Aikyam-Lab/Synoptic-Bench huggingface dataset:
127 AM EDT SAT AUG 1 2015 A WEAK RIDGE OF HIGH PRESSURE WILL BUILD ACROSS THE AREA OVERNIGHT. 05Z SFC ANALYSIS HAD WEAK RIDGE MOVING E W/WEAK COLD FRONT MOVING TOWARD QUEBEC. THE FOCUS FOR SATURDAY DEAL W/UPPER TROUGH & COLD FRONTAL PASSAGE. AND THEN A STRONG UPPER LOW SWINGING EWD ACROSS NEW ENGLAND. TEMPERATURES WILL BE SEASONABLY WARM WITH HIGHS RANGING FROM THE MID 70S TO THE LOWER 80S. A TROUGH DIGGING INTO EASTERN CANADA WILL SET THE STAGE FOR SOME COOLER WEATHER COMING IN DURING THE MID WEEK PERIOD.
WILL SEE A MINOR WARMING FROM YESTERDAY AS THE HIGH INCREASES SLIGHTLY IN STRENGTH. EXPECT A SLOWLY DECAYING UPPER LEVEL RIDGE OVER SE OREGON AND SW IDAHO WITH AN IMPULSE LIFTING NE OVER SW IDAHO SUNDAY NIGHT.
512 AM EDT SAT AUG 1 2015 HIGH PRESSURE OVER THE CENTRAL U. AN UPPER LEVEL TROUGH OVER THE REGION TODAY WILL LIFT FOR SUNDAY.
651 AM EDT SAT AUG 1 2015 HIGH PRESSURE WILL BUILD EAST INTO THE OHIO VALLEY TODAY. THE HIGH WILL GRADUALLY MOVE SOUTHEAST OF THE AREA TONIGHT. AS THE HIGH CONTINUES TO MOVE AWAY FROM OUR REGION. A COLD FRONT WILL APPROACH FROM THE NORTHWEST.
A FEW LOCATIONS NEAR LAKE SUPERIOR WERE IN THE LOWER 60S WITH LIGHT WINDS. AS A WEAK AREA OF LOW PRESSURE AND WARM FRONT MOVES SOUTHEASTWARD THROUGH CENTRAL MN. WITH A COLD FRONT ACROSS THE INTERNATIONAL BORDER SETTING THE STAGE FOR SHOWERS AND THUNDERSTORMS ACROSS THE NORTH. HIGHS WILL BE A LITTLE COOLER ON SUNDAY. WITH HIGHS RANGING FROM THE LOWER 70S IN THE ARROWHEAD TO AROUND 80 FURTHER SOUTH.
AT THE SURFACE, LIGHT SOUTH WINDS WILL BECOME SOUTHERLY AT 12 TO 20 MPH THIS AFTERNOON AS A LEE TROUGH DEVELOPS.
1238 AM CDT SAT AUG 1 2015 HIGH PRESSURE WILL CONTINUE OVER THE AREA THROUGH THE PERIOD.
WHICH WILL LEAD TO MORE DEFINED WARM FRONT. QUESTIONS ABOUND ON WHERE THAT CONVECTION WILL TRACK GIVEN FLOW AND WARM FRONT LOCATION. ESPECIALLY NEAR WARM FRONT GIVEN EXPECTED HIGHER LOW LEVEL SHEAR. STRONGER SHORT WAVE TROUGH IN NORTHWEST FLOW WILL DIVE INTO WESTERN GREAT LAKES BY LATE SUNDAY AND DEPENDING ON WHERE BOUNDARY IS LINGERING. COOLER TEMPERATURES LOOK ON TRACK BEHIND SUNDAYS WAVE AS WELL. MORE SHORT WAVE TROUGHS CROSSING FLATTENING UPPER RIDGE TO THE WEST WILL BRING RAIN THREATS BACK INTO AREA. COOLER AND DRIER FLOW WOULD LIKELY LIMIT ANY SEVERE WEATHER POTENTIAL WITH THAT ACTIVITY BUT WILL HAVE TO WAIT AND SEE.
IN SOME CASES INLAND LOCATIONS WILL BE 10 DEGREES COOLER THAN NORMAL. SYNOPTICALLY THE FLOW ALOFT WILL SWITCH TO THE SW AS AN AREA OF LOW PRESSURE FORMS TO OUR WEST AND SLOWLY ADVANCES TO OUR COAST. SUBTROPICAL MOISTURE IS NOT EXPECTED TO BECOME ENTRAINED IN THE FLOW OF THE LOW SO ONLY IMPACT WILL BE TO DROP TEMPERATURES A FEW ADDITIONAL DEGREES.
