Aikyam-Lab/Synoptic-Bench huggingface dataset:
939 AM EST SUN JAN 25 2015 HIGH PRESSURE IS IN PLACE ACROSS THE AREA THIS MORNING WITH THE HIGH CENTER OVER THE CENTRAL GULF OF MEXICO. A LOW PRESSURE SYSTEM IS IN PLACE OVER THE UPPER MS VALLEY REGION AND WILL BE SHIFTING EAST THROUGH THE DAY TODAY. THE COLD FRONT WITH THIS WILL PUSH THROUGH THE AREA OVERNIGHT WITH A FEW SHOWERS POSSIBLE ACROSS THE AREA AS IT MOVES THROUGH.
1055 AM EST SUN JAN 25 2015 LOW PRESSURE WILL BRING WIDESPREAD SNOW LATER TODAY THROUGH MONDAY. SO ANTICIPATE THE LOW CENTER TO CONTINUE SOUTH JUST A LITTLE LONGER BEFORE BEGINNING TO SHIFT EAST. BROAD UPR TROFG IS PROGGED TO BEGIN TO SHIFT E OF THE RGN TUE WITH DCRG SNW SHWR CHCS.
232 AM PST SUN JAN 25 2015 HIGH PRESSURE OVER THE WEST WILL BRING MILD AFTERNOON TEMPERATURES THROUGH MONDAY.
LIGHT WEST WINDS TONIGHT AS SOME HIGH CLOUDS STREAM ACROSS THE TERMINALS, WELL SOUTH OF A COLD FRONT ENTERING NORTH FLORIDA.
Model guidance remain in agreement that high pressure and warm air will move into Idaho and Montana tonight. The ridge over the region will reach a peak on Monday and near record to over record temperatures will be observed. Hamilton has a high chance to be one of the warmer spots in the low 60s for Monday.
UPPER RIDGE AXIS TRANSITIONS ACROSS THE INTERIOR NORTHWEST THROUGH MONDAY. FOR TODAY EXPECT THE WIND TO CONTAIN THE FOG OR LOW CLOUD DEVELOPMENT TO SE OREGON AND THE LOWER TREASURE VALLEY IN SW IDAHO. FOR SUNDAY NIGHT AND MONDAY FOG AND LOW CLOUDS WILL REMAIN ANCHORED ACROSS SE OREGON AND THE LOWER TREASURE VALLEY /KONO- KEUL/. THERE IS A CHANCE LOW CLOUDS COULD FILL IN ACROSS THE REST OF THE LOWER SNAKE RIVER VALLEY. UPPER LEVEL RIDGE WILL CONTINUE TO MOVE EAST AS AN UPPER TROUGH WITH ORIGINS IN THE MEXICAN BAJA MOVES NORTH INTO THE AREA.
GENERALLY DO NOT EXPECT ANY NOTABLE PROBLEMS FROM FREEZING PRECIPITATION ATTM AS MOST LOCATIONS REMAIN CLOSER TO 35F THROUGH THE NIGHT. AND AS THE LOW-LEVEL JET NOSES INTO THE FAR SOUTHEAST CORNER OF THE STATE ADDING INSTABILITY AND MOISTURE. LOW PRESSURE OVER THE CENTRAL PLAINS WILL THEN EJECT NORTHEAST TOWARDS THE GREAT LAKES WEDNESDAY NIGHT AS THE LARGE UPPER TROUGH OVER THE WEST COAST MOVES INTO THE ROCKIES. FEEDING WARMER AIR AND MOISTURE INTO LOWER MICHIGAN.
340 AM MDT TUE APR 7 2015 PARTLY TO MOSTLY CLEAR SKIES WERE PRESENT ACROSS THE TRI STATE AREA IN THE EARLY AFTERNOON AS AN UPPER LEVEL RIDGE WAS SET UP OVER THE CENTRAL CONUS. SATURATED SOUNDINGS AT THE LOWER LEVELS WITH DEPTHS AROUND 3000 FEET SHOW SOME DRIZZLE FORMATION. EXPECTING LOW TEMPERATURES TONIGHT TO BE IN THE LOW TO MID 40S. EXPECTING HIGH TEMPERATURES TO BE IN THE LOWER 60S UNDER AREAS OF PERSISTENT CLOUD COVER TO THE LOWER 70S IN THE SOUTH UNDER MORE CLEAR SKIES.
307 AM EDT TUE APR 7 2015 AN UNSETTLED WEATHER PATTERN WILL BEGIN TONIGHT AS AREAS OF LOW PRESSURE INTERACT WITH A SLOWLY SOUTHWARD DRIFTING FRONTAL BOUNDARY. A LARGE HIGH PRESSURE AREA BUILDING ACROSS QUEBEC TUESDAY WILL BRING SLIGHTLY COOLER TEMPERATURES TO THE AREA BY WEDNESDAY.
