Alert archive / New York / Flash Flood Warnings in 1999

Flash Flood Warning 72, NWS New York, NY

September 17, 1999Orange County, Putnam County, New York

NWS New York, NY issued this flash flood warning at Sep 17, 1999, 7:49 AM EDT for Orange County, Putnam County, New York. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 17, 1999, 7:49 AM EDT (11:49 UTC)
Expired: Sep 17, 1999, 3:00 PM EDT
In force: 7 hr
Issued by: NWS New York, NY
Area: Whole counties

Counties Orange County, NY, Putnam County, NY

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 11.8 hours before the alert went out and 115 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 385 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 256 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KNYC 171149
FFWNYC
CTC001-009-NJC003-013-017-031-039-NYC071-079-087-119-171900-

FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
749 AM EDT FRI SEP 17 1999

THE NATIONAL WEATHER SERVICE IN NEW YORK CONTINUES THE

* FLOOD WARNINGS FOR SMALL STREAMS AND URBAN AREAS IN...

  SOUTHEASTERN NEW YORK...
  ORANGE...ROCKLAND...PUTNAM...AND WESTCHESTER COUNTIES.

  NORTHEASTERN NEW JERSEY...
  BERGEN...ESSEX...HUDSON...AND PASSAIC COUNTIES.

  SOUTHWESTERN CONNECTICUT...
  FAIRFIELD AND NEW HAVEN COUNTIES.

* UNTIL 300 PM EDT...

* MAJOR SMALL STREAM FLOODING WILL CONTINUE THIS MORNING.
  MOST RIVERS AND STREAMS IN THE WARNING AREA HAVE CRESTED.
  HOWEVER MANY OF THE STREAMS REMAIN OUT OF THEIR BANKS.

  IN UNION COUNTY AT SPRINGFIELD THE RAHWAY RIVER HAS CRESTED
  BUT REMAINS ABOVE FLOOD STAGE.

  IN NEW HAVEN COUNTY THE QUINNIPIAC RIVER AT WALLINGFORD IS
  ABOVE FLOOD STAGE AND SOWLY RISING.

* IF YOU LIVE NEAR A STREAM AND EXPERIENCE RISING WATE.R LEVELS...
  MOVE TO HIGHER GROUND IMMEDIATELY. DO NOT DRIVE YOUR AUTOMOBILE
  THROUGH FLOODED ROADWAYS OR THROUGH POLICE BARRICADES. FIND AN
  ALTERNATE ROUTE.

.END/MCKILLOP

What forecasters said that day

The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Sep 17, 3:30 AM EDT, 4 hours 19 minutes earlier.

Area forecast discussion, Sep 17, 3:30 AM EDT, 4 hours 19 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW YORK NY
330 AM EDT FRI SEP 17 1999

...WILL HOLD ALL PRODUCTS UNTIL 5 AM TO COORDINATE WITH TPC...

PLAN TO ISSUE A WIND ADVISORY FOR ALL ZONES AND A HEAVY SURF
ADVISORY AS OF 5 AM. FLOOD WARNINGS CONTINUE UNTIL 8 AM. RIVER FLOOD
WARNINGS IN EFFECT.

FLOYD PRODUCED FLOODING OF BIBLICAL PROPORTIONS OVER THE WESTERN
PORTIONS OF OUR COUNTY WARNING AREA. 10 TO 15 INCHES IN LESS THAN 24
HOURS. OUR PUBLIC INFORMATION STATEMENT HAS RAINFALL AND WIND
INFORMATION. HIGHEST WIND I FOUND WAS 64 MPH AT SHINNECOCK INLET.
HIGHEST ASOS WAS 53 AT EWR. ONE LOCAL STORM REPORT OUT. MORE STORM
REPORTS WILL GO OUT AS WE GET TIME.

FCST...FLOYD NOW IN MASS. WINDS ARE STILL GUSTING TO T.S. FORCE AND
SOME LIGHT RAIN IN THE WRAPPING AROUND IN THE STRATUS FIELD AS FAR
SOUTH AS SOUTHERN NJ.

ALL THREE NCEP PRODUCTION MODELS LOOK TO BE IN GOOD AGREEMENT OVER
THE EAST WITH THE ZONAL FLOW BY 48 HOURS. HIGH PRESSURE TAKES
CONTROL OF THE WEATHER FOR THE WEEKEND.

SHORT TERM...WINDS WILL STAY UP TODAY DESPITE FLOYD MOVING AWAY. THE
GRADIENT STAYS TIGHT INTO THE AFTERNOON. THE LOW LEVEL LAPSE RATE
WILL ALLOW FOR MIXING DOWN OF THE 35 TO 40 KT WINDS. THE MOS AND
LAMP WINDS LOOK JUST A BIT OVER DONE. THEY DON/T SEEM TO BE ABLE TO
HANDLE THE TROPICAL SYSTEM TOO WELL. WOULD EXPECT GUSTS TO NEAR 45
MPH.