A WEAK COLD FRONT HAS STALLED IN THE NORTHERN GULF OR JUST AT THE OUTER EDGE OF THE CWA OVER THE PAST EVENING. NOT MUCH COOL AIR TO WORK WITH BEHIND THE BOUNDARY, HOWEVER WITH THE DRY AIR MASS TEMPS HAVE MANAGED TO FALL INTO THE UPPER 60S AT A FEW LOCATIONS THIS MORNING, HOWEVER MOST AREAS ARE STILL IN THE LOW TO MID 70S.
351 AM CDT SAT AUG 1 2015 THE UPPER LEVEL RIDGE OF HIGH PRESSURE THAT HAS PERSISTED ACROSS THE SOUTHWESTERN U.
724 AM CDT TUE OCT 6 2015 THE 08Z MSL PLOT SHOWS A QUASI-STATIONARY FRONT ON THE HIGH PLAINS FROM SOUTHWEST SOUTH DAKOTA ACROSS EASTERN WYOMING TO A LOW IN SOUTHEAST COLORADO. 9 MICRON IMAGERY SHOWED A BROAD BAND OF LIQUID CLOUDS FROM THE PINE RIDGE AREA TO NORTH PLATTE. RETURN FLOW AS THE COLORADO LOW LIFTS NORTH GENERATES A MOISTURE TRAJECTORY ON THE HIGH PLAINS. THE MOISTURE TRANSPORT VECTORS PAINT A CIRCUITOUS TRAJECTORY FROM THE TEXAS GULF COAST THROUGH NEW MEXICO AND THE HIGH PLAINS INTO WESTERN NEBRASKA WHERE IT IS LIFTED ISENTROPICALLY INTO THE NEBRASKA PANHANDLE AND THE WESTERN SANDHILLS. WEDNESDAY INTO WEDNESDAY NIGHT A WEAK COLD FRONT WILL WORK ACROSS THE AREA.
919 AM MDT TUE OCT 6 2015 UPDATED FOR MORE CLOUDS AND FOG ACROSS THE LOWER ARKANSAS RIVER VALLEY THIS MORNING. UPPER LOW WAS LOCATED VICINITY LAS VEGAS. WITH THE LOW CLOUDS SOUTH OF THE RATON MESA IN NM. CONDITIONS WILL BECOME MORE FAVORABLE FOR SHOWERS/TSRA OVER THE MTNS TODAY AS FLOW BECOMES MORE DIFFLUENT ALOFT AND MOISTURE CONTINUES TO GET ADVECTED NWD AS UPPER LOW MOVES EAST-SOUTHEAST. UPPER LOW WILL START TO MOVE BACK TOWARDS THE S-SW LATER TONIGHT.
AN AREA OF LOW PRESSURE (1010 MB) IS LOCATED OFF THE CAROLINA COAST. WITH A RIDGE OF HIGH PRESSURE COVERING MOST OF THE GULF OF MEXICO. WITH THE CLOSE PROXIMITY OF THE RIDGE AND THE DEPARTING AREA OF LOW PRESSURE.
ISSUED BY NATIONAL WEATHER SERVICE ALBANY NY 1012 AM EDT TUE OCT 6 2015 HIGH PRESSURE WILL MOVE EAST OF NEW ENGLAND THIS AFTERNOON ALLOWING A WEAK COLD FRONT TO MOVE ACROSS THE NORTH COUNTRY ON WEDNESDAY.
BY WED NIGHT SHOULD SEE A BIT MORE SOUTH FLOW AND EXTENSIVE CLOUDS WHICH SHOULD RESULT IN SLIGHTLY WARMER LOWS. SOUTHWEST WINDS AHEAD OF FRONT AND LACK OF SIGNIFICANTLY COOLER AIR IMMEDIATELY BEHIND THE FRONT SHOULD ALLOW FOR A BIG WARMUP. GIVEN RIDGE AXIS AND CLEAR SKIES.
1030 AM EDT TUE OCT 6 2015 LOW PRESSURE OFFSHORE THE COAST OF NORTH CAROLINA WILL MOVE OUT TO SEA THROUGH MID-WEEK.
430 AM PDT TUE OCT 6 2015 UPDATED AVIATION SECTION HIGH PRESSURE ALOFT WILL GRADUALLY BUILD INTO THE REGION THROUGH THE WEEKEND. LARGE UPPER LOW IS SLOWLY MOVING INTO ARIZONA. HGTS WILL BUILD IN THE WAKE OF THE LOW AND MAX TEMPS WILL RISE UP A FEW DEGREES FROM YDYS READINGS BUT WILL STILL BE A DEGREE OR TWO BLO NORMAL. THE RIDGE CONTINUES TO BUILD IN WEDNESDAY AND TEMPERATURES WILL CONTINUE TO CLIMB.
WITH DEPARTURE OF UPPER LEVEL LOW. AND RETURN OF UPPER LEVEL RIDGE ACROSS SOUTHEAST STATES.
