Alert archive / Illinois / Flash Flood Warnings in 2015

Flash Flood Warning 45, NWS Lincoln, IL

July 1, 2015Clay County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 1, 2015, 9:43 PM CDT for Clay County, Illinois. It was in force for 5 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
Jul 1, 2015, 9:43 PM CDT (02:43 UTC)
Expired
Jul 2, 2015, 2:45 AM CDT
In force
5 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

County Clay County, IL

The radar

The Evansville,IN radar (KVWX), 84 km from the middle of the area, began a volume at 02:42 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

Lincoln, IL (KILX), launched 00:00Z, 2.7 hours before the alert went out and 156 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, Lincoln, IL at 00:00Z on 2015-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 65 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2015-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
65 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
997 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
85 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.

235 
WGUS53 KILX 020243
FFWILX
ILC025-020745-
/O.NEW.KILX.FF.W.0045.150702T0243Z-150702T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
943 PM CDT WED JUL 1 2015

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLAY COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 245 AM CDT
    
* AT 941 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. ONE TO TWO INCHES OF RAIN HAS 
  ALREADY FALLEN...WITH AN ADDITIONAL INCH POSSIBLE OVER THE NEXT 
  HOUR FROM LOUISVILLE TO NEAR FLORA. FLASH FLOODING IS EXPECTED TO 
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  FLORA...LOUISVILLE...CLAY CITY...XENIA...BIBLE GROVE...INGRAHAM...
  IOLA AND SAILOR SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

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

&&

LAT...LON 3861 8870 3882 8869 3890 8836 3886 8836
      3885 8833 3875 8828 3860 8830

$$

SMITH
1 follow-up statement
916 
WGUS73 KILX 020442
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1142 PM CDT WED JUL 1 2015

ILC025-020745-
/O.CON.KILX.FF.W.0045.000000T0000Z-150702T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLAY-
1142 PM CDT WED JUL 1 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM CDT FOR
CLAY COUNTY...

AT 1137 PM CDT...TRAINED WEATHER SPOTTERS REPORTED EXTENSIVE 
SECONDARY ROAD FLOODING WITH WATER OVER HIGHWAY 45 SOUTH OF 
FLORA. ALTHOUGH THE RAINFALL RATES HAVE DECREASED CONSIDERABLY
ACROSS THE AREA FROM A FEW HOURS AGO...ADDITIONAL RAINFALL
CONTINUES TO FALL OVER CLAY COUNTY AND THE FLASH FLOOD THREAT
CONTINUES.  

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
FLORA...LOUISVILLE...CLAY CITY...XENIA...BIBLE GROVE...INGRAHAM...
IOLA AND SAILOR SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3861 8870 3882 8869 3890 8836 3886 8836
      3885 8833 3875 8828 3860 8830

$$

SMITH

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 1, 7:56 PM CDTSpecial Weather StatementILXClay64 min
Jul 1, 8:14 PM CDTSpecial Weather StatementILXLawrence31 min
Jul 1, 8:26 PM CDTFlash Flood WarningILXClay, Effingham6 hr
Jul 1, 8:39 PM CDTSpecial Weather StatementILXClay36 min
Jul 1, 8:48 PM CDTSevere Thunderstorm WarningILXClay27 min

Nearby

Flash Flood Warnings in Illinois, 2015Every flash flood warning in 2015

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.