Alert archive / Illinois / Flash Flood Warnings in 2019

Flash Flood Warning 39, NWS Lincoln, IL

August 18, 2019Edgar County, Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 18, 2019, 5:40 PM CDT for Edgar County, Illinois. It was in force for 3 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
Aug 18, 2019, 5:40 PM CDT (22:40 UTC)
Expired
Aug 18, 2019, 8:45 PM CDT
In force
3 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

County Edgar County, IL

The radar

The Indianapolis radar (KIND), 113 km from the middle of the area, began a volume at 22:41 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 12:00Z, 10.7 hours before the alert went out and 92 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 12:00Z on 2019-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1407 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 12:00Z on 2019-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.1939587897Sfc1 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
1407 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1396 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

591 
WGUS53 KILX 182240
FFWILX
ILC045-190145-
/O.NEW.KILX.FF.W.0039.190818T2240Z-190819T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
540 PM CDT Sun Aug 18 2019

The National Weather Service in Lincoln has issued a

* Flash Flood Warning for...
  Northeastern Edgar County in east central Illinois...

* Until 845 PM CDT.

* At 540 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Chrisman and Scottland. 

Additional rainfall amounts of up to an inch are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3976 8753 3977 8772 3988 8774 3988 8762
      3987 8761 3987 8757 3988 8757 3988 8754
      3983 8753

$$

37
1 follow-up statement
654 
WGUS73 KILX 190010
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
710 PM CDT Sun Aug 18 2019

ILC045-190145-
/O.CON.KILX.FF.W.0039.000000T0000Z-190819T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Edgar-
710 PM CDT Sun Aug 18 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
NORTHEASTERN EDGAR COUNTY...

At 709 PM CDT, Doppler radar indicated rainfall of up to three 
inches has fallen in the warned area. Flash flooding is expected to 
begin continue this evening.

Some locations that will experience flooding include...
Chrisman and Scottland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3976 8753 3977 8772 3984 8773 3988 8762
      3987 8761 3987 8757 3988 8757 3988 8754
      3983 8753

$$

37

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 7:57 PM CDTSpecial Weather StatementILXClay48 min
Aug 17, 8:06 PM CDTSevere Thunderstorm WarningILXClay39 min
Aug 17, 8:48 PM CDTSpecial Weather StatementILXEffingham42 min
Aug 17, 9:28 PM CDTSpecial Weather StatementILXClark32 min
Aug 17, 9:33 PM CDTSevere Thunderstorm WarningILXClark28 min
Aug 18, 3:41 PM CDTSpecial Weather StatementILXVermilion64 min
Aug 18, 3:47 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion58 min
Aug 18, 5:03 PM CDTFlash Flood WarningILXVermilion3 hr
Aug 18, 5:08 PM CDTSevere Thunderstorm WarningILXEdgar54 min

Nearby

Flash Flood Warnings in Illinois, 2019Every flash flood warning in 2019

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.