THE WATER VAPOR IMAGERY REVEALS RIDGING ALOFT OVER THE SRN PLAINS/LOWER MS VALLEY. WHICH WILL BE FURTHER AMPLIFIED TODAY THROUGH WEDNESDAY AS THE WRN AZ CLOSED LOW CONTINUES ITS SLOW ESE MIGRATION TO NEAR THE AZ/NM/NRN MX BORDER OVER THE NEXT 36 HOURS.
943 AM EDT TUE OCT 6 2015 HIGH PRESSURE FROM THE CENTRAL GREAT LAKES INTO THE PLAINS WILL WEAKEN TODAY AND ALLOW A COLD FRONT TO MOVE THROUGH THE AREA WEDNESDAY. HIGH PRESSURE WILL BUILD IN BEHIND THE FRONT LATE WEDNESDAY AND WEDNESDAY NIGHT.
1010 AM EDT TUE OCT 6 2015 LOW PRESSURE OFF THE SOUTHEAST COAST WILL MOVE OFFSHORE. HIGH PRESSURE WILL BUILD INTO THE MID ATLANTIC REGION TODAY THROUGH THU.
/ISSUED 305 AM CDT TUE OCT 6 2015/ NORTH TEXAS WILL REMAIN UNDER THE INFLUENCE OF AN UPPER RIDGE ONE MORE DAY BEFORE IT BEGINS TO DEAMPLIFY AND MOVE EAST IN RESPONSE TO AN APPROACHING UPPER LOW. THE UPPER LOW.
936 AM EDT TUE OCT 6 2015 WEAK TROF EXTENDING SOUTHWEST ACROSS NORTH FLORIDA FROM STACKED LOW WELL NORTHEAST OF THE REGION WILL CONTINUE TO DRIFT SOUTHWARD AND ALLOW FOR DRIER AIRMASS TO SETTLE OVER THE SE GA/NE FL REGION AND EXPECT AND LINGERING SHOWERS/DRIZZLE ALONG THE COAST THIS MORNING TO PUSH INTO THE COASTAL WATERS THIS AFTERNOON. MORNING OVERCAST CONDS SHOULD BREAK OUT TO PARTLY TO MOSTLY CLOUDY SKIES THIS AFTERNOON WITH HIGHS RANGING FROM THE MIDDLE TO UPPER 70S FOR MOST LOCATIONS EXCEPT FOR INLAND NORTH FLORIDA WHICH SHOULD REACH INTO THE LOWER 80S. SO HAVE DROPPED THE HIGH SURF/FLOOD ADVISORY ALONG WITH DOWNGRADING TO MODERATE RISK OF RIP CURRENTS WITH THE MORNING UPDATE OF THE COASTAL HAZARD MESSAGE.
/issued 348 AM CDT TUE OCT 6 2015/ An upper low can be seen on IR this morning over Srn CA.
1054 AM CDT TUE OCT 6 2015 UPPER LEVEL RIDGE EXTENDS NORTH THROUGH THE SOUTHERN PLAINS WITH WEAK NORTHWEST FLOW ACROSS THE MIDSOUTH. TEMPS ARE CLIMBING THROUGH THE MID 70S ON THEIR WAY TO THE LOWER AND MID 80S THIS AFTERNOON.
/ISSUED 258 AM CDT TUE OCT 6 2015/ UPPER LEVEL RIDGING PERSISTS ACROSS THE REGION AGAIN THIS MORNING. AS WE REMAIN CAUGHT BETWEEN AN UPPER TROF TO OUR E AND A CLOSED UPPER LOW OVER AZ TO OUR W. AND WE WILL CONTINUE TO SEE THIS AS THE UPPER RIDGE REMAINS IN PLACE THROUGH WEDNESDAY.
1206 PM EDT TUE OCT 6 2015 HIGH PRESSURE FROM THE CENTRAL GREAT LAKES INTO THE PLAINS WILL WEAKEN TODAY AND ALLOW A COLD FRONT TO MOVE THROUGH THE AREA WEDNESDAY. HIGH PRESSURE WILL BUILD IN BEHIND THE FRONT LATE WEDNESDAY AND WEDNESDAY NIGHT.
1010 AM CDT TUE OCT 6 2015 WX MAP SHOWS HIGH PRESSURE OVER THE CENTRAL U. CONTINUING TO RIDGE SOUTH. THE ANTICIPATED MODERATING TREND IN TEMPERATURES IS ALREADY APPARENT EARLY THIS MORNING WITH VALUES RUNNING ABOUT 8 TO 12 DEGREES WARMER THAN THIS TIME LAST NIGHT. WITH READINGS IN THE LOWER 60S TO AROUND 70. LATEST UA ANALYSIS AND WV IMAGERY SHOWS RIDGING OVER THE REGION. FLANKED BY AN AREA OF LOW PRES SPINNING OVER SRN CA AND ANOTHER CLOSED LOW OFF THE SE COAST. AS THE UPR RIDGE CONTINUES EAST.