333 AM EDT TUE APR 7 2015 A NEARLY STATIONARY FRONT ACROSS SOUTHERN NEW ENGLAND WILL SLIP A BIT FURTHER SOUTH TODAY AND TONIGHT AS HIGH PRESSURE BUILDS BY TO OUR NORTH.
AND STRONG LOW PRESSURE MOVING ONTO THE COAST. BUT SO FAR TEMPS HAVE REMAINED JUST ABOVE FREEZING. CLOSED LOW COMES FULLY ONSHORE TONIGHT.
600 AM CDT Tue Apr 7 2015 Low level jet of 35-45 kts at 850 mb was occurring across the area with a warm front set up across central MO. Another warm day is in store for the area on Wednesday with the warm front shifting northward.
THE SHORT TERM PERIOD LOOKS RATHER SUBDUED AS A MID/UPPER LEVEL RIDGE AXIS REMAINS ACROSS THE EASTERN GULF OF MEXICO. THIS RIDGE WILL AMPLIFY LATE TUESDAY INTO WEDNESDAY IN RESPONSE TO A STRONG TROUGH MOVING ONTO THE NORTHERN CALIFORNIA COAST AND INTO THE CENTRAL ROCKIES.
TODAY AN UPPER LEVEL RIDGE WILL BE IN PLACE OVER THE SOUTHEAST.
AN UPPER RIDGE WILL BUILD IN OVER THE AREA TUESDAY AND WEDNESDAY AND WILL SUPPRESS THE RAIN CHANCES THESE DAYS.
622 AM EDT TUE APR 7 2015 HIGH PRESSURE OVER ONTARIO WILL BUILD INTO QUEBEC THROUGH TONIGHT AND WILL NOSE DOWN INTO MAINE.
611 AM EDT TUE APR 7 2015 A NEARLY STATIONARY FRONT ACROSS SOUTHERN NEW ENGLAND WILL SLIP A BIT FURTHER SOUTH TODAY AND TONIGHT AS HIGH PRESSURE BUILDS BY TO OUR NORTH.
355 AM CDT TUE APR 7 2015 TEMPS ARE SEVERAL DEGREES ABOVE FREEZING AND LIKELY TO STAY SO THROUGH THE REMAINDER OF THE MORNING. EASTERLY FLOW WEAKENS DURING THE DAY AS AN UPPER TROF LIFTS INTO CANADA. AS THE NEXT UPPER TROF MOVES INTO THE INTERMOUNTAIN WEST. HOWEVER AS THE UPPER TROF EJECTS INTO THE NORTHERN PLAINS.
LOCAL FREEZING DRIZZLE POSSIBLE. ANY ICING SHOULD BE LIMITED TO ELEVATED SURFACES (BRIDGES/TREES/POWER LINES). THIS EVENING THROUGH TUESDAY NIGHT UPPER LEVEL ANALYSIS HAS DEEP TROF DEVELOPING ALONG THE WEST COAST WITH WEAK RIDGING ACROSS THE CENTRAL PLAINS. CANADIAN HIGH PRESSURE HAS NOSED INTO THE DAKOTAS. SOUTHWEST UPPER LEVEL FLOW CONTINUES OVER THE AREA WITH WEAK ENERGY EJECTING OUT OF THE WESTERN TROF. LOWS WILL FALL INTO THE LOW TO MID 30S.
323 AM EDT TUE APR 7 2015 HIGH PRESSURE OVER ONTARIO WILL BUILD INTO QUEBEC THROUGH TONIGHT AND WILL NOSE DOWN INTO MAINE.
133 AM EDT TUE APR 7 2015 AN UNSETTLED WEATHER PATTERN WILL BEGIN TONIGHT AS AREAS OF LOW PRESSURE INTERACT WITH A SLOWLY SOUTHWARD DRIFTING FRONTAL BOUNDARY. A LARGE HIGH PRESSURE AREA BUILDING ACROSS QUEBEC TUESDAY WILL BRING SLIGHTLY COOLER TEMPERATURES TO THE AREA BY WEDNESDAY.
1110 PM MDT MON APR 6 2015 UPDATED FOR 06Z AVIATION DISCUSSION VERY DRY AND WINDY SOUTH OF OUR COLD FRONT TODAY. IT IS CONSIDERABLY COOLER. THE LOWEST ELEVATIONS HAVE WARMED ENOUGH FOR A LITTLE RAIN OR RAIN AND SNOW MIXTURE. WE TRANSITION TO THE APPROACHING UPPER LOW WHICH IS CURRENTLY JUST OFF THE OREGON COAST. THE FIRST RIPPLE ON THE SOUTH SIDE OF THIS UPPER LOW IS STILL EXPECTED TO MOVE INTO THE SW BY 12Z WITH SOME WEAK QG FORCING. NEW SHOWERS SHOULD ALSO DEVELOP ALONG POTENTIAL COLD FRONT AS IT LIFTS NWD INTO CENTRAL WYO.
