FROM NEAR CAMDEN TENNESSEE TO WYNNE ARKANSAS. COOLER AIR WILL FILTER INTO THE AREA BEHIND THE FRONT. EXPECT LOWS IN THE LOWER 40S TO AROUND 50 DEGREES. A SERIES OF WEAK LOW PRESSURE CENTERS WILL DEVELOP ALONG THE FRONT.
FORECAST MODELS CONTINUE TO SHOW AN AREAS OF CONVERGENCE ALONG AN INVERTED TROUGH. STRATUS IS EXPECTED TO OVERSPREAD THE FORECAST AREA HELPING TO HOLD TEMPERATURES UP TONIGHT WITH OVERNIGHT LOWS MAINLY IN THE LOWER TO UPPER 20S.
307 PM CST SUN FEB 21 2016 COLD FRONT STILL JUST WEST OF THE REGION. AS LOW PRESSURE OVER EAST TX WRAPS UP MONDAY NIGHT.
318 PM CST SUN FEB 21 2016 High pressure will continue to dominate the weather pattern for our area for the rest of tonight, and with mostly clear skies outside of high thin clouds, providing even slightly cooler overnight lows by early Monday.