Alert archive / Iowa / Flash Flood Warnings in 1990

Flash Flood Warning 4, NWS Quad Cities, IA

June 16, 1990Jones County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Jun 16, 1990, 10:35 AM CDT for Jones County, Iowa. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 16, 1990, 10:35 AM CDT (15:35 UTC)
Expired
Jun 16, 1990, 2:30 PM CDT
In force
4 hr
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Jones County, IA

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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 3.6 hours before the alert went out and 359 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, Green Bay/Straub, WI at 12:00Z on 1990-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 12:00Z on 1990-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 158 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1259 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
158 m²/s²
0-3 km storm-relative helicity
170 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.

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, Jun 16, 7:39 AM CDT, 2 hours 56 minutes before
ILZ004-IAZ015-161330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
740 AM CDT SAT JUN 16 1990

...SEVERE THUNDERSTORM WATCH FOR SOUTHEAST IOWA UNTIL 11 AM CDT...

STRONG THUNDERSTORMS WITH HEAVY RAIN AND SMALL HAIL CONTINUE TO TRACK
ACROSS EXTREME EAST CENTRAL IOWA.

AT 730 AM CDT...RADAR SHOWED STRONG THUNDERSTORMS OVER WESTERN SCOTT
AND EASTERN MUSCATINE COUNTIES IN EAST CENTRAL IOWA...20 MILES NORTH
OF MOLINE NEAR DONAHUE TO 20 WEST OF MOLINE AROUND MUSCATINE.

THESE THUNDERSTORMS HAVE PRODUCED VERY HEAVY RAIN AND LOCALIZED
FLOODING HAS BEEN REPORTED AROUND WILTON IN NORTHERN MUSCATINE COUNTY.

THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR AND WILL
MOVE THROUGH SCOTT COUNTY IOWA BETWEEN 745 AM AND 845 AM CDT.
FOBERT

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 16, 7:52 AM CDTFlash Flood WarningDVNCedar, Clinton, Muscatine, Scott4 hr
Jun 16, 11:52 AM CDTFlash Flood WarningDVNClinton4 hr
Jun 16, 11:52 AM CDTFlash Flood WarningDVNCedar, Scott4 hr
Jun 16, 1:28 PM CDTFlash Flood WarningDVNJones4 hr
Jun 16, 4:03 PM CDTFlash Flood WarningDVNCedar, Muscatine, Scott3 hr
Jun 16, 4:03 PM CDTFlash Flood WarningDVNClinton3 hr

Nearby

Flash Flood Warnings in Iowa, 1990Every flash flood warning in 1990

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.