Aikyam-Lab/Synoptic-Bench huggingface dataset:
HIGH PRESSURE FRIDAY INTO FRIDAY NIGHT SHOULD LEAD TO CLEARING SKY AND TEMPS BELOW NORMAL VALUES.
TEMPERATURES ARE IN THE LOW TO MID 60S. A WEAK AREA OF HIGH PRESSURE IS INVADING FROM THE NORTHWEST. A LARGE UPPER LEVEL DISTURBANCE IS OFF THE SOUTHERN CALIFORNIA COAST WITH A RIDGE OF HIGH PRESSURE OVER THE NORTHWESTERN UNITED STATES. INCREASED CLOUD COVER IS FORECAST AS THE UPPER LEVEL LOW'S INFLUENCE MOVES SLIGHTLY CLOSER. ONCE THE HIGH PASSES. A LEE TROUGH BEGINS TO DEVELOP OVER SOUTHEAST COLORADO. WARMER TEMPERATURES ARE EXPECTED WITH HIGHS TOPPING OUT IN THE LOW TO MID 70S.
WITH FREEZING LEVELS DROPPING. EXPECT TO SEE SNOW SHOWERS OVER SOME OF THE HIGHER TERRAIN WITH SOME LOCALIZED LIGHT ACCUMULATIONS POSSIBLE. WILL ALSO SEE FREEZING TEMPERATURES OVER THE HIGHER ELEVATIONS OF SW VA. SOME OF THE HIGHEST PEAKS COULD SEE SNOW SHOWERS EVEN DURING THE DAY ON FRIDAY.
HIGH TEMPERATURES WILL REACH INTO THE LOW TO MID 40S TODAY. THE LAST IN THE SERIES OF MID/UPPER LEVEL TROUGHS IS CURRENTLY WORKING SOUTHEASTWARD ACROSS THE SOUTHERN GREAT LAKES AND HAS BEEN RESPONSIBLE FOR UPSWING IN LIGHT SCATTERED RAIN/SHOWER ACTIVITY THIS MORNING. MUCH DISCUSSION ABOUT WHETHER TO ISSUE HEADLINES FOR THE SUB- FREEZING TEMPERATURES THIS WEEKEND BASED ON GROWTH. LOW LEVEL WARM/MOIST ADVECTION IN ADVANCE OF THE LOW SHOULD ALLOW PRECIP TO INITIALLY BE MAINLY LIQUID WITH COLD/DRY AIR ADVECTION FRI AFTN/NIGHT SUPPORTING A TRANSITION TO SNOW.
with spotty shwrs/storms noted across much of the Lower Missouri Vly. skies should clear as sfc ridging becomes better established over the Central Plains. Ridge axis becomes firmly established across the area on Friday with another surge of cold air expected to dive south through the afternoon thanks to the passage of a another cold front during the afternoon.
THE COLD ADVECTION IN THE WAKE OF THE LOW IS QUITE STRONG AND WE SHOULD SEE LOWS DROP INTO THE LOWER 20S.
MODELS HAVE HINTED AT SMALL CHANCES FOR PRECIPITATION OFF AND ON FOR SEVERAL DAYS IN THE VICINITY OF WARM FRONT. AND SUSPECT FORECAST IS SEVERAL DEGREES TOO COOL AHEAD OF THE COLD FRONT WHERE STRONG SOUTHWEST FLOW AND DRY AIR WILL OCCUR. ALSO SUSPECT MAXES MAY BE A BIT COOL FOR TUE-WED GIVEN LACK OF INFLUX OF SIGNIFICANTLY COOLER AIR. WITH HIGHEST GFDI VALUES IN THE LOWER 70S ROUGHLY NORTH OF A LINE FROM LINCOLN TO LOST SPRINGS.
256 PM PDT THU APR 7 2016 A change to a cooler and wetter pattern will begin late Friday and through this weekend as low pressure moves across California and Nevada. High pressure remains over the area today with temperatures creeping up into the upper 70s across western NV. By tomorrow, deeper moisture will arrive into the region as the low pressure over southern CA slowly inches north into the Sierra. As the low moves north Friday night, a deformation zone will set up over the region with areas of localized heavy rainfall possible from Reno-Tahoe eastward to Fallon, Yerington and Hawthorne.
1045 AM PDT THU APR 7 2016 Cooler temperatures today with Delta Breeze. This will keep temps much cooler over the southern Sac/nrn San Joaquin valleys. readings are already running 3-5 degrees cooler versus yesterday. The low pressure area to the southwest of San Diego will move toward SoCal today, nudging the upper ridge over NorCal a little further to the north and east, and spreading clouds further north with time. Second upper low will approach California from the Pacific Friday, lifting sub-tropical moisture northward over the state.
