Alert archive / Vermont / Flash Flood Warnings in 2017

Flash Flood Warning 13, NWS Burlington, VT

July 17, 2017Rutland County, Windsor County, Vermont

NWS Burlington, VT issued this flash flood warning at Jul 17, 2017, 5:29 PM EDT for Rutland County, Windsor County, Vermont. It was in force for 3 hr. 2 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: Jul 17, 2017, 5:29 PM EDT (21:29 UTC)
Expired: Jul 17, 2017, 8:30 PM EDT
In force: 3 hr
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Flood severity: None

Counties Rutland County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 131 km from the middle of the area, began a volume at 21:31 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
Jul 17, 5:40 PM EDT	FLASH FLOOD	2 Nw Ludlow, VT	SEVERAL BUILDINGS FLOODED AT OKEMO RESORT BASE AREA.
Jul 17, 6:00 PM EDT	HEAVY RAIN 1.89	3 S Ludlow, VT	1 HOUR TOTAL

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

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.5 hours before the alert went out and 114 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: 171 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1038 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

342 
WGUS51 KBTV 172129
FFWBTV
VTC021-027-180030-
/O.NEW.KBTV.FF.W.0013.170717T2129Z-170718T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Burlington VT
529 PM EDT MON JUL 17 2017

The National Weather Service in Burlington has issued a

* Flash Flood Warning for...
  Southeastern Rutland County in southern Vermont...
  Southwestern Windsor County in southern Vermont...

* Until 830 PM EDT

* At 529 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Andover, Weston, Ludlow Village, Mount Holly, Ludlow, Cavendish,
  Belmont and Russellville.

LAT...LON 4332 7288 4348 7279 4344 7261 4326 7273

$$

Lahiff

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 8:11 PM EDT	Special Weather Statement	BTV	Addison	64 min
Jul 16, 8:30 PM EDT	Flash Flood Warning	BTV	Addison	2 hr
Jul 17, 11:04 AM EDT	Special Weather Statement	BTV	Lamoille	56 min
Jul 17, 1:10 PM EDT	Special Weather Statement	BTV	Addison, Chittenden, Franklin	65 min
Jul 17, 2:02 PM EDT	Flash Flood Warning	BTV	Lamoille, Washington	6 hr
Jul 17, 2:09 PM EDT	Special Weather Statement	BTV	Caledonia, Essex, Lamoille, Orange, Orleans, Washington	66 min
Jul 17, 2:10 PM EDT	Special Weather Statement	BTV	Windsor	35 min
Jul 17, 2:16 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	59 min
Jul 17, 3:12 PM EDT	Special Weather Statement	BTV	Caledonia, Orange	63 min
Jul 17, 5:04 PM EDT	Special Weather Statement	BTV	Windsor	56 min
Jul 17, 5:18 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	57 min
Jul 17, 6:13 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	62 min

Nearby

Flash Flood Warnings in Vermont, 2017 Every flash flood warning in 2017

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.