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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
946 AM EDT FRI MAR 13 2026
TO: SUBSCRIBERS:
-FAMILY OF SERVICES
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
OTHER NWS PARTNERS, USERS, AND EMPLOYEES
FROM: DAVID NICOSIA
METEOROLOGIST-IN-CHARGE
WEATHER FORECAST OFFICE, BINGHAMTON, NY
SUBJECT: CHANGES TO GAGE ZERO AND FLOOD CATEGORIES FOR THE RIVER
GAGE NEAR SOUTH ADDISON ON THE TUSCARORA CREEK (ADDN6)
EFFECTIVE ON MONDAY, APRIL 13, 2026, THE USGS WILL CHANGE THE
GAGE ZERO/GAGE DATUM ELEVATION FOR THE RIVER GAGE NEAR SOUTH
ADDISON ON THE TUSCARORA CREEK TO 1076.45 FEET ABOVE NORTH
AMERICAN VERTICAL DATUM (NAVD88). [THE EQUIVALENT ELEVATION IN THE
NATIONAL GEODETIC VERTICAL DATUM OF 1929 (NGVD 29) WILL BE
1076.95 FEET]. GAGE ZERO IS THE ELEVATION AT WHICH THE RIVER STAGE
IS LABELED AS ZERO FEET. THE CHANGE IS NECESSARY DUE TO SCOURING
OF THE CREEK BED DURING PAST FLOODS AND TO PREVENT OBSERVED STAGES
BELOW ZERO.
DUE TO THIS CHANGE IN RIVER DATUM, FLOOD CATEGORY STAGES CITED IN
NWS FORECAST PRODUCTS FOR THE TUSCARORA CREEK NEAR SOUTH ADDISON
WILL BE CHANGED AS FOLLOWS:
1. FLOOD STAGE WILL NOW BE 11.0 FEET ABOVE GAGE ZERO.
2. MODERATE FLOOD STAGE WILL BE 13.0 FEET ABOVE GAGE ZERO.
3. MAJOR FLOOD STAGE WILL BE 15.0 FEET ABOVE GAGE ZERO.
ANY KNOWN FLOOD IMPACTS REFERENCED TO THIS GAGE WILL REMAIN THE
SAME, BUT WILL BE REPRESENTED BY A DIFFERENT STAGE VALUE.
HISTORICAL RECORDS WILL ALSO BE ADJUSTED TO THE NEW DATUM.
THE NATIONAL WEATHER SERVICE WELCOMES PUBLIC FEEDBACK. IF YOU
HAVE ANY QUESTIONS OR COMMENTS ON THIS CHANGE, PLEASE CONTACT:
JIM BREWSTER, SENIOR SERVICE HYDROLOGIST
NATIONAL WEATHER SERVICE FORECAST OFFICE
32 DAWES DRIVE
JOHNSON CITY, NY 13790
PHONE: 607-770-9531, OPTION 7
E-MAIL: JAMES.BREWSTER@NOAA.GOV
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