Alert archive / Connecticut / Flash Flood Warnings in 2011
Flash Flood Warning 18, NWS New York, NY
NWS New York, NY issued this flash flood warning at Aug 1, 2011, 6:26 PM EDT for Naugatuck Valley Planning Region, Connecticut. It was in force for 2 hr. 1 report 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
- Aug 1, 2011, 6:26 PM EDT (22:26 UTC)
- Expired
- Aug 1, 2011, 8:30 PM EDT
- In force
- 2 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
The radar
The Brookhaven radar (KOKX), 62 km from the middle of the area, began a volume at 22:28 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 |
|---|---|---|---|
| Aug 1, 7:27 PM EDT | FLASH FLOOD | Ansonia, CT | STREET AND BASEMENT FLOODING |
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 12:00Z, 10.4 hours before the alert went out and 62 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.
- Mixed-layer CAPE
- 529 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 975 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
421
WGUS51 KOKX 012226
FFWOKX
CTC009-020030-
/O.NEW.KOKX.FF.W.0018.110801T2226Z-110802T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE UPTON NY
ISSUED BY NATIONAL WEATHER SERVICE TAUNTON MA
626 PM EDT MON AUG 1 2011
THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NEW HAVEN COUNTY IN SOUTHERN CONNECTICUT...
THIS INCLUDES THE CITIES OF...WOLCOTT...WATERBURY...WALLINGFORD...
NEW HAVEN...NAUGATUCK...MERIDEN...GUILFORD...
* UNTIL 830 PM EDT
* AT 621 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A CLUSTER OF THUNDERSTORMS PRODUCING LOCALLY TORRENTIAL RAINS IN
CENTRAL CONNECTICUT. THE STORMS WERE CENTERED OVER
WATERBURY...TRACKING SOUTHEAST. RAINFALL
RATES OF UP TO 3 INCHES IN AN HOUR ARE POSSIBLE WITH THE STORMS AS
THEY MOVE THROUGH NEW HAVEN COUNTY. AS A RESULT...URBAN FLASH
FLOODING IS EXPECTED IN NEW HAVEN COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL WILL CAUSE RAPID FLOODING OF URBAN AREAS...
INCLUDING ROADS AND UNDERPASSES. FLOOD WATERS MAY BECOME DEEP ENOUGH
TO STRAND VEHICLES! AVOID FLOODED ROADWAYS!
&&
LAT...LON 4157 7294 4156 7286 4158 7280 4156 7277
4143 7274 4143 7267 4133 7261 4126 7252
4127 7263 4124 7270 4126 7276 4123 7287
4128 7291 4129 7290 4129 7291 4122 7302
4155 7316 4158 7307 4164 7303 4165 7294
$$
NMB1 follow-up statement
795
WGUS71 KOKX 020010
FFSOKX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
810 PM EDT MON AUG 1 2011
CTC009-020030-
/O.CON.KOKX.FF.W.0018.000000T0000Z-110802T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW HAVEN CT-
810 PM EDT MON AUG 1 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM EDT FOR
CENTRAL NEW HAVEN COUNTY...
AT 757 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWS THAT
RAIN HAS ENDED AND NO ADDITIONAL RAINFALL IS FORECAST THE REST OF
THE NIGHT OVER THE LOCAL AREA.
FLOOD WATERS IN ANSONIA...DERBY...WOLCOTT...WATERBURY...PROSPECT AND
SURROUNDING AREAS WILL CONTINUE TO RECEDE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 4157 7294 4156 7286 4141 7284 4129 7291
4128 7305 4146 7312 4158 7308 4158 7307
4164 7303 4165 7294
$$
JSTThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 12:42 PM EDT | Special Weather Statement | OKX | 48 min | |
| Aug 1, 12:55 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 50 min |
| Aug 1, 1:44 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 46 min |
| Aug 1, 2:13 PM EDT | Special Weather Statement | OKX | 32 min | |
| Aug 1, 2:27 PM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region | 3 hr |
| Aug 1, 2:36 PM EDT | Special Weather Statement | OKX | 39 min | |
| Aug 1, 3:02 PM EDT | Special Weather Statement | OKX | 3 min | |
| Aug 1, 4:40 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 65 min |
| Aug 1, 5:32 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 58 min |
| Aug 1, 5:34 PM EDT | Severe Thunderstorm Warning | OKX | Naugatuck Valley Planning Region | 56 min |
| Aug 1, 5:38 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 52 min |
| Aug 1, 5:57 PM EDT | Severe Thunderstorm Warning | OKX | Lower Connecticut River Valley Planning Region | 63 min |
| Aug 1, 6:20 PM EDT | Severe Thunderstorm Warning | OKX | Naugatuck Valley Planning Region | 40 min |
| Aug 1, 6:52 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 53 min |
| Aug 1, 6:55 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region | 48 min |
Nearby
Flash Flood Warnings in Connecticut, 2011Every 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.