A MIX OF SNOW OR POCKETS OF VERY LIGHT/TEMPORARY FREEZING RAIN WILL ALSO BE POSSIBLE. THANKS TO COOL CANADIAN HIGH PRESSURE MOVING IN. ASSISTED BY A SFC COLD FRONT SINKING OVERHEAD. HAVE GONE ON THE LOW END OF GUIDANCE AT THIS POINT.
At 2 PM, a cold front was near a Haskell/Throckmorton line, then extended southwest along the I-20 corridor into the Permian Basin. The cold front currently moving into west central Texas will shift winds currently out of the southwest to the northeast this evening and tonight. However, lows tonight will actually be warmer as the winds behind the front will limit radiational cooling, and temperatures are only expected to get down into the lower to mid 50s. Temperatures will be 5 to 10 degrees cooler Friday with highs mainly in the mid to upper 70s.
Drier and somewhat cooler air will move into the region this evening behind a cold front.
A DRY COLD FRONT DISCUSSED PREVIOUSLY WILL PUSH SOUTHWARD ACROSS THE FORECAST AREA AND BRING COOLER AND DRIER AIR. BUT THE LOW LEVEL THERMAL TROUGH ASSOCIATED WITH THE DEEP EASTERN CONUS TROUGH WILL JUST GIVE A GLANCING SHOT TO THE FORECAST AREA.
Cooler air will filter into the region with H85 temperatures down a little from yesterday with values ranging a little below 10C across central Kansas to near 15C in extreme southwest Kansas. Look for highs only up into the mid to upper 60s across central Kansas to the lower 70s(F) closer to the Oklahoma border. Dry conditions can be expected to continue through much of the weekend as medium range models indicate weak upper level ridging moving slowly east out of the Central and Southern Rockies into the Western High Plains during the period.
/ISSUED 402 AM EDT THU APR 7 2016/ THE SYNOPTIC CONDITIONS EARLY THIS MORNING INCLUDE A COLD FRONT MOVING INTO THE FLORIDA PANHANDLE WITH THE WARM SECTOR ACROSS THE EASTERN GULF. MAINTAINING MOISTURE IN THE LOWER LEVELS WITH CLOUDINESS AND LIGHT TO MODERATE SHOWERS ACROSS THE REGION. THE COLD FRONT IS EXPECTED TO CONTINUE MOVING SOUTHEAST ACROSS THE FLORIDA PENINSULA AND EASTERN GULF TODAY WITH THE WARM SECTOR LIFTING NORTHEAST. BY 18Z TODAY THE COLD FRONT WILL LIKELY BE IN NORTH CENTRAL FLORIDA. A DRYING TREND IS STILL EXPECTED LATE TODAY AND TONIGHT WITH THE COLD FRONT EXPECTED TO PASS INTO THE FLORIDA STRAITS LATER TONIGHT. A SECONDARY COLD FRONT IS THEN FORECAST TO APPROACH THE ATLANTIC SEA BOARD AND NORTH FLORIDA AROUND 12Z FRIDAY AND CONTINUE TO PASS INTO THE PENINSULA INTO FRIDAY NIGHT WHILE REMAINING DRY.
234 PM CDT THU APR 7 2016 There is a broad upper level trough over the eastern conus that is centered over the Great Lakes, and there is an upper low just off the coast of southern California. A cold front is currently moving southward across West Texas with winds already becoming gusty out of the northeast across Lea and Eddy Counties as well as the northern Permian Basin. The upper trough off the west coast will start to allow for moisture to move over New Mexico and West Texas as the trough expands eastward on Friday.
SLIGHTLY COOLER TEMPERATURES FOR FRIDAY AND ALSO MUCH LESS WIND. BASICALLY A MUCH QUIETER WEATHER DAY FOR FRIDAY WITH THE RIDGE IN CONTROL.
A TROUGH OF LOW PRESSURE WAS LOCATED NEAR INTERSTATE 35. A SHORT WAVE TROUGH. HIGH PRESSURE WILL BUILD ACROSS THE REGION. THIS IS DUE TO THE UNCERTAINTY ON WHEN THE 925 TO 850 MB RIDGE AXIS WILL SLIDE THROUGH THIS AREA. IT WOULD CAUSE THE LOW TEMPERATURES TO BE WARMER.
AN UPPER LOW EJECTING NE FROM THE ERN PACIFIC IS SENDING ABUNDANT HIGH CLOUDS OUR DIRECTION AND MODELS HAVE A GOOD INITIALIZATION OF THIS MID TO HIGH LEVEL MOISTURE AND ITS LIKELY IMPACT ON OVERNIGHT LOWS OVER THE WESTERN ONE-THIRD OF SOUTH CENTRAL TEXAS. THE HIGH CLOUDS SHOULD CONTINUE TO IMPACT TEMPS FOR DAYTIME FRIDAY WITH THE EXTENT REACHING ALL AREAS. THIS SHOULD RESULT IN A TEMPS A 1-4 DEGREES COOLER THAN THE EXPECTED HIGHS FOR TODAY.
