3 thunderstorm wind, as filed by the National Weather Service.
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 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 New York, NY wrote its last area forecast discussion before the first event at Jul 21, 1:45 PM EST, 5 hours 9 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE UPTON NY 245 PM EDT MON JUL 21 2003 .SHORT TERM...THE WARM FRONT CONTINUES TO LIFT SLOWLY NORTH ACROSS THE COASTAL WATERS JUST SOUTH OF LONG ISLAND. MIXING HAS ALLOWED CEILINGS TO RISE WITH PLENTY OF BREAKS FROM NYC WEST AND NORTH. LOOK FOR INSTABILITY SCT SHOWERS AND TSTMS TO DEVELOP AND MOVE NE ACROSS THE REGION IN THIS AREA THROUGH AND JUST AFTER SUNSET. && .LONG TERM...AS THE UPSTREAM UPPER TROUGH DEEPENS AND INCHES EAST...A SERIES OF WAVES WILL FORM AND ADVECT AROUND IT. TRYING TO TIME THESE WAVES...WHICH WILL BE PRECEDED BY LARGE CLUSTERS OF HEAVY SHOWERS AND TSTMS...WILL BE DIFFICULT AT BEST. THE MAIN THREAT FOR HAZARDOUS WEATHER WILL BE THE POTENTIAL FOR WIDESPREAD URBAN FLOODING. PRECIPITABLE WATER CONTENTS...WHICH WAS ESTIMATED AT 1.40 INCHES ON OKXS 12Z SOUNDING...CONTINUE TO INCREASE ACROSS THE AREA. CONCERNING THE FIRST WAVE...FORECAST MODELS GENERALLY AGREE ON TIMING BETWEEN 06Z TONIGHT AND 18Z TUE...WITH THE HIGHEST LIFT AND HEAVIEST QPF AXIS FROM NYC NORTH AND WEST...WHICH IS WHERE I WILL WEIGHT THE HIGHEST POPS. THE SECOND WAVE...WILL TRACK FURTHER EAST AND PROVIDE WIDESPREAD QPF ACROSS THE ENTIRE HSA DURING WED...WHEN THE GREATEST POTENTIAL FOR URBAN FLOODING WILL EXIST. ITS A BIT TOO EARLY TO GO WITH A FOURTH PERIOD FLOOD WATCH FOR WED...BUT I WILL ISSUE A FLOOD POTENTIAL OUTLOOK FOR WED. && .AVIATION...LOW CLDS AND FOG ASSOCIATED WITH THE WARM FRONT CONTINUE OVER PARTS OF THE NYC AREA...ESPECIALLY LONG ISLAND AND CT. A STRONG SW FLOW IN THE LOWER LVLS SHOULD RESULT IN IMPROVING CONDITIONS IN MOST AREAS...ALTHOUGH ISP AND GON WILL BE SLOWER TO IMPROVE AND WITH THE FLOW OFF THE WATER...ST MAY FORM AGAIN TNGT IN THOSE AREAS. OTHERWISE...SOME WEAK RW- POSSIBLE THIS AFTN. THRU 18Z TUES...THE BEST CHC FOR RW/TRW WILL BE TUES MORN AS THE SYS TO THE W MOVES INTO THE LOCAL AREA. && .MARINE...SCA UP FOR OCEAN WATERS. SFC PRES GRAD TIGHTENS BY THIS EVE...WINDS MAY INCREASE TO SCA CRITERIA. VIS LOCALLY 1 TO 3 NM IN FOG TNGT...WINDS SHOULD KEEP THE FOG FROM GETTING TOO DENSE. OTHERWISE...WITH THE PROLONGED SSW FLOW OVER THE NEXT FEW DAYS...SCA CRITERIA FOR THE OCEAN WATERS SHOULD CONTINUE FOR SEAS THRU FRI...POSSIBLY SCA WINDS AT TIMES. CONDITIONS SHOULD IMPROVE BY LATE FRI AS THE SFC PRES GRAD BREAKS DOWN. && .HYDROLOGY...PERIODS OF HEAVY RAIN ARE POSSIBLE FROM LATE TONIGHT THROUGH TUESDAY WITH ONE TO TWO INCHES POSSIBLE...MAINLY ACROSS THE WESTERN PART OF THE AREA...WEST AND NORTH OF NYC THROUGH WESTERN CT. MINOR URBAN FLOODING WOULD OCCUR WITH THESE AMOUNTS. HOWEVER...THIS AREA WILL BE PRIMED FOR ADDITIONAL HEAVY RAIN...ANOTHER 1 TO 2 INCHES FOR WED...WHEN FLOODING OF RIVERS AND STREAMS MAY BECOME A PROBLEM...IN ADDITION TO SIGNIFICANT URBAN FLOODING...WHICH IS WHY I WILL BE ISSUING A FLOOD POTENTIAL OUTLOOK. && .OKX CURRENT WATCHES/WARNINGS/ADVISORIES... CT...FLOOD POTENTIAL OUTLOOK CTZ005>012 FOR WED. NJ...FLOOD POTENTIAL OUTLOOK NJZ002>006-011 FOR WED. NY...FLOOD POTENTIAL OUTLOOK NYZ067>081 FOR WED. MARINE...SMALL CRAFT ADVISORY FOR ANZ355-353-350. THE OKX TEAM FOR TODAY... PUBLIC...GC AVIATION...EH MARINE...GC AND EH NOWCASTS...TM OBSERVATIONS...TM
