Alert archive / New Hampshire / Flash Flood Warnings in 2003

Flash Flood Warning 2, NWS Boston/Norton, MA

August 6, 2003Cheshire County, New Hampshire

NWS Boston/Norton, MA issued this flash flood warning at Aug 6, 2003, 5:19 PM EDT for Cheshire County, New Hampshire. It was in force for 116 min. 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 6, 2003, 5:19 PM EDT (21:19 UTC)
Expired: Aug 6, 2003, 7:15 PM EDT
In force: 116 min
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 21:19 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.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.3 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-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: 287 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 26 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 062120
FFWBOX
NHC005-062315-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
519 PM EDT WED AUG 6 2003

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

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

* UNTIL 715 PM EDT.

* AT 514 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH TORRENTIAL RAINFALL OVER SURRY...OR ABOUT 7
  MILES NORTHWEST OF KEENE...MOVING NORTHEAST AT 10 MPH.

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

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO RIVERS AND STREAMS. EVEN
THE SMALLEST STREAMS CAN BECOME KILLERS IN TORRENTIAL RAINS.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER ATTEMPT TO CROSS
BRIDGES OR ROADS WHERE WATER COVERS THE ROADWAY. IT ONLY TAKES A FOOT
OR TWO OF WATER TO WASH MOST CARS AWAY.

$$

LAT...LON 4301 7252 4280 7256 4318 7213 4317 7240

FRANK

1 follow-up statement

000 
WGUS71 KBOX 062156
FFSBOX
NHC005-062315-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
553 PM EDT WED AUG 6 2003

...A FLASH FLOOD WARNING CONTINUES FOR NORTHWEST CHESHIRE COUNTY 
UNTIL 715 PM...

TORRENTIAL RAINFALL CONTINUED TO FALL OVER NORTHWEST CHESHIRE 
COUNTY.  DOPPLER RADAR ESTIMATATES THAT SOME LOCATIONS HAVE RECEIVED 
1 INCH IN OF RAIN IN JUST 15 MINUTES...WITH 3 TO 4 INCHES IN ONE 
HOUR.  THIS WAS AROUND THE WEST MORELAND AND JUST NORTH OF THE 
CHESTERFIELD AREAS.  THE VERY HEAVY RAINFALL CONTINUED TO TRAIN OVER 
THE AREA.

IF YOU LIVE ALONG A FLOOD PRONE STREAM NOW IS THE TIME TO TAKE ACTION
TO PROTECT LIFE AND PROPERTY. RAPID RISES ON SMALL RIVERS AND STREAMS
CAN FLOOD HOMES...BUSINESSES AND ROADWAYS WITHOUT WARNING.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER ATTEMPT TO CROSS
BRIDGES OR ROADS WHERE WATER COVERS THE ROADWAY. IT ONLY TAKES A FOOT
OR TWO OF WATER TO WASH MOST CARS AWAY.

THE HEAVY RAINFALL AND SLOW MOVEMENT OF THESE STORMS MAY RESULT IN
FLOODING OF ROAD INTERSECTIONS AND LOW LYING AREAS INCLUDING TUNNELS.
KNOW ALTERNATE ROUTES FOR TRAVEL IN CASE ROADS BECOME IMPASSABLE.

$$

FRANK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 6:58 PM EDT	Flash Flood Warning	BOX	Cheshire	2 hr

Nearby

Flash Flood Warnings in New Hampshire, 2003 Every 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.