BUT A LOW LEVEL TROF ACROSS NORTHWEST ALABAMA WILL HELP TURN THE WIND FLOW TO A MORE NORTHERLY DIRECTION THIS AFTERNOON. 16 HIGH PRESSURE. /ISSUED 643 AM CDT TUE OCT 6 2015/ WITH DEPARTURE OF UPPER LEVEL LOW. AND RETURN OF UPPER LEVEL RIDGE ACROSS SOUTHEAST STATES.
740 AM EDT TUE OCT 6 2015 HIGH PRESSURE REMAINS OVER NORTHERN NEW ENGLAND THROUGH LATE TODAY.
1118 AM EDT TUE OCT 6 2015 HIGH PRESSURE REMAINS OVER NORTHERN NEW ENGLAND THROUGH LATE TODAY.
HIGH PRESSURE CENTERED TO THE SOUTH WILL MAINTAIN SOUTH WINDS, AREAS OF FOG, AND LOW CLOUDS OVER THE COASTAL WATERS TODAY.
628 AM CDT TUE OCT 6 2015 THE 08Z MSL PLOT SHOWS A QUASI-STATIONARY FRONT ON THE HIGH PLAINS FROM SOUTHWEST SOUTH DAKOTA ACROSS EASTERN WYOMING TO A LOW IN SOUTHEAST COLORADO. 9 MICRON IMAGERY SHOWED A BROAD BAND OF LIQUID CLOUDS FROM THE PINE RIDGE AREA TO NORTH PLATTE. RETURN FLOW AS THE COLORADO LOW LIFTS NORTH GENERATES A MOISTURE TRAJECTORY ON THE HIGH PLAINS. THE MOISTURE TRANSPORT VECTORS PAINT A CIRCUITOUS TRAJECTORY FROM THE TEXAS GULF COAST THROUGH NEW MEXICO AND THE HIGH PLAINS INTO WESTERN NEBRASKA WHERE IT IS LIFTED ISENTROPICALLY INTO THE NEBRASKA PANHANDLE AND THE WESTERN SANDHILLS. WEDNESDAY INTO WEDNESDAY NIGHT A WEAK COLD FRONT WILL WORK ACROSS THE AREA.
UPPER RIDGE WILL REMAIN THE MAIN WEATHER FEATURE TODAY RESULTING IN QUIET WEATHER. CLOUD COVER IS PROG TO BE THINNER TODAY OWING TO LOCATION OF A MID LEVEL RIDGE AXIS.
1031 AM CDT TUE OCT 6 2015 LIGHT NORTHERLY WINDS ARE EXPECTED TO PERSIST THROUGH THE REMAINDER OF THE DAY WITH SURFACE RIDGING DOMINATING MUCH OF TEXAS. THIS WX PATTERN CHANGE REMAINS COURTESY OF THE DEEP UPPER LOW MOVING ACROSS NORTH- ERN MEXICO TOWARD THE TX BIG BEND. WHEN MODELS THEN BEGIN TO RETROGRADE THIS UPPER LOW BACK TO THE WEST. THIS SHIFT SHOULD ALL- OW FOR THE REDEVELOPMENT OF THE UPPER RIDGE OVER SE TX BY THE WEEK END. 41 HIGH PRESSURE OVER THE CENTRAL PLAINS WILL MOVE EAST TONIGHT.
1107 AM EDT TUE OCT 6 2015 LOW PRESSURE OFF THE SOUTHEAST COAST WILL MOVE OFFSHORE. HIGH PRESSURE WILL BUILD INTO THE MID ATLANTIC REGION TODAY THROUGH THU.
WEAK COLD FRONT DROPS THROUGH TONIGHT SHIFTING WINDS TO A MORE NRLY COMPONENT FOR WEDNESDAY. ALL OF THE GUIDANCE IS BULLISH WITH CLEARING OUT THE LOW LEVEL MOISTURE THIS MORNING. SO WILL BANK ON THE STRONGER SUNSHINE TO STILL DO IT/S JOB WITH MIXING OUT THE LOW STUFF. COOLER EAST/WARMER WEST.
642 AM CDT TUE OCT 6 2015 A COLD FRONT WAS MOVING THROUGH THE NORTHLAND WITH ZONAL FLOW ALOFT HELPING IT PROGRESS EASTWARD. HIGH PRESSURE WILL NOSE INTO THE REGION FROM THE NORTHWEST THROUGH THE DAY HELPING TO DECREASE THE CLOUDS. THE HIGH WILL MOVE OVER MINNESOTA TONIGHT AND LIGHT WINDS AND MAINLY CLEAR SKIES WILL OCCUR. HIGHS WILL RANGE FROM THE LOWER FIFTIES ALONG THE NORTH SHORE OF LAKE SUPERIOR TO THE LOWER SIXTIES FROM THE BRAINERD LAKES TO PARK FALLS. SLIGHTLY COOLER THROUGH THE END OF THE WORK WEEK THEN A MILD AND DRY WEEKEND.
