Alert archive / Massachusetts / Flash Flood Warnings in 2014

Flash Flood Warning 17, NWS Boston/Norton, MA

July 7, 2014Middlesex County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jul 7, 2014, 4:24 PM EDT for Middlesex County, Worcester County, Massachusetts. It was in force for 111 min. 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: Jul 7, 2014, 4:24 PM EDT (20:24 UTC)
Expired: Jul 7, 2014, 6:15 PM EDT
In force: 111 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Middlesex County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 89 km from the middle of the area, began a volume at 20:24 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
Jul 7, 4:56 PM EDT	FLASH FLOOD	Fitchburg, MA	FLOODING UP TO AT LEAST ONE FOOT DEEP ACROSS ROADWAY UNDER TRAIN TRESSLE ON ROUTE 31. PHOTOS SENT VIA TWITTER.

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 12:00Z, 8.4 hours before the alert went out and 169 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1583 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

889 
WGUS51 KBOX 072024
FFWBOX
MAC017-027-072215-
/O.NEW.KBOX.FF.W.0017.140707T2024Z-140707T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
424 PM EDT MON JUL 7 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  NORTHWESTERN MIDDLESEX COUNTY IN NORTHEAST MASSACHUSETTS...

* UNTIL 615 PM EDT

* AT 422 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING   
  VERY HEAVY RAINS MOVING INTO THE GREATER FITCHBURG AND LEOMINSTER 
  AREA. RADAR INDICATED THAT 1 TO 1.5 INCHES OF RAIN MAY FALL IN AS  
  QUICKLY AS 20 MINUTES WITH THESE STORMS.  AS A RESULT...URBAN 
  FLASH FLOODING IS EXPECTED. THE GREATEST RISK IS IN FITCHBURG AND 
  LEOMINSTER. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LEOMINSTER...FITCHBURG...AND SOME SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAPID FLOODING OF STREETS AND UNDERPASSES IS IMMINENT. DO NOT DRIVE 
THROUGH FLOODED ROADS.

A FLASH FLOOD WARNING IS ISSUED FOR RAPID FLOODING. IN URBAN AREAS 
AVOID FLOODED ROADS AND OBEY ROAD CLOSURES. 

&&

LAT...LON 4270 7158 4240 7164 4250 7203 4271 7203

$$

NMB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 2:25 PM EDT	Special Weather Statement	BOX	Franklin	65 min
Jul 7, 2:41 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	49 min
Jul 7, 3:21 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	28 min
Jul 7, 3:46 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Middlesex, Worcester	44 min
Jul 7, 4:21 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	39 min
Jul 7, 4:41 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	37 min
Jul 7, 4:48 PM EDT	Tornado Warning	BOX	Middlesex, Worcester	42 min
Jul 7, 5:12 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	36 min
Jul 7, 5:29 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex, Suffolk	46 min
Jul 7, 5:32 PM EDT	Special Marine Warning	BOX		58 min
Jul 7, 5:40 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	36 min
Jul 7, 5:51 PM EDT	Tornado Warning	BOX	Middlesex, Suffolk	24 min
Jul 7, 6:11 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex	34 min
Jul 7, 6:33 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex, Suffolk	27 min
Jul 7, 6:36 PM EDT	Special Marine Warning	BOX		24 min
Jul 7, 6:52 PM EDT	Special Weather Statement	BOX	Franklin, Hampshire, Worcester	83 min
Jul 7, 7:16 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	44 min

Nearby

Flash Flood Warnings in Massachusetts, 2014 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.