Alert archive / Connecticut / Flash Flood Warnings in 2014

Flash Flood Warning 34, NWS Boston/Norton, MA

August 13, 2014Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this flash flood warning at Aug 13, 2014, 8:17 AM EDT for Northeastern Connecticut Planning Region, Connecticut. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 13, 2014, 8:17 AM EDT (12:17 UTC)
Expired
Aug 13, 2014, 12:15 PM EDT
In force
4 hr
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

County Northeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 84 km from the middle of the area, began a volume at 12:17 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

Brookhaven, NY (KOKX), launched 12:00Z, 0.3 hours before the alert went out and 116 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, Brookhaven, NY at 12:00Z on 2014-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2014-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 186 square meters per square second.19395878Sfc1 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
8 J/kg
Mixed-layer CIN
-129 J/kg
Mixed-layer LCL
473 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
186 m²/s²
0-3 km storm-relative helicity
534 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

441 
WGUS51 KBOX 131217
FFWBOX
CTC015-131615-
/O.NEW.KBOX.FF.W.0034.140813T1217Z-140813T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
817 AM EDT WED AUG 13 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WINDHAM COUNTY IN NORTHERN CONNECTICUT...

* UNTIL 1215 PM EDT

* AT 815 AM EDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE 
  WARNED AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN ACROSS 
  THE SOUTHERN PORTION OF THE COUNTY. FLASH FLOODING IS EXPECTED TO 
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MANSFIELD...WINDHAM...PLAINFIELD...WILLIMANTIC...KILLINGLY...
  PUTNAM...BROOKLYN...WILLINGTON...CANTERBURY...ASHFORD...POMFRET...
  STERLING...CHAPLIN...HAMPTON...EASTFORD AND SCOTLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING IS ISSUED FOR RAPID AND POTENTIALLY LIFE
THREATENING FLOODING. IN URBAN AREAS AVOID FLOODED ROADS AND OBEY
ROAD CLOSURES. THOSE NEAR SMALL STREAMS MUST HEAD FOR HIGHER GROUND
IMMEDIATELY.

&&

LAT...LON 4165 7204 4166 7213 4166 7216 4172 7225
      4173 7220 4174 7219 4175 7216 4183 7216
      4184 7222 4189 7222 4187 7180 4164 7179

$$

FRANK
2 follow-up statements
465 
WGUS71 KBOX 131304
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
904 AM EDT WED AUG 13 2014

CTC015-131615-
/O.CON.KBOX.FF.W.0034.000000T0000Z-140813T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINDHAM CT-
904 AM EDT WED AUG 13 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 PM EDT FOR
WINDHAM COUNTY...

AT 900 AM EDT...DOPPLER RADAR INDICATED HEAVY RAIN CONTINUED TO FALL 
ACROSS THE REGION.  THE AREA OF GREATEST CONCERN IS ACROSS SOUTHEAST 
WINDHAM COUNTY...WHERE DOPPLER RADAR INDICATES UP TO 3 INCHES OF 
RAIN HAS ALREADY FALLEN.  A WEATHER STATION IN CANTERBURY HAS 
RECEIVED 2.71 INCHES SO FAR.  

AN ADDITIONAL 1 TO 2 INCHES OF RAIN IS EXPECTED ACROSS THE REGION. 
FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING IS ISSUED FOR RAPID AND POTENTIALLY LIFE
THREATENING FLOODING. IN URBAN AREAS AVOID FLOODED ROADS AND OBEY
ROAD CLOSURES. THOSE NEAR SMALL STREAMS MUST HEAD FOR HIGHER GROUND
IMMEDIATELY.

&&

LAT...LON 4165 7204 4166 7213 4166 7216 4172 7225
      4173 7220 4174 7219 4175 7216 4183 7216
      4184 7222 4189 7222 4187 7180 4164 7179

$$

FRANK
826 
WGUS71 KBOX 131617
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1217 PM EDT WED AUG 13 2014

CTC015-131623-
/O.EXP.KBOX.FF.W.0034.000000T0000Z-140813T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINDHAM CT-
1217 PM EDT WED AUG 13 2014

...THE FLASH FLOOD WARNING FOR WINDHAM COUNTY WILL EXPIRE AT 1215 PM
EDT...

THE HEAVY RAIN THAT AFFECTED WINDHAM COUNTY EARLIER TODAY HAS 
MOVED OUT OF THE AREA. SCATTERED LIGHT TO MODERATE RAIN SHOWERS 
LINGER...BUT THE THREAT FOR FLASH FLOODING HAS SUBSIDED AT THIS 
TIME. AS A RESULT...THE FLASH FLOOD WARNING FOR WINDHAM COUNTY IS 
BEING ALLOWED TO EXPIRE. 

A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM.  THERE IS THE 
POTENTIAL FOR ADDITIONAL HEAVY RAINS OVER THE COURSE OF THE 
AFTERNOON.  

LAT...LON 4165 7204 4166 7213 4166 7216 4172 7225
      4173 7220 4174 7219 4175 7216 4183 7216
      4184 7222 4189 7222 4187 7180 4164 7179

$$

NMB

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 13, 5:38 AM EDTAreal Flood AdvisoryBOXCapitol Planning Region52 min
Aug 13, 6:17 AM EDTAreal Flood AdvisoryBOXCapitol Planning Region, Northeastern Connecticut Planning Region3 hr
Aug 13, 8:58 AM EDTAreal Flood AdvisoryBOXNortheastern Connecticut Planning Region2 hr
Aug 13, 12:43 PM EDTAreal Flood AdvisoryBOXCapitol Planning Region2 hr
Aug 13, 1:30 PM EDTFlash Flood WarningBOXCapitol Planning Region4 hr

Nearby

Flash Flood Warnings in Connecticut, 2014Every flash flood warning in 2014

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.