An unseasonably deep area of low pressure over the upper Great Lakes swept a powerful cold front across the Niagara Frontier and western Finger Lakes Region. The thunderstorms which accompanied the cold front produced strong, damaging winds.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BUF wrote it up.
An unseasonably deep area of low pressure over the upper Great Lakes swept a powerful cold front across the Niagara Frontier and western Finger Lakes Region. The thunderstorms which accompanied the cold front produced strong, damaging winds. Gusts were measured to 61 mph. The winds downed trees and power lines throughout the region with utilities reporting tens of thousands of customers without service.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Buffalo, NY wrote its last area forecast discussion before the first event at Sep 28, 6:30 AM EST, 3 hours 34 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BUFFALO NY
730 AM EDT MON SEP 28 2009
.SYNOPSIS...
AN UNSEASONABLY DEEP AREA OF LOW PRESSURE OVER THE UPPER GREAT LAKES
WILL SWING A POWERFUL COLD FRONT ACROSS THE REGION TODAY...WITH MOST
SITES PICKING SOME SHOWERS AND POSSIBLY A GUSTY THUNDERSTORM. IT
WILL THEN BECOME QUITE WINDY IN THE WAKE OF THE FRONT WITH WINDS
GUSTING OVER 45 MPH ACROSS MANY OF THE WESTERN COUNTIES. CONDITIONS
WILL REMAIN QUITE UNSETTLED TONIGHT INTO WEDNESDAY AS THE REGION
WILL EXPERIENCE WIDESPREAD LAKE EFFECT RAIN SHOWERS.
&&
.NEAR TERM /THROUGH TONIGHT/...
A RAPIDLY DEEPENING UPPER LOW OVER THE GREAT LAKES WILL DEEPEN THE
SURFACE LOW. A STRONG COLD FRONT OVER THE SOUTHERN LAKES TO THE OHIO
VALLEY WILL SWEEP ACROSS THE FORECAST AREA DURING THE FIRST HALF OF
THE DAY WITH STRONG WINDS AND ELEVATED CONVECTION. WATER VAPOR
IMAGERY SHOWS THE DEEPENING LOW CLEARLY...AND AN ANALYSIS OF
POTENTIAL VORTICITY SHOWS A DEEP INTRUSION ALONG THE
FRONT...SUPPORTING THE FORECAST OF STRONG GUSTY WINDS. UPSTREAM
OBSERVATIONS OVER THE THE NORTHERN PLAINS AND UPPER MIDWEST ON
SUNDAY SHOWED WIDESPREAD WIND GUSTS OF 45 MPH TO NEAR 60 MPH...AND
THIS WAS AS THE SYSTEM WAS STILL IN AN INTENSIFYING STAGE.
A LINE OF CONVECTION OVER WESTERN OHIO TO SOUTHEASTERN MICHIGAN AT
3AM WILL ACCOMPANY THE FRONT AS IT REACHES WESTERN NY DURING THE
EARLY MORNING. THE CONVECTION IS SUPPORTED BY A 50 KNOT LOW LEVEL
JET...AROUND 3000 FEET...AND ANY STORM CELL WILL BE CAPABLE OF
TAPPING INTO THIS JET TO PRODUCE POTENTIALLY DAMAGING WIND. SOME
HAIL HAD ALSO BEEN REPORTED OVER WESTERN OHIO DURING THE OVERNIGHT
HOURS WITH THIS LINE OF CONVECTION...AND BEARS WATCHING AS THE
CONVECTIVE LINE MOVES THROUGH.
ANOTHER CONCERN WILL BE THE LAKE ERIE LEVEL RISE WITH THE WIND SHIFT
AND INCREASED SPEEDS. SOME UNCERTAINTY AT THIS TIME IF WE WILL GET A
BIG ENOUGH SURGE TO BRING THE EASTERN END OF THE LAKE TO FLOOD
STAGE. WE WILL ISSUE A LAKE SHORE FLOOD WATCH STARTING AT 12Z FOR
THE ERIE COUNTY SHORE LINE. THE LAKE LEVEL MAY RISE 4 TO 5 FEET BY
EARLY AFTERNOON AS THE HIGH WINDS PUSH WATER TO THE NORTHEAST CORNER
OF THE LAKE.
