Alert archive / New Hampshire / Flash Flood Warnings in 2014

Flash Flood Warning 22, NWS Boston/Norton, MA

July 15, 2014Cheshire County, Hillsborough County, New Hampshire

NWS Boston/Norton, MA issued this flash flood warning at Jul 15, 2014, 10:20 PM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 3 hr. 3 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
Jul 15, 2014, 10:20 PM EDT (02:20 UTC)
Expired
Jul 16, 2014, 1:15 AM EDT
In force
3 hr
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

Counties Cheshire County, NH, Hillsborough County, NH

The radar

The Boston radar (KBOX), 146 km from the middle of the area, began a volume at 02:19 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

TimeReportWhereRemark
Jul 15, 10:50 PM EDTFLASH FLOODKeene, NHWOODLAND AVE FLOODED AND IMPASSABLE WITH FLOODING EXTENDING INTO A HOME.
Jul 15, 11:03 PM EDTFLASH FLOODKeene, NHWOODLAND AVE FLOODED
Jul 16, 12:34 AM EDTFLASH FLOODNorth Weare, NHROAD WASHOUTS ON HODGEN ROAD AND CENTER ROAD. ABIJAH ROAD FLOODED OUT. 2.95 INCHES OF RAIN.

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, 2.3 hours before the alert went out and 141 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 2014-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 504 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2014-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.1939587897Sfc1 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
504 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
913 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

607 
WGUS51 KBOX 160220
FFWBOX
NHC005-011-160515-
/O.NEW.KBOX.FF.W.0022.140716T0220Z-140716T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1020 PM EDT TUE JUL 15 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN HILLSBOROUGH COUNTY IN SOUTHERN NEW HAMPSHIRE...
  CHESHIRE COUNTY IN SOUTHERN NEW HAMPSHIRE...

* UNTIL 115 AM EDT

* AT 1019 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. AROUND TWO INCHES OF RAIN HAS 
  BEEN ESTIMATED TO HAVE ALREADY FALLEN ACROSS THE WARNED AREA. 
  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  KEENE...JAFFREY...WEARE...SWANZEY...PETERBOROUGH...RINDGE...
  HILLSBOROUGH...NEW BOSTON...HINSDALE...WALPOLE...CHESTERFIELD...
  ANTRIM...MARLBOROUGH...FITZWILLIAM...TROY...ALSTEAD...DEERING...
  WESTMORELAND...GREENFIELD...LYNDEBOROUGH...HANCOCK...DUBLIN...
  FRANCESTOWN...BENNINGTON...TEMPLE...STODDARD...RICHMOND...
  HARRISVILLE...GILSUM AND MARLOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAPID AND POTENTIALLY LIFE THREATENING FLOODING OF SMALL STREAMS AND 
ROADWAYS IS IMMINENT. HEAD TO HIGHER GROUND IMMEDIATELY...ESPECIALLY 
AS FLOODING IS DIFFICULT TO SEE AT NIGHT. DO NOT DRIVE THROUGH 
FLOODED ROADS. FIND ALTERNATE ROUTES. MOST FLOOD DEATHS OCCUR IN 
VEHICLES. TURN AROUND...DONT DROWN.

A FLASH FLOOD WARNING IS ISSUED FOR RAPID AND POTENTIALLY LIFE 
THREATENING FLOODING. IN URBAN AREAS AVOID FLOODED ROADS AND OBEY 
ROAD CLOSURES. THOSE NEAR SMALL STREAMS MUST HEAD FOR HIGHER GROUND 
IMMEDIATELY.

&&

LAT...LON 4312 7185 4314 7166 4310 7165 4280 7191
      4272 7212 4272 7222 4290 7218 4291 7241
      4282 7254 4295 7254 4300 7245 4316 7245
      4313 7243 4313 7237 4316 7237 4318 7216
      4313 7218 4313 7204 4318 7204 4321 7191

$$

SIPPRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 8:21 PM EDTSpecial Weather StatementBOXCheshire39 min
Jul 15, 8:48 PM EDTSpecial Weather StatementBOXHillsborough57 min
Jul 15, 9:56 PM EDTFlash Flood WarningBOXCheshire3 hr
Jul 15, 11:14 PM EDTSpecial Weather StatementBOXHillsborough61 min

Nearby

Flash Flood Warnings in New Hampshire, 2014Every 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.