Alert archive / Vermont / Flash Flood Watches in 2011

Flash Flood Watch 3, NWS Burlington, VT

May 28, 201110 counties in Vermont; 4 counties in New York

NWS Burlington, VT issued this flash flood watch at May 28, 2011, 4:14 AM EDT for 10 counties in Vermont; 4 counties in New York. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued
May 28, 2011, 4:14 AM EDT (08:14 UTC)
Expired
May 28, 2011, 9:51 PM EDT
In force
18 hr
Issued by
NWS Burlington, VT

Counties Clinton County, NY, Essex County, NY, Franklin County, NY, St. Lawrence County, NY, Addison County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Washington County, VT

The radar

The Burlington radar (KCXX), 8 km from the middle of the area, began a volume at 08:15 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 00:00Z, 8.2 hours before the alert went out and 210 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 00:00Z on 2011-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 771 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2011-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.193958Sfc1 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
771 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1872 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Burlington, VT wrote its last area forecast discussion before this flash flood watch went out at May 28, 3:12 AM EDT, 1 hour 2 minutes earlier.

Area forecast discussion, May 28, 3:12 AM EDT, 1 hour 2 minutes before
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Hazardous weather outlook, May 27, 10:31 PM EDT, 5 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE BURLINGTON VT
1031 PM EDT FRI MAY 27 2011

NYZ028>031-034-035-VTZ001>012-016>019-290245-
EASTERN CLINTON-SOUTHEASTERN ST. LAWRENCE-SOUTHERN FRANKLIN-
WESTERN CLINTON-WESTERN ESSEX-EASTERN ESSEX-GRAND ISLE-
WESTERN FRANKLIN-ORLEANS-ESSEX-WESTERN CHITTENDEN-LAMOILLE-CALEDONIA-
WASHINGTON-WESTERN ADDISON-ORANGE-WESTERN RUTLAND-WINDSOR-
EASTERN FRANKLIN-EASTERN CHITTENDEN-EASTERN ADDISON-EASTERN RUTLAND-
1031 PM EDT FRI MAY 27 2011

...FLASH FLOOD WATCH IN EFFECT UNTIL 4 AM EDT SATURDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL
VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN
VERMONT.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THE THREAT FOR ADDITIONAL SHOWERS AND THUNDERSTORMS WILL EXIST
ACROSS THE NORTH COUNTRY SATURDAY AND SUNDAY...AND AGAIN ON TUESDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

NYZ026-027-087-290245-
NORTHERN ST. LAWRENCE-NORTHERN FRANKLIN-SOUTHWESTERN ST. LAWRENCE-
1031 PM EDT FRI MAY 27 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK.

.DAY ONE...TONIGHT.

MORE SHOWERS AND POSSIBLY A THUNDERSTORM OVERNIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THE THREAT FOR ADDITIONAL SHOWERS AND THUNDERSTORMS WILL EXIST
ACROSS THE NORTH COUNTRY SATURDAY AND SUNDAY...AND AGAIN ON TUESDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, May 27, 10:16 PM EDT, 5 hours 58 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BURLINGTON VT
1016 PM EDT FRI MAY 27 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0444 PM     TSTM WND DMG     NEWCOMB                 43.97N  74.17W
05/27/2011                   ESSEX              NY   AMATEUR RADIO

            ESSEX CTY DISPATCH REPORTED NUMEROUS TREES AND
            POWERLINES DOWN

0500 PM     FLASH FLOOD      LAKE PLACID             44.28N  73.98W
05/27/2011                   ESSEX              NY   PUBLIC

            WATER OVER ROAD AT RTE 73 IN LAKE PLACID

0500 PM     FLASH FLOOD      WILMINGTON              44.39N  73.82W
05/27/2011                   ESSEX              NY   PUBLIC

            WATER OVER ROAD ALONG RTE 83

0515 PM     HAIL             LUDLOW                  43.40N  72.70W
05/27/2011  E0.38 INCH       WINDSOR            VT   PUBLIC

            ONE-FOURTH TO THREE-EIGHTHS INCH DIAMETER HAIL

0516 PM     HAIL             LUDLOW                  43.40N  72.70W
05/27/2011  E1.00 INCH       WINDSOR            VT   PUBLIC

            QUARTER SIZE HAIL

0531 PM     HAIL             BRIDGEWATER             43.59N  72.63W
05/27/2011  E0.50 INCH       WINDSOR            VT   PUBLIC

            HALF-INCH DIAMETER HAIL

0538 PM     HAIL             CABOT                   44.41N  72.31W
05/27/2011  E0.75 INCH       WASHINGTON         VT   PUBLIC

            DIME SIZE HAIL

0610 PM     HAIL             TICONDEROGA             43.85N  73.42W
05/27/2011  E0.75 INCH       ESSEX              NY   EMERGENCY MNGR

            DIME SIZE HAIL

0610 PM     HAIL             TICONDEROGA             43.85N  73.42W
05/27/2011  E0.25 INCH       ESSEX              NY   AMATEUR RADIO