DRY AND HOT FOR THE END OF THE WEEK AS HIGH PRESSURE BUILDS ALOFT AND WEAK OFFSHORE WINDS DEVELOP AT THE SURFACE. WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER- LEVEL CUT-OFF LOW CENTERED OVER THE NV/CA/AZ BORDER. AND AN UPPER-LEVEL RIDGE OFF THE WEST COAST AND INTO NORTHERN CA. HEIGHTS ALOFT WILL RISE THROUGH THE END OF THE WEEK AS THE RIDGE TO OUR WEST BUILDS OVER CENTRAL CA.
1003 AM EDT TUE OCT 6 2015 A COLD FRONT WILL RETURN RAIN CHANCES AND SEASONABLY COOL TEMPERATURES TO THE UPPER OHIO REGION FOR THE CLOSE OF THE WEEK. A WARMED ATMOSPHERIC COLUMN IN ADVANCE OF A WRN GREAT LAKES TROUGH SHOULD BE SUFFICIENT TO SUPPORT HIGH TEMPS A FEW DEGREES ABOVE THE AVERAGES TODAY.
1158 AM CDT TUE OCT 6 2015 BROAD HIGH PRESSURE AT SFC AND ALOFT RESULTING IN VFR SKC AND LGT WIND CONDITIONS ACROSS THE AREA. THE WATER VAPOR IMAGERY REVEALS RIDGING ALOFT OVER THE SRN PLAINS/LOWER MS VALLEY. WHICH WILL BE FURTHER AMPLIFIED TODAY THROUGH WEDNESDAY AS THE WRN AZ CLOSED LOW CONTINUES ITS SLOW ESE MIGRATION TO NEAR THE AZ/NM/NRN MX BORDER OVER THE NEXT 36 HOURS.
730 AM EDT TUE OCT 6 2015 HIGH PRESSURE WILL SLIDE EAST TODAY ALLOWING A WEAK COLD FRONT TO MOVE ACROSS THE NORTH COUNTRY ON WEDNESDAY BUT REMAINING DRY WITH THE EXPECTION OF A FEW NORTHERN MOUNTAIN SPRINKLES.
CHATTANOOGA AIRPORT, TN 81 60 83 60 / 10 10 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 81 56 80 58 / 0 0 0 0 OAK RIDGE, TN 82 57 81 59 / 0 0 0 0 TRI CITIES AIRPORT, TN 79 49 78 54 / 0 0 0 0.
1020 AM EDT TUE OCT 6 2015 MORNING COASTAL SHOWERS CONTINUE OFFSHORE OF THE SUNCOAST AND SOUTHWEST FLORIDA WHERE THE LOWER AND MID LEVEL TROUGH AXIS CONTINUES TO MEANDER. ACTIVITY SHOULD SHIFT SOUTHWARD ALONG WITH THE TROUGH AND ADDITIONAL SHOWERS COULD DEVELOP THIS AFTERNOON OVER SOUTHWEST FLORIDA AS SOME VORTICITY SWINGS AROUND THE 500 MB TROUGH OVER SOUTHERN FLORIDA LATER TODAY. AN AREA OF WEAK LOW PRESSURE WILL THEN REMAIN SOUTH OF THE REGION. WITH HIGH PRESSURE TO THE NORTH.
706 AM EDT TUE OCT 6 2015 HIGH PRESSURE WILL SLIDE EAST TODAY ALLOWING A WEAK COLD FRONT TO MOVE ACROSS THE NORTH COUNTRY ON WEDNESDAY BUT REMAINING DRY WITH THE EXECPETION OF A FEW NORTHERN MOUNTAIN SPRINKLES.
735 AM EDT TUE OCT 6 2015 THE UPPER LOW HAS DRIFTED NORTHEAST OFF SHORE JUST EAST OF THE CAROLINAS. THERE WILL BE A WARMING TREND WITH DIMINISHING CLOUD COVER AND RIDGING ALOFT TODAY AND WEDNESDAY. 41 PATTERN STILL DOMINATED BY NW FLOW ALOFT AS SW CONUS UPPER LOW GETS CUTOFF FROM WESTERLIES AND SINKS SOUTH.