YET ANOTHER CONCERN WILL BE BANDS OF LAKE EFFECT RAIN OVER THE
NIAGARA FRONTIER MONDAY AFTERNOON AS SOUTHWEST WINDS ALIGN AND COLD
AIR DEEPENS. LAKE INDUCED CAPES ARE FORECAST TO GO OVER 1000 J/KG.
THE LONG FETCH ALONG LAKE ERIE WILL ALSO PROVIDE ABUNDANT MOISTURE
FROM THE LAKE...AND THE 00Z WRF INDICATES THE POSSIBILITY OF MORE
THAN 3 INCHES OF RAIN IN THE LAKE INDUCED SHOWERS. WILL HAVE TO
REMAIN VIGILANT OF LOCAL FLOOD POTENTIAL FROM THESE LAKE SHOWERS.
THE BULK OF THE SYNOPTIC PRECIP WILL MOVE EAST OF THE FORECAST AREA
WITH THE FRONT BY LATE AFTERNOON...BUT THE SURFACE AND UPPER LOW
WILL CROSS WESTERN NY LATER TONIGHT. A STRONG ISALLOBARIC GRADIENT
WILL BE ASSOCIATED WITH THE SURFACE LOW LATE TONIGHT AND MAY
REJUVENATE A PERIOD OF GUSTY WINDS AS THE LOW ENTERS THE NIAGARA
FRONTIER BETWEEN 09Z AND 12Z. THE INSTABILITY ASSOCIATED WITH THE
UPPER LOW WILL ALSO HELP MAINTAIN THE LAKE EFFECT SHOWERS AND
APPEARS THAT THE LAKE BAND WILL MOVE BACK INTO THE BUF/IAG AREA LATE
TONIGHT.
TEMPERATURES WILL FALL SOMEWHAT AS THE FRONT MOVES THROUGH..BUT NOT
ALL THAT SHARPLY. EARLY DAY HIGHS IN THE MID TO UPPER 60S WILL FALL
DURING THE AFTERNOON TO THE UPPER 50S...THEN TO THE UPPER 40S TO LOW
50S OVERNIGHT.
&&
.SHORT TERM /TUESDAY THROUGH THURSDAY/...
A HIGHLY AMPLIFIED UPPER LEVEL PATTERN WILL BE FOUND ACROSS THE
COUNTRY DURING THIS PERIOD...AS A DEEP TROUGH OVER THE GREAT LAKES
AND NORTHEAST WILL PRODUCE VERY UNSETTLED CONDITIONS ACROSS OUR
REGION. THIS PATTERN WILL FEATURE AN ANOMALOUSLY DEEP SFC LOW...
WHICH THE GEFS AND SREF PACKAGES SUGGEST AS BEING SOME 4 STD BELOW
NORMAL LATE SEPTEMBER LEVELS.
THE MAIN SFC LOW...AS DEFINED BY THE NAM/WRF AND GFS...WILL BE
CENTERED IN THE VCNTY OF YYZ AT 12Z TUES WITH A CENTRAL PRES NEAR
990MB. THE LOW WILL LIFT TO WESTERN QUEBEC BY TUESDAY EVENING...
WHILE SLOWLY FILLING TO ABOUT 995MB. THIS WEAKENING IS IN PART DUE
TO THE SYSTEM OCCLUDING WITH THE LOW BECOMING STACKED FROM THE SFC
TO THE TROP. WITHIN THE DEEP MOIST CYCLONIC FLOW AROUND THIS
FEATURE...H85 TEMPS OF +4C OVER LAKES ERIE AND ONTARIO WILL
GAURANTEE THE WIDESPREAD PRESENCE OF LAKE EFFECT RAIN SHOWERS. THIS
WILL ESPECIALLY BE THE CASE SOUTHEAST OF BOTH LAKES WHERE POPS WILL
BE CLOSE TO 100 PERCENT.
LAKE INDUCED INSTABILITY WILL INCLUDE CAPES TO 1000 J/KG WHILE NO
CAP WILL BE IN PLACE. WHILE THESE ARE VERY FAVOURABLE CONDITIONS FOR
LAKE INDUCED PCPN...ONLY THE UPPER THIRD PORTION OF THE CLOUDS WILL
BE IN THE MIXED PHASE REGION WITH LITTLE IF ANY GRAUPEL. AS A RESULT
WILL NOT INCLUDE ANY LAKE INDUCED THUNDER WITH THIS ACTIVITY.