CTZ005>012-NJZ002>006-011-NYZ067>081-221000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE UPTON NY 445 PM EDT MON JUL 21 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST NEW YORK... NORTHEAST NEW JERSEY AND SOUTHERN CONNECTICUT. .DAY ONE...TODAY THERE IS A CHANCE OF SEVERE THUNDERSTORMS THROUGH THIS EVENING. THE STORM PREDICTION CENTER HAS PLACED THE LOWER HUDSON VALLEY AND PARTS OF NORTHERN NEW JERSEY UNDER A MODERATE RISK FOR SEVERE THUNDERSTORMS THROUGH THIS EVENING. THIS INCLUDES PEOPLE IN THE FOLLOWING COUNTIES...ORANGE...PUTNAM...ROCKLAND AND WESTCHESTER IN NY AND PASSAIC AND BERGEN COUNTIES IN NORTHEAST NJ. THESE THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE DAMAGING WIND GUSTS AND TORRENTIAL RAIN. SMALL CRAFT ADVISORIES HAVE BEEN POSTED ON THE ATLANTIC OCEAN COASTAL WATERS AND WILL LIKELY BE NEEDED THROUGH WEDNESDAY...MAINLY FOR ROUGH SEAS. .DAYS TWO THROUGH SEVEN... SHOWERS AND THUNDERSTORMS WILL BE LIKELY TUESDAY AND TUESDAY NIGHT. SOME OF THE THUNDERSTORMS MAY REACH SEVERE LIMITS WITH DAMAGING WIND GUSTS THE MAIN THREAT. THE STORM PREDICTION CENTER HAS PLACED THE AREA IN A SLIGHT RISK FOR SEVERE WEATHER TUESDAY AND TUESDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION IS REQUESTED STARTING AT 5 PM THIS EVENING. ADDITIONAL ACTIVATIONS MAY BE REQUIRED DURING THE NEXT FEW DAYS. GC
NJZ002>004-NYZ067>070-220300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE UPTON NY 455 PM EDT MON JUL 21 2003 ...SEVERE THUNDERSTORMS ARE POSSIBLE AFTER 6:30 PM ACROSS PARTS OF THE LOWER HUDSON VALLEY AND NORTHEAST NJ... A LINE OF THUNDERSTORMS MOVING EAST ACROSS CENTRAL PENNSYLVANIA MAY PRODUCE SCATTERED SEVERE THUNDERSTORMS ACROSS PARTS OF THE LOWER HUDSON VALLEY AND NORTHEAST NJ AFTER 6:30 PM. THE STORM PREDICTION CENTER HAS PLACED THIS AREA UNDER A MODERATE RISK FOR SEVERE THUNDERSTORMS THROUGH THIS EVENING. THE MAIN HAZARDOUS WEATHER THREAT WILL BE FOR DAMAGING WIND GUSTS ASSOCIATED WITH THE LINE OF THUNDERSTORMS. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES CONCERNING THE POSSIBILITY OF WATCHES AND WARNINGS. GC
The Binghamton radar (KBGM), 141 km away, was scanning. The volume nearest the first event began at 23:52 UTC.
3 thunderstorm wind. Local standard time, as filed.
Law Enforcement reported that large tree branches and power lines were knocked down by strong thunderstorm winds.
Several spotters and law enforcement agencies reported downed trees and power lines in New Windsor . There were also reports of widespread power outages throughout the town.
A trained spotter reported that numerous trees were knocked down in Warwick.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2003Every state in 2003This day in weather historyWarnings in New York, July 2003
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: 5329384, 5329385, 5329386.