Headwater Guidance
Issued by NWS Northeast RFC

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370
FOUS71 KTAR 052013
FFHTAR
HEADWATER FLASH FLOOD GUIDANCE
NATIONAL WEATHER SERVICE
NORTHEAST RIVER FORECAST CENTER... NORTON MA
ISSUED BY NATIONAL WEATHER SERVICE NATIONAL WATER CENTER... TUSCALOOSA AL
411 PM EDT THU JUN 5 2025

: WATERSHED AREA AVERAGE RAINFALL IN INCHES REQUIRED
: TO EXCEED FLOOD STAGE
: HSA - HYDROLOGIC SERVICE AREA
.B TAR 250605 Z DH18/DC2506052011 /DUE/PPHCF/PPTCF/PPQCF/PPKCF/PPDCF
:
:===========================================================
:      CARIBOU HSA
:IDENT    1HR   3HR   6HR  12HR  24HR  HEADWATER NAME
:======= ====  ====  ====  ====  ====  ====================
MASM1     3.0/  4.0/  4.4/  4.7/  5.3 :MASARDIS, ME
DOVM1     2.8/  3.0/  3.1/  3.6/  3.8 :DOVER, ME
WENM1     3.0/  4.5/  6.0/  6.8/  8.0 :WEST ENFIELD, ME
:===========================================================
:      GRAY HSA
:IDENT    1HR   3HR   6HR  12HR  24HR  HEADWATER NAME
:======= ====  ====  ====  ====  ====  ====================
NANM1     3.0/  3.2/  3.4/  4.4/  4.8 :NORTH ANSON, ME
SKOM1     2.7/  3.7/  4.2/  4.8/  6.0 :SKOWHEGAN, ME
ROXM1     1.6/  1.8/  1.9/  2.4/  3.4 :ROXBURY, ME
CNWN3     2.5/  2.6/  2.7/  3.2/  3.6 :CONWAY, NH
WOON3     1.6/  1.6/  1.7/  2.1/  2.9 :WOODSTOCK, NH
RUMN3     3.0/  3.1/  3.3/  3.6/  4.4 :RUMNEY, NH
BRSN3     3.0/  3.2/  3.3/  3.5/  3.7 :BRISTOL, NH
DAVN3     2.9/  3.1/  3.3/  4.1/  4.8 :DAVISVILLE, NH
NSTN3     2.8/  3.4/  3.7/  4.0/  4.5 :N STRATFORD, NH
BETN3     2.4/  2.4/  2.5/  2.9/  3.8 :BETHLEHEM JCT, NH
PTRN3     3.0/  3.4/  3.4/  3.9/  4.4 :PETERBORO, NH
GFFN3     2.6/  2.7/  2.9/  3.3/  4.3 :GOFFSTOWN, NH
:===========================================================
:      BOSTON HSA
:IDENT    1HR   3HR   6HR  12HR  24HR  HEADWATER NAME
:======= ====  ====  ====  ====  ====  ====================
FBGM3     2.6/  2.7/  2.7/  3.4/  4.5 :FITCHBURG, MA
WGTM3     2.6/  2.7/  2.9/  3.7/  5.5 :WEST GROTON, MA
MAYM3     2.4/  2.5/  2.7/  4.6/  5.9 :MAYNARD, MA
SAXM3     1.8/  2.9/  3.7/  4.5/  5.9 :SAXONVILLE, MA
WLMM3     3.0/  3.5/  3.6/  4.7/  7.1 :WILMINGTON, MA
NRWM3     2.7/  4.5/  5.3/  7.0/  8.0 :NORWOOD, MA
DOVM3     3.0/  4.2/  4.2/  4.6/  5.3 :DOVER, MA
NBRM3     3.0/  3.3/  3.6/  4.5/  6.6 :NORTHBRIDGE, MA
WLMC3     3.0/  4.5/  5.3/  5.6/  6.5 :WILLIMANTIC, CT
WSFM3     3.0/  3.7/  4.1/  4.7/  5.7 :WESTFIELD, MA
UNVC3     2.1/  2.3/  3.0/  4.7/  6.8 :UNIONVILLE, CT
:===========================================================
:      NEW YORK HSA
:IDENT    1HR   3HR   6HR  12HR  24HR  HEADWATER NAME
:======= ====  ====  ====  ====  ====  ====================
GRDN6     3.0/  3.5/  3.6/  3.7/  3.9 :GARDINER, NY
YTCC3     2.2/  3.0/  3.3/  3.7/  4.5 :YANTIC, CT
:===========================================================
:      BURLINGTON HSA
:IDENT    1HR   3HR   6HR  12HR  24HR  HEADWATER NAME
:======= ====  ====  ====  ====  ====  ====================
CZRN6     3.0/  3.4/  3.6/  4.8/  6.0 :PERRY MILLS, NY
ASFN6     1.5/  1.5/  1.6/  2.0/  2.3 :AUSABLE FORKS, NY
CENV1     2.5/  2.6/  2.6/  2.6/  2.7 :CENTER RUTLAND, VT
MONV1     2.0/  2.2/  2.7/  3.3/  4.5 :MONTPELIER, VT
MOOV1     1.6/  1.6/  1.8/  2.0/  2.8 :MORETOWN, VT
JONV1     2.3/  2.4/  2.5/  2.7/  3.1 :JOHNSON, VT
NTYV1     1.5/  1.7/  2.1/  3.0/  3.8 :NORTH TROY, VT
PASV1     2.8/  3.3/  3.6/  3.9/  4.6 :PASSUMPSIC, VT
WLRV1     2.3/  2.3/  2.3/  2.6/  3.3 :WELLS RIVER, VT
WEHV1     2.0/  2.4/  2.6/  2.7/  3.0 :W HARTFORD, VT
:===========================================================
:      ALBANY HSA
:IDENT    1HR   3HR   6HR  12HR  24HR  HEADWATER NAME
:======= ====  ====  ====  ====  ====  ====================
NWCN6     3.0/  4.5/  5.3/  5.7/  6.5 :NEWCOMB, NY
HOPN6     2.7/  2.8/  3.1/  3.3/  4.0 :HOPE, NY
GVVN6     2.2/  2.3/  2.4/  2.5/  3.2 :MID. GRANVILLE, NY
BTTN6     2.4/  3.0/  3.3/  3.7/  4.3 :BATTENVILLE, NY
WILM3     1.8/  2.1/  2.4/  2.9/  3.7 :WILLIAMSTOWN, MA
BNTV1     2.0/  2.1/  2.2/  2.5/  2.8 :N. BENNINGTON, VT
LTLN6     2.5/  3.5/  3.9/  4.2/  5.0 :LITTLE FALLS, NY
PTVN6     2.4/  2.6/  2.8/  3.2/  4.6 :PRATTSVILLE, NY
MTRN6     2.4/  2.6/  2.9/  3.3/  4.6 :COLD BROOK, NY
ROSN6     2.1/  3.0/  3.5/  3.9/  4.8 :ROSENDALE, NY
WAPN6     2.1/  2.7/  3.2/  3.8/  4.9 :WAPPINGER FALLS, NY
GTBM3     3.0/  4.5/  5.4/  6.0/  7.1 :GT. BARRINGTON, MA
TENN6     3.0/  4.5/  5.0/  5.6/  6.6 :GAYLORDSVILLE, CT
GAYC3     2.5/  2.8/  2.9/  3.2/  3.6 :GAYLORDSVILLE, CT
:===========================================================
:      BINGHAMTON HSA
:IDENT    1HR   3HR   6HR  12HR  24HR  HEADWATER NAME
:======= ====  ====  ====  ====  ====  ====================
FLLN6     2.3/  2.5/  2.8/  3.3/  4.0 :ITHACA, NY
ONDN6     2.0/  2.1/  2.3/  3.3/  4.0 :SYRACUSE, NY
NEIN6     1.8/  2.1/  2.3/  2.6/  3.2 :ONEIDA, NY
:===========================================================
:      BUFFALO HSA
:IDENT    1HR   3HR   6HR  12HR  24HR  HEADWATER NAME
:======= ====  ====  ====  ====  ====  ====================
GOWN6     1.9/  2.3/  2.4/  2.7/  3.0 :GOWANDA, NY
GDVN6     1.6/  1.8/  2.0/  2.4/  3.0 :GARDENVILLE, NY
LCSN6     1.4/  1.6/  1.9/  2.2/  2.9 :LANCASTER, NY
EBZN6     1.4/  1.7/  1.8/  2.1/  2.6 :EBENEZER, NY
WILN6     2.0/  2.1/  2.1/  2.4/  2.6 :WILLIAMSVILLE, NY
BTVN6     2.6/  2.7/  2.9/  3.3/  3.7 :BATAVIA, NY
WLLN6     1.8/  2.0/  2.2/  2.3/  2.6 :WELLSVILLE, NY
GRBN6     2.4/  2.7/  3.0/  3.4/  4.1 :GARBUTT, NY
CHRN6     2.8/  3.1/  3.2/  3.4/  3.8 :CHURCHVILLE, NY
BOON6     3.0/  3.2/  3.4/  3.8/  4.8 :BOONVILLE, NY
.END
$$