THE STACKED STORM SYSTEM WILL BE CENTERED OVER CENTRAL QUEBEC
TUESDAY NIGHT AND WEDNESDAY...WITH CONTINUED COLD ADVECTION LOWERING
H85 TEMPS TO BETWEEN ZERO AND -3C. THE CHILLY CYCLONIC FLOW WILL
CONTINUE TO GENERATE LAKE EFFECT RAIN SHOWERS OVER A LARGE PORTION
OF THE REGION...PARTICULARLY SOUTHEAST OF BOTH LAKES WHERE CAT POPS
WILL BE USED TUESDAY NIGHT AND LIKELY POPS WEDNESDAY. THE COLD
ADVECTINON WILL BE QUITE NOTICEABLE AT THE SFC WHERE TEMPERATURES ON
WEDNESDAY WILL BE IN THE LOW TO MID 50S.
THE GFS AND ECMWF AGREE THAT THE STACKED LOW WILL ROTATE SOUTHWARDS
ACROSS THE ST LAWRENCE VALLEY WEDNESDAY NIGHT AND THURSDAY. THIS
WILL KEEP H85 TEMPS WITHIN A DEGREE OR SO OF ZERO...WITH A POCKET OF
-4C AIR SWINGING ACROSS THE NORTH COUNTRY. WHILE SITES SOUTHEAST OF
THE LAKES WILL STILL HAVE THE CHANCE TO PICK UP SOME LAKE EFFECT
RAIN SHOWERS...SFC RIDGING AND DRIER MID LEVEL AIR MOVING IN FROM
THE WEST WILL GRADUALLY REDUCE THE POPS FROM WEST TO EAST.
&&
.LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/...
THIS PERIOD WILL REMAIN SOMEWHAT UNSETTLED ACROSS THE REGION
ALTHOUGH IT SHOULD BE MILDER. THE HIGHLY AMPLIFIED FLOW WILL BREAK
DOWN INTO A SPLIT FLOW THAT WILL INCLUDE A SHORT LIVED REX BLOCK
OVER THE UPPER MISSISSIPPI VALLEY AND UPPER GREAT LAKES.
FOR THURSDAY NIGHT AND FRIDAY...A RIDGE OVER THE MISSISSIPPI VALLEY
WILL BECOME PINCHED OFF OVER THE GREAT LAKES REGION AS A VIGOROUS
SHORTWAVE WILL DROP OUT OF THE ROCKIES TO THE NORTHERN PLAINS. THE
WEAKENING RIDGE WILL ALLOW OUR SKIES TO TEMPORARILY CLEAR WITH SFC
TEMPS ON FRIDAY STRUGGLING BACK TOWARDS NORMAL LEVELS.
THE DRY WEATHER WILL BE SHORT LIVED THOUGH AS WARM ADVECTION IN
ADVANCE OF THE DIGGING SHORTWAVE WILL PRODUCE DEEP ENOUGH ISENTROPIC
LIFT FOR SHOWERS TO DEVELOP FRIDAY NIGHT AND SATURDAY. THE WARMING
WILL SEND OUR SFC TEMPS BACK INTO THE MID 60S BY SATURDAY AFTERNOON.
THE REX BLOCK WILL THEN TAKE SHAPE OVER THE UPPER GREAT LAKES
SATURDAY NIGHT AND SUNDAY...WITH OUR REGION BEING FOUND WITHIN A
DEEP SOUTHERLY FLOW. AS ONE WOULD EXPECT...TEMPS WITHIN THIS REGIME
WILL AVERAGE ABOVE NORMAL BUT THERE WILL BE THE CHANCE FOR MORE
SHOWERS.
&&
.AVIATION /12Z MONDAY THROUGH FRIDAY/...
A DEEP LOW PRESSURE SYSTEM OVER THE CENTRAL LAKES IS EXPECTED TO
PUSH A STRONG COLD FRONT ACROSS WESTERN AREAS DURING THE
MORNING...FROM 14Z TO 16Z...WITH THE COLD FRONT REACHING AREAS EAST
OF LAKE ONTARIO AROUND 18Z TO 20Z. CONDITIONS ARE EXPECTED TO LOWER
TO THE MVFR RANGE WHEN THE FRONT MOVES THROUGH WITH SHOWERS AND
POSSIBLE TSTMS...EVEN SOME THUNDERSTORMS POSSIBLE WITH LAKE EFFECT
DEVELOPING IN THE AFTERNOON. STRONG WINDS WILL DEVELOP AFTER THE
FRONTAL PASSAGE AND SPREAD EASTWARD ACROSS THE AREA. THE LAKE EFFECT
RAINS ARE EXPECTED TO DEVELOP DURING THE AFTERNOON NE OF LAKE ERIE
IN THE KBUF-KIAG REGION AND POSSIBLY AS FAR INLAND AS JHW AND ROC.