AGAIN...WITH THE SATURATED GROUND...THESE TYPES OF WINDS HAVE A GOOD
POTENTIAL TO DOWN LARGE TREES.

EXPECT THE LIGHT RAIN TO END EARLY. GOOD AMOUNT OF STRATUS HANGS IN
THROUGH THE DAY. WILL STAY CLOSE TO THE MOS TEMPS.

FLOODING...WILL KEEP WARNING UNTIL AT LEAST 8 AM AND THEN REVIEW THE
SITUATION WITH LOCAL OFFICIALS.

LONGER TERM...FAIR.

MARINE...SEAS WILL SLOWLY SUBSIDE TODAY. BASED ON THE NAVY
WAM...EXPECT TO DROP DOWN TO 6 FT OR LESS BY SATURDAY MORNING.
THUS...WILL RUN A HEAVY SURF ADVISORY THROUGH FRIDAY NIGHT. AMBROSE
AND 44025 STILL AT OR NEAR T.S. STRENGTH. WILL GO WITH A MINIMUM
GALE WARNING ALL COASTAL WATERS AS THERE WILL BE FREQUENT GUSTS TO
GALE FORCE. LAPSE RATES INDICATE THAT LOW LEVEL INSTABILITY OVER THE
STILL 70 DEGREE WATER WILL ALLOW FOR WINDS WILL GUST TO 40 TO 45.

COORDINATED WITH ALB...BOS...PHL AND BGM.  THANKS.

.NYC/OKX...WIND ADVISORY ALL ZONES TIL 6 PM.
           HEAVY SURF ADVISORY THROUGH FRIDAY NIGHT.
           GALE WARNING...ANZ355-353-350-335-330-338.
           FLOOD WARNING...
            NYC067>071-NJZ002>006-011-CTZ005-006-009-010.

TONGUE

In the hours before

Local storm report, Sep 17, 2:17 AM EDT, 5 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
217 AM EDT FRI SEP 17 1999

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0212 AM    SHELTON                   CT   FLOODING
09/17/99   FAIRFIELD                      EVACUATIONS OF THE MAPLES
                                          HOUSING SUBDIVISION ON THE
                                          HOUSATONIC ARE ONGOING

0214 AM    DANBURY                   CT   FLOODING
09/17/99   FAIRFIELD                      CITY OF DANBURY REPORTS
                                          HEAVY DAMAGE WITH 300-400
                                          HOMES...A CAR DEALER AND
                                          APARTMENT BUILDINGS
                                          FLOODED. ROADS ALSO
                                          FLOODED.

Special weather statement, Sep 17, 5:08 AM EDT, 2 hours 41 minutes before

NYZ074>077-080-081-181000-

SPECIAL WEATHER STATEMENT...HEAVY SURF ADVISORY
NATIONAL WEATHER SERVICE NEW YORK NY
508 AM EDT WED SEP 15 1999

...THE NATIONAL WEATHER SERVICE HAS ISSUED A HEAVY SURF ADVISORY FOR
OCEAN FACING SHORES THROUGH TONIGHT...

SEAS REMAIN VERY ROUGH FOLLOWING THE PASSAGE OF ONCE HURRICANE
FLOYD. WINDS ON THE BACKSIDE OF LOW PRESSURE OVER NEW ENGLAND THAT
WAS ONCE FLOYD WILL GUST TO GALE FORCE TODAY. WAVES FROM MORICHES
INLET EAST TO MONTAUK POINT AS HIGH AS 15 FOOT MAY BE SEEN THIS
MORNING. TO THE WEST...WAVES OF 8 TO 12 FEET WILL OCCUR. WAVES WILL
SLOWLY SUBSIDE TO 6 FEET OF LESS BY SATURDAY MORNING.

HEAVY SURF BRINGS THE DANGER OF RIP TIDES...BEACH EROSION AND
WASH-OVERS. PLEASURE BOATERS AND SMALL CRAFT SHOULD STAY IN PORT.
INLETS SUCH AS JONES...FIRE ISLAND...SHINNECOCK AND MORICHES WILL
EXTRA ROUGH.

ANYONE GOING TO THE BEACH ON THIS WINDY DAY SHOULD NOT ATTEMPT TO
ENTER THE WATER.

L
TONGUE
WFO BROOKHAVEN/NEW YORK CITY NY

The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 17, 1:38 AM EDT	Flash Flood Warning	OKX	Orange, Putnam, Rockland, Westchester	6 hr
Sep 17, 7:49 AM EDT	Flash Flood Warning	OKX	Rockland, Westchester	7 hr
Sep 17, 3:52 PM EDT	Flash Flood Warning	OKX	Rockland, Westchester	5 hr

Nearby

Flash Flood Warnings in New York, 1999 Every flash flood warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.