HIGH PRESSURE CENTERED OVER THE OUTER BANKS (NC) WITH THE LOWEST PRESSURES OVER WESTERN KS MAINTAINING PERSISTENT SOUTHERLIES ACROSS EASTERN TEXAS. GULF CENTERED UPPER RIDGING.
302 AM CDT Tue Apr 7 2015 Low level jet of 35-45 kts at 850 mb was occurring across the area with a warm front set up across central MO. Another warm day is in store for the area on Wednesday with the warm front shifting northward.
THE COLD FRONT ASSOCIATED WITH THE PACIFIC LOW PRESSURE SYSTEM TO THE WEST STOPPED SHORT OF THE EASTERN UINTA MOUNTAINS SO REDUCED CHANCES FOR SHOWERS OVER THAT REGION LATE THIS AFTERNOON AND THIS EVENING. COVERAGE INCREASES LATE TUESDAY NIGHT AS THE COLD FRONT APPROACHES FROM THE WEST. THOUGH COOLER AIR WILL BEGIN TO FILTER OVER THE AREA AHEAD OF THE APPROACHING STORM. WEDNESDAY THE LOW OPENS AND FILLS SOMEWHAT AS IT MOVES INTO THE FORECAST AREA. THE COLD FRONT PASSES THROUGH THE DAY WITH SW COLORADO THE LAST TO GET THE COOLER AIR IN THE AFTERNOON.
Cold temperatures this morning will quickly moderate to seasonal levels by this afternoon under a passing ridge of high pressure.
AS MANY OF THE HIGHER RESOLUTION MODELS, AS WELL AS THE GFS, ARE DEPICTING THIS TREND, HAVE PUSHED QPF UP ALONG THE CASCADES, AND CONSEQUENTIALLY, HAVE BUMPED UP SNOW AMOUNTS AS WELL.
GUSTY SOUTHWEST WINDS WILL RESUME TODAY AS A COLD FRONT MOVES TOWARD ARIZONA.
STRONG AND DEEP UPPER LEVEL LOW CONTINUES TO DROP SOUTH OFF THE COAST OF OREGON AND NRN CA THIS MORNING. AS THE UPPER LOW EDGES CLOSER. TEMPS WILL BE NEAR NORMAL TODAY AND ONLY A FEW DEGREES COOLER WED.
MOSTLY TO CLOUDY SKIES WITH PERIODS OF LIGHT RAIN CAN BE EXPECTED THIS MORNING AS A WEAK WARM FRONT LIFTS OUT OF THE GULF OF MEXICO AND PUSHES NORTHWARD ACROSS THE FORECAST AREA. THE WARM FRONT SHOULD BE NORTH OF THE FORECAST AREA BY EARLY AFTERNOON.
SNOW IS EXPECTED TO MIX WITH RAIN ACROSS SOUTHWESTERN NORTH DAKOTA WEDNESDAY MORNING AS A RATHER LARGE AND DEEP LOW PRESSURE CENTER MOVES ACROSS THE CENTRAL PLAINS.
151 AM EDT TUE APR 7 2015 HIGH PRESSURE TO OUR EAST WILL MAINTAIN SUFFICIENT ATMOSPHERIC MOISTURE OVER OUR REGION THROUGH MUCH OF THIS WEEK.
LATEST LOOK AT KMUX SHOWS A BAND OF MODERATE RAIN ENTERING THE SF BAY REGION ASSOCIATED WITH THE HEAVILY ADVERTISED COLD FRONT. BEHIND THE COLD FRONT THE ATMOSPHERE WILL DESTABILIZE WITH LIFTED VALUES EXPECTED TO DROP AS LOW AS MINUS 3 WHILE CAPE VALUES COULD EXCEED 200 J/KG. THE COOLER AIR WILL LEAD TO LOWER SNOW LEVELS WITH ACCUMULATIONS EXPECTED OVER 4000 FEET. ALL TOO FAMILIAR RIDGE OF HIGH PRESSURE WILL BUILD BACK TO OUR AREA STARTING ON WEDNESDAY AS THE SYSTEM DEPARTS TO THE EAST. THIS WILL LEAD TO THE STORM TRACK HEADING BACK WELL TO THE NORTH ALONG WITH WARMER TEMPERATURES.
THE PROXIMITY OF A COLD FRONT MAY REDUCE WINDS WELL BELOW THE SPEEDS NEEDED FOR A RED FLAG WARNING.
