Alert archive / Illinois / Flash Flood Warnings in 2017

Flash Flood Warning 14, NWS Lincoln, IL

May 6, 2017Crawford County, Illinois

NWS Lincoln, IL issued this flash flood warning at May 6, 2017, 2:32 PM CDT for Crawford County, Illinois. It was in force for 24 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
May 6, 2017, 2:32 PM CDT (19:32 UTC)
Expired
May 7, 2017, 2:30 PM CDT
In force
24 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

County Crawford County, IL

The radar

The Evansville,IN radar (KVWX), 72 km from the middle of the area, began a volume at 19:34 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, 7.5 hours before the alert went out and 152 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 2017-05-06Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2017-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 259 square meters per square second.1939587897117136Sfc1 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
960 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
259 m²/s²
0-3 km storm-relative helicity
526 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

526 
WGUS53 KILX 061932
FFWILX
ILC033-070330-
/O.NEW.KILX.FF.W.0014.170506T1932Z-170507T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
232 PM CDT SAT MAY 6 2017

The National Weather Service in Lincoln has issued a

* Flash Flood Warning for...
  Southwestern Crawford County in east central Illinois...

* Until 1030 PM CDT Saturday

* At 229 PM CDT, trained weather spotters reported the Green Brier 
  Levee, which is 6 miles south of Oblong, has breached. Flash 
  flooding should already be occurring.

* Flash flooding will remain over mainly rural areas of southwestern
  Crawford County into tonight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Stay away or be swept away. River banks and culverts can become
unstable and unsafe. 

&&

LAT...LON 3891 8795 3891 8787 3885 8787 3885 8795

$$

Smith
3 follow-up statements
293 
WGUS53 KILX 070308
FFWILX
ILC033-071130-
/O.EXT.KILX.FF.W.0014.000000T0000Z-170507T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
1008 PM CDT SAT MAY 6 2017

The National Weather Service in Lincoln has extended the

* Flash Flood Warning for...
  Southwestern Crawford County in east central Illinois...

* Until 630 AM CDT Sunday

* At 800 PM CDT, trained weather spotters reported the Green Brier 
  Levee, which is 6 miles south of Oblong, was being overtopped in 
  at least three locations. Continued overtopping or a failure of 
  the levee will cause flash flooding of surrounding areas.


* Flash flooding will remain over mainly rural areas of southwestern
  Crawford County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Stay away or be swept away. River banks and culverts can become
unstable and unsafe.

&&

LAT...LON 3891 8795 3891 8787 3885 8787 3885 8795

$$

Bak
754 
WGUS53 KILX 071121
FFWILX
ILC033-071930-
/O.EXT.KILX.FF.W.0014.000000T0000Z-170507T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
621 AM CDT SUN MAY 7 2017

The National Weather Service in Lincoln has extended the

* Flash Flood Warning for...
  Southwestern Crawford County in east central Illinois...

* Until 230 PM CDT Sunday

* At 617 AM CDT, trained weather spotters the Green Brier levee on 
  the Embarras River, 6 miles south of Oblong, was being overtopped 
  in at least 3 locations. Continued overtopping or a failure of the 
  levee will cause flash flooding of surrounding areas.

* Flash flooding will remain over mainly rural areas of southwestern
  Crawford County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from the levee failure will cause flooding of 
country roads, farmland, and other low lying spots.

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents should take immediate precautions to protect life and 
property.

&&

LAT...LON 3891 8795 3891 8787 3885 8787 3885 8795

$$

37
978 
WGUS73 KILX 071927
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
227 PM CDT SUN MAY 7 2017

ILC033-071933-
/O.EXP.KILX.FF.W.0014.000000T0000Z-170507T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAWFORD-
227 PM CDT SUN MAY 7 2017

...THE FLASH FLOOD WARNING WILL EXPIRE AT 230 PM CDT FOR SOUTHWESTERN
CRAWFORD COUNTY...

At 220 pm CDT...A trained weather spotter reported the water was 
receding this afternoon across the warned area...and is no longer 
expected to pose a significant threat. Please continue to heed all 
road closures. 

LAT...LON 3891 8795 3891 8787 3885 8787 3885 8795

$$

Smith

Nearby

Flash Flood Warnings in Illinois, 2017Every flash flood warning in 2017

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.