Alert archive / Massachusetts / Flash Flood Warnings in 2011
Flash Flood Warning 12, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Sep 1, 2011, 6:01 PM EDT for Franklin County, Massachusetts. It was in force for 59 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
- Sep 1, 2011, 6:01 PM EDT (22:01 UTC)
- Expired
- Sep 1, 2011, 7:00 PM EDT
- In force
- 59 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
County Franklin County, MA
The radar
The Albany radar (KENX), 108 km from the middle of the area, began a volume at 22:04 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, 10.0 hours before the alert went out and 89 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 803 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
888 WGUS51 KBOX 012201 FFWBOX MAC011-012300- /O.NEW.KBOX.FF.W.0012.110901T2201Z-110901T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TAUNTON MA 601 PM EDT THU SEP 1 2011 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL FRANKLIN COUNTY IN WESTERN MASSACHUSETTS... * UNTIL 700 PM EDT * AT 552 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER CHARLEMONT INTO SOUTHERN COLRAIN. THIS THUNDERSTORM HAS BECOME NEARLY STATIONARY ACROSS EASTERN CHARLEMONT. WEATHER RADAR HAS INDICATED THAT THIS STORM MAY BE PRODUCING UP TO 3 INCHES OF RAIN IN AN HOUR. 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 4264 7271 4260 7273 4262 7279 4265 7278 $$ EVT
1 follow-up statement
151 WGUS71 KBOX 012302 FFSBOX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 702 PM EDT THU SEP 1 2011 MAC011-012312- /O.EXP.KBOX.FF.W.0012.000000T0000Z-110901T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ FRANKLIN MA- 702 PM EDT THU SEP 1 2011 ...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL FRANKLIN COUNTY... THE HEAVY RAINFALL ACROSS COLRAIN AND CHARLEMONT HAS MOVED TO THE EAST. LAT...LON 4264 7271 4260 7273 4262 7279 4265 7278 $$ EVT
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 3:29 PM EDT | Special Weather Statement | BOX | Franklin | 61 min |
| Sep 1, 3:44 PM EDT | Small Craft Advisory for Hazardous Seas | BOX | 49 hr | |
| Sep 1, 3:46 PM EDT | Areal Flood Advisory | BOX | Franklin | 3 hr |
Nearby
Flash 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.