DRY AND WARMER WEATHER RETURNS FOR THE LATTER PART OF THE WEEK. PRECIPITABLE WATER VALUES 100-120 PERCENT OF NORMAL ALONG COLD FRONT. MODELS REMAIN IN GOOD AGREEMENT IN PUSHING THE TROUGH ONSHORE EARLY THIS MORNING AND TRACKING IT OVER THE GREAT BASIN AREA BY WEDNESDAY MORNING. CONCERN THERE WILL BE SOME SNOWFALL OR A DUSTING OF SNOW OVER THE KERN COUNTY PASSES BY EARLY WEDNESDAY MORNING WITH A COUPLE OF INCHES OVER THE HIGHER MOUNTAINS. THE MAIN WEATHER THREAT MAY BE HAIL AND GUSTY WINDS WITH MODERATE WIND SHEAR AND LOW FREEZING LEVEL. DRY AND WARMING CONDITIONS ARE THEN IN STORE THROUGH THE END OF THE WEEK UNDER WEAK RIDGING AS THE SYSTEM EXITS AND ANOTHER WEAK UPPER LOW DROPS SOUTHEAST OFFSHORE THE CALIFORNIA COAST.
400 AM PDT TUE APR 7 2015 A LOW PRESSURE SYSTEM WILL MOVE INLAND THROUGH CALIFORNIA THROUGH TONIGHT MAINTAINING STRONGER ONSHORE FLOW WITH GUSTY WEST WINDS IN THE MOUNTAINS AND DESERTS. IT WILL ALSO PUSH A WEAKENING COLD FRONT THROUGH FAR SOUTHERN CALIFORNIA TONIGHT BRINGING A PERIOD OF A FEW HOURS OF LIGHT PRECIPITATION SPREADING SOUTHWARD ACROSS THE AREA FROM THIS EVENING THROUGH LATE TONIGHT.
257 AM CDT TUE APR 7 2015 SUBTLE MID LEVEL WAVE COUPLED WITH I305K ASCENT (750-700MB THETA DERIVED) RESULTING IN CONVECTION ACROSS THE AREA EARLY THIS MORNING AS A WARM FRONT APPROACHES FROM THE SW. OTHERWISE TEMPS AND HUMIDITY UP TODAY WITH THE WARM FRONT NORTH OF THE AREA BY THIS EVENING.
MAINLY SOUTH OF THE LOWER AND MIDDLE KEYS. A SUBTROPICAL RIDGE IS WELL ENTRENCHED ACROSS THE SOUTHEAST UNITED STATES.
THE REGION WILL BE BETWEEN HIGH PRESSURE TO THE NORTHEAST AND LOW PRESSURE TO THE SOUTH TONIGHT AND TUESDAY. THE HIGH THEN PUSHES OFF TOWARD EASTERN CANADA. WHILE THE LOW TO THE SOUTH REMAINS NEARLY STATIONARY BEFORE INTENSIFYING AND BEGINNING TO TRACK NORTHEAST WEDNESDAY NIGHT. TRICKY PART THEN BECOMES THE FACT THAT THERE MAY BE PERIODS WHERE THE TEMPERATURE FALLS BELOW FREEZING WHEN THERE ARE CHANCES OF PRECIPITATION. OVERNIGHT LOWS IN THE UPPER 20S TO LOWER 30S TONIGHT AND TUESDAY WILL GIVE WAY TO WARMER LOWS IN THE MID TO UPPER 30S WEDNESDAY NIGHT.
645 AM EDT TUE APR 7 2015 ATLANTIC HIGH PRESSURE WILL MAINTAIN SUFFICIENT ATMOSPHERIC MOISTURE OVER OUR REGION THROUGH MUCH OF THIS WEEK.
340 AM EDT TUE APR 7 2015 ATLANTIC HIGH PRESSURE WILL MAINTAIN SUFFICIENT ATMOSPHERIC MOISTURE OVER OUR REGION THROUGH MUCH OF THIS WEEK.
354 AM CDT TUE APR 7 2015 UNUSUALLY WARM CONDITIONS EXPECTED TODAY AS UPPER LEVEL RIDGE CENTERED ACROSS THE GULF OF MEXICO EXPANDS NORTHWARD. NORMAL HIGHS FOR THIS TIME OF YEAR ARE IN THE UPPER 70S AND LOOKING AT ABOUT 10 DEGREES WARMER THAN THAT FOR TODAY. THE MISSISSIPPI COAST WILL BE ON THE COOLER SIDE DUE TO SEA BREEZE INFLUENCES. SLIGHT SUPPRESSION OF THE RIDGE ON THE WESTERN SIDE MAY DROP 5H LOCALLY WHICH WILL LIMIT HIGHS BY A DEGREE OR 2 ON WEDNESDAY OVER WESTERN PORTIONS OF THE CWA BUT GENERALLY EXPECTING MID 80S AGAIN.
AN UPPER LEVEL LOW THAT IS CURRENTLY OFF THE COAST OF OREGON WILL MOVE SOUTHEAST INTO THE GREAT BASIN BY WEDNESDAY.
