Alert archive / Wisconsin / Flash Flood Warnings in 1986

Flash Flood Warning 2, NWS Twin Cities, MN

September 21, 1986Pierce County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Sep 21, 1986, 10:50 PM CDT for Pierce County, Wisconsin. It was in force for 85 min.

The area

The counties it named.

The facts

Issued
Sep 21, 1986, 10:50 PM CDT (03:50 UTC)
Expired
Sep 22, 1986, 12:15 AM CDT
In force
85 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Pierce County, WI

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 3.8 hours before the alert went out and 94 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, Minneapolis, MN at 00:00Z on 1986-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 50 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, Minneapolis, MN at 00:00Z on 1986-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 412 square meters per square second.19395878Sfc1 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
50 J/kg
Mixed-layer CIN
-279 J/kg
Mixed-layer LCL
631 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
412 m²/s²
0-3 km storm-relative helicity
503 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 220355 COR
FFWMSP
WIC093-220445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING......CORRECTED
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
1050 PM CDT SUN SEP 21 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 7 AM CDT MONDAY FOR PEOPLE IN THE FOLLOWING COUNTY OF

WEST CENTRAL WISCONSIN...PIERCE

AT 1030 PM CDT..THE PIERCE COUNTY SHERIFF'S OFFICE REPORTED
THAT THE DAM LOCATED WITH THE CITY LIMITS OF SPRING VALLEY
WISCONSIN WAS THREATENED BY THE RISING WATER OF THE EAU GALLE
RIVER. FLOODING WAS REPORTED ON SMALL STREAMS UP RIVER FROM THE
DAM AND TRIBUTARIES OF THE EAU GALLE RIVER.

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINE^NT/HAS BEEN REPORTED.
TAKE NECESSARY PRECAUTION  IMMEDIATELY.
 PERSONS IN THE TOWN OF SPRING VALLEY IN WEST CENTRAL WISCONSIN
 SHOULD BE PREPARED TO MOVE TO HIGHER GROUND IMMEDIATELY.

JHM

Nearby

Flash Flood Warnings in Wisconsin, 1986Every flash flood warning in 1986

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.