CURRENT CONDITIONS ACROSS THE AREA FEATURE A WEAK TROUGH CROSSING THE MS RIVER VALLEY AT THIS TIME BRINGING SOME UPPER LEVEL CLOUD COVER INTO THE AREA. HIGH PRESSURE CENTERED OVER THE UPPER GREAT LAKES CURRENTLY TAKES AIM AT SETTING UP OVER THE AREA IN THE COMING DAY. THE WEAK TROUGH WILL MOVE THROUGH TO THE NORTH BRINGING ONLY SOME CLOUD COVER TO THE AREA. HIGH PRESSURE WILL SET UP OVER THE GREAT LAKES AND EXTEND SOUTH INTO THE EAST KENTUCKY AREA. THE SAME SEEMS TO BE TRUE FOR WEDNESDAY MORNING AS WELL BUT WITH INCREASED CLOUD COVER DUE TO THE WEAK TROUGH MOVING THROUGH. HIGH PRESSURE IN CONTROL THROUGH THE SHORT TERM AND A LACK OF A GRADIENT WILL MEAN FOR NORMAL TEMPERATURE VALUES AND LIGHT WINDS. THIS WILL ALLOW A COLD FRONT TO SWEEP SE.
Cold front will continue to push southeast through the region this afternoon. An upper level trof axis moving southeast across the Plains this morning continued to push a cold front southeast through Eastern Oklahoma and Northwest Arkansas. the remaining showers and thunderstorms will continue to weaken and dissipate through the afternoon hours as the cold front progresses southeast through the region. Behind the cold front. while cooler and drier air begins to filter into the region behind the front.
314 PM CDT FRI SEP 11 2015 WX MAP SHOWS COLD FRONT JUST CROSSING THE RED RIVER OF N TX THIS AFTERNOON. CLEARING SKIES AND MUCH DRIER AND COOLER AIR WILL FOLLOW LATER THAT AFTERNOON AND EVENING. EXPECTED LOWS WILL FALL INTO THE LOWER 60S ACROSS SE TX TO THE MID 50S ACROSS C LA FOR SUN & MON MORNINGS. WITH THE HIGHEST POPS EXPECTED BY TUE AND WED AFTERNOON WITH THIS RETURN SURGE OF MOISTURE. THIS IS DUE TO IT SHOWING THE MOISTURE BECOMING MORE ENTWINED WITH A BROAD TROF OR LOW POSSIBLE ACROSS THE BAY OF CAMPECHE OR W CARIBBEAN. DML A SERIES OF DISTURBANCE ROTATING THROUGH AN UPPER LEVEL TROUGH THROUGH THE NORTHWEST GULF OF MEXICO WILL TRIGGER WIDESPREAD SHOWERS AND THUNDERSTORMS TONIGHT AHEAD OF A COLD FRONT WHICH SHOULD MOVE INTO THE COASTAL WATERS EARLY SATURDAY.
200 PM EDT FRI SEP 11 2015 A COLD FRONT APPROACHES TONIGHT INCREASING THE CHANCE FOR RAIN.
1125 AM MDT FRI SEP 11 2015 NOAM UPPER AIR WX PATTERN SIMILAR TO 24 HOURS AGO WITH RIDGING OFF EACH COAST ALLOWING LOW PRESSURE TO CARVE OUT A TROUGH ACROSS THE MIDDLE OF THE CONTINENT. A COLD FRONT IS BEING ACCELERATED SOUTHWARD ACROSS THE CENTRAL PLAINS BY STRONG CONVECTION. THE WESTERN END OF THE FRONT WILL HAVE CLEARED THE THE HIGH PLAINS OF COLORADO AND HEADED WELL INTO TEXAS BY SUNRISE. MOISTURE BEHIND THE FRONTAL PASSAGE LOOKS TO PUSH ACROSS THE LOWER PASSES OF THE NEW MEXICO ROCKIES AND BEGIN TO RETURN NORTHWARD TOMORROW NIGHT.
220 PM CDT FRI SEP 11 2015 COLD FRONT CONTINUES TO MAKE STEADY PROGRESS INTO OUR NW ZONES THIS AFTERNOON AND AS OF 19Z WAS LOCATED NEAR A CKM.
239 PM CDT FRI SEP 11 2015 Large upper trof will deepen over the eastern conus next 36 hours, then move east, with a transition from zonal to SW flow expected late in the weekend as the trof moves east.
An amplifying upper level trough covers a bit more than the eastern half of the CONUS this afternoon. Further west, a stronger cold front is draped through the Lower Mississippi Valley through the Tennessee Valley. Later tonight, the longwave trough will amplify enough to bring deep layer southwesterly flow well into the Gulf.
COOL HIGH PRESSURE PREVAILS TODAY. HIGH PRESSURE AND AND MOSTLY CLEAR SKIES SHOULD ALLOW FOR GOOD RADIATIONAL COOLING TONIGHT. WITH HIGH PRESSURE SHIFTING EAST OF THE AREA SATURDAY.
