Alert archive / Connecticut / Flash Flood Warnings in 2011
Flash Flood Warning 6, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Aug 1, 2011, 2:19 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; Hampden County, Hampshire County, Worcester County, Massachusetts. It was in force for 116 min. 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 1, 2011, 2:19 PM EDT (18:19 UTC)
- Expired
- Aug 1, 2011, 4:15 PM EDT
- In force
- 116 min
- 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, Hampshire County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 107 km from the middle of the area, began a volume at 18:23 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
Albany, NY (KALY), launched 12:00Z, 6.3 hours before the alert went out and 132 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
- 1159 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
360 WGUS51 KBOX 011819 FFWBOX CTC003-013-015-MAC013-015-027-012015- /O.NEW.KBOX.FF.W.0006.110801T1819Z-110801T2015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TAUNTON MA 219 PM EDT MON AUG 1 2011 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS... NORTHEASTERN HARTFORD COUNTY IN NORTHERN CONNECTICUT... NORTHERN TOLLAND COUNTY IN NORTHERN CONNECTICUT... EXTREME NORTHWESTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT... EASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS... THIS INCLUDES THE CITY OF SPRINGFIELD... SOUTHEASTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS... * UNTIL 415 PM EDT * AT 213 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED TWO CLUSTERS OF THUNDERSTORMS TRACKING INTO THE WARNING AREA. THESE THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE UP TO 3 TO 4 INCHES OF RAINFALL IN AN HOUR...WHICH WOULD BRING FLASH FLOODING TO THE WARNING AREA. THE MAIN THREAT FROM THESE THUNDERSTORMS IS SUBSTANTIAL URBAN AND POOR DRAINAGE FLOODING. HOWEVER...FLASH FLOODING FROM SMALL STREAMS IS ALSO POSSIBLE. FLASH FLOODING OF SMALL STREAMS AND URBAN AREAS IS OCCURRING OR IMMINENT. THOSE NEAR STREAMS AND CREEKS...OR IN AREAS PRONE TO FLOODING SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. AVOID FLOODED ROADS. THE WATER MAY BE TOO DEEP TO ALLOW VEHICLES TO CROSS SAFELY... OR THE ROADWAY MAY BE UNDERMINED. TURN AROUND...DONT DROWN! && LAT...LON 4229 7258 4221 7216 4193 7219 4198 7254 $$ NMB
2 follow-up statements
182 WGUS71 KBOX 011843 FFSBOX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 243 PM EDT MON AUG 1 2011 CTC003-013-015-MAC013-015-027-012015- /O.CON.KBOX.FF.W.0006.000000T0000Z-110801T2015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HARTFORD CT-TOLLAND CT-WINDHAM CT-WORCESTER MA-HAMPSHIRE MA- HAMPDEN MA- 243 PM EDT MON AUG 1 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR EASTERN HAMPDEN...SOUTHEASTERN HAMPSHIRE...WEST CENTRAL WORCESTER... EXTREME NORTHWESTERN WINDHAM...NORTHERN TOLLAND AND NORTHEASTERN HARTFORD COUNTIES... AT 236 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT TWO CLUSTERS OF THUNDERSTORMS HAD MERGED OVER THE WILBRAHAM TO MONSON AREA AS WELL AS SURROUNDING COMMUNITIES. THIS WILL RESULT IN A PERIOD OF TORRENTIAL DOWNPOURS. RAINFALL OF UP TO 3 TO 4 INCHES IN AN HOUR IS POSSIBLE. AS A RESULT...FLASH FLOODING IS EXPECTED. THE MAIN THREAT IS SIGNIFICANT FLOODING IN LOW LYING AND POOR DRAINAGE AREAS...AS WELL AS URBAN AREAS. HOWEVER...SMALL STREAM FLASH FLOODING IS ALSO A THREAT. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE AND CENTRAL RHODE ISLAND. && LAT...LON 4229 7258 4221 7216 4193 7219 4198 7254 $$ NMB
