Alert archive / Illinois / Flash Flood Warnings in 2015

Flash Flood Warning 55, NWS St. Louis, MO

July 19, 2015Greene County, Jersey County, Macoupin County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jul 19, 2015, 1:57 AM CDT for Greene County, Jersey County, Macoupin County, Illinois. It was in force for 6 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 19, 2015, 1:57 AM CDT (06:57 UTC)
Expired: Jul 19, 2015, 8:00 AM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Greene County, IL, Jersey County, IL, Macoupin County, IL

The radar

The St Louis radar (KLSX), 61 km from the middle of the area, began a volume at 07:00 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.

What was reported inside it

Time	Report	Where	Remark
Jul 19, 6:05 AM CDT	HEAVY RAIN 3.3	Gillespie, IL	STILL RAINING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.0 hours before the alert went out and 187 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1300 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1247 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

944 
WGUS53 KLSX 190657
FFWLSX
ILC061-083-117-191300-
/O.NEW.KLSX.FF.W.0055.150719T0657Z-150719T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
157 AM CDT SUN JUL 19 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL GREENE COUNTY IN SOUTHWESTERN ILLINOIS...
  MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS...
  CENTRAL JERSEY COUNTY IN SOUTHWESTERN ILLINOIS...

* UNTIL 800 AM CDT SUNDAY
    
* AT 156 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. BETWEEN TWO AND THREE INCHES OF 
  RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN 
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  JERSEYVILLE...CARLINVILLE...GILLESPIE...CARROLLTON...MOUNT OLIVE...
  BENLD...GREENFIELD...SHIPMAN...WILSONVILLE...SAWYERVILLE...MOUNT
  CLARE...EAST GILLESPIE...EAGARVILLE...OLD KANE...KEMPER...PIASA...
  KANE...MEDORA...WRIGHTS AND FIELDON.

THIS INCLUDES INTERSTATE 55 IN ILLINOIS NEAR EXIT 44.
 
THIS WARNING ALSO INCLUDES BEAVER DAM STATE PARK.
 
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 3908 9059 3913 9061 3917 9061 3920 9059
      3929 9060 3936 9062 3944 8970 3906 8970

$$

CARNEY

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 2:39 AM CDT	Flash Flood Warning	LSX	Greene, Macoupin	6 hr
Jul 19, 3:12 AM CDT	Severe Thunderstorm Warning	LSX	Adams	48 min
Jul 19, 3:49 AM CDT	Flash Flood Warning	LSX	Adams, Brown, Pike	6 hr
Jul 19, 4:35 AM CDT	Flash Flood Watch	LSX	Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 1 more	11 hr
Jul 19, 4:53 AM CDT	Flash Flood Warning	LSX	Montgomery	6 hr
Jul 19, 7:59 AM CDT	Flash Flood Warning	LSX	Greene, Jersey, Macoupin	6 hr
Jul 19, 9:47 AM CDT	Flash Flood Warning	LSX	Brown, Pike	6 hr
Jul 19, 10:59 AM CDT	Areal Flood Advisory	LSX	Montgomery	5 hr
Jul 19, 11:23 AM CDT	Areal Flood Advisory	LSX	Pike	5 hr
Jul 19, 12:03 PM CDT	River Flood Warning	LSX	Pike	25 hr
Jul 19, 1:41 PM CDT	Flash Flood Warning	LSX	Greene, Jersey	5 hr
Jul 19, 4:03 PM CDT	Flash Flood Watch	LSX	Adams, Bond, Brown, Calhoun, Greene, Jersey and 6 more	20 hr
Jul 19, 6:23 PM CDT	Areal Flood Warning	LSX	Greene	24 hr

Nearby

Flash Flood Warnings in Illinois, 2015 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.