Alert archive / Massachusetts / Flash Flood Warnings in 1998

Flash Flood Warning 29, NWS Boston/Norton, MA

June 13, 1998Worcester County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jun 13, 1998, 9:45 PM EDT for Worcester County, Massachusetts. It was in force for 22 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
Jun 13, 1998, 9:45 PM EDT (01:45 UTC)
Expired
Jun 14, 1998, 8:00 PM EDT
In force
22 hr
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Worcester County, MA

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 1.8 hours before the alert went out and 162 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 1998-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 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 1998-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
2 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
427 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 9:45 PM EDTFlash Flood WarningBOXEssex, Middlesex, Norfolk, Suffolk22 hr
Jun 13, 9:45 PM EDTFlash Flood WarningBOXBristol22 hr
Jun 14, 6:03 AM EDTFlash Flood WarningBOXBristol14 hr
Jun 14, 3:10 PM EDTFlash Flood WarningBOXEssex, Middlesex, Norfolk, Suffolk20 hr
Jun 14, 3:10 PM EDTFlash Flood WarningBOXWorcester20 hr
Jun 14, 3:10 PM EDTFlash Flood WarningBOXBristol20 hr

Nearby

Flash Flood Warnings in Massachusetts, 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.