OUTLOOK...
TONIGHT...MVFR/IFR IN SHOWERS.
TUESDAY...MVFR IN SHOWERS.
WEDNESDAY...MVFR/VFR WITH A CHANCE OF SHOWERS.
THURSDAY...MAINLY VFR.
FRIDAY...VFR.
&&
.MARINE...
A GALE WARNING REMAINS IN EFFECT FOR ALL OF LAKES ERIE AND ONTARIO.
DEEP LOW PRESSURE OVER THE UPPER GREAT LAKES WILL SWING A POWERFUL
COLD FRONT ACROSS BOTH LAKES TODAY. THE FRONT WILL MAKE ITS WAY
ACROSS LAKE ERIE BY 14Z...AND ACROSS LAKE ONTARIO BY 18Z. WIDESPREAD
SHOWERS AND POSSIBLY SOME GUSTY THUNDERSTORMS WILL ACCOMPANY THE
FRONTAL PASSAGE...THEN WINDS WILL BECOME SOUTHWERSTERLY AND WILL
INCRAESE TO GALE FORCE IN THE WAKE OF THE FRONT DURING THE MIDDAY
AND AFTERNOON. THE STRONGEST WINDS SHOULD BE FOUND OVER LAKE ERIE.
SOUTHWEST GALES WILL REMAIN IN PLACE OVER LAKE ERIE TONIGHT...BUT
THE PROXIMITY OF THE SFC LOW TO LAKE ONTARIO WILL LIKELY ALLOW WINDS
TO SUBSIDE BELOW GALE FORCE FOR THE BULK OF THE NIGHT.
THE GALES ON LAKE ERIE WILL GRADUALLY SUBSIDE ON TUESDAY AS THE SFC
LOW WILL MOVE AWAY ACROSS THE ST LAWRENCE VALLEY...WHILE WINDS WILL
INCREASE BACK TO NEAR GALES ON LAKE ONTARIO.
ALONG WITH THE STRONG WINDS AND RESULTING HIGH WAVES ON BOTH LAKES
TODAY...THERE WILL BE THE CONCERN OF A SEICHE ON LAKE ERIE. THE
ONSET OF STRONG SOUTHWEST WINDS IN THE WAKE OF THE FRONTAL PASSAGE
THIS MORNING WILL SLOSH WATER IN LAKE ERIE TO THE EAST...WITH A
WATER RISE OF ABOUT 3 FEET EXPECTED ON THE EAST END (INCL. IN
BUFFALO HARBOR). MARINERS SHOULD TAKE ANY PRECAUTIONS TO BOATS THAT
MAY BE TIGHT DOWN IN THESE AREAS.
&&
.BUF WATCHES/WARNINGS/ADVISORIES...
NY...WIND ADVISORY UNTIL MIDNIGHT EDT TONIGHT FOR NYZ001-002-
010>012-019-020-085.
LAKESHORE FLOOD WATCH THROUGH THIS EVENING FOR NYZ010-085.
WIND ADVISORY FROM NOON TODAY TO MIDNIGHT EDT TONIGHT FOR
NYZ003-004-013-014-021.
MARINE...GALE WARNING UNTIL NOON EDT TUESDAY FOR LEZ020-040-041.
GALE WARNING UNTIL 8 AM EDT TUESDAY FOR LOZ042-043-
062-063.
GALE WARNING FROM NOON TODAY TO NOON EDT TUESDAY FOR
LOZ044-045-064-065.
SMALL CRAFT ADVISORY FROM NOON TODAY TO NOON EDT
TUESDAY FOR SLZ022-024.
