Alert archive / Vermont / Flash Flood Warnings in 2011

Flash Flood Warning 10, NWS Burlington, VT

May 26, 201110 counties in Vermont

NWS Burlington, VT issued this flash flood warning at May 26, 2011, 8:29 PM EDT for 10 counties in Vermont. It was in force for 3 hr. 7 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 26, 2011, 8:29 PM EDT (00:29 UTC)
Expired: May 26, 2011, 11:30 PM EDT
In force: 3 hr
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Flood severity: None

Counties Addison County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 99 km from the middle of the area, began a volume at 00:29 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.

What was reported inside it

Time	Report	Where	Remark
May 26, 9:30 PM EDT	FLASH FLOOD	Barre, VT	STATE HIGHWAY 14 NEAR PINE STREET WASHED OUT
May 26, 9:37 PM EDT	FLASH FLOOD	Passumpsic, VT	4 TO 5 INCHES OF WATER ON ROUTE 5.
May 26, 9:38 PM EDT	FLASH FLOOD	Barre, VT	SEVERAL FEET OF WATER ON MAIN STREET.
May 26, 11:00 PM EDT	FLASH FLOOD	1 Sw East St. Johnsbury, VT	FLASH FLOODING ON ROUTE 2 BETWEEN FAIRBANKS SCALE AND ROUTE 18. LOTS OF MUD... ROCKS AND FLOWING WATER ON ROADS.
May 26, 11:12 PM EDT	FLASH FLOOD	2 Wnw Barre, VT	WIDESPREAD FLOODING IMPACTING BUSINESSES AND ROADS WASHED OUT.
May 26, 11:13 PM EDT	FLASH FLOOD	2 Wnw Montpelier, VT	WIDESPREAD FLASH FLOODING.
May 26, 11:15 PM EDT	FLASH FLOOD	3 E Middlesex, VT	WATER FLOWING FROM ELEVATED ROADS HILLS FLOWING ONTO ROUTE 2 BETWEEN MIDDLESEX AND MONTPELIER

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Gray, ME (KGYX), launched 00:00Z, 0.5 hours before the alert went out and 145 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: 800 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 269 m²/s²
0-3 km storm-relative helicity: 276 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.

474 
WGUS51 KBTV 270029
FFWBTV
VTC001-005-007-009-015-017-019-021-023-027-270330-
/O.NEW.KBTV.FF.W.0010.110527T0029Z-110527T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
829 PM EDT THU MAY 26 2011

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL ADDISON COUNTY IN CENTRAL VERMONT
  NORTHERN ORANGE COUNTY IN CENTRAL VERMONT
  WASHINGTON COUNTY IN CENTRAL VERMONT
  CALEDONIA COUNTY IN NORTHEAST VERMONT
  SOUTHERN ESSEX COUNTY IN NORTHEAST VERMONT
  SOUTHEASTERN ORLEANS COUNTY IN NORTHEAST VERMONT
  EXTREME SOUTHEASTERN CHITTENDEN COUNTY IN NORTHWEST VERMONT
  EXTREME SOUTHEASTERN LAMOILLE COUNTY IN NORTHWEST VERMONT
  EXTREME NORTHEASTERN RUTLAND COUNTY IN SOUTHERN VERMONT
  NORTHWESTERN WINDSOR COUNTY IN SOUTHERN VERMONT

* UNTIL 1130 PM EDT

* AT 824 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WORCESTER...WEST BURKE...WALDEN...VICTORY...STANNARD...ST.
  JOHNSBURY...SHEFFIELD...PLAINFIELD...PEACHAM...PASSUMPSIC...
  MORETOWN...MONTPELIER...MARSHFIELD...MAIDSTONE...LYNDONVILLE...
  LUNENBURG...LOWER WATERFORD...HARDWICK...GREENSBORO...GRANBY...EAST
  HAVEN...DANVILLE...CONCORD...CALAIS...CABOT...BARNET...WEST
  DANVILLE...RICKER STATE PARK...NORTH DANVILLE...GILMAN...EAST
  MONTPELIER...EAST HARDWICK...SUTTON...MAIDSTONE STATE PARK...
  FAYSTON...EAST BURKE AND MIDDLESEX

IF YOU ENCOUNTER FLOODING...SEEK HIGHER GROUND IMMEDIATELY. WHEN YOU
CAN DO SO SAFELY PLEASE REPORT ANY FLOODING TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1 800 8 6 3 4 2 7 9...OR BY SUBMITTING
A STORM REPORT AT WEATHER.GOV/BURLINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

&&

LAT...LON 4479 7156 4475 7162 4458 7153 4456 7159
      4450 7157 4444 7165 4439 7179 4435 7181
      4433 7187 4434 7191 4431 7203 4428 7206
      4415 7204 4397 7247 4382 7291 4418 7297
      4472 7206 4491 7150

$$

NEILES

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:13 PM EDT	Tornado Warning	BTV	Caledonia, Essex, Orange, Washington	47 min
May 26, 8:19 PM EDT	Flash Flood Warning	BTV	Addison, Chittenden	3 hr
May 26, 8:23 PM EDT	Severe Thunderstorm Warning	BTV	Orange, Washington	36 min
May 26, 8:44 PM EDT	Flash Flood Warning	BTV	Addison, Rutland	6 hr
May 26, 9:03 PM EDT	Special Weather Statement	BTV	Caledonia	42 min
May 26, 10:15 PM EDT	Special Weather Statement	BTV	Essex	30 min
May 26, 10:28 PM EDT	Flash Flood Warning	BTV	Addison, Caledonia, Chittenden, Essex, Franklin, Grand Isle and 6 more	6 hr
May 26, 11:59 PM EDT	River Flood Warning	BTV	Washington	13 hr
May 26, 11:59 PM EDT	River Flood Warning	BTV	Chittenden	39 hr
May 27, 12:16 AM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	43 min
May 27, 1:01 AM EDT	River Flood Warning	BTV	Caledonia	42 hr
May 27, 4:07 AM EDT	Flash Flood Warning	BTV	Caledonia, Essex, Lamoille, Orange, Orleans, Washington	3 hr
May 27, 5:02 PM EDT	Severe Thunderstorm Warning	BTV	Addison	58 min
May 27, 5:11 PM EDT	Severe Thunderstorm Warning	BTV	Orange, Rutland, Windsor	64 min
May 27, 5:38 PM EDT	Special Weather Statement	BTV	Caledonia	37 min
May 27, 5:47 PM EDT	Severe Thunderstorm Warning	BTV	Addison	58 min
May 27, 6:32 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex	28 min
May 27, 6:35 PM EDT	Flash Flood Warning	BTV	Addison, Chittenden, Lamoille, Washington	4 hr
May 27, 6:35 PM EDT	Special Weather Statement	BTV	Washington	25 min
May 27, 6:42 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Lamoille, Orange, Orleans, Washington	63 min
May 27, 6:46 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex, Lamoille, Orleans, Washington	59 min
May 27, 6:49 PM EDT	Special Weather Statement	BTV	Addison	26 min
May 27, 6:52 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	40 min
May 27, 7:05 PM EDT	Flash Flood Warning	BTV	Caledonia, Essex, Franklin, Lamoille, Orange, Orleans and 1 more	3 hr
May 27, 7:27 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex, Orange, Washington	63 min
May 27, 7:30 PM EDT	Special Weather Statement	BTV	Addison	30 min
May 27, 7:31 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex	34 min

Nearby

Flash Flood Warnings in Vermont, 2011 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.