An isolated severe thunderstorm moved across Wayne county during the pre-dawn hours producing damaging winds that downed trees and power lines in the town of Lyons.
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The episode as NWS BUF wrote it up.
An isolated severe thunderstorm moved across Wayne county during the pre-dawn hours producing damaging winds that downed trees and power lines in the town of Lyons.
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 Jun 26, 2:52 AM EST, 1 hour 53 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BUFFALO NY 352 AM EDT FRI JUN 26 2009 .SYNOPSIS... AN UPPER LEVEL LOW WILL KEEP THE REGION UNSTABLE TODAY SO ALTHOUGH THE VAST MAJORITY OF THE TIME WILL BE DRY...THERE WILL BE THE RISK OF A FEW SHOWERS. HIGH PRESSURE WILL THEN MOVE EAST ACROSS THE GREAT LAKES AND PROVIDE FINE SEASONAL WEATHER ON SATURDAY. ANOTHER UPPER LOW WILL APPROACH LATER SUNDAY WITH THE THREAT OF SHOWERS. THIS LOW WILL REMAIN NEARLY STATIONARY OVER THE EASTERN LAKES THROUGH AT LEAST WEDNESDAY WHICH WILL RESULT IN UNSETTLED WEATHER FOR MOST OF NEXT WEEK. && .NEAR TERM /THROUGH TONIGHT/... AS OF 0745Z...NARROW STRIP OF SHOWERS/THUNDERSTORMS STRETCHES FROM THE NIAGARA PENINSULA EASTWARD INTO WYOMING AND GENESEE COUNTIES...IN ADVANCE OF AN ILL-DEFINED SHORTWAVE/SURFACE TROUGH DRAPED SOUTHWESTWARD ACROSS LAKE ERIE. ALL OF THE ACTIVITY IS DRIFTING EAST-SOUTHEAST IN ASSOCIATION WITH THE PARENT SHORTWAVE...AND SHOULD CONTINUE TO DO SO THROUGH EARLY MORNING...AFFECTING PORTIONS OF THE NIAGARA FRONTIER...SOUTHERN TIER...AND INTERIOR SECTIONS OF THE FINGER LAKES. WILL COVER THIS WITH A MENTION OF HIGH CHANCE POPS AND SCATTERED SHOWERS/STORMS THROUGH 12Z...AFTER WHICH TIME THIS ACTIVITY SHOULD BE PRETTY MUCH OUT OF THE AREA. THEREAFTER...EXPECT A RELATIVE LULL IN THE ACTION FOR A FEW HOURS THIS MORNING...BEFORE MORE DIURNAL CONVECTION DEVELOPS DURING THE LATE MORNING AND AFTERNOON HOURS IN ASSOCIATION WITH INCREASING DAYTIME INSTABILITY...AND THE APPROACH/PASSAGE OF THE MAIN UPPER TROUGH AXIS/ASSOCIATED STRONG SHORTWAVE. WHILE THE ACTIVITY WILL NOT BE AS WIDESPREAD/ CONCENTRATED AS WHAT WAS SEEN YESTERDAY...THE EXPECTED INSTABILITY WILL STILL BE PLENTY STRONG ENOUGH / LIS OF -4 TO -9 AND SBCAPES OF 1000-1500 J/KG / AND DEEP ENOUGH TO ONCE AGAIN LEAD TO THE POTENTIAL FOR SOME STRONG TO MARGINALLY SEVERE PULSE STORMS...ESPECIALLY CONSIDERING THE CONTINUED WEST-NORTHWESTERLY FLOW ALOFT. FOR NOW...WILL COVER ALL OF THIS WITH BROADBRUSH SCATTERED SHOWERS/STORMS DURING THE LATE MORNING AND AFTERNOON HOURS. ANY DIURNAL CONVECTION FROM THIS AFTERNOON SHOULD GRADUALLY DIE DOWN THIS EVENING WITH THE LOSS OF DIURNAL HEATING...WITH THE EXCEPTION OF AREAS EAST OF LAKE ONTARIO WHERE A SHOWER THREAT SHOULD LINGER THROUGH THE NIGHT GIVEN THE CLOSER PROXIMITY TO THE UPPER LOW OVER NEW ENGLAND. && .SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/... THE RIDGE OVER THE UPPER GREAT LAKES WILL EASE ACROSS THE OHIO VALLEY AND EASTERN GREAT LAKES SATURDAY AND SATURDAY NIGHT. WILL AGAIN INCLUDE THE MENTION OF A BRIEF SHOWER OR TWO EAST OF LAKE ONTARIO DURING THE DAY SATURDAY...HOWEVER THE VAST MAJORITY OF SATURDAY AND SATURDAY