Alert archive / Illinois / Flash Flood Warnings in 2016
Flash Flood Warning 37, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Aug 12, 2016, 6:17 PM CDT for Calhoun County, Greene County, Pike County, Illinois. It was in force for 4 hr. 2 reports 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
- Aug 12, 2016, 6:17 PM CDT (23:17 UTC)
- Expired
- Aug 12, 2016, 10:15 PM CDT
- In force
- 4 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Calhoun County, IL, Greene County, IL, Pike County, IL
The radar
The St Louis radar (KLSX), 64 km from the middle of the area, began a volume at 23:17 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 |
|---|---|---|---|
| Aug 12, 6:54 PM CDT | HEAVY RAIN 2.75 | Carrollton, IL | RAINFALL SINCE 530 PM. WATER ON STREETS IN TOWN. |
| Aug 12, 7:27 PM CDT | HEAVY RAIN 3.5 | Kampsville, IL | 3.5 INCHES OVER THE PAST THREE HOURS. |
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 12:00Z, 11.3 hours before the alert went out and 191 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.
- Mixed-layer CAPE
- 1247 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
528
WGUS53 KLSX 122317
FFWLSX
ILC013-061-149-130315-
/O.NEW.KLSX.FF.W.0037.160812T2317Z-160813T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
617 PM CDT FRI AUG 12 2016
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
GREENE COUNTY IN SOUTHWESTERN ILLINOIS...
CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS...
* UNTIL 1015 PM CDT
* AT 612 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. TWO