Alert archive / Connecticut / Flash Flood Warnings in 2012

Flash Flood Warning 5, NWS Boston/Norton, MA

July 18, 2012Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; Hampden County, Worcester County, Massachusetts; Kent County, Providence County, Rhode Island

NWS Boston/Norton, MA issued this flash flood warning at Jul 18, 2012, 2:24 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; Hampden County, Worcester County, Massachusetts; Kent County, Providence County, Rhode Island. It was in force for 3 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
Jul 18, 2012, 2:24 PM EDT (18:24 UTC)
Expired
Jul 18, 2012, 5:36 PM EDT
In force
3 hr
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT, Hampden County, MA, Worcester County, MA, Kent County, RI, Providence County, RI

The radar

The Boston radar (KBOX), 86 km from the middle of the area, began a volume at 18:25 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, 6.4 hours before the alert went out and 119 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 2012-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2129 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, Brookhaven, NY at 12:00Z on 2012-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 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
2129 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
1491 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
95 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.

595 
WGUS51 KBOX 181824
FFWBOX
CTC003-013-015-MAC013-027-RIC003-007-182215-
/O.NEW.KBOX.FF.W.0005.120718T1824Z-120718T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
224 PM EDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  SOUTHEASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  SOUTHERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  KENT COUNTY IN  RHODE ISLAND...
  PROVIDENCE COUNTY IN  RHODE ISLAND...

* UNTIL 615 PM EDT

* AT 212 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS WESTERN CONNECTICUT AS WELL AS HAMPDEN AND 
  SOUTHERN WORCESTER COUNTIES IN MASSACHUSETTS. FLASH FLOODING OF 
  POOR DRAINAGE AND URBAN AREAS IS EXPECTED TO BEGIN SHORTLY.

NORTHERN CONNECTICUT...CENTRAL AND NORTHERN RHODE ISLAND AS WELL AS 
HAMPDEN AND WORCESTER COUNTIES IN MASSACHUSETTS WILL EXPERIENCE 
REPEATED THUNDERSTORMS WITH HEAVY RAINFALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES.  ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS
AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4181 7295 4197 7289 4197 7300 4214 7298
      4218 7153 4202 7152 4202 7138 4177 7132
      4178 7139 4167 7137 4169 7145 4160 7149
      4160 7179 4164 7179 4166 7216 4171 7224
      4159 7239 4165 7253 4156 7295 4180 7302

$$

AED
1 follow-up statement
037 
WGUS71 KBOX 182136
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
ISSUED BY NATIONAL WEATHER SERVICE NEW YORK NY
536 PM EDT WED JUL 18 2012

CTC003-013-015-MAC013-027-RIC003-007-182144-
/O.CAN.KBOX.FF.W.0005.000000T0000Z-120718T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOLLAND CT-WINDHAM CT-HARTFORD CT-WORCESTER MA-HAMPDEN MA-
PROVIDENCE RI-KENT RI-
536 PM EDT WED JUL 18 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR KENT...
PROVIDENCE...SOUTHERN HAMPDEN...SOUTHERN WORCESTER...HARTFORD...
WINDHAM AND TOLLAND COUNTIES...

SCATTERED SHOWERS AND LIGHT RAIN ARE EXPECTED THIS EVENING...BUT NO 
ADDITIONAL FLASH FLOODING IS FORECAST. 


LAT...LON 4181 7295 4197 7289 4197 7300 4214 7298
      4218 7153 4202 7152 4202 7138 4177 7132
      4178 7139 4167 7137 4169 7145 4160 7149
      4160 7179 4164 7179 4166 7216 4171 7224
      4159 7239 4165 7253 4156 7295 4180 7302

$$

JST

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 12:41 PM EDTHeat AdvisoryBOXCapitol Planning Region, Northeastern Connecticut Planning Region6 hr
Jul 18, 2:04 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region56 min
Jul 18, 2:21 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region54 min
Jul 18, 2:29 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region, Northeastern Connecticut Planning Region61 min
Jul 18, 2:44 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region61 min
Jul 18, 3:46 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region59 min
Jul 17, 8:23 PM EDTSpecial Weather StatementBOXEssex67 min
Jul 18, 12:37 PM EDTSpecial Weather StatementBOXMiddlesex53 min
Jul 18, 12:54 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex66 min
Jul 18, 1:21 PM EDTSpecial Marine WarningBOX84 min
Jul 18, 1:29 PM EDTFlash Flood WarningBOXEssex, Middlesex98 min
Jul 18, 1:43 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex, Suffolk36 min
Jul 18, 1:45 PM EDTSpecial Marine WarningBOX60 min
Jul 18, 1:50 PM EDTSpecial Weather StatementBOXHampden40 min
Jul 18, 2:04 PM EDTTornado WarningBOXEssex, Suffolk12 min
Jul 18, 2:21 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex, Suffolk39 min
Jul 18, 2:30 PM EDTSpecial Marine WarningBOX90 min
Jul 18, 2:39 PM EDTSevere Thunderstorm WarningBOXBristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester51 min
Jul 18, 3:09 PM EDTSevere Thunderstorm WarningBOXBristol, Norfolk, Worcester51 min
Jul 18, 4:04 PM EDTSpecial Marine WarningBOX56 min
Jul 18, 4:25 PM EDTSpecial Marine WarningBOX80 min
Jul 18, 4:42 PM EDTSevere Thunderstorm WarningBOXBarnstable, Plymouth36 min
Jul 18, 5:08 PM EDTSpecial Weather StatementBOXNorfolk, Suffolk52 min
Jul 18, 5:24 PM EDTFlash Flood WarningBOXMiddlesex, Norfolk, Suffolk78 min
Jul 18, 5:27 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Plymouth, Suffolk48 min
Jul 18, 5:30 PM EDTSpecial Marine WarningBOX54 min
Jul 18, 6:08 PM EDTSpecial Marine WarningBOX67 min
Jul 18, 6:27 PM EDTSpecial Weather StatementBOXEssex33 min
Jul 18, 4:57 PM EDTSevere Thunderstorm WarningBOXProvidence13 min

Nearby

Flash Flood Warnings in Connecticut, 2012Flash Flood Warnings in Massachusetts, 2012Flash Flood Warnings in Rhode Island, 2012Every flash flood warning in 2012

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.