259 PM MDT FRI SEP 11 2015 WATER VAPOR IMAGERY SHOWING HIGH PRESSURE ALOFT BUILDING INLAND ACROSS MUCH OF THE WEST COAST WITH A RESULTANT MODERATE NORTHWEST FLOW ALOFT. MAINLY CLEAR SKIES TONIGHT WILL LEAD TO A BIT COOLER TEMPERATURES BY SAT AM. SATURDAY WILL BE MOSTLY SUNNY WITH WARMER TEMPERATURES AS HIGH PRESSURE CONTINUES TO BUILD OVER THE REGION.
255 PM EDT FRI SEP 11 2015 A NARROW RIDGE OF HIGH PRESSURE WILL LOSE ITS FAIR WEATHER INFLUENCE ON THE REGION LATER TONIGHT. FAIR AND WARMER CONDITIONS WILL RETURN TO START THE WORK WEEK. MID AND HIGH CLOUDS ALREADY THICKENING UP OVER CENTRAL AND NORTHEAST OHIO AS UPPER TROF SWINGS THROUGH THE MIDWEST.
312 PM PDT FRI SEP 11 2015 STRONG HIGH PRESSURE OVER THE REGION WILL PROVIDE ABOVE NORMAL TEMPERATURES THROUGH SATURDAY.
High pressure will gradually build south today from the Northern Plains into Kansas as the upper trough axis moves into the mid mississippi valley today and tonight. Cold advection will keep high temperatures below normal today with temperatures in the lower to middle 70s expected. Lows tonight will range from the mid 40s in northeast Kansas to the lower 50s in north central Kansas.
OUR FOCUS SHIFTS TO THE WEST AS AN APPROACHING COLD FRONT HAS SPARKED A BAND OF SHOWERS AND THUNDERSTORMS. THE COLD FRONT IS CURRENTLY EXTENDING JUST WEST TO NASHVILLE AND NORTHEAST THROUGH CENTRAL KY. WHILE THE COLD FRONT CONTINUES TO SHIFT EASTWARD DURING THE DAY TOMORROW. A MUCH COOLER HIGH PRESSURE AIRMASS WILL DROP DOWN FROM CANADA AND BEGIN TO SHIFT EASTWARD TOWARD THE KENTUCKY UNDER GENERALLY NRLY FLOW. UPPER LEVEL HEIGHTS WILL DROP CONSIDERABLY AS A STRONG UPPER LEVEL CLOSED LOW SHIFTS SOUTH ACROSS THE OHIO RIVER VALLEY. THIS WILL ALSO AID IN PULLING MUCH COOLER CANADIAN AIR INTO THE REGION. THE SOMEWHAT NEGATIVELY TILTED UPPER LEVEL LOW WILL CREATE SOME INSTABILITY ALONG ITS LEADING EDGE. DESPITE THE MUCH COOLER TEMPERATURES. PRECIP CHANCES ARE EXPECTED TO CONTINUE THROUGHOUT THE DAY AS A RESULT OF THIS UPPER LEVEL TROUGH PASSAGE ACROSS THE REGION.
Much of this area should remain dry this afternoon, but the wind trajectory off Lake Michigan will combine with the trough to keep clouds and some showers lingering across the east through the afternoon. A cold front at the surface has pushed southward to around I-64 however convergence aloft due to the interaction of the above features is triggering numerous thunderstorms across central IL. Highs today will only reach the lower 70s given the cooler post frontal air mass which has moved in. Much cooler temperatures expected this weekend due to strong upper level trof/low pressure digging southward from the western great lakes into IL/IN and ohio river valley through Saturday.
HIGH PRESSURE WILL SLOWLY MOVE OUT AND MAKE WAY FOR SOUTHERLY RETURN FLOW.
249 PM CDT FRI SEP 11 2015 A SLOW MOVING COLD FRONT WILL PUSH INTO NORTHWEST ALABAMA THIS EVENING AND TRACK SOUTHEAST ACROSS CENTRAL ALABAMA OVERNIGHT. A HIGHLY AMPLIFIED LATE SUMMER UPPER TROF WILL DEVELOP OVER THE EASTERN UNITED STATES THIS WEEKEND.
TEMPERATURES WILL CHANGE LITTLE TODAY WITH HIGHS IN THE LOW TO MID 60S. COMBINATION OF CAA/CLOUDS/SHOWERS SHOULD RESULT IN HIGHS TODAY ABOUT 10F COOLER THAN YDAY. A SHORT WAVE TROF IN THE LONG WAVE PATTERN WILL DROP SOUTH INTO THE BASE OF THE LARGER TROF AND SHOULD DEEPEN THE TROF EARLY THIS WEEKEND.
RAIN SHOWERS WILL WORK ACROSS THE REGION THIS EVENING IN WAKE OF A COLD FRONT. MUCH COOLER AIR WILL FILTER IN FOR THE WEEKEND BEHIND THIS FRONT.