&&
SYNOPSIS...RSH
NEAR TERM...WCH
SHORT TERM...RSH
LONG TERM...RSH
AVIATION...WCH
MARINE...RSHHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BUFFALO NY 535 AM EDT MON SEP 28 2009 NYZ001-290945- NIAGARA- 535 AM EDT MON SEP 28 2009 ...WIND ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO MIDNIGHT EDT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEW YORK. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. .DEEP LOW PRESSURE OVER THE UPPER GREAT LAKES WILL SWING A POTENT COLD FRONT ACROSS WESTERN NEW YORK THIS MORNING. THIS FRONT WILL PRODUCE WIDESPREAD SHOWERS AND POSSIBLY A GUSTY THUNDERSTORM OR TWO. STRONG SOUTHWEST WINDS WILL THEN DEVELOP IN THE WAKE OF THE FRONT LATER THIS MORNING THROUGH AT LEAST THE FIRST HALF OF TONIGHT WHEN WINDS COULD GUST OVER 45 MPH. SINCE MOST TREES ARE STILL FULLY FOLIATED...THERE IS AN INCREASED POTENTIAL FOR DOWNED TREE LIMBS WHICH COULD LEAD TO SOME POWER OUTAGES. ALONG WITH THE POTENTIAL FOR STRONG WINDS...THERE COULD BE SOME HYDROLOGIC CONCERNS AS MODERATE TO HEAVY LAKE EFFECT RAIN COULD PRODUCE RAINFALL AMOUNTS IN EXCESS OF AN INCH AND A HALF LATE TODAY THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF NYZ010-290945- NORTHERN ERIE- 535 AM EDT MON SEP 28 2009 ...LAKESHORE FLOOD WATCH IN EFFECT THROUGH THIS EVENING... ...WIND ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO MIDNIGHT EDT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEW YORK. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. LAKESHORE FLOOD WATCH. WIND ADVISORY. .DEEP LOW PRESSURE OVER THE UPPER GREAT LAKES WILL SWING A POTENT COLD FRONT ACROSS WESTERN NEW YORK THIS MORNING. THIS FRONT WILL PRODUCE WIDESPREAD SHOWERS AND POSSIBLY A GUSTY THUNDERSTORM OR TWO. STRONG SOUTHWEST WINDS WILL THEN DEVELOP IN THE WAKE OF THE FRONT LATER THIS MORNING THROUGH AT LEAST THE FIRST HALF OF TONIGHT WHEN WINDS COULD GUST OVER 45 MPH. SINCE MOST TREES ARE STILL FULLY FOLIATED...THERE IS AN INCREASED POTENTIAL FOR DOWNED TREE LIMBS WHICH COULD LEAD TO SOME POWER OUTAGES. ALONG WITH THE POTENTIAL FOR STRONG WINDS...THERE COULD BE SOME HYDROLOGIC CONCERNS AS MODERATE TO HEAVY LAKE EFFECT RAIN COULD PRODUCE RAINFALL AMOUNTS IN EXCESS OF AN INCH AND A HALF LATE TODAY THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF NYZ003-004-013-014-021-290945- MONROE-WAYNE-LIVINGSTON-ONTARIO-ALLEGANY- 535 AM EDT MON SEP 28 2009 ...WIND ADVISORY IN EFFECT FROM NOON TODAY TO MIDNIGHT EDT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEW YORK. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. .DEEP LOW PRESSURE OVER THE UPPER GREAT LAKES WILL SWING A POTENT COLD FRONT ACROSS WESTERN NEW YORK THIS MORNING. THIS FRONT WILL PRODUCE WIDESPREAD SHOWERS AND POSSIBLY SOME GUSTY THUNDERSTORMS. STRONG SOUTHWEST WINDS WILL THEN DEVELOP IN THE WAKE OF THE FRONT LATER THIS MORNING THROUGH AT LEAST THE FIRST HALF OF TONIGHT WHEN WINDS COULD GUST OVER 45 MPH. SINCE MOST TREES ARE STILL FULLY FOLIATED...THERE IS AN INCREASED POTENTIAL FOR DOWNED TREE LIMBS WHICH COULD LEAD TO SOME POWER OUTAGES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF NYZ002-011-012-019-020-290945- ORLEANS-GENESEE-WYOMING-CHAUTAUQUA-CATTARAUGUS- 535 AM EDT MON SEP 28 2009 ...WIND ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO MIDNIGHT EDT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEW YORK. