Alert archive / Massachusetts / Flash Flood Warnings in 2017

Flash Flood Warning 16, NWS Boston/Norton, MA

August 2, 2017Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Aug 2, 2017, 2:24 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 3 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 2, 2017, 2:24 PM EDT (18:24 UTC)
Expired: Aug 2, 2017, 5:30 PM EDT
In force: 3 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Hampden County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 97 km from the middle of the area, began a volume at 18:25 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, 6.4 hours before the alert went out and 85 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: 312 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1098 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

890 
WGUS51 KBOX 021824
FFWBOX
MAC013-015-022130-
/O.NEW.KBOX.FF.W.0016.170802T1824Z-170802T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Taunton MA
224 PM EDT WED AUG 2 2017

The National Weather Service in Taunton has issued a

* Flash Flood Warning for...
  Southwestern Hampshire County in western Massachusetts...
  Northwestern Hampden County in western Massachusetts...

* Until 530 PM EDT

* At 224 PM EDT, Doppler radar indicated thunderstorms producing 
  torrential rain across the warned area. Flash flooding is expected 
  to begin shortly. 

* Some locations that will experience flooding include...
  Southampton, Huntington, Russell, Westhampton, Chester, Blandford,
  Chesterfield, Worthington, Montgomery and Middlefield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Warning means that flooding will occur quickly, and
could be life threatening for those who try to drive through flooded
roads or underpasses. Find alternate routes. Those near small streams
need to get to higher ground immediately.

&&

LAT...LON 4240 7284 4225 7277 4215 7301 4221 7302
      4225 7300 4231 7300 4231 7303 4232 7304

$$

JWD

1 follow-up statement

420 
WGUS71 KBOX 021926
FFSBOX

Flash Flood Statement
National Weather Service Taunton MA
326 PM EDT WED AUG 2 2017

MAC013-015-021936-
/O.CAN.KBOX.FF.W.0016.000000T0000Z-170802T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hampshire MA-Hampden MA-
326 PM EDT WED AUG 2 2017

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN HAMPSHIRE AND
NORTHWESTERN HAMPDEN COUNTIES IS CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to avoid any flooded areas until the water 
recedes.

&&

LAT...LON 4240 7284 4225 7277 4215 7301 4221 7302
      4225 7300 4231 7300 4231 7303 4232 7304

$$

JWD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 11:55 AM EDT	Flash Flood Watch	BOX	Essex, Franklin, Hampden, Hampshire, Middlesex, Norfolk and 2 more	8 hr
Aug 2, 1:00 PM EDT	Special Weather Statement	BOX	Worcester	30 min
Aug 2, 2:00 PM EDT	Special Weather Statement	BOX	Norfolk	45 min
Aug 2, 2:05 PM EDT	Flash Flood Warning	BOX	Norfolk	3 hr
Aug 2, 2:12 PM EDT	Special Weather Statement	BOX	Hampshire	33 min
Aug 2, 2:13 PM EDT	Flash Flood Warning	BOX	Franklin, Hampshire	3 hr
Aug 2, 2:16 PM EDT	Special Weather Statement	BOX	Suffolk	29 min
Aug 2, 2:21 PM EDT	Special Marine Warning	BOX		39 min
Aug 2, 2:22 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	38 min
Aug 2, 2:26 PM EDT	Severe Thunderstorm Warning	BOX	Suffolk	34 min
Aug 2, 2:29 PM EDT	Flash Flood Warning	BOX	Suffolk	3 hr
Aug 2, 2:34 PM EDT	Special Weather Statement	BOX	Essex, Middlesex	41 min
Aug 2, 2:37 PM EDT	Special Weather Statement	BOX	Plymouth	38 min
Aug 2, 2:42 PM EDT	Flash Flood Warning	BOX	Middlesex	3 hr
Aug 2, 2:46 PM EDT	Special Marine Warning	BOX		59 min
Aug 2, 2:50 PM EDT	Special Marine Warning	BOX		40 min
Aug 2, 2:52 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex	38 min
Aug 2, 2:57 PM EDT	Special Weather Statement	BOX	Essex	48 min
Aug 2, 3:01 PM EDT	Special Weather Statement	BOX	Worcester	44 min
Aug 2, 3:02 PM EDT	Special Weather Statement	BOX	Hampden	43 min
Aug 2, 3:10 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	50 min
Aug 2, 3:13 PM EDT	Special Weather Statement	BOX	Essex	47 min
Aug 2, 3:29 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	32 min
Aug 2, 3:33 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex	29 min
Aug 2, 3:44 PM EDT	Special Weather Statement	BOX	Middlesex	46 min
Aug 2, 3:50 PM EDT	Special Marine Warning	BOX		55 min
Aug 2, 3:54 PM EDT	Special Weather Statement	BOX	Suffolk	51 min
Aug 2, 4:00 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	45 min
Aug 2, 4:08 PM EDT	Flash Flood Warning	BOX	Middlesex, Worcester	3 hr
Aug 2, 4:11 PM EDT	Special Weather Statement	BOX	Suffolk	49 min
Aug 2, 4:42 PM EDT	Special Marine Warning	BOX		63 min
Aug 2, 4:43 PM EDT	Special Weather Statement	BOX	Suffolk	32 min
Aug 2, 4:48 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	31 min
Aug 2, 4:56 PM EDT	Areal Flood Warning	BOX	Plymouth	2 hr
Aug 2, 5:04 PM EDT	Special Weather Statement	BOX	Suffolk	41 min
Aug 2, 5:09 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Worcester	38 min
Aug 2, 5:17 PM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk, Worcester	118 min
Aug 2, 5:26 PM EDT	Flash Flood Warning	BOX	Suffolk	2 hr
Aug 2, 5:43 PM EDT	Special Marine Warning	BOX		62 min
Aug 2, 6:15 PM EDT	Special Weather Statement	BOX	Norfolk	45 min
Aug 2, 6:36 PM EDT	Special Weather Statement	BOX	Norfolk	39 min
Aug 2, 6:44 PM EDT	Flash Flood Warning	BOX	Norfolk, Suffolk	2 hr

Nearby

Flash Flood Warnings in Massachusetts, 2017 Every flash flood warning in 2017

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.