ISSUED BY NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 327 PM EDT THU APR 7 2016 A COLD FRONT WILL MOVE ACROSS THE REGION TONIGHT.
223 PM EDT THU APR 7 2016 A WEAK COLD FRONT WILL MOVE THROUGH THE AREA OVERNIGHT. COLD HIGH PRESSURE WILL BUILD OVER THE AREA FOR THE WEEKEND WITH WELL BELOW NORMAL TEMPERATURES.
TRAILING FRONTAL TROF EXTENDING DOWN THE ERN SEABOARD INTO THE FL STRAITS WILL PUSH OFFSHORE OVERNIGHT.
347 PM CDT THU APR 7 2016 WINDS WILL QUICKLY DISSIPATE AT SUNSET AS HIGH PRESSURE SETTLES SOUTH ACROSS CENTRAL KS. THIS WILL SET THE STAGE FOR DECENT RADIATIONAL COOLING WITH LOWS FALLING INTO THE LOW TO MID 30S FOR MANY LOCATIONS WHERE PATCHY FROST MAY DEVELOP AFTER 08-10Z. AS HIGH PRESSURE TRANSLATES EAST OF THE AREA FRIDAY NIGHT LOW LEVEL EAST/SOUTHEAST WINDS WILL RETURN TO THE AREA KEEPING LOWS FROM BOTTOMING OUT WITH READINGS MOSTLY IN THE UPPER 30S/AROUND 40. LOW PRESSURE WILL DEEPEN OVER THE CENTRAL HIGH PLAINS ON SAT ALLOWING BREEZY SOUTHERLY FLOW TO RETURN TO THE AREA.
ALONG WITH SOME FREEZING TEMPERATURES. 850MB TEMPERATURES OF -6 TO -8 DEGREES MAY VERY WELL LEAD TO OVERNIGHT LOWS FRIDAY NIGHT JUST BELOW FREEZING. CLOUDS AND HOW MUCH WIND WE'LL HAVE THAT NIGHT MAY VERY WELL CURB FROST CONCERNS BUT TEMPERATURES SHOULD STILL FALL INTO THE LOWS 30S.
15 UTC surface analysis shows the cold front moving through the southeastern portion of the forecast area. With the cold front moving through, continue to expect a dry day with temperatures warming into the mid to upper 70s across the region.
HIGH TEMPS WILL WARM INTO THE LOWER 80S ACROSS THE EASTERN HALF OF THE FORECAST AREA UNDER WEST FLOW TO THE UPPER 70S INLAND. LOW/MID CLOUDS WILL ALSO INCREASE OVER OUR NORTHERN GA ZONES FROM THE NORTH AHEAD OF A DRY SURFACE COLD FRONT WHICH WILL PUSH SOUTHWARD ACROSS OUR GA ZONES LATE TONIGHT/EARLY FRI AND ACROSS NE FL THROUGH FRIDAY. DRIER AND COOLER AIR WILL FILTER IN BEHIND THE FRONT AND BRING LOWS ON FRIDAY NIGHT INTO THE MID 40S FOR MOST INLAND LOCATIONS.
A DRY COLD FRONT HAS STRUGGLED TO MAKE LITTLE PROGRESS INTO THE STATE TODAY.
A SERIES OF PACIFIC STORM SYSTEMS WILL MOVE INTO THE REGION BEGINNING TODAY BRINGING COOLER TEMPERATURES AND INCREASING CHANCES FOR RAIN AND MOUNTAIN SNOW TO MUCH OF THE SOUTHERN GREAT BASIN AND MOJAVE DESERT.
High pressure and a very warm air mass will persist through Friday.
WE MAY EVEN SEE SOME FREEZING TEMPERATURES. 850MB TEMPERATURES OF -6 TO -8 DEGREES MAY VERY WELL LEAD TO OVERNIGHT LOWS FRIDAY NIGHT JUST BELOW FREEZING. CLOUDS AND HOW MUCH WIND WE'LL HAVE THAT NIGHT MAY VERY WELL CURB FROST CONCERNS BUT TEMPERATURES SHOULD STILL FALL INTO THE LOWS 30S.
WESTERLY SURFACE FLOW HAS PREVAILED OUT AHEAD OF THE NEXT COLD FRONT THAT'S CURRENTLY MOVING SOUTHWARD INTO THE TENNESSEE VALLEY. THAT FRONT WILL MOVE THROUGH OVERNIGHT TONIGHT, WITH COOLER AND DRIER AIR PUSHING SOUTHWARD.