VFR CONDITIONS WILL REMAIN THROUGH THE EVENING AS CEILINGS LOWER AHEAD OF A LOW PRESSURE SYSTEM. RAIN/SNOW WILL BE MOSTLY FOCUSED ON THE HIGHER ELEVATIONS. WITH THE AMOUNT OF LOW LEVEL MOISTURE WITH THIS LOW.
THIS WARMING TREND WILL CONTINUE ALOFT TONIGHT AS AN APPROACHING WESTERN CONUS RIDGE BRINGS A TRANSITION TO ANTICYCLONIC FLOW IN WAKE OF A STOUT UPPER DISTURBANCE PUSHING INTO THE TENNESSEE VALLEY. WEAK SURFACE RIDGING IN THE LOWER ROCKIES WILL PROMOTE NORTHWEST WINDS IN THE 10-15 MPH RANGE MONDAY AS AFOREMENTIONED RIDGING MOVES OVERHEAD. BRINGING EVEN WARMER TEMPERATURES TO BEGIN THE FINAL WEEK OF JANUARY. FULL INSOLATION AND H85 THERMAL RIDGING ACROSS THE HIGH PLAINS WILL RESULT IN 10-20 DEGREE ABOVE NORMAL TEMPERATURES.
THIS EVENING THROUGH MONDAY NIGHT 21Z SURFACE ANALYSIS SHOWS LOW PRESSURE MOVING SOUTHEASTWARD ACROSS THE CANADIAN PRAIRIE PROVINCES WITH A TROUGH EXTENDING SOUTHWARD INTO WESTERN SOUTH DAKOTA. THE UPPER RIDGE TO THE WEST WILL BUILD EASTWARD OVER THE NORTHERN PLAINS THROUGH MONDAY NIGHT. A THERMAL RIDGE WILL DEVELOP AND INTENSIFY AS WESTERLY DOWNSLOPE FLOW DEVELOPS ACROSS THE AREA.
STRONG HIGH PRESSURE WILL BUILD INTO THE WESTERN STATES THROUGH TOMORROW.
THIS ACTIVITY SHOULD GRADUALLY MOVE EAST THROUGH THE AFTERNOON AS A WARM FRONT ENTERS WESTERN NORTH DAKOTA. THERE IS A SLIGHT CHANCE THAT PRECIPITATION WILL DEVELOP ALONG THE WARM FRONTAL BOUNDARY EAST (FROM THE TURTLE MOUNTAIN REGION TO THE JAMES RIVER VALLEY) THIS EVENING. IT SHOULD BEGIN AS A MIX OF FREEZING RAIN. WAA TODAY WITH A FEW MODELS GENERATING LIGHT QPF ALONG THE WARM FRONT SO WILL KEEP A SLIGHT CHANCE FOR LIGHT RAIN AND HIGH SKY COVER AS THE FRONT PUSHES EASTWARD DURING THE AFTERNOON INTO THE EARLY EVENING.
DIURNAL HEATING HAS ALLOWED TEMPERATURES AROUND MOST OF THE MID-STATE TO CLIMB INTO THE LOW TO MIDDLE 50S. THERE IS A SMALL CHANCE OF THE SNOW CHANGING TO FREEZING DRIZZLE OVER THE EASTERN HALF OF THE MID-STATE.
A STRONG HIGH PRESSURE RIDGE OVER THE AREA IS BRINGING VALLEY FOG AND A CONTINUED STRONG INVERSION TO THE AREA. THE LOW LEVEL MOISTURE PROFILE ON THE MEDFORD SOUNDING SHOWS THAT MOISTURE IS SLIGHTLY DEEPER THAN YESTERDAY. THE RIDGE WILL GRADUALLY SHIFT EASTWARD BUT CONTINUED HIGH PRESSURE WILL KEEP VALLEY INVERSIONS IN PLACE WITH STAGNANT AIR.
LATEST OBS AT 16Z SHOW WINDS SHIFTING FROM SW TO NW AT KCLL/KUTS/KLFT INDICATING THE COLD FRONT PUSHING INTO THE FORECAST AREA. COLD FRONT WILL MAINLY BE A WIND SHIFT TODAY ACROSS THE AREA WITH COOLER CONDITIONS TOMORROW. LOW PRESSURE OVER MID MISS RIVER VALLEY WILL MOVE E/SE ASSOCIATED WITH A FAST MOVING CLIPPER SYSTEM ALOFT. FOR SE TX THIS WILL ALLOW FOR HIGH PRESSURE OVER THE AREA AND GENERALLY QUIET CONDITIONS FOR MUCH OF THE WEEK.
THIS DISTURBANCE HAS KEPT CLOUDS OVER EASTERN KANSAS THROUGH THE DAY WHICH HAS KEPT TEMPERATURES COOLER.
