Alert archive / Illinois / Flash Flood Warnings in 2008

Flash Flood Warning 49, NWS Quad Cities, IA

June 18, 2008Hancock County, Illinois

NWS Quad Cities, IA issued this flash flood warning at Jun 18, 2008, 1:59 AM CDT for Hancock County, Illinois. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 18, 2008, 1:59 AM CDT (06:59 UTC)
Expired
Jun 18, 2008, 8:00 AM CDT
In force
6 hr
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Flood severity
Major

County Hancock County, IL

The radar

The Quad Cities radar (KDVN), 165 km from the middle of the area, began a volume at 07:02 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, 7.0 hours before the alert went out and 169 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 2008-06-18Temperature 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, Davenport, at 00:00Z on 2008-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 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
2 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
2282 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
48 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDVN 180700
FFWDVN
ILC067-181300-
/O.NEW.KDVN.FF.W.0049.080618T0659Z-080618T1300Z/
/00000.3.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
159 AM CDT WED JUN 18 2008

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR A LEVEE FAILURE IN...
  SOUTHWESTERN HANCOCK COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 800 AM CDT

* AT 140 AM CDT...A LEVEE ON THE MISSISSIPPI RIVER NEAR MEYER FAILED 
AND IS CAUSING FLASH FLOODING OF THE SURROUNDING AREAS.

* AFFECTED LOCATIONS INCLUDE WARSAW AND WARSAW BOTTOMS...AREAS BELOW 
THE BLUFF ALONG THE MISSISSIPPI RIVER IN SOUTHWESTERN HANCOCK COUNTY.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO 
HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO
FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4029 9149 4036 9145 4036 9143 4020 9142
      4020 9150

$$

WOLF
2 follow-up statements
000 
WGUS73 KDVN 180901
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
357 AM CDT WED JUN 18 2008

ILC067-181300-
/O.CON.KDVN.FF.W.0049.000000T0000Z-080618T1300Z/
/00000.3.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HANCOCK IL-
357 AM CDT WED JUN 18 2008

...A FLASH FLOOD WARNING FOR A LEVEE FAILURE REMAINS IN EFFECT UNTIL
800 AM CDT FOR SOUTHWESTERN HANCOCK COUNTY...

AT 357 AM CDT...WATER CONTINUED FLOODING WARSAW BOTTOMS IN 
SOUTHWESTERN HANCOCK COUNTY.  THE HANCOCK COUNTY SHERIFF IS 
REQUIRING EVACUATION OF THE BOTTOMS AS THE ENTIRE AREA WILL FLOOD 
TODAY.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. 

LAT...LON 4029 9149 4036 9145 4036 9143 4020 9142
      4020 9150

$$

WOLF
000 
WGUS73 KDVN 181307
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
800 AM CDT WED JUN 18 2008

ILC067-181310-
/O.EXP.KDVN.FF.W.0049.000000T0000Z-080618T1300Z/
/00000.3.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HANCOCK IL-
800 AM CDT WED JUN 18 2008

...THE FLASH FLOOD WARNING FOR A LEVEE FAILURE HAS EXPIRED FOR
SOUTHWESTERN HANCOCK COUNTY...

ALTHOUGH THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHWESTERN 
HANCOCK COUNTY...WATER WILL CONTINUE RISING DUE TO LEVEE BREACHES OR 
OVERTOPPING IN ADAMS COUNTY NEAR MEYER.  EVACUATION OF WARSAW 
BOTTOMS SHOULD CONTINUE AS THE FLOODING WILL PERSIST THROUGH THE 
DAY.

LAT...LON 4029 9149 4036 9145 4036 9143 4020 9142
      4020 9150

$$

WOLF

Nearby

Flash Flood Warnings in Illinois, 2008Every flash flood warning in 2008

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.