Alert archive / Massachusetts / Flash Flood Warnings in 2018

Flash Flood Warning 1, NWS Boston/Norton, MA

January 13, 2018Hampden County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jan 13, 2018, 12:44 AM EST for Hampden 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
Jan 13, 2018, 12:44 AM EST (05:44 UTC)
Expired
Jan 13, 2018, 3:45 AM EST
In force
3 hr
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

County Hampden County, MA

The radar

The Albany radar (KENX), 124 km from the middle of the area, began a volume at 05:46 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 00:00Z, 5.7 hours before the alert went out and 113 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-pSkew-T log-p diagram, Albany, NY at 00:00Z on 2018-01-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2018-01-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
631 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

976 
WGUS51 KBOX 130544
FFWBOX
MAC013-130845-
/O.NEW.KBOX.FF.W.0001.180113T0544Z-180113T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Taunton MA
1244 AM EST SAT JAN 13 2018

The National Weather Service in Taunton has issued a

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

* Until 345 AM EST

* At 1242 AM EST, an ice jam along the Westfield River was causing a 
  rapid rise in water level in Westfield, near Springfield Road in 
  the Frogs Hole area. Those in low lying sections along the river 
  through Westfield should take action to protect materials that are 
  in flood prone areas at stages around 13.50 feet. Localized 
  flooding in the Frogs Hole area is expected.

* Some locations that will experience flooding include...
  Westfield.

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. 

&&

LAT...LON 4211 7269 4210 7269 4210 7272 4212 7272
      4211 7270

$$

JWD

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 12, 7:30 PM ESTAreal Flood WarningBOXBristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk6 hr
Jan 12, 11:19 PM ESTAreal Flood WarningBOXFranklin, Hampden, Hampshire, Middlesex, Worcester6 hr
Jan 13, 1:06 AM ESTAreal Flood WarningBOXBristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk6 hr
Jan 13, 5:15 AM ESTAreal Flood WarningBOXFranklin, Worcester2 hr
Jan 13, 5:24 AM ESTRiver Flood WarningBOXBristol, Plymouth4 days
Jan 13, 7:02 AM ESTAreal Flood WarningBOXBristol, Norfolk, Plymouth4 hr
Jan 13, 10:19 AM ESTAreal Flood WarningBOXWorcester3 hr
Jan 13, 10:45 AM ESTAreal Flood WarningBOXHampshire3 hr
Jan 13, 11:44 AM ESTAreal Flood WarningBOXFranklin, Worcester4 hr

Nearby

Flash Flood Warnings in Massachusetts, 2018Every flash flood warning in 2018

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.