OUR CLIMB WINDS ARE WNW 20-60KTS VEERING TO NNW BY NEXT ISSUANCE AS THE DEEP UPPER TROUGH MOVES SE. /ISSUED 1007 AM CST SUN JAN 25 2015/ DRY COLD FRONT CURRENTLY CROSSING CWA. AFTERNOON HIGH TEMPERATURES TODAY TO CLIMB INTO THE LOW TO MID 60S WITH LOWS IN THE MID TO UPPER 30S OVERNIGHT. UPPER-LEVEL RIDGE TO MAINTAIN MAINLY NORTHWEST FLOW ALOFT,,,TRANSITIONING TO ZONAL FLOW BY MIDWEEK.
SOME FREEZING RAIN OR A MIX OF FREEZING RAIN/SNOW IS POSSIBLE. EVEN WITH TEMPS RISING TO NEAR FREEZING LATE WITH INCREASING S/SW WINDS SHIFTING WEST LATE. TEMPS COULD BE EVEN WARMER. A COLD FRONT WILL DROP FROM NORTH TO SOUTH THROUGH THE DAY. WE CAN/T RULE OUT SOME FREEZING DRIZZLE GIVEN THE WARM ENVIRONMENT. A MORE SIGNIFICANT COLD FRONT IS PROGGED BY NEXT SAT.
WHILE NORTHEAST LOW LEVEL FLOW EMANATING FROM THE HIGH TO THE NORTH HAS MOSTLY CLEARED SKIES OUT ACROSS EASTERN UPPER/NORTHERN LOWER MICHIGAN. COLD/STRONG CANADIAN HIGH PRESSURE REMAINS CENTERED NORTH OF MINNESOTA EARLY THIS MORNING. WHILE LOW PRESSURE CHURNS ITS WAY THRU THE UPPER MISSISSIPPI VALLEY. MUCH OF MICHIGAN REMAINS UNDER THE STRENGTHEN RIDGE AXIS ASSOCIATED WITH HIGH PRESSURE TO OUR NW. STRONG HIGH PRESSURE. STRONG COLD HIGH PRESSURE WILL MOVE OVERHEAD TONIGHT.
1030 AM MST Sun Jan 25 2015 AVIATION SECTION UPDATED Upper level ridge with axis now centered over the inland Pacific NW will gradually shift east over the next 24 hrs. Band of strong NW flow aloft will persist over north central and central MT through most of today before shifting east with the ridge axis tonight. Extensive mid-high cloud deck is persisting along and east of I-15 this morning and expect this to remain in this general area through the afternoon until the ridge axis shifts further east allowing winds aloft to develop more of a westerly component.
HIGH PRESSURE IN PLACE ACROSS THE AREA THIS AFTERNOON WILL CONTINUE TO SHIFT SOUTH AS A COLD FRONT APPROACHES THE AREA. AND THEN REMAIN BREEZY THROUGH THE DAY MONDAY AS HIGH PRESSURE BUILDS INTO THE AREA BEHIND THE FRONT AND CONDITIONS CLEAR OUT. TO THE LOWER 50S TO NEAR 60 CENTRAL AND SOUTH FOR TONIGHT. HIGHS MONDAY WILL BE IN THE LOWER 60S TO AROUND 70. THE UPPER-LEVEL PATTERN FEATURES A LARGE RIDGE OUT WEST WITH A DEEP TROUGH COVERING MUCH OF THE EASTERN PART OF THE COUNTRY TO START THE PERIOD.
1045 AM PST SUN JAN 25 2015 More fog and low clouds are expected today as high pressure returns. A ridge of high pressure will then rebound late in the week for drier weather and more fog. Cameras show that the fog doesn't really extend into the town of Wenatchee, just along the higher benches surrounding them.
THIS PROLONGED STRETCH OF ABOVE NORMAL WARMTH THAT BEGAN JAN 14TH CONTS AND WILL PEAK TOMORROW AND POSSIBLY TUE WITH THE ALOFT: A HIGHLY AMPLIFIED WRN USA RIDGE / ERN USA TROF WILL REMAIN IN PLACE THRU TOMORROW WITH SOME SLIGHT EASTWARD PROGRESSION. DUE TO AN UPSTREAM TROF OVER THE E PAC. THE NEXT CLIPPER WAS ALREADY DIVING SE ACROSS THE CANADIAN PRAIRIES WITH WARM FRONTOGENESIS UNDERWAY. LOWS PROBABLY OCCUR PRIOR TO MIDNIGHT AS WINDS BECOME LIGHT/CALM AS THE LOW-LVL RIDGE AXIS PASSES.
WATER VAPOR SHOWED UPPER RIDGE OVER WESTERN NORTH AMERICA. EVOLUTION OF THIS UPPER RIDGE WILL DRIVE SHORT TERM WEATHER. UPPER RIDGE WILL BUILD INTO THE NORTHERN PLAINS THROUGH MONDAY NIGHT. THERMAL RIDGE WILL DEVELOP AND INTENSIFY AS DOWNSLOPE FLOW ENHANCES DEVELOPING LEE TROUGH FROM CENTRAL MT INTO CENTRAL NE.
