Alert archive / Massachusetts / Flash Flood Warnings in 2014
Flash Flood Warning 42, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Aug 13, 2014, 5:00 PM EDT for Hillsborough County, New Hampshire; Middlesex County, Worcester County, Massachusetts. It was in force for 4 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
- Aug 13, 2014, 5:00 PM EDT (21:00 UTC)
- Expired
- Aug 13, 2014, 9:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Middlesex County, MA, Worcester County, MA, Hillsborough County, NH
The radar
The Boston radar (KBOX), 107 km from the middle of the area, began a volume at 21:02 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
Gray, ME (KGYX), launched 12:00Z, 9.0 hours before the alert went out and 148 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
- 1245 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
034
WGUS51 KBOX 132100
FFWBOX
MAC017-027-NHC011-140100-
/O.NEW.KBOX.FF.W.0042.140813T2100Z-140814T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
500 PM EDT WED AUG 13 2014
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
NORTH CENTRAL MIDDLESEX COUNTY IN NORTHEAST MASSACHUSETTS...
EASTERN HILLSBOROUGH COUNTY IN SOUTHERN NEW HAMPSHIRE...
* UNTIL 900 PM EDT
* AT 454 PM EDT...DOPPLER RADAR INDICATED HEAVY RAIN APPROACHING THE
WARNED AREA. THE BAND OF HEAVY RAIN IS EXPECTED TO CROSS THROUGH
THE MANCHESTER TO NASHUA CORRIDOR IN NH...SOUTHWARD THROUGH
MIDDLESEX COUNTY MA...BETWEEN 5 AND 7 PM. THE POTENTIAL EXISTS FOR
RAINFALL RATES OF 1 TO 2 INCHES PER HOUR DURING THIS TIMEFRAME.
AS A RESULT...THERE IS A THREAT FOR FLASH FLOODING. THE MAIN
THREAT IS FOR RAPID URBAN AND POOR DRAINAGE INUNDATION...THOUGH
SOME SMALL STREAMS MAY APPROACH BANKFULL LEVELS.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MANCHESTER...LOWELL...NASHUA...METHUEN...BILLERICA...CHELMSFORD...
LEXINGTON...DRACUT...TEWKSBURY...MERRIMACK...HUDSON...WESTFORD...
ACTON...CONCORD...SUDBURY...GOFFSTOWN...MILFORD...CLINTON...
BEDFORD...PELHAM...PEPPERELL...TYNGSBOROUGH...AMHERST...GROTON...
MAYNARD...LUNENBURG...TOWNSEND...LITTLETON...WEARE AND LITCHFIELD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RAPID FLOODING OF STREETS AND UNDERPASSES IS IMMINENT. DO NOT DRIVE
THROUGH FLOODED ROADS AND FIND ALTERNATE ROUTES.
&&
LAT...LON 4305 7164 4307 7153 4305 7151 4304 7145
4302 7145 4301 7139 4294 7137 4293 7145
4284 7143 4283 7143 4282 7138 4277 7135
4274 7125 4243 7124 4238 7169 4313 7167
$$
NMB1 follow-up statement
260
WGUS71 KBOX 132342
FFSBOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
742 PM EDT WED AUG 13 2014
MAC017-027-NHC011-132347-
/O.CAN.KBOX.FF.W.0042.000000T0000Z-140814T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WORCESTER MA-MIDDLESEX MA-HILLSBOROUGH NH-
742 PM EDT WED AUG 13 2014
...THE FLASH FLOOD WARNING FOR NORTHEASTERN WORCESTER...NORTH CENTRAL
MIDDLESEX AND EASTERN HILLSBOROUGH COUNTIES IS CANCELLED...
THE HEAVY RAIN THAT CROSSED THROUGH THE MANCHESTER TO NASHUA
CORRIDOR AND NORTH CENTRAL MASSACHUSETTS HAS DIMINISHED AND MOVED TO
THE EAST...AND THE THREAT OF FLASH FLOODING HAS SUBSIDED. AS A
RESULT...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR THE AREA
HAS BEEN CANCELED.
MINOR PONDING OF WATER IN LOW LYING AND POOR DRAINAGE AREAS MAY
LINGER IN SOME AREAS THIS EVENING.
LAT...LON 4305 7164 4307 7153 4305 7151 4304 7145
4302 7145 4301 7139 4294 7137 4293 7145
4284 7143 4283 7143 4282 7138 4277 7135
4274 7125 4243 7124 4238 7169 4313 7167
$$
NMBThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 2:56 PM EDT | Flash Flood Warning | BOX | Cheshire, Hillsborough | 4 hr |
| Aug 13, 8:58 AM EDT | Areal Flood Advisory | BOX | Worcester | 2 hr |
| Aug 13, 10:33 AM EDT | Coastal Flood Advisory | BOX | Barnstable, Essex, Nantucket, Norfolk, Plymouth, Suffolk | 5 hr |
| Aug 13, 10:59 AM EDT | Areal Flood Advisory | BOX | Bristol, Middlesex, Norfolk, Worcester | 4 hr |
| Aug 13, 11:24 AM EDT | Flash Flood Warning | BOX | Bristol, Norfolk, Worcester | 4 hr |
| Aug 13, 12:43 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampden, Hampshire | 2 hr |
| Aug 13, 1:30 PM EDT | Flash Flood Warning | BOX | Hampden, Hampshire | 4 hr |
| Aug 13, 1:59 PM EDT | Flash Flood Warning | BOX | Franklin, Hampshire | 4 hr |
| Aug 13, 3:46 PM EDT | Flash Flood Warning | BOX | Franklin, Hampshire, Middlesex, Worcester | 4 hr |
| Aug 13, 4:23 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 32 min |
| Aug 13, 4:28 PM EDT | Special Marine Warning | BOX | 62 min | |
| Aug 13, 6:16 PM EDT | Areal Flood Advisory | BOX | Essex, Middlesex | 119 min |
Nearby
Flash Flood Warnings in Massachusetts, 2014Flash Flood Warnings in New Hampshire, 2014Every flash flood warning in 2014
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.