NIGHT SHOULD BE RAINFREE. PARTLY TO MOSTLY SUNNY SKIES AND H85 TEMPS OF +14C WILL SUPPORT MAX TEMPS IN THE UPPER 70S TO LOWER 80S. ON SUNDAY...CONDITIONS WILL DETERIORATE FROM WEST TO EAST AS A STRONG DIGGING SHORTWAVE OVER THE UPPER GREAT LAKES WILL CIRCULATE A COLD FRONT ACROSS THE REGION. THERE IS SOME DISCREPANCY IN THE TIMING AMONG THE MODELS WITH THE GFS FASTEST AND ECMWF SLOWER AND HOLDING SHOWERS OFF UNTIL SUN EVENING. DELAYED THE POPS UNTIL THE AFTERNOON AND LOWERED POPS A TOUCH. THIS ACTIVITY WILL BE WEAKENING AS IT ENCOUNTERS SUBSIDENCE OVER OUR AREA ON BACKSIDE OF SLOWLY DEPARTING UPPER LOW OVER NEW ENGLAND...A TRAFFIC JAM OF SORTS. A DRY SLOT WILL THEN WORK ITS WAY NORTHWARDS ACROSS OUR REGION IN THE WAKE OF THE COLD FRONT SUNDAY NIGHT. THIS SHOULD ALLOW THE BULK OF ANY LEFTOVER SHOWERS TO END FROM WEST TO EAST. && .LONG TERM /MONDAY THROUGH THURSDAY/... THIS PERIOD WILL BE QUITE UNSETTLED AS AN ANOMALOUSLY DEEP H5 CLOSED LOW WILL BE NEARLY STATIONARY OVER THE EASTERN GREAT LAKES. WHILE THERE WILL BE FREQUENT RAINFREE PERIODS...SOME FOR AS LONG AS 3 TO 6 HOURS...THERE WILL ALSO BE FAIRLY WIDESPREAD SHOWER ACTIVITY. WILL COVER THE BULK OF THIS PERIOD WITH CHC POPS FOR SHOWERS AND FINE TUNE AS THE EVENT UNFOLDS AND BECOMES MORE MANAGEABLE BY THE GUIDANCE PACKAGES. WILL INCLUDE THUNDER IN MONDAYS FORECAST ONLY AS REGION WILL BE ON EAST (WARMER) SIDE OF UPPER LOW THEN. ALONG WITH THE FREQUENT SHOWERS...TEMPS DURING THIS PERIOD WILL AVERAGE A FEW DEGREES BELOW NORMAL. THE NICEST DAY OF THIS STRETCH WILL LIKELY BE THURSDAY AS THE CLOSED LOW WILL START TO OPEN UP AND LIFT OUT TO OUR EAST. && .AVIATION /08Z FRIDAY THROUGH TUESDAY/... AS OF 06Z...ANOTHER CLUSTER OF SHOWERS...WITH SOME EMBEDDED THUNDER...WAS IN THE PROCESS OF DROPPING EAST SOUTHEAST ACROSS THE NIAGARA PENINSULA...WITH SOME ADDITIONAL SCATTERED SHOWERS FOUND IN ADVANCE OF THIS AREA ACROSS LAKE ERIE AND SOUTHWESTERN NY. ALL OF THIS ACTIVITY WILL CONTINUE ON AN EAST-SOUTHEASTERLY TRACK THROUGH SUNRISE...AFFECTING AREAS ALONG AND SOUTH OF A KIAG-KPEO LINE WITH POSSIBLE BRIEF MVFR RESTRICTIONS. OTHERWISE...CONDITIONS WILL GENERALLY BE VFR INTO MID MORNING...WITH SOME PATCHY IFR FOG POSSIBLE ACROSS THE SOUTHERN TIER...AND PATCHY MVFR FOG POSSIBLE ELSEWHERE AS THE DAY PROGRESSES FURTHER...THE COMBINATION OF DIURNAL HEATING AND CONTINUED MID AND UPPER LEVEL TROUGHING WILL LEAD TO THE DEVELOPMENT OF MORE SCATTERED CONVECTION BY LATE MORNING...WHICH WILL THEN LIKELY CONTINUE THROUGH THE AFTERNOON AND EARLY EVENING... BEFORE WANING AFTER SUNSET. AS THE EXACT PLACEMENT AND TIMING OF THE CONVECTION REMAINS IMPOSSIBLE TO PINPOINT AT THIS JUNCTURE...WILL JUST COVER THIS IN THE TAFS WITH GENERIC VCSH/CB QUALIFIERS FOR NOW. GENERAL VFR CONDITIONS ARE EXPECTED TO BE THE RULE OUTSIDE OF ANY SHOWERS AND STORMS...WITH REDUCTIONS TO MVFR POSSIBLE WITHIN WHATEVER ACTIVITY DEVELOPS. AFTER SUNSET...EXPECT GENERAL VFR CONDITIONS TO PREVAIL FOR THE BALANCE OF THE EVENING. OUTLOOK... SATURDAY...VFR. SUNDAY THROUGH TUESDAY...VFR/MVFR WITH A CHANCE OF SHOWERS/THUNDERSTORMS. && .MARINE... ASIDE FROM A SLIGHT CHANCE OF A SHOWER TODAY...BOATING CONDITIONS WILL BE FAVORABLE