NYC WATER SUPPLY FORECAST
ESTIMATED RUNOFF IN MILLIONS OF GALLONS RESULTING FROM THE
FOLLOWING 6-HOUR PRECIPITATION AMOUNTS IN INCHES
:
Drainage areas in square miles are:
GILBOA - 315.      ASHOKAN - 257.     RONDOUT - 95.
W.BRANCH - 43.     CROTON - 335.      KENSICO - 13.
:
.B TAR 250605 Z DH18/DC2506052013 /DUE/QMXC1/QMXC2/QMXC3/QMXC4
.B1 /QMXC5/QMXC6
:
:                 RAINFALL
:IDENT    0.5    1.0    1.5    2.0     3.0     5.0   LOCATION
:======= ===== ====== ====== ====== ======= =======  ================
RONDOUT   114/   387/   677/   969/  2417/  5686/ : RONDOUT RESERVOIR
CROTON    265/   746/  1432/  2151/  3705/ 13450/ : NEW CROTON DAM
W.BRANC    29/    65/   116/   174/   302/  1168/ : W.BRANCH RESERVOIR
KENSICO    23/    51/   155/   266/   491/   941/ : KENSICO
GILBOA    383/  1208/  2253/  4192/  9415/ 20170/ : SCHOHARIE RESERVOIR
ASHOKAN   665/  1558/  2645/  3773/  9109/ 21973/ : ASHOKAN RESERVOIR
.END
$$