Alert archive / Massachusetts / Flash Flood Warnings in 2014

Flash Flood Warning 19, NWS Boston/Norton, MA

July 15, 20144 counties in Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jul 15, 2014, 2:37 PM EDT for 4 counties in Massachusetts. It was in force for 113 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: Jul 15, 2014, 2:37 PM EDT (18:37 UTC)
Expired: Jul 15, 2014, 4:30 PM EDT
In force: 113 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 98 km from the middle of the area, began a volume at 18:39 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, 6.6 hours before the alert went out and 139 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: 123 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 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.

920 
WGUS51 KBOX 151837
FFWBOX
MAC011-013-015-027-152030-
/O.NEW.KBOX.FF.W.0019.140715T1837Z-140715T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
237 PM EDT TUE JUL 15 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  SOUTHEASTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...
  SOUTHEASTERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...
  SOUTHWESTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...

* UNTIL 430 PM EDT

* AT 235 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  TORRENTIAL DOWNPOURS FROM HAMPDEN AND LONGMEADOW TO HARDWICK... 
  MOVING NORTHEAST AT 40 MPH. THESE STORMS WERE PRODUCING RAINFALL 
  RATES OF AROUND 2 INCHES PER HOUR...AND WILL CAUSE RAPID FLOODING 
  OF STREETS AND LOW LYING AREAS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SPRINGFIELD...CHICOPEE...ENFIELD...LEOMINSTER...AGAWAM...LUDLOW...
  HOLDEN...LONGMEADOW...EAST LONGMEADOW...BELCHERTOWN...WILBRAHAM...
  PALMER...STAFFORD...SPENCER...ATHOL...SOMERS...WARE...STURBRIDGE...
  MONSON...TEMPLETON...RUTLAND...STERLING...WESTMINSTER...GRANBY...
  BARRE...HAMPDEN...WARREN...PAXTON...NORTH BROOKFIELD AND
  HUBBARDSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAPID AND POTENTIALLY LIFE THREATENING FLOODING OF STREETS AND
UNDERPASSES IS IMMINENT. DO NOT DRIVE THROUGH FLOODED ROADS AND FIND
ALTERNATE ROUTES.

&&

LAT...LON 4254 7225 4253 7174 4203 7216 4203 7264

$$

JWD

4 follow-up statements

595 
WGUS71 KBOX 151904
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
304 PM EDT TUE JUL 15 2014

MAC011-151912-
/O.CAN.KBOX.FF.W.0019.000000T0000Z-140715T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN MA-
304 PM EDT TUE JUL 15 2014

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN FRANKLIN COUNTY IS
CANCELLED...

DOWNPOURS HAVE EXITED EASTERN FRANKLIN COUNTY. THEREFORE THE FLASH 
FLOOD WARNING HAS BEEN CANCELLED.

ADDITIONAL FLASH FLOODING IS STILL POSSIBLE THROUGH THIS EVENING. 

&&

LAT...LON 4233 7236 4231 7236 4232 7233 4238 7231
      4253 7217 4253 7174 4203 7216 4203 7264

$$

MAC013-015-027-152030-
/O.CON.KBOX.FF.W.0019.000000T0000Z-140715T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAMPDEN MA-HAMPSHIRE MA-WORCESTER MA-
304 PM EDT TUE JUL 15 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR
SOUTHEASTERN HAMPDEN...SOUTHEASTERN HAMPSHIRE AND SOUTHWESTERN
WORCESTER COUNTIES...

AT 302 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
TORRENTIAL RAINFALL FROM HUBBARDSTON TO MONSON...MOVING NORTHEAST AT 
40 MPH.

RAINFALL RATES OF AROUND 2 INCHES PER HOUR WILL CAUSE RAPID FLOODING 
OF STREETS...UNDERPASSES AND OTHER URBAN AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAPID AND POTENTIALLY LIFE THREATENING FLOODING OF STREETS AND
UNDERPASSES IS IMMINENT. DO NOT DRIVE THROUGH FLOODED ROADS AND FIND
ALTERNATE ROUTES.

