Alert archive / New York / Flash Flood Warnings in 1999

Flash Flood Warning 21, NWS Albany, NY

September 16, 1999Berkshire County, Massachusetts; Albany County, Rensselaer County, New York

NWS Albany, NY issued this flash flood warning at Sep 16, 1999, 5:49 PM EDT for Berkshire County, Massachusetts; Albany County, Rensselaer County, New York. It was in force for 10 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 16, 1999, 5:49 PM EDT (21:49 UTC)
Expired
Sep 17, 1999, 4:00 AM EDT
In force
10 hr
Issued by
NWS Albany, NY
Area
Whole counties

Counties Berkshire County, MA, Albany County, NY, Rensselaer County, NY

The radar

The Albany radar (KENX), 41 km from the middle of the area, began a volume at 21:48 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.8 hours before the alert went out and 26 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 1999-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 1999-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
590 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
225 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 KALB 162149
FFWALB
CTC005-MAC003-NYC001-083-170755-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE ALBANY NY
549 PM EDT THU SEP 16 1999

...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WARNING FOR
ALBANY...RENSSELAER...LITCHFIELD AND BERKSHIRE COUNTIES UNTIL 4 AM
EDT FRIDAY...

NATIONAL WEATHER SERVICE DOPPLER RADAR AND SPOTTER REPORTS INDICATE
THAT 3 TO 5 INCHES OF RAIN HAS ALREADY FALLEN ACROSS THE REGION.
TROPICAL MOISTURE WILL CONTINUE TO STREAM INTO THE AREA THROUGH
THE EVENING HOURS AS THE RESULT OF FLOYD.

AREA STREAMS AND CREEKS ARE LIKELY TO OVERFLOW THEIR BANKS AND
LOCALIZED FLOODING ALONG ROADWAYS DUE TO PONDING OF WATER IS
ALSO LIKELY.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING. IT IS VERY DIFFICULT
AT NIGHT TO TELL HOW MUCH WATER IS ON ROADS. MOTORISTS SHOULD NOT
DRIVE THROUGH WATER OF UNKNOWN DEPTH.


...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WARNING FOR
ALBANY...RENSSELAER...LITCHFIELD AND BERKSHIRE COUNTIES UNTIL 4 AM
EDT FRIDAY...

NATIONAL WEATHER SERVICE DOPPLER RADAR AND SPOTTER REPORTS INDICATE
THAT 3 TO 5 INCHES OF RAIN HAS ALREADY FALLEN ACROSS THE REGION.
TROPICAL MOISTURE WILL CONTINUE TO STREAM INTO THE AREA THROUGH
THE EVENING HOURS AS THE RESULT OF FLOYD.

AREA STREAMS AND CREEKS ARE LIKELY TO OVERFLOW THEIR BANKS AND
LOCALIZED FLOODING ALONG ROADWAYS DUE TO PONDING OF WATER IS
ALSO LIKELY.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING. IT IS VERY DIFFICULT
AT NIGHT TO TELL HOW MUCH WATER IS ON ROADS. MOTORISTS SHOULD NOT
DRIVE THROUGH WATER OzF UNKNOWN DEPTH.

MAC

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 16, 3:59 PM EDTFlash Flood WarningALYGreene12 hr
Sep 16, 4:25 PM EDTFlash Flood WarningALYColumbia, Dutchess, Ulster11 hr
Sep 16, 5:40 PM EDTFlash Flood WarningALYUlster10 hr

Nearby

Flash Flood Warnings in New York, 1999Flash Flood Warnings in Massachusetts, 1999Every 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; radar from the NEXRAD Level II archive.