Alert archive / Connecticut / Flash Flood Warnings in 2009

Flash Flood Warning 8, NWS Boston/Norton, MA

June 27, 2009Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this flash flood warning at Jun 27, 2009, 8:45 PM EDT for Northeastern Connecticut Planning Region, Connecticut. It was in force for 90 min. 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: Jun 27, 2009, 8:45 PM EDT (00:45 UTC)
Expired: Jun 27, 2009, 10:15 PM EDT
In force: 90 min
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), 79 km from the middle of the area, began a volume at 00:46 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
Jun 27, 9:04 PM EDT	HEAVY RAIN 1.42	Thompson, CT	IN ONE HOUR...1.10 IN 20 MINUTES
Jun 27, 9:17 PM EDT	FLOOD	Killingly, CT	FOUR INCHES OF WATER ON I-395 NEAR EXIT 93.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.8 hours before the alert went out and 127 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: 166 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1388 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 13 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.

000 
WGUS51 KBOX 280045
FFWBOX
CTC015-280215-
/O.NEW.KBOX.FF.W.0008.090628T0045Z-090628T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
845 PM EDT SAT JUN 27 2009

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF PUTNAM...

* UNTIL 1015 PM EDT

* AT 843 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM NEAR BROOKLYN...OR 9 MILES NORTH
  OF PLAINFIELD...MOVING NORTH AT 5 MPH. RAINFALL RATES OF 2 TO 3 INCHES
  PER HOUR ARE LIKELY WITH THIS SLOW MOVING THUNDERSTORM. FLASH FLOODING
  IS IMMINENT.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY...INCLUDING UNDERPASSES. THE WATER MAY BE TOO DEEP TO ALLOW
VEHICLES TO CROSS SAFELY...OR THE ROADWAY MAY BE UNDERMINED.

A FLASH FLOOD WARNING MEANS THAT RAPID FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING NEAR STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS FLOODED AREAS BY FOOT OR IN YOUR VEHICLE.

LAT...LON 4180 7212 4183 7217 4184 7217 4184 7219
      4185 7221 4192 7210 4199 7182 4170 7179

$$
MLE

1 follow-up statement

000 
WGUS71 KBOX 280209
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1009 PM EDT SAT JUN 27 2009

CTC015-280218-
/O.EXP.KBOX.FF.W.0008.000000T0000Z-090628T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINDHAM CT-
1009 PM EDT SAT JUN 27 2009

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM EDT FOR CENTRAL
WINDHAM COUNTY...

THE HEAVIEST RAINFALL HAS ENDED ACROSS CENTRAL WINDHAM COUNTY. 
THEREFORE...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. 
HOWEVER...SIGNIFICANT PONDING OF WATER ON ROADWAYS AS WELL AS RISES 
IN SMALL STREAMS MAY STILL OCCUR THROUGH MIDNIGHT.

LAT...LON 4180 7212 4183 7217 4184 7217 4184 7219
      4185 7221 4192 7210 4199 7182 4170 7179

$$
MLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 8:19 PM EDT	Flash Flood Warning	BOX	Northeastern Connecticut Planning Region	116 min

Nearby

Flash Flood Warnings in Connecticut, 2009 Every flash flood warning in 2009

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.