A WEAK COLD FRONT WAS LOCATED ROUGHLY ALONG OR JUST SOUTH OF INTERSTATE 30.
343 PM EDT THU APR 7 2016 LOW PRESSURE OVER THE EASTERN LAKES WILL MOVE INTO QUEBEC OVERNIGHT. A LOW PRESSURE SYSTEM WILL TRACK ACROSS NORTHERN OHIO FRIDAY EVENING SPREADING SNOW ACROSS THE FORECAST AREA.
638 PM EDT THU APR 7 2016 LOW PRESSURE OVER THE EASTERN LAKES WILL MOVE INTO QUEBEC OVERNIGHT. A LOW PRESSURE SYSTEM WILL TRACK ACROSS NORTHERN OHIO FRIDAY EVENING SPREADING SNOW ACROSS THE FORECAST AREA.
IT WILL BE A LITTLE BIT COOLER FRIDAY. LAPSE RATES START OUT UNIMPRESSIVE AS THE AREA REMAINS UNDER THE INFLUENCE OF THE THE STUBBORN SHORTWV RIDGE WEDGED BETWEEN THE DEEP TROUGH ACROSS THE NE U. AND THE UPPER LOW OFF THE CA COAST.
WV IMAGERY INDICATES THE LOW IS CURRENTLY CENTERED OVER FAR NORTHERN LAKE MI NEAR MANISTIQUE. PRECIP HAS CHANGED OVER TO FREEZING DRIZZLE/RAIN FOR MANY LOCATIONS IN THE LOWER TERRAIN ALONG LAKE SUPERIOR. CONTINUED SMALL CHANCES OF DZ/FZDZ THROUGH THE AFTERNOON ACROSS THE HIGHER TERRAIN OF THE NORTH- CENTRAL. HAVE THE HIGHEST POPS ON FRIDAY WITH THE ALBERTA CLIPPER SYSTEM MOVING THROUGH AND KEPT THE HIGHEST POPS AND QPF IN NORTH TO NORTHEAST WIND LAKE EFFECT SNOWBELTS ALONG LAKE SUPERIOR. GFS AND ECMWF SHOW A 500 MB TROUGH OVER THE NORTHERN PLAINS 12Z SUN. THIS TROUGH MOVES INTO THE UPPER GREAT LAKES SUN NIGHT INTO MON AND LINGERS INTO MON NIGHT AS COLDER AIR ALOFT AT 850 MB MOVES IN.
Upper low approaching from the southwest is bringing increased high level moisture with plenty of cirrus clouds. Second upper low will approach California from the Pacific Friday afternoon.
WHAT REMAINED OF THE COLD FRONT HAS DISSIPATED AS SOUTHEAST WINDS RETURN TO THE VALLEY. WITHOUT THE FOCUSING MECHANISM OF THE COLD FRONT. THE H5 TROUGH TO THE WEST WILL BE BEGINNING TO MOVE EAST.
Weak cold air advection occurs in the lower levels early this morning as the northern wave continues southeast, but stronger cooling aloft leads to very steep lapse rates with good insolation as weak subsidence occurs aloft.
142 PM EDT THU APR 7 2016 A SLOW MOVING COLD FRONT, WILL BRING RAIN TO THE REGION TODAY.
A SERIES OF LOW PRESSURE SYSTEMS APPROACHING FROM THE SOUTHWEST AND WEST WILL BRING A CHANCE OF SHOWERS AND COOLER TEMPERATURES LATER TODAY INTO FRIDAY.
WITH TROF TO THE EAST AND RIDGE TO THE WEST. WESTERN UPPER RIDGE SHIFTS EASTWARD OVER THE NORTHERN ROCKIES ON FRIDAY. AND WARMER AIR WILL BEGIN ADVECTING INTO THE REGION FROM THE SOUTHWEST.
THE COLD FRONT THAT MOVED THROUGH THE REGION OVER THE PAST 24 HRS HAS MOVED WELL SOUTH OF THE AREA THIS AFTERNOON, AND A VERY DRY AIR MASS IS CURRENTLY IN PLACE.