THROUGH SUNDAY MORNING WITH GENERALLY LIGHT WINDS. AN UPPER LOW WILL APPROACH THE AREA ON MONDAY AND LINGER THROUGH WEDNESDAY...BUT ITS ASSOCIATED SURFACE LOW WILL LIE VERY CLOSE TO OUR AREA...SO WINDS WILL NOT BE A FACTOR. THERE WILL BE SHOWER THREAT DAILY...WITH HIGHEST POSSIBILITIES DURING THE AFTERNOON AND EARLY EVENING HOURS EACH DAY. && .BUF WATCHES/WARNINGS/ADVISORIES... NY...NONE. MARINE...NONE. && SYNOPSIS...SFM NEAR TERM...JJR SHORT TERM...SFM LONG TERM...SFM AVIATION...JJR MARINE...SFM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BUFFALO NY 518 AM EDT FRI JUN 26 2009 NYZ001>008-010>014-019>021-085-270930- NIAGARA-ORLEANS-MONROE-WAYNE-NORTHERN CAYUGA-OSWEGO-JEFFERSON-LEWIS- NORTHERN ERIE-GENESEE-WYOMING-LIVINGSTON-ONTARIO-CHAUTAUQUA- CATTARAUGUS-ALLEGANY-SOUTHERN ERIE- 518 AM EDT FRI JUN 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND NORTH CENTRAL NEW YORK. .DAY ONE...TODAY AND TONIGHT. ISOLATED STRONG THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. 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-LOZ042>045-062>065-SLZ022-024-270930- UPPER NIAGARA RIVER AND BUFFALO HARBOR- LAKE ERIE NEARSHORE WATERS FROM RIPLEY TO DUNKIRK- LAKE ERIE NEARSHORE WATERS FROM DUNKIRK TO BUFFALO- LAKE ONTARIO NEARSHORE WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH- LAKE ONTARIO NEARSHORE WATERS FROM HAMLIN BEACH TO SODUS BAY- 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 THE NIAGARA RIVER TO HAMLIN BEACH- LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO SODUS BAY- LAKE ONTARIO OPEN WATERS FROM SODUS BAY TO MEXICO BAY- LAKE ONTARIO OPEN WATERS FROM MEXICO BAY TO THE SAINT LAWRENCE RIVER- SAINT LAWRENCE RIVER FROM CAPE VINCENT TO OGDENSBURG- SAINT LAWRENCE RIVER FROM OGDENSBURG TO SAINT REGIS- 518 AM EDT FRI JUN 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE ONTARIO AND SAINT LAWRENCE RIVER. .DAY ONE...TODAY AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. 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 SFM
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 253 AM EDT FRI JUN 26 2009 NYZ001-010-085-260830- NIAGARA-NORTHERN ERIE-SOUTHERN ERIE- INCLUDING THE CITIES OF...NIAGARA FALLS...BUFFALO... ORCHARD PARK...SPRINGVILLE 253 AM EDT FRI JUN 26 2009 ...THUNDERSTORMS TO MOVE ACROSS THE METRO AREA... AT 250 AM...A CLUSTER OF THUNDERSTORMS EXTENDED FROM GRAND ISLAND AND TONAWANDA...SOUTHWEST TO THE NORTH SHORE OF LAKE ERIE ABOUT 30 MILES WEST OF BUFFALO. THESE STORMS WERE MOVING EAST AT 30 MPH AND WILL MOVE ACROSS THE BUFFALO METRO AREA THROUGH 430 AM. LOOK FOR FREQUENT LIGHTNING AND BRIEF DOWNPOURS WITH THESE STORMS. POOR DRAINAGE FLOODING IS POSSIBLE IN ANY OF THE DOWNPOURS. EXERCISE CAUTION IN DRIVING OVERNIGHT. SFM
The Binghamton radar (KBGM), 126 km away, was scanning. The volume nearest the first event began at 09:44 UTC.
1 thunderstorm wind. Local standard time, as filed.
An isolated severe thunderstorm moved across Wayne county during the pre-dawn hours producing damaging winds that downed trees and power lines in the town of Lyons.
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, June 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: 181476.