Alert archive / Illinois / Flash Flood Warnings in 2000

Flash Flood Warning 22, NWS Quad Cities, IA

July 11, 2000Hancock County, Illinois

NWS Quad Cities, IA issued this flash flood warning at Jul 11, 2000, 5:00 AM CDT for Hancock County, Illinois. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jul 11, 2000, 5:00 AM CDT (10:00 UTC)
Expired
Jul 11, 2000, 7:00 AM CDT
In force
2 hr
Issued by
NWS Quad Cities, IA
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Hancock County, IL

The radar

The Quad Cities radar (KDVN), 151 km from the middle of the area, began a volume at 10:00 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

Davenport, (KDVN), launched 00:00Z, 10.0 hours before the alert went out and 154 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, Davenport, at 00:00Z on 2000-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4807 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, Davenport, at 00:00Z on 2000-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 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
4807 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
847 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
279 m²/s²
Significant tornado parameter
3.6
Supercell composite
17.8

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDVN 111007
FFWDVN
ILC067-111200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
500 AM CDT TUE JUL 11 2000

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN HANCOCK COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 700 AM CDT

* AT 502 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  MODERATE RAIN CONTINUED TO FALL OVER THE WARNED AREA. DOPPLER RADAR
  ESTIMATES THAT OVER 4 INCHES OF RAIN HAS FALLEN IN PARTS OF SOUTHWEST
  HANCOCK COUNTY BETWEEN WARSAW AND MALLARD.

* THE GROUND HAS ALREADY BEEN SATURATED BY RAINFALL IN THE LAST 4 HOURS...
  ADDITIONAL RAINFALL IN THE NEXT 1 TO 2 HOURS WILL PROLONG THE FLASH FLOOD
  THREAT FOR SOUTHERN HANCOCK COUNTY.

ADDITIONAL RUNOFF WILL LIKELY CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS
...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG
THE BA$NKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO
FLASH FLOODING.

LAT...LON 4042 9109 4023 9091 4023 9145 4037 9143

CROSBIE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 12:11 AM CDTFlash Flood WarningDVNHancock, McDonough5 hr

Nearby

Flash Flood Warnings in Illinois, 2000Every flash flood warning in 2000

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.