Alert archive / New Hampshire / Flash Flood Warnings in 2003

Flash Flood Warning 12, NWS Boston/Norton, MA

August 13, 2003Cheshire County, New Hampshire

NWS Boston/Norton, MA issued this flash flood warning at Aug 13, 2003, 1:53 PM EDT for Cheshire County, New Hampshire. 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 counties it named.

The facts

Issued
Aug 13, 2003, 1:53 PM EDT (17:53 UTC)
Expired
Aug 13, 2003, 4:45 PM EDT
In force
3 hr
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Cheshire County, NH

The radar

The Boston radar (KBOX), 141 km from the middle of the area, began a volume at 17:56 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, 5.9 hours before the alert went out and 131 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 12:00Z on 2003-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 878 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 12:00Z on 2003-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.193958Sfc1 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
878 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
584 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KBOX 131754
FFWBOX
NHC005-132045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
153 PM EDT WED AUG 13 2003

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN CHESHIRE COUNTY IN SOUTHERN NEW HAMPSHIRE
    INCLUDING KEENE

* UNTIL 445 PM EDT.

* AT 145 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH TORRENTIAL RAINFALL OVER WESTERN CHESHIRE       
  COUNTY.  THE STORMS WERE MOVING EAST AT AROUND 10 MPH.

OTHER COMMUNITIES IN DANGER OF IMMINENT FLASH FLOODING INCLUDE 
WALPOLE...WESTMORELAND...SURRY...CHESTERFIELD...AND GILSUM.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.

$$

LAT...LON 4314 7251 4297 7256 4276 7218 4315 7215

THOMPSON
1 follow-up statement
000 
WGUS71 KBOX 132004
FFSBOX
NHC005-132100-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
400 PM EDT WED AUG 13 2003

...THE FLASH FLOOD WARNING FOR WESTERN CHESHIRE COUNTY HAS BEEN 
CANCELED...

THE THUNDERSTORMS WHICH PRODUCED LOCALLY HEAVY RAINFALL EARLIER THIS 
AFTERNOON HAVE MOVED OUT OF CHESHIRE COUNTY. AS A RESULT...THE FLASH 
FLOOD WARNING FOR WESTERN CHESHIRE COUNTY HAS BEEN CANCELED. SOME 
PONDING OF WATER IN LOW LYING AND POOR DRAINAGE AREAS MAY PERSIST 
INTO EARLY EVENING AS A RESULT OF THE EARLIER HEAVY RAIN EVENT.  

$$

BELK

Nearby

Flash Flood Warnings in New Hampshire, 2003Every flash flood warning in 2003

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.