At the same time, surface ridging will start to nose into the area from the Southern Plains late tonight, with winds decreasing considerably as a result. Temperatures Monday should warm into the 50s in most spots as sun returns, with readings ranging from the low 50s across the eastern Ozarks to nearly 60 across southeastern Kansas.
WRAP AROUND LOW CLOUDS QUICKLY SPREADING ACROSS NE OK/NW AR ON BACKSIDE OF STRONG UPPER LOW CURRENTLY PASSING JUST NORTHEAST OF THE AREA.
1153 AM EST SUN JAN 25 2015 A COLD FRONT WAS MOVING INTO CENTRAL OHIO FROM THE NORTH.
A LARGE RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE REGION. AN INVERSION HAS BEGUN TO DEVELOP IN THE LOWER COLUMBIA BASIN IN WHICH LOW CLOUDS AND FOG HAVE DEVELOPED. AREAS WHERE THIS IS OCCURRING WILL NOT SEE THE VERY WARM TEMPERATURES DUE TO THE COOLER AIR BEING TRAPPED BENEATH THE INVERSION AND LACK OF SUNSHINE TO WARM TEMPERATURES UP.
1007 AM CST SUN JAN 25 2015 DRY COLD FRONT CURRENTLY CROSSING CWA. SFC WINDS WILL INCREASE TO BETWEEN 12 AND 15 KTS WITH GUSTS BETWEEN 20 AND 25 KTS BY MID TO LATE MORNING AS A COLD FRONT MOVES ACROSS THE AREA. AFTERNOON HIGH TEMPERATURES TODAY TO CLIMB INTO THE LOW TO MID 60S WITH LOWS IN THE MID TO UPPER 30S OVERNIGHT. UPPER-LEVEL RIDGE TO MAINTAIN MAINLY NORTHWEST FLOW ALOFT,,,TRANSITIONING TO ZONAL FLOW BY MIDWEEK.
1231 PM EST SUN JAN 25 2015 A COLD FRONT WAS MOVING INTO CENTRAL OHIO FROM THE NORTH.
156 PM EST SUN JAN 25 2015 THE NEXT FAST MOVING LOW PRESSURE SYSTEM WILL CROSS THE REGION TONIGHT AND MONDAY WITH A SLIGHT CHANCE OF SHOWERS.
1245 PM EST SUN JAN 25 2015 LOW PRESSURE WILL BRING WIDESPREAD SNOW LATER TODAY THROUGH MONDAY. SO ANTICIPATE THE LOW CENTER TO CONTINUE SOUTH JUST A LITTLE LONGER BEFORE BEGINNING TO SHIFT EAST. BROAD UPR TROFG IS PROGGED TO BEGIN TO SHIFT E OF THE RGN TUE WITH DCRG SNW SHWR CHCS.
325 PM EST SUN JAN 25 2015 LOW PRESSURE WILL BRING WIDESPREAD SNOW LATER TODAY THROUGH MONDAY. LATEST WV IMAGERY SHOWS MID LEVEL LOW CENTER JUST OVER WESTERN KY NOW SHIFTING EAST AS THE ASSOCIATED JET MAX SITS RIGHT OVER OR EAST OF THE TROUGH AXIS. TEMPERATURES IN THE LOWER LEVELS ARE SLIGHTLY WARMER SOUTH OF INTERSTATE 70 AND CONSEQUENTLY THE CHANGEOVER TO SNOW MAY NOT BE UNTIL WELL AFTER MIDNIGHT. SNOW WILL CONTINUE THROUGH MUCH OF MONDAY AS MOISTURE WRAPS AROUND THE LOW AND ASSOCIATED INVERTED TROUGH SHIFTS NORTHEAST OVER THE REGION.
WHICH MAY INCREASE TEMPS TO NEAR FREEZING. A MORE SIGNIFICANT CHANGE IS THE POTENTIAL FOR SPRINKLES/LIGHT FREEZING RAIN IN THE WARM ADVECTION REGIME AHEAD OF A WEAK WAVE TONIGHT.
A POTENT MID TO UPPER LEVEL LOW IS DIVING THROUGH THE UPPER MISSISSIPPI RIVER VALLEY. SCOURING-OUT A BROAD SURFACE CYCLONE. A WEAK AND FRACTURED RIDGE AXIS LIES ACROSS THE GULF OF MEXICO AND THE FLORIDA KEYS.
The associated cold front will push from northwest to southeast across the Tri-state area overnight.
