Alert archive / Illinois / Flash Flood Warnings in 2015

Flash Flood Warning 76, NWS St. Louis, MO

July 27, 2015Calhoun County, Pike County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jul 27, 2015, 7:49 PM CDT for Calhoun County, Pike 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 27, 2015, 7:49 PM CDT (00:49 UTC)
Expired
Jul 28, 2015, 12:45 AM CDT
In force
5 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Calhoun County, IL, Pike County, IL

The radar

The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 00:52 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, 0.8 hours before the alert went out and 206 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 2015-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 372 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 2015-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939Sfc1 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
372 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1155 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

932 
WGUS53 KLSX 280049
FFWLSX
ILC013-149-280545-
/O.NEW.KLSX.FF.W.0076.150728T0049Z-150728T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
749 PM CDT MON JUL 27 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  NORTHWESTERN CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS...

* UNTIL 1245 AM CDT
    
* AT 748 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO ONE AND A HALF INCHES OF 
  RAIN HAS ALREADY FALLEN IN 30 MINUTES OR LESS. FLASH FLOODING IS 
  EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  PITTSFIELD...BARRY...GRIGGSVILLE...PLEASANT HILL...ATLAS...
  CLARKSVILLE...PIKE...BELLEVIEW...INDEPENDENCE...BEDFORD...
  MONTEZUMA...HULL...MARTINSBURG...NEW CANTON...NEBO...KAMPSVILLE...
  MILTON...KINDERHOOK...BAYLIS AND PEARL.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE 
WARNED AREA.

THIS INCLUDES INTERSTATE 72 BETWEEN EXITS 10 AND 35.
 
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 3969 9065 3964 9061 3954 9057 3943 9062
      3935 9062 3924 9060 3923 9072 3925 9073
      3932 9080 3941 9097 3948 9106 3954 9110
      3955 9115 3957 9117 3960 9118 3962 9122
      3975 9137 3976 9061

$$

TILLY
1 follow-up statement
884 
WGUS73 KLSX 280516
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1216 AM CDT TUE JUL 28 2015

ILC013-149-280526-
/O.CAN.KLSX.FF.W.0076.000000T0000Z-150728T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIKE IL-CALHOUN IL-
1216 AM CDT TUE JUL 28 2015

...THE FLASH FLOOD WARNING FOR PIKE COUNTY IN WEST CENTRAL ILLINOIS
AND NORTHWESTERN CALHOUN COUNTIES IN SOUTHWESTERN ILLINOIS IS
CANCELLED...

FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES.

LAT...LON 3969 9065 3964 9061 3954 9057 3943 9062
      3935 9062 3924 9060 3923 9072 3925 9073
      3932 9080 3941 9097 3948 9106 3954 9110
      3955 9115 3957 9117 3960 9118 3962 9122
      3975 9137 3976 9061

$$

TILLY

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.