621 WGUS71 KBOX 012019 FFSBOX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 419 PM EDT MON AUG 1 2011 CTC003-013-015-MAC013-015-027-012026- /O.EXP.KBOX.FF.W.0006.000000T0000Z-110801T2015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HARTFORD CT-TOLLAND CT-WINDHAM CT-WORCESTER MA-HAMPSHIRE MA- HAMPDEN MA- 419 PM EDT MON AUG 1 2011 ...THE FLASH FLOOD WARNING HAS EXPIRED FOR EASTERN HAMPDEN... SOUTHEASTERN HAMPSHIRE...WEST CENTRAL WORCESTER...EXTREME NORTHWESTERN WINDHAM...NORTHERN TOLLAND AND NORTHEASTERN HARTFORD COUNTIES... AT 419 PM...RADAR INDICATED THAT THE THUNDERSTORMS PRODUCING THE HEAVIEST RAINFALL HAD TRACKED OUT OF THE IMMEDIATE SPRINGFIELD TO MONSON AREA. SCATTERED THUNDERSTORMS REMAINED...BUT THE STORMS IN THE AREA AT THIS TIME ARE NOT EXPECTED TO PRODUCE FLASH FLOODING. AS A RESULT...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR THE AREA HAS BEEN ALLOWED TO EXPIRE AT THIS TIME. ADDITIONAL THUNDERSTORMS WITH LOCALLY HEAVY RAINS WILL BE POSSIBLE THIS EVENING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE AND CENTRAL RHODE ISLAND. LAT...LON 4229 7258 4221 7216 4193 7219 4198 7254 $$ NMB
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 2:13 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 47 min |
| Aug 1, 3:05 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 17 min |
| Aug 1, 3:41 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 49 min |
| Aug 1, 4:00 PM EDT | Special Weather Statement | BOX | 45 min | |
| Aug 1, 4:15 PM EDT | Areal Flood Advisory | BOX | Capitol Planning Region | 3 hr |
| Aug 1, 4:18 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 29 min |
| Aug 1, 4:35 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 24 min |
| Aug 1, 4:45 PM EDT | Special Weather Statement | BOX | 45 min | |
| Aug 1, 5:10 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 35 min |
| Aug 1, 6:03 PM EDT | Special Weather Statement | BOX | 42 min | |
| Aug 1, 12:37 PM EDT | Special Weather Statement | BOX | Hampshire | 53 min |
| Aug 1, 1:24 PM EDT | Special Weather Statement | BOX | Hampshire | 51 min |
| Aug 1, 1:27 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampshire, Worcester | 3 hr |
| Aug 1, 1:34 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 19 min |
| Aug 1, 1:41 PM EDT | Flash Flood Warning | BOX | Franklin, Hampshire, Worcester | 3 hr |
| Aug 1, 1:55 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 35 min |
| Aug 1, 2:03 PM EDT | Special Weather Statement | BOX | Franklin | 42 min |
| Aug 1, 2:08 PM EDT | Special Weather Statement | BOX | Hampden | 52 min |
| Aug 1, 2:19 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 41 min |
| Aug 1, 3:01 PM EDT | Special Weather Statement | BOX | Worcester | 59 min |
| Aug 1, 3:10 PM EDT | Special Weather Statement | BOX | Franklin | 50 min |
| Aug 1, 3:14 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 38 min |
| Aug 1, 3:18 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 42 min |
| Aug 1, 3:30 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 45 min |
| Aug 1, 3:33 PM EDT | Special Weather Statement | BOX | Hampden | 57 min |
| Aug 1, 3:40 PM EDT | Areal Flood Advisory | BOX | Franklin, Worcester | 113 min |
| Aug 1, 3:59 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 61 min |
| Aug 1, 4:07 PM EDT | Flash Flood Warning | BOX | Franklin, Worcester | 82 min |
| Aug 1, 4:08 PM EDT | Special Weather Statement | BOX | Essex | 67 min |
| Aug 1, 4:31 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 27 min |
| Aug 1, 4:37 PM EDT | Special Weather Statement | BOX | Franklin | 23 min |
| Aug 1, 4:42 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 63 min |
| Aug 1, 4:55 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampshire, Worcester | 3 hr |
| Aug 1, 5:29 PM EDT | Special Weather Statement | BOX | Franklin | 31 min |
| Aug 1, 6:29 PM EDT | Special Weather Statement | BOX | Hampshire | 46 min |
Nearby
Flash Flood Warnings in Connecticut, 2011Flash Flood Warnings in Massachusetts, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.