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. .DEEP LOW PRESSURE OVER THE UPPER GREAT LAKES WILL SWING A POTENT COLD FRONT ACROSS WESTERN NEW YORK THIS MORNING. THIS FRONT WILL PRODUCE WIDESPREAD SHOWERS AND POSSIBLY SOME GUSTY THUNDERSTORMS. STRONG SOUTHWEST WINDS WILL THEN DEVELOP IN THE WAKE OF THE FRONT LATER THIS MORNING THROUGH AT LEAST THE FIRST HALF OF TONIGHT WHEN WINDS COULD GUST OVER 45 MPH. SINCE MOST TREES ARE STILL LARGELY FOLIATED...THERE IS AN INCREASED POTENTIAL FOR DOWNED TREE LIMBS WHICH COULD LEAD TO SOME POWER OUTAGES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF NYZ085-290945- SOUTHERN ERIE- 535 AM EDT MON SEP 28 2009 ...LAKESHORE FLOOD WATCH IN EFFECT THROUGH THIS EVENING... ...WIND ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO MIDNIGHT EDT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEW YORK. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. LAKESHORE FLOOD WATCH. WIND ADVISORY. .DEEP LOW PRESSURE OVER THE UPPER GREAT LAKES WILL SWING A POTENT COLD FRONT ACROSS WESTERN NEW YORK THIS MORNING. THIS FRONT WILL PRODUCE WIDESPREAD SHOWERS AND POSSIBLY A GUSTY THUNDERSTORM OR TWO. STRONG SOUTHWEST WINDS WILL THEN DEVELOP IN THE WAKE OF THE FRONT LATER THIS MORNING THROUGH AT LEAST THE FIRST HALF OF TONIGHT WHEN WINDS COULD GUST OVER 45 MPH. SINCE MOST TREES ARE STILL FULLY FOLIATED...THERE IS AN INCREASED POTENTIAL FOR DOWNED TREE LIMBS WHICH COULD LEAD TO SOME POWER OUTAGES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF NYZ005>008-290945- NORTHERN CAYUGA-OSWEGO-JEFFERSON-LEWIS- 535 AM EDT MON SEP 28 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NEW YORK. .DAY ONE...TODAY AND TONIGHT. DEEP LOW PRESSURE OVER THE UPPER GREAT LAKES WILL SWING A POTENT COLD FRONT ACROSS THE REGION DURING THE MIDDAY HOURS. WIDESPREAD SHOWERS AND GUSTY THUNDERSTORMS WILL ACCOMPANY THE PASSAGE OF THIS FRONT...WITH SOME STORMS POSSIBLY CONTAINING DAMAGING WINDS. EXPECT GUSTY WINDS BEHIND THE FRONT...WITH GUSTS IN EXCESS OF 40 MPH POSSIBLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF LEZ020-040-041-290945- UPPER NIAGARA RIVER AND BUFFALO HARBOR- LAKE ERIE NEARSHORE WATERS FROM RIPLEY TO DUNKIRK- LAKE ERIE NEARSHORE WATERS FROM DUNKIRK TO BUFFALO- 535 AM EDT MON SEP 28 2009 ...GALE WARNING IN EFFECT UNTIL NOON EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. GALE FORCE WINDS ARE POSSIBLE MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF LOZ042-043-062-063-290945- LAKE ONTARIO NEARSHORE WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH- LAKE ONTARIO NEARSHORE WATERS FROM HAMLIN BEACH TO SODUS BAY- LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH- LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO SODUS BAY- 535 AM EDT MON SEP 28 2009 ...GALE WARNING IN EFFECT UNTIL 8 AM EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ONTARIO. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. GALE FORCE WINDS ARE POSSIBLE TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF LOZ044-045-064-065-290945- LAKE ONTARIO NEARSHORE WATERS FROM SODUS BAY TO MEXICO BAY- LAKE ONTARIO NEARSHORE WATERS FROM MEXICO BAY TO THE SAINT LAWRENCE RIVER-LAKE ONTARIO OPEN WATERS FROM SODUS BAY TO MEXICO BAY- LAKE ONTARIO OPEN WATERS FROM MEXICO BAY TO THE SAINT LAWRENCE RIVER- 535 AM EDT MON SEP 28 2009 ...GALE WARNING IN EFFECT FROM NOON TODAY TO NOON EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ONTARIO. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. GALE FORCE WINDS ARE POSSIBLE TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF SLZ022-024-290945- SAINT LAWRENCE RIVER FROM CAPE VINCENT TO OGDENSBURG- SAINT LAWRENCE RIVER FROM OGDENSBURG TO SAINT REGIS- 535 AM EDT MON SEP 28 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEW YORK WATERS OF THE SAINT LAWRENCE RIVER. .DAY ONE...TODAY AND TONIGHT. SMALL CRAFT ADVISORY IS IN EFFECT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. WINDS MAY APPROACH GALE FORCE MONDAY AND TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN BUFFALO CAN BE FOUND ON THE INTERNET AT HTTP://WWW.WEATHER.GOV/BUF RSH