08Z SURFACE ANALYSIS PLACES A COLD FRONT FROM SOUTHEAST LOWER MICHIGAN BACK THROUGH WEST CENTRAL ILLINOIS AND ALONG THE I-70 CORRIDOR FROM ST LOUIS TO KANSAS CITY MISSOURI. THE AFOREMENTIONED COLD FRONT OVER MID MISSOURI WILL DROP SOUTH TODAY INTO THE MID SOUTH AND LOWER MISSISSIPPI VALLEY. HIGH TEMPERATURES TODAY AHEAD OF THE COLD FRONT WILL RANGE FROM THE LOWER 60S ACROSS NORTHWEST TENNESSEE NEAR THE TENNESSEE RIVER AND UPPER 60S TO LOWER TO PERHAPS MIDDLE 70S ELSEWHERE. A REINFORCING COLD FRONT WILL MOVE THROUGH THE REGION FRIDAY NIGHT. LOWS FRIDAY NIGHT ARE EXPECTED TO DROP INTO THE LOWER TO MIDDLE 30S NEAR THE TENNESSEE RIVER AND NORTH OF I-40 AND UPPER 30S TO AROUND 30 DEGREES NEAR THE TENNESSEE RIVER.
327 PM EDT THU APR 7 2016 LOW PRESSURE CROSSING SOUTHERN CANADA WILL DRIVE A COLD FRONT THROUGH THE REGION TONIGHT.
421 PM CDT THU JUN 25 2015 SHOWERS AND THUNDERSTORMS CONTINUED TO DRIFT NORTH ACROSS PARTS OF THE FOUR STATE REGION ON THE SOUTHERN PERIPHERY OF AN UPPER LEVEL RIDGE OF HIGH PRESSURE OVER AREA ASSOCIATED WITH AN INVERTED UPPER TROUGH/EASTERLY WAVE ACROSS THE GULF COAST STATES AND HOT AFTERNOON TEMPERATURES.
1207 PM CDT THU JUN 25 2015 FOR 18Z TAFS /ISSUED 1111 AM CDT THU JUN 25 2015/ QUASI ZONAL FLOW ACROSS THE NORTHERN TIER OF THE US WILL BEGIN TO AMPLIFY AND FURTHER WEAKEN THE RIDGE THAT IS CURRENTLY ANCHORED OVER THE SOUTHERN MS VALLEY. THE RIDGE WILL HOLD ACROSS THE TN VALLEY FOR ANOTHER DAY KEEPING TEMPS HOT AND PRECIP CHANCES LOW. DEWPOINTS WILL NOT MIX OUT MUCH TODAY AND THEY STARTED OUT STRONG THIS MORNING IN THE LOWER 70S. LIGHT WINDS TODAY WILL NOT HELP MIX OUT NOR HELP IT FEEL ANY COOLER.
WEAK SURFACE PRESSURE RIDGING WILL SLIDE BOTH EAST AND SOUTH OF ECFL DURING THIS TIME AS A WEAK FRONTAL BOUNDARY APPROACHES THE DEEP SOUTH. TROUGHING IN THE MID-LEVELS ACROSS THE EASTERN CONUS WILL ALLOW FOR A MORE SOUTHWESTERLY FLOW IN BOTH THE LOW/MID LEVELS OF THE ATMOSPHERE. MAX TEMPS GENERALLY IN THE LOWER 90S EVEN AT THE BEACHES DUE TO THE DELAYED SEA BREEZE. SFC AND MID LEVEL RIDGE WILL GRADUALLY REBUILD OVER THE FL PENINSULA WHICH WILL RESULT IN SLIGHT MEAN DRYING AND A REDUCTION IN THE OFFSHORE FLOW. TEMPS SHOULD REMAIN SLIGHTLY ABOVE NORMAL FOR LATE JUNE IN THE LOW TO MID 90S. WEAK HIGH PRESSURE RIDGING OVER THE SOUTH-CENTRAL FLORIDA PENINSULA. THE ATLANTIC RIDGE AXIS FOCUSES SOUTH AND EAST OF THE AREA AS A COOL FRONTAL BOUNDARY APPROACHES THE DEEP SOUTH.
ALOFT: SIGNIFICANT AMPLIFICATION WILL OCCUR OVER THE NEXT 36 HRS AND BY 00Z/SAT AN ANOMALOUS 595+ SUBTROPICAL HIGH WILL BE OVER THE WRN USA WITH A TROF OVER THE E /BOTH FEATURES WILL EVENTUALLY EVOLVE TO 2 STANDARD DEVIATIONS ABOVE AND BELOW NORMAL/. CURRENT INDICATIONS ARE THAT THIS TROF WILL EMERGE ONTO THE NRN PLAINS WED. THIS HIGH WILL DRIFT SE ACROSS THE FCST AREA SAT. FAIRLY POTENT LOW PRES WILL EMERGE INTO THE NRN PLAINS WED AND WILL PROBABLY FORCE A SFC TROF TO CROSS THE FCST AREA IN THE WARM SECTOR. THE THERMAL RIDGE WILL MOVE THRU COINCIDENT WITH THE FRONT. SO EXPECT HIGHS TO BE A FEW DEGS WARMER.