&&

LAT...LON 4233 7236 4231 7236 4232 7233 4238 7231
      4253 7217 4253 7174 4203 7216 4203 7264

$$

JWD

138 
WGUS71 KBOX 151922
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
322 PM EDT TUE JUL 15 2014

MAC015-151930-
/O.CAN.KBOX.FF.W.0019.000000T0000Z-140715T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAMPSHIRE MA-
322 PM EDT TUE JUL 15 2014

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN HAMPSHIRE COUNTY IS
CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO 
POSE A THREAT. THEREFORE THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

&&

LAT...LON 4223 7229 4223 7226 4224 7224 4225 7221
      4227 7221 4229 7219 4237 7216 4250 7216
      4253 7174 4203 7216 4203 7264

$$

MAC013-027-152030-
/O.CON.KBOX.FF.W.0019.000000T0000Z-140715T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAMPDEN MA-WORCESTER MA-
322 PM EDT TUE JUL 15 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR
SOUTHEASTERN HAMPDEN AND SOUTHWESTERN WORCESTER COUNTIES...

AT 320 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
TORRENTIAL DOWNPOURS FROM HUBBARDSTON TO WARREN...MOVING NORTHEAST 
AT 40 MPH.

RAINFALL RATES OF UP TO 2 INCHES PER HOUR WILL CAUSE RAPID FLOODING 
OF STREETS AND UNDERPASSES IS EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAPID AND POTENTIALLY LIFE THREATENING FLOODING OF STREETS AND
UNDERPASSES IS IMMINENT. DO NOT DRIVE THROUGH FLOODED ROADS AND FIND
ALTERNATE ROUTES.

&&

LAT...LON 4223 7229 4223 7226 4224 7224 4225 7221
      4227 7221 4229 7219 4237 7216 4250 7216
      4253 7174 4203 7216 4203 7264

$$

JWD

517 
WGUS71 KBOX 151931
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
331 PM EDT TUE JUL 15 2014

MAC013-027-152030-
/O.CON.KBOX.FF.W.0019.000000T0000Z-140715T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAMPDEN MA-WORCESTER MA-
331 PM EDT TUE JUL 15 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR
EASTERN HAMPDEN AND SOUTHWESTERN WORCESTER COUNTIES...

AT 330 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
HEAVY RAIN FROM HUBBARDSTON TO EAST BROOKFIELD.

RAINFALL RATES OF UP TO 2 INCHES PER HOUR WILL CAUSE RAPID FLOODING 
OF STREETS AND UNDERPASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAPID AND POTENTIALLY LIFE THREATENING FLOODING OF STREETS AND
UNDERPASSES IS IMMINENT. DO NOT DRIVE THROUGH FLOODED ROADS AND FIND
ALTERNATE ROUTES.

&&

LAT...LON 4217 7221 4218 7219 4221 7217 4225 7221
      4226 7215 4228 7212 4234 7212 4244 7202
      4253 7174 4210 7210 4213 7221

$$

JWD

923 
WGUS71 KBOX 151941
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
341 PM EDT TUE JUL 15 2014

MAC013-027-151950-
/O.CAN.KBOX.FF.W.0019.000000T0000Z-140715T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAMPDEN MA-WORCESTER MA-
341 PM EDT TUE JUL 15 2014

...THE FLASH FLOOD WARNING FOR EASTERN HAMPDEN AND SOUTHWESTERN
WORCESTER COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT. THEREFORE THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

&&

LAT...LON 4217 7221 4218 7219 4221 7217 4225 7221
      4226 7215 4228 7212 4234 7212 4244 7202
      4253 7174 4210 7210 4213 7221

$$

JWD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 2:08 PM EDT	Special Weather Statement	BOX	Hampden	22 min
Jul 15, 2:23 PM EDT	Special Weather Statement	BOX	Worcester	22 min
Jul 15, 2:41 PM EDT	Special Weather Statement	BOX	Hampden	34 min
Jul 15, 2:53 PM EDT	Special Weather Statement	BOX	Worcester	37 min
Jul 15, 3:25 PM EDT	Special Weather Statement	BOX	Worcester	50 min
Jul 15, 4:01 PM EDT	Special Weather Statement	BOX	Middlesex	29 min
Jul 15, 4:04 PM EDT	Tornado Warning	BOX	Middlesex	22 min
Jul 15, 4:19 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	41 min
Jul 15, 4:30 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	34 min
Jul 15, 4:31 PM EDT	Flash Flood Warning	BOX	Essex, Middlesex, Worcester	119 min
Jul 15, 4:41 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	21 min
Jul 15, 4:45 PM EDT	Special Marine Warning	BOX		90 min
Jul 15, 4:59 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.