HIGH PRESSURE WILL MAINTAIN WARM AND DRY CONDITIONS THROUGH SATURDAY.
This is a few hours ahead of schedule, outpacing even the most recent runs of the high-res models. The low level flow is a bit jostled right now, with a series of boundaries lingering the leading convection. This will usher is a much cooler and drier airmass.
A ridge of high pressure will continue to be the dominant feature over the Northern Rockies through Saturday causing warm and dry conditions.
310 PM PDT FRI SEP 11 2015 Some cooling over the weekend with a threat of afternoon showers and thunderstorms over the higher terrain.
AS LOW PRESSURE PASSES SOUTH OF THE CWA AND INTO THE BAY OF FUNDY AND CANADIAN MARITIME PROVINCES, A FEW LIGHT SHOWERS COULD LINGER RIGHT ALONG THE BORDER, MAINLY SOUTH OF HOULTON. HOWEVER, LOW CLOUDS WILL PROBABLY LINGER THRU THE NIGHT BEFORE BREAKING UP AS HIGH PRESSURE BUILDS INTO THE CWA.
1250 PM CDT FRI SEP 11 2015 HIGH PRESSURE WAS THE DOMINANT SURFACE FEATURE ON THE PLAINS THIS MORNING. WITH HIGH PRESSURE CONTINUING OVER THE CENTRAL AND NORTHERN PLAINS THROUGH TONIGHT. UPPER LEVEL SYNOPTIC PATTERN BEGINS TO DEAMPLIFY OVER THE CENTRAL CONUS DURING THE WEEKEND AS THE RIDGE BREAKS DOWN AND FLOW BECOMES ZONAL.
A TROUGH IS DIGGING SOUTHWARD OVER THE MISSISSIPPI VALLEY WHILE A BURST OF CONVECTION IS MOVING EAST OF THE TEXAS COAST. HIGH PRESSURE IN CONTROL OVER THE KEYS WILL BE SHOVED TO THE NORTHEAST AHEAD OF THE TROUGH DIGGING THROUGH THE MISSISSIPPI VALLEY. WITH THE RIDGE IN PLACE EXPECT ANOTHER DAY OF ABOVE NORMAL TEMPERATURES.
THIS MORNING'S UPDATE REVOLVES AROUND THE APPROACHING COLD FRONT AND THE TIMING OF PRECIPITATION THAT WILL ACCOMPANY IT. AND DON'T FORGET ABOUT THE WRAP AROUND ACTIVITY SATURDAY DUE TO THIS SHARP UPPER LEVEL TROUGH THAT WILL DIVE INTO THE TENNESSEE VALLEY LATER SATURDAY MORNING.
254 PM EDT FRI SEP 11 2015 A NARROW RIDGE OF HIGH PRESSURE WILL LOSE ITS FAIR WEATHER INFLUENCE ON THE REGION LATER TONIGHT. FAIR AND WARMER CONDITIONS WILL RETURN TO START THE WORK WEEK. MID AND HIGH CLOUDS ALREADY THICKENING UP OVER CENTRAL AND NORTHEAST OHIO AS UPPER TROF SWINGS THROUGH THE MIDWEST.
In the wake of the MCS there is still plenty of deep moisture in place, broad cyclonic flow aloft, and the approach and passage of a strong cold front. Saturday morning should be okay other than cloud cover but models are now dropping and digging an H5 trough southward across the eastern half of the area Saturday afternoon. From Saturday night on with high pressure overspreading the area, there should be little to no cloud cover with a dramatic decrease in temperatures.
500 MB TROUGH DROPS ACROSS THE GREAT LAKE STATES TODAY.
WE SHOULD SEE THE NEXT ROUND OF CLOUDS MOVING IN FROM THE EAST IN ANTICIPATION FOR PRECIP AHEAD OF AN APPROACHING COLD FRONT. UNSETTLED WEATHER IS IN STORE THROUGH THE PERIOD AS AN UPPER TROUGH AMPLIFIES OVER THE EASTERN CONUS. A STRONG COLD FRONT ASSOCIATED WITH THE TROUGH WILL PASS THROUGH THE REGION THIS EVENING. THE WEATHER WILL RESEMBLE A COOL SEASON SCENARIO WITH COLD AIR ADVECTION AND UPSLOPE FLOW UNDER THE UPPER TROUGH ALLOWING SHOWERS TO LINGER TONIGHT. ANOTHER DISTURBANCE ROTATING THROUGH THE UPPER TROUGH WILL BRING ANOTHER INCREASE IN SHOWERS AND POSSIBLY THUNDERSTORMS ON SATURDAY.
A COLD FRONT WILL SWEEP ACROSS THE AREA TONIGHT. FOLLOWED BY A SHOT OF MUCH COOLER AIR. AS A SHARP UPPER TROUGH DIGS IN ACROSS THE AREA.