Alert archive / Massachusetts / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS Boston/Norton, MA

August 13, 2016Worcester County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Aug 13, 2016, 10:25 PM EDT for Worcester County, Massachusetts. It was in force for 2 hr. 7 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: Aug 13, 2016, 10:25 PM EDT (02:25 UTC)
Expired: Aug 14, 2016, 12:30 AM EDT
In force: 2 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

County Worcester County, MA

The radar

The Boston radar (KBOX), 89 km from the middle of the area, began a volume at 02:26 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 13, 10:25 PM EDT	FLOOD	Leominster, MA	3 FEET OF STREET FLOODING ON CENTRAL STREET
Aug 13, 10:28 PM EDT	FLOOD	Leominster, MA	LANCASTER STREET UNDER THE BRIDGE IS FLOODED
Aug 13, 10:29 PM EDT	FLOOD	Leominster, MA	CARS STUCK IN FLOOD WATERS INCLUDING ON ROUTE 117 BY SHOPPING PLAZA
Aug 13, 10:34 PM EDT	FLOOD	Leominster, MA	MANHOLE COVERS PUSHED OUT BY FLOODING ON WEST STREET
Aug 13, 10:40 PM EDT	FLOOD	Leominster, MA	POLICE DEPARTMENT PARKING LOT IS FLOODED
Aug 13, 10:46 PM EDT	FLOOD	Leominster, MA	THREE CARS STUCK IN FLOOD WATERS ON MECHANIC STREET
Aug 13, 10:54 PM EDT	FLOOD	Fitchburg, MA	WATER A FOOT DEEP ON JOHN FITCH HIGHWAY AND ADJOINING PARKING LOT

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

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 2.4 hours before the alert went out and 154 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: 2222 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1393 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

As transmitted.

843 
WGUS51 KBOX 140225
FFWBOX
MAC027-140430-
/O.NEW.KBOX.FF.W.0004.160814T0225Z-160814T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1025 PM EDT SAT AUG 13 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...

* UNTIL 1230 AM EDT

* AT 1023 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. RADAR INDICATED 3 TO 4 INCHES
  OF RAIN HAS FALLEN FROM WESTMINSTER TO PELHAM. FLASH FLOODING IS
  EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LEOMINSTER...FITCHBURG...GARDNER...HOLDEN...CLINTON...SPENCER...
  LUNENBURG...LANCASTER...TEMPLETON...RUTLAND...STERLING...
  WEST BOYLSTON...WESTMINSTER...HARVARD...BARRE...WARREN...BOLTON...
  PAXTON...NORTH BROOKFIELD AND HUBBARDSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4262 7175 4254 7168 4253 7168 4253 7166
      4246 7160 4222 7220 4228 7221 4229 7220
      4230 7222 4251 7226 4251 7224 4252 7225

$$

AED

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:22 PM EDT	Special Weather Statement	BOX	Franklin	38 min
Aug 13, 8:37 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	53 min
Aug 13, 8:59 PM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire	61 min
Aug 13, 9:04 PM EDT	Areal Flood Warning	BOX	Franklin, Hampshire, Middlesex, Worcester	116 min
Aug 13, 9:04 PM EDT	Special Weather Statement	BOX	Middlesex	56 min
Aug 13, 9:09 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	44 min
Aug 13, 9:29 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	46 min
Aug 13, 9:31 PM EDT	Areal Flood Warning	BOX	Franklin, Hampshire, Worcester	119 min
Aug 13, 9:59 PM EDT	Special Weather Statement	BOX	Essex, Middlesex, Worcester	61 min
Aug 13, 10:07 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire, Middlesex, Worcester	38 min
Aug 13, 10:15 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire, Worcester	45 min
Aug 13, 10:38 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	52 min
Aug 13, 11:04 PM EDT	Special Weather Statement	BOX	Norfolk	41 min
Aug 13, 11:06 PM EDT	Special Marine Warning	BOX		54 min
Aug 13, 11:35 PM EDT	Special Weather Statement	BOX	Bristol, Norfolk, Plymouth	55 min
Aug 13, 11:42 PM EDT	Special Marine Warning	BOX		63 min
Aug 14, 12:44 AM EDT	Special Marine Warning	BOX		61 min
Aug 14, 1:44 AM EDT	Special Marine Warning	BOX		61 min
Aug 14, 1:50 AM EDT	Severe Thunderstorm Warning	BOX	Worcester	40 min
Aug 14, 2:04 AM EDT	Special Weather Statement	BOX	Bristol, Norfolk	56 min
Aug 14, 2:10 AM EDT	Special Marine Warning	BOX		65 min
Aug 14, 2:28 AM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Plymouth, Suffolk	32 min
Aug 14, 3:13 AM EDT	Special Marine Warning	BOX		62 min
Aug 14, 3:28 AM EDT	Excessive Heat Warning	BOX	Bristol, Plymouth	16 hr
Aug 14, 7:27 PM EDT	Special Weather Statement	BOX	Worcester	33 min
Aug 14, 7:47 PM EDT	Special Weather Statement	BOX	Worcester	28 min
Aug 14, 7:49 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	38 min

Nearby

Flash Flood Warnings in Massachusetts, 2016 Every flash flood warning in 2016

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.