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 842 AM EDT MON SEP 28 2009 NYZ010-012-020-021-085-281345- ALLEGANY NY-CATTARAUGUS NY-ERIE NY-WYOMING NY- 842 AM EDT MON SEP 28 2009 ...LINE OF STRONG THUNDERSTORMS MOVING ACROSS THE AREA... * AT 833 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING STRONG GUSTY WINDS...AND HEAVY RAIN. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM BUFFALO SOUTHWARD TO ALLEGANY PARK...AND MOVING EAST AT 40 MPH. * STRONG STORMS WITH GUSTY WINDS WILL BE NEAR... HOLLAND AT 850 AM EDT... ST. BONAVENTURE AT 855 AM EDT... OLEAN AT 905 AM EDT... CENTERVILLE AT 910 AM EDT... THESE STORMS HAVE THE POTENTIAL TO BECOME SEVERE AND PRODUCE DAMAGING WINDS. STRONGER WINDS WILL OCCUR LATER IN THE DAY BEHIND THIS LINE OF STORMS. THOMAS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 1031 AM EDT MON SEP 28 2009 NYZ010-019-085-281615- NORTHERN ERIE-CHAUTAUQUA-SOUTHERN ERIE- INCLUDING THE CITIES OF...BUFFALO...JAMESTOWN...ORCHARD PARK... SPRINGVILLE 1031 AM EDT MON SEP 28 2009 ...STRONG THUNDERSTORMS OVER LAKE ERIE THIS MORNING... SEVERAL THUNDERSTORMS HAVE BLOSSOMED ALONG THE COLD FRONT OVER LAKE ERIE THIS MORNING. THESE STORMS AT 1025 AM ARE LOCATED FROM NEAR PORT COLBORNE...SOUTHWARD TO BETWEEN LONG POINT AND DUNKIRK AND DOWN TOWARDS ERIE PENNSYLVANIA. IN ADDITION TO THE CLOUD TO GROUND LIGHTNING STRIKES THE THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE WIND GUSTS OVER 45 MPH ESPECIALLY NEAR THE LAKE SHORE. SMALL HAIL IS ALSO POSSIBLE WITH THESE STORMS. THE STORMS WILL BE NEAR THE VICINITIES OF RIPLEY AND WESTFIELD BETWEEN 1030 AM AND 1045 AM. AS ACTIVITY HOLDS TOGETHER THESE STORMS WILL BE NEAR FREDONIA...DUNKIRK AND SILVER CREEK BETWEEN 1045 AM AND 1115 AM. AS THESE STORMS ADVANCE NORTHEASTWARD UP LAKE ERIE THEY WILL REACH THE VICINITY OF BUFFALO LATER IN THE MORNING.
The Buffalo radar (KBUF), 48 km away, was scanning. The volume nearest the first event began at 15:05 UTC.
20 thunderstorm wind. Local standard time, as filed.
Law enforcement reported trees down on Long Beach Lane.
Law enforcement reports trees and wires down on Seneca Avenue.
Law enforecment reported trees and wires down on Oxford Avenue.
Law enforecment reported trees and wires down on Tremont Avenue.
Law enforecment reported trees and debris on Route 33.
Law enforecment reported trees down on Ewings Road.
Law enforecment reported trees and wires down on Chestnut and McCullum Streets.
Law enforecment reported trees down near Transit Road.
A gust to 58 mph was measured at Star Point High School.
Law enforcement reported trees and wires down on Crimson Heights Road.
Law enforcement reported trees and wires down on Zig Zag Road.
Law enforcement reported trees and wires down on Kendall Road.
Law enforcement reported a pole down in Byron.
Law enforcement reported trees and wires down in Brockport.
Law enforcement reported trees and wires down on Underwood and Railroad Avenues.
Law enforcement reported trees and wires down near Ridge Road West.
Law enforcement reported trees and wires down on Lake Street.
Law enforcement reported trees and wires down on Sky Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2009Every state in 2009This day in weather historyWarnings in New York, September 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 197516, 197517, 197531, 197518, 197519, 197520, 197521, 197522, 197523, 197532, 197524, 197525, 197526, 197527, 197528, 197529, 197530, 197533, 197534, 197535.