Alert archive / New Hampshire / Flash Flood Warnings in 1998
Flash Flood Warning 61, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Jul 17, 1998, 4:26 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
- Jul 17, 1998, 4:26 PM EDT (20:26 UTC)
- Expired
- Jul 17, 1998, 7:25 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 20:46 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 12:00Z, 8.4 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.
- Mixed-layer CAPE
- 542 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 712 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBOS 172025 FFWBOS NHC005-172325- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TAUNTON MA 426 PM EDT FRI JUL 17 1998 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN CHESHIRE COUNTY IN SOUTHWESTERN NEW HAMPSHIRE * UNTIL 725 PM EDT * AT 420 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN OVER WESTMORELAND AND WALPOLE...MOVING SLOWLY NORTHEAST. * IN WALPOLE...RADAR INDICATED BETWEEN 3.5 AND 4 INCHES OF RAIN HAD FALLEN SINCE 130 PM. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO RIVERS AND STREAM. EVEN THE SMALLEST STREAMS CAN BECOME KILLERS IN TORRENTIAL RAINS. JN/WTB
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 17, 12:50 PM EDT, 3 hours 36 minutes before
MAZ002>006-008>012-CTZ002>004-NHZ011>012-180200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE BOSTON MA 1250 PM EDT FRI JUL 17 1998 ...A FEW STRONG THUNDERSTORMS ARE POSSIBLE IN SOUTHERN NEW ENGLAND THIS AFTERNOON AND EVENING... SCATTERED THUNDERSTORMS THIS AFTERNOON AND EVENING WILL LIKELY CONTAIN VERY HEAVY DOWNPOURS WITH STREET FLOODING A POSSIBILITY. A FEW THUNDERSTORMS MAY ALSO CONTAIN LOCALLY STRONG WINDS AND HAIL. THE THUNDERSTORMS SHOULD BE MOST NUMEROUS BETWEEN 4 PM AND 8 PM. THE AREAS MOST SUSCEPTIBLE TO SEVERE THUNDERSTORMS EXTENDS FROM PROVIDENCE RHODE ISLAND NORTHEAST TO BOSTON AND ALL POINTS NORTH AND WEST. A COLD FRONT MOVING INTO THE WARM HUMID AIR MASS OVER NEW ENGLAND IS RESPONSIBLE FOR THE THUNDERSTORMS. BESIDES THE POTENTIAL RISK FROM TORRENTIAL DOWNPOURS...DAMAGING WIND GUSTS AND HAIL...OUTDOOR ENTHUSIASTS SHOULD BE READY TO SEEK SHELTER FROM LIGHTNING IF A STORM IS SIGHTED. SKYWARN AMATEUR RADIO OPERATORS ARE REQUESTED TO BE PREPARED FOR POSSIBLE ACTIVATION THIS AFTERNOON. STAY TUNED TO NOAA WEATHER RADIO AND YOUR LOCAL MEDIA FOR ANY ADDITIONAL STATEMENTS...WATCHES AND WARNINGS. LJC/JN
Nearby
Flash Flood Warnings in New Hampshire, 1998Every flash flood warning in 1998
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.