330 PM CST SUN JAN 25 2015 A CLIPPER AND ASSOCIATED WARM FRONT WILL MOVE ACROSS THE REGION TONIGHT INTO TOMORROW CAUSING A QUICK LIGHT TO MODERATE SNOWFALL EVENT ACROSS THE REGION. TEMPERATURES WILL WARM THROUGH THE NIGHT AS THE WARM FRONT MOVES FROM WEST TO EAST. TEMPS WARMED UP INTO THE LOW TO MID 20S AS EXPECTED. WITH THE BEST CHANCE FOR THE HIGHEST SNOW TOTALS IN CENTRAL AND NORTHERN SAINT LOUIS COUNTY EAST INTO THE ARROWHEAD REGION. TEMPERATURES WILL WARM THROUGH THE NIGHT INTO THE LOW TO UPPER 20S BY MONDAY MORNING. EXCEPT FOR IN THE TIP OF THE ARROWHEAD AND IN EAST OF HIGHWAY 63 IN NORTHWEST WISCONSIN WHERE TEMPS ONLY WARM UP TO NEAR FREEZING.
A REINFORCING COLD FRONT WILL MOVE ACROSS THE FORECAST AREA THIS AFTERNOON. THE COOL FRONT IS EXPECTED TO CROSS THE AREA WITH LITTLE FANFARE OTHER THAN A WIND SHIFT AND SLIGHTLY DRIER/COOLER AIR LATER THIS AFTERNOON AND EVENING. WITH YET ANOTHER CDFNT FCST TO BRING COOLER TEMPERATURES THU NIGHT INTO THE WEEKEND. GENERALLY WITH REGARD TO ENERGY DROPPING OUT OF CANADA AS THERE IS GOOD CONSENSUS ON THE MEAN PATTERN OF A CUT OFF LOW DEVELOPING WEST OF THE BAJA WITH DOWNSTREAM RIDGING OVER TX AND A MEAN ERN CONUS TROF. 13 A LOW PRESSURE SYSTEM MOVING THROUGH THE MID MISSISSIPPI RIVER VALLEY WILL RESULT IN INCREASING WEST WINDS ACROSS THE COASTAL WATERS TODAY. THIS LOW WILL DRAG A COLD FRONT THROUGH THE COASTAL WATERS THIS EVENING.
334 PM CST SUN JAN 25 2015 AN AREA OF LOW PRESSURE MOVING TO OUR NORTH WILL DRAG A FRONT ACROSS THE AREA OVERNIGHT INTO EARLY MONDAY. STAYED ON THE WARMER SIDE OF GUIDANCE. NOT OUT OF THE QUESTION WE EVEN END UP A DEGREE OR TWO WARMER THAN THE CURRENT FORECAST. DID HOWEVER LOWER THE FAVORED COOLER LOCATIONS ABOUT A CATEGORY AND BELOW GUIDANCE READINGS DUE TO THE LIGHT FLOW.
REX TYPE BLOCKING PATTERN WAS SITUATED OVER THE WRN CONUS. MODELS AGREE BLOCKING PATTERN WILL NOT LAST VERY LONG AND WILL BE REPLACED WITH FAST ZONAL FLOW.
241 PM EST SUN JAN 25 2015 FAST MOVING LOW PRESSURE SYSTEM WILL CROSS THE REGION TONIGHT AND MONDAY BRINGING A CHANCE FOR SHOWERS.
THE LOW CLOUDINESS THAT DEVELOPED IN RESPONSE TO THE LOW PRESSURE SYSTEM WILL ALSO DIMINISH FROM WEST TO EAST DURING THE EVENING AS IT PULLS AWAY FROM THE REGION.
1251 PM CST SUN JAN 25 2015 LOW CLOUDS ARE BEGINNING TO ERODE OVER WESTERN NORTH DAKOTA AS A WARM FRONT IS APPROACHING FROM MONTANA. THIS ACTIVITY SHOULD GRADUALLY MOVE EAST THROUGH THE AFTERNOON AS A WARM FRONT ENTERS WESTERN NORTH DAKOTA. THERE IS A SLIGHT CHANCE THAT PRECIPITATION WILL DEVELOP ALONG THE WARM FRONTAL BOUNDARY EAST (FROM THE TURTLE MOUNTAIN REGION TO THE JAMES RIVER VALLEY) THIS EVENING. IT SHOULD BEGIN AS A MIX OF FREEZING RAIN. WAA TODAY WITH A FEW MODELS GENERATING LIGHT QPF ALONG THE WARM FRONT SO WILL KEEP A SLIGHT CHANCE FOR LIGHT RAIN AND HIGH SKY COVER AS THE FRONT PUSHES EASTWARD DURING THE AFTERNOON INTO THE EARLY EVENING.
STAGNANT HIGH PRESSURE PATTERN TO BRING WARMER TEMPS, AIR QUALITY ISSUES, PERSISTENT FOG. A massive ridge of high pressure is locked over the western United States, and doesn't look like it will shift enough to allow for much change to the ongoing forecast for the next several days.