            HAM RADIO... ONE-QUARTER INCH HAIL

0627 PM     HAIL             SHOREHAM                43.89N  73.32W
05/27/2011  E0.50 INCH       ADDISON            VT   PUBLIC

            HALF-INCH HAIL

0630 PM     HAIL             SHOREHAM                43.89N  73.32W
05/27/2011  E1.00 INCH       ADDISON            VT   PUBLIC

            QUARTER SIZE HAIL

0635 PM     HAIL             CORNWALL                43.96N  73.21W
05/27/2011  E0.25 INCH       ADDISON            VT   PUBLIC

            PEA SIZE HAIL

0638 PM     HAIL             WATERBURY CENTER        44.38N  72.72W
05/27/2011  E1.00 INCH       WASHINGTON         VT   PUBLIC

            QUARTER SIZE HAIL

0645 PM     HAIL             MONTPELIER              44.27N  72.57W
05/27/2011  E0.25 INCH       WASHINGTON         VT   PUBLIC

            PEA SIZE HAIL

0650 PM     HAIL             LUNENBURG               44.46N  71.68W
05/27/2011  M1.75 INCH       ESSEX              VT   PUBLIC

            GOLF-BALL SIZE HAIL

0651 PM     TSTM WND DMG     EDEN                    44.71N  72.55W
05/27/2011                   LAMOILLE           VT   PUBLIC

            TREES DOWN ON POWERLINES

0653 PM     HAIL             WORCESTER               44.37N  72.55W
05/27/2011  E0.75 INCH       WASHINGTON         VT   PUBLIC

            PENNY SIZE HAIL

0654 PM     HAIL             QUECHEE                 43.65N  72.42W
05/27/2011  M1.00 INCH       WINDSOR            VT   PUBLIC

            QUARTER SIZE HAIL

0655 PM     HAIL             BARRE                   44.20N  72.51W
05/27/2011  E0.25 INCH       WASHINGTON         VT   TRAINED SPOTTER

            PEA SIZE HAIL

0700 PM     FLASH FLOOD      WHITEFACE MOUNTAIN      44.37N  73.90W
05/27/2011                   ESSEX              NY   TRAINED SPOTTER

            CULVERTS OVERFLOW WITH WATER SCATTERING DEBRIS... 2000
            FT ELEV

0705 PM     HAIL             QUECHEE                 43.65N  72.42W
05/27/2011  E0.75 INCH       WINDSOR            VT   PUBLIC

            DIME SIZE HAIL

0706 PM     TSTM WND DMG     HARTFORD                43.66N  72.34W
05/27/2011                   WINDSOR            VT   LAW ENFORCEMENT

            TREES DOWN... TIME ESTIMATED

0720 PM     HAIL             IRASBURG                44.80N  72.28W
05/27/2011  E0.25 INCH       ORLEANS            VT   TRAINED SPOTTER

            PEA-SIZE HAIL... ALSO REPORTED STRONG WINDS

0722 PM     TSTM WND DMG     BARRE                   44.20N  72.51W
05/27/2011                   WASHINGTON         VT   PUBLIC

            TREES DOWN

0738 PM     HAIL             WEST TOPSHAM            44.12N  72.31W
05/27/2011  M0.50 INCH       ORANGE             VT   AMATEUR RADIO

            AMATEUR RADIO SPOTTER... HALF INCH HAIL

0740 PM     TSTM WND DMG     2 S LYNDONVILLE         44.50N  72.00W
05/27/2011                   CALEDONIA          VT   LAW ENFORCEMENT

            STATE POLICE... TREE DOWN ON RTE 122

0740 PM     HAIL             WAITS RIVER             44.09N  72.28W
05/27/2011  E1.00 INCH       ORANGE             VT   LAW ENFORCEMENT

            QUARTER SIZE HAIL

&&

EVENT NUMBER BTV1100212 BTV1100217 BTV1100218 BTV1100213 BTV1100214
BTV1100216 BTV1100215 BTV1100219 BTV1100221 BTV1100222 BTV1100220
BTV1100224 BTV1100223 BTV1100225 BTV1100230 BTV1100228 BTV1100226
BTV1100235 BTV1100227 BTV1100234 BTV1100232 BTV1100238 BTV1100229
BTV1100231 BTV1100233 BTV1100236 BTV1100237

LOCONTO
Special weather statement, May 27, 11:37 PM EDT, 4 hours 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
1137 PM EDT FRI MAY 27 2011

NYZ026-027-029>031-034-087-280500-
NORTHERN FRANKLIN NY-NORTHERN ST. LAWRENCE NY-
SOUTHEASTERN ST. LAWRENCE NY-SOUTHERN FRANKLIN NY-
SOUTHWESTERN ST. LAWRENCE NY-WESTERN CLINTON NY-WESTERN ESSEX NY-
1137 PM EDT FRI MAY 27 2011

...A LINE OF THUNDERSTORMS WITH HEAVY DOWNPOURS WILL AFFECT
FRANKLIN...NORTHWESTERN CLINTON...ST. LAWRENCE AND WEST CENTRAL
ESSEX COUNTIES IN NEW YORK THROUGH 2 AM...