WINDS MAY GRADUALLY BACK TO THE SOUTHEAST AS A TROUGH OF LOW PRESSURE DEVELOPS ACROSS COLORADO. A COLD FRONT IS STILL ON TRACK TO SAG SOUTHWARD FROM THE CENTRAL PLAINS. /ISSUED 243 AM CDT THU JUN 25 2015/ THE UPPER LEVEL PATTERN WILL BEGIN TO AMPLIFY TODAY WITH BUILDING HIGH PRESSURE ACROSS THE WESTERN CONUS AND A DEEPENING TROUGH ACROSS THE NORTHERN AND CENTRAL PLAINS. AN ISOLATED SHOWER IS NOT OUT OF THE QUESTION ACROSS THE SOUTHEAST ZONES THIS AFTERNOON DUE TO A VERY WEAK UPPER TROUGH IN THE GULF. THE NORTHWEST ZONES MAY REACH THE UPPER 90S BY AFTERNOON DUE TO SOUTHWEST WINDS AHEAD OF AN APPROACHING COLD FRONT.
THE HIGHEST AREA OF COVERAGE WILL BE THE EASTERN BIG BEND AND SOUTH-CENTRAL GEORGIA. HIGHS TODAY ARE ON TRACK TO PEAK IN THE LOW TO MID 90S WITH LOWS DIPPING INTO THE MID 70S OVERNIGHT.
A STRONGER WAVE DIPS SOUTH INTO THE LOWER OH VALLEY CROSSING OVER THE RIDGE OUT WEST AND MAKES FOR AN INTERESTING SITUATION FOR KY ON FRIDAY EVENING AND FRIDAY NIGHT. THE WARM FRONT WITH A STRONG SOUTHERLY SURGE PUSHES NORTH THROUGH THE AREA. WE FIND OURSELVES UNDER THE INFLUENCE OF A HIGH AMPLITUDE PATTERN WITH A MEAN EAST CONUS TROUGH AND WEST CONUS RIDGE.
DEWPOINT TEMPS RUNNING IN THE LOW TO MIDDLE 70S WITH HEAT INDICIES RANGING FROM 100 TO 105. MID STATE IN WARM SECTOR FRIDAY EVENING AND OVENIGHT AS LOW CENTER TRACKS ALONG THE OHIO RIVER WITH COLD FRONT IN EASTERN ARKANSAS AT 00Z FRIDAY EVENING.
A COLD FRONT WILL ARRIVE IN NW OK TOMORROW MORNING. /ISSUED 1024 AM CDT THU JUN 25 2015/ A RIDGE ALOFT WILL MAINTAIN THE GENERALLY CLEAR. MID LEVEL CLOUDS WILL BEGIN TO INCREASE ACROSS N/NW OK AS A COLD FRONT APPROACHES FROM THE NORTH FRIDAY MORNING. THE WRN RIDGE IS EXPECTED TO CONTINUE TO BUILD THROUGH THE DAY. WITH A SHORT WAVE TROUGH DEVELOPING UPSTREAM OVER THE NRN HIGH PLAINS. WITH COOLER CONDITIONS DEVELOPING BEHIND THE FRONT. WITH THE SRN PLAINS REMAINING BOOKENDED BETWEEN AN WRN RIDGE AND ERN TROUGH.
325 PM EDT THU JUN 25 2015 CONVECTIVE COVERAGE AND INTENSITY IS MUCH LOWER TODAY THAN YESTERDAY WHICH MATCHES WELL WITH THE HIGH-RES MODEL REFLECTIVITY PRODUCTS. PROBABLY ASSOCIATED TO SOME EXTENT WITH LATENT HEAT TRANSFER FROM YESTERDAYS EXTENSIVE DEEP CONVECTION AND A SLIGHT EASTWARD SURGE IN THE WEAK UPPER RIDGE. MORE WIDESPREAD CONVECTIVE DEVELOPMENT EXPECTED TOMORROW AS THE UPPER FLOW BEGINS TURNING SOUTHWESTERLY AHEAD OF THE DIGGING UPPER TROUGH. UPPER FORCING INCREASES FRIDAY NIGHT ACROSS NORTH GEORGIA AS THE UPPER TROUGH DIGS DEEPER INTO THE REGION.
136 PM EDT THU JUN 25 2015 A WEAK AREA OF LOW PRESSURE WILL MOVE FROM THE OHIO VALLEY TODAY TO THE ATLANTIC COAST TONIGHT. BROAD TROF OVER THE NEUS AND GREAT LAKES CONTS. PERHAPS DUE TO THE TERRAIN BUT THERE IS ALSO A WEAK SFC TROF IN THAT AREA. SERIES OF WVS CONT TO MARCH EWRD THRU THE DEEPENING NEUS TROF. UPR TROF AND WEAK SFC BOUNDRIES CONTS A CHANCE OF SHWER SINTO FRI.
245 PM PDT THU JUN 25 2015 A RIDGE OF HIGH PRESSURE PARKED OVER THE FOUR CORNERS REGION WILL BRING DRY WEATHER AND ABOVE NORMAL TEMPERATURES TO THE CENTRAL CA INTERIOR THROUGH FRIDAY.
AN INCREASING CHANCE OF THUNDERSTORMS IS EXPECTED FOR THE HIGHER TERRAIN OVER THE WEEKEND.
THE DELTA BREEZE WILL INCREASE DURING THE DAY FRIDAY KEEPING THE CENTRAL SACRAMENTO AND SAN JOAQUIN VALLEYS SLIGHTLY COOLER. UPPER LEVEL MONSOON MOISTURE WILL BE ROTATING AROUND THE RIDGE BRINGING SOME HIGH LEVEL CLOUDS AND THE POTENTIAL FOR MOUNTAIN THUNDERSTORMS. THE LOWER LEVELS OF THE ATMOSPHERE ARE VERY DRY SO ANY STORMS THAT DO DEVELOP ARE NOT EXPECTED TO PRODUCE MUCH RAINFALL BUT LIGHTNING AND WINDS SHOULD BE EXPECTED.
337 PM CDT THU JUN 25 2015 SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON HAVE DEVELOPED IN THE HIGHER ELEVATIONS OF THE NORTHEAST AND NEAR THE DRY AIR INTERFACE ALOFT NEAR I-20.
BUT COOLER WEATHER IS ON THE WAY. INCREASING MID AND HIGH CLOUDS AND SLIGHTLY COOLER TEMPERATURES ARE EXPECTED OVER THE WEEKEND. HIGH PRESSURE EXTENDING WESTWARD FROM THE GREAT BASIN HAS LED TO A NICE WARM UP FOR THE BAY AREA TODAY. THE COOLER TEMPS ALONG THE COAST ARE DUE TO A WEAK SEMI-SOUTHERLY SURGE AS SEEN ON THE VISIBLE SATELLITE. DO EXPECT THE THERMAL BELTS TO BE ACTIVE WITH TEMPS IN THE 60S AND 70S ACROSS THE HIGHER TERRAIN TONIGHT. HIGH PRESSURE WEAKENS AS A WEAK UPPER LEVEL LOW TRACKS ON THE WESTERN EDGE OF THE RIDGE (ALONG THE COAST).
252 PM CDT THU JUN 25 2015 19Z/2PM SURFACE ANALYSIS SHOWS A NEARLY STATIONARY WARM FRONT EXTENDING ACROSS IL FROM RUSHVILLE EAST TO DECATUR AND SOUTHEAST TO LAWRENCEVILLE. WEAK LOW PRESSURE MOVING ALONG THE FRONT WAS DEPARTING INTO S INDIANA/KENTUCKY TAKING A WAVE OF SHOWERS WITH IT. TEMPS TONIGHT SHOULD REMAIN ON THE WARM SIDE DUE TO THE PERSISTENT CLOUD COVER AND THE PROXIMITY OF THE WARM FRONT. TEMPS WILL BE QUITE A BIT COOLER. WITH OUR WARMER READINGS SOUTH OF I-70.
403 PM EDT THU JUN 25 2015 WAVES OF LOW PRESSURE ALONG A FRONTAL BOUNDARY AFFECT THE AREA THROUGH FRIDAY.
506 PM EDT THU JUN 25 2015 A WEAK COLD FRONT WILL STALL TO OUR SOUTH BY THIS EVENING. WEAK LOW PRESSURE WILL TRACK EAST ALONG THE FRONT. PASSING SOUTH OF NEW ENGLAND TONIGHT AND FRIDAY AS HIGH PRESSURE BUILDS IN FROM THE WEST.
600 PM EDT THU JUN 25 2015 AN UPPER-LEVEL RIDGE ACROSS THE SOUTHERN STATES WILL HOLD HOT TEMPERATURES ACROSS THE FORECAST AREA THROUGH FRIDAY.
WILL PUSH EAST TOWARD THE MID ATLANTIC TONIGHT WHILE A LARGE AREA OF HIGH PRESSURE BEGINS TO SETTLE INTO THE NORTHERN GREAT LAKES. A 500MB TROUGH CURRENTLY DROPPING SOUTHWARD ACROSS THE STATE. 500-300MB QVECTORS SHOW FORCING (ASSOCIATED WITH THE 500MB TROUGH). THE RESULT OF A LARGE AREA OF CANADIAN HIGH PRESSURE SETTLING FURTHER SOUTH INTO MI. WILL MENTION SOME PATCHY FOG OVERNIGHT AS TEMPS FALL THROUGH THE 50S WHILE SFC DEW PTS SLOWLY DROP INTO THE LOWER 50S. ZONAL FLOW BECOMING MORE AMPLIFIED OVER THE NEXT SEVERAL DAYS AS QUASI-PERMANENT WESTERN CONUS RIDGE BUILDS WITH DOWNSTREAM TROUGHING ACROSS THE EASTERN STATES. STILL A HINT OF SOME HIGHER LOW LEVEL MOISTURE/H9-H8 THETA-E RIDGING UP THE US-131 AND I-75 CORRIDORS IN NORTHERN LOWER AND OVER PARTS OF EASTERN UPPER.
WITH A COLD FRONT SET TO MOVE THROUGH DURING THE DAY TOMORROW.
THE RIDGE AXIS CONTINUES TO SIT OVER SOUTH CENTRAL FLORIDA THIS AFTERNOON. THOUGH SOME ADDITIONAL CLOUD COVER COULD KEEP THINGS A DEGREE OR TWO COOLER TOMORROW ACROSS PORTIONS OF THE AREA.
353 PM CDT THU JUN 25 2015 A VERY WEAK UPPER TROUGH LYING ACROSS OUR AREA WILL GRADUALLY MOISTEN AND SUPPORT A CHANCE OF THUNDERSTORMS AS A DISTURBANCE SLIPS SOUTH AND SOUTHEAST FROM SOUTHERN COLORADO THROUGH THE AREA. ANY CONTRIBUTING OUTFLOW IS LIKELY TO BECOME ABSORBED WITHIN RECOVERING SOUTHERLY LOW LEVEL FLOW FRIDAY WHILE A MORE SIGNIFICANT COLD FRONTAL BOUNDARY WILL BE MOVING OUT OF THE PANHANDLE BY EARLY TO MID AFTERNOON. THAT BEING A HUGE RIDGE OF HIGH PRESSURE OVER THE FOUR CORNERS REGION AND A MASSIVE TROUGH ACROSS THE MIDWEST.
AN UPPER LEVEL RIDGE OF HIGH PRESSURE OVER THE FOUR STATE REGION HAS AN UPPER LEVEL INVERTED TROUGH EXTENDING FROM THE CENTRAL GULF COAST INTO THE REGION AND WITH THIS FEATURE AND AFTERNOON HEATING EXPECTING SHOWERS AND THUNDERSTORMS TO DEVELOP AND MOVE NORTH. /ISSUED 409 AM CDT THU JUN 25 2015/ WEATHER TODAY WILL BEGIN WITH AN UPPER LEVEL RIDGE CENTERED OVER THE FOUR STATE REGION AND HIGH PRESSURE AT THE SURFACE. AS A RIDGE BUILDS OVER THE WESTERN U. DRIVING A TROUGH SOUTH INTO THE REGION ON FRIDAY. THIS WILL BRING A COLD FRONT SOUTH TO THE RED RIVER LATE FRIDAY.
/ISSUED 337 AM EDT THU JUN 25 2015/ TRANSITION PERIOD BEGINS TODAY AS DEEP LAYER HIGH PRESSURE BEGINS TO WEAKEN AND SLOWLY SINK SOUTHWARD. THE RIDGE AXIS WILL REMAIN ACROSS CENTRAL FLORIDA TODAY. DRY AIR AND SUBSIDENCE DUE TO HIGH PRESSURE REMAIN AT AND ABOVE 850MB. AN UPPER LEVEL TROUGH ACROSS THE SOUTHERN BAHAMAS WILL LIFT NORTHWARD AND SHEAR OUT BY THE WEEKEND EAST OF THE NORTHERN BAHAMAS AHEAD OF THE UPPER TROUGH. UPPER LEVEL TROUGH WILL DIG ACROSS THE UPPER GREAT LAKES. AND THE MID/UPPER RIDGE WILL SINK SOUTHWARD INTO DEEP SOUTH FLORIDA AND THE FLORIDA KEYS.
HIGH PRESSURE WILL STRENGTHEN ACROSS THE REGION THROUGH THE UPCOMING WEEKEND.
A VORT LOBE ASSOCD WITH WEAKENING MID LEVEL TROUGH MAY PUSH ACROSS THE WRN FL PANHANDLE AND INTO THE SUWANNEE VALLEY AREA FRI AFTN/EVENING. MAX TEMPS STILL ADVERTISED IN THE LOWER TO MID 90S. UPPER TROF DIGS SEWD OVER EASTERN STATES FRI NIGHT THRU SAT NIGHT.