AT 1130 PM EDT...A LINE OF THUNDERSTORMS WITH ASSOCIATED HEAVY
DOWNPOURS WAS LOCATED FROM 3 MILES NORTHWEST OF TALCVILLE TO 5 MILES
SOUTHEAST OF AXTON LANDING...MOVING NORTH AT 30 MPH.

VERY HEAVY RAIN WITH THESE STORMS WILL CAUSE WATER TO POND ON ROADS
AND IN POOR DRAINAGE AREAS. THERE MAY BE RAPID RISES ON SMALL
STREAMS AND CREEKS. DANGEROUS CLOUD TO GROUND LIGHTNING IS ALSO
EXPECTED.

A FLASH FLOOD WATCH REMAINS IN EFFECT ACROSS THE NORTHERN
ADIRONDACKS THROUGH 4 AM SATURDAY.

LOCATIONS TO BE AFFECTED INCLUDE BUT ARE NOT LIMITED TO...
RICHVILLE...NORTH GOUVERNEUR...DE KALB...EDWARDSVILLE...RENSSELAER
FALLS...HEUVELTON...OGDENSBURG...RAINBOW LAKE...LISBON...POTSDAM...
ST. REGIS FALLS...SANTA CLARA...

LAT...LON 4444 7581 4447 7582 4489 7521 4488 7518
      4493 7509 4501 7382 4407 7420 4408 7428
      4411 7429 4410 7442 4432 7570 4438 7581
      4442 7584

BANACOS
Special weather statement, May 28, 1:06 AM EDT, 3 hours 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
106 AM EDT SAT MAY 28 2011

NYZ034-035-280600-
EASTERN ESSEX NY-WESTERN ESSEX NY-
106 AM EDT SAT MAY 28 2011

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN ESSEX COUNTY IN NEW
YORK...

AT 101 AM EDT...A STRONG THUNDERSTORM WAS 6 MILES SOUTHWEST OF NORTH
CREEK...MOVING NORTHEAST AT 35 MPH.

THIS STORM WILL PRODUCE SMALL HAIL UP TO DIME SIZE. VERY HEAVY RAIN
WILL CAUSE WATER TO POND ON ROADS AND IN POOR DRAINAGE AREAS. THERE
MAY BE RAPID RISES ON SMALL STREAMS AND CREEKS. A FLASH FLOOD WATCH
CONTINUES THROUGH 4 AM.

LOCATIONS TO BE AFFECTED INCLUDE BUT ARE NOT LIMITED TO...
OLMSTEDVILLE...MINERVA...SOUTH SCHROON...EXIT 27 THROUGH EXIT 30 ON
I87...SCHROON FALLS...NORTH HUDSON...IRONVILLE...

LAT...LON 4375 7406 4379 7406 4380 7411 4381 7413
      4404 7399 4420 7359 4398 7342 4381 7341
      4380 7344 4374 7405

BANACOS
Local storm report, May 28, 2:22 AM EDT, 1 hour 52 minutes before
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Special weather statement, May 28, 3:36 AM EDT, 38 minutes before
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Local storm report, May 28, 4:09 AM EDT, 5 minutes before
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The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 28, 12:31 AM EDTAreal Flood WarningBTVCaledonia, Essex, Orleans6 hr
May 28, 3:36 AM EDTSpecial Weather StatementBTVCaledonia, Essex, Orange, Orleans54 min
May 28, 1:26 PM EDTSpecial Weather StatementBTVCaledonia, Essex, Lamoille, Orange, Orleans, Washington109 min
May 28, 1:38 PM EDTSevere Thunderstorm WarningBTVAddison, Orange, Rutland, Washington, Windsor67 min
May 28, 2:28 PM EDTSevere Thunderstorm WarningBTVAddison62 min
May 28, 4:36 PM EDTSpecial Weather StatementBTVWashington39 min
May 28, 5:14 PM EDTSpecial Weather StatementBTVCaledonia46 min
May 28, 5:28 PM EDTSpecial Weather StatementBTVAddison47 min
May 28, 6:02 PM EDTSpecial Weather StatementBTVWashington43 min
May 27, 9:41 PM EDTRiver Flood WarningBTVClinton, Essex16 hr
May 27, 11:37 PM EDTSpecial Weather StatementBTVFranklin, St. Lawrence83 min
May 28, 1:06 AM EDTSpecial Weather StatementBTVEssex54 min
May 28, 2:16 AM EDTFlash Flood WarningBTVClinton, Essex4 hr
May 28, 2:33 PM EDTSpecial Weather StatementBTVEssex57 min
May 28, 4:25 PM EDTSpecial Weather StatementBTVClinton, Essex50 min

Nearby

Flash Flood Watches in Vermont, 2011Flash Flood Watches in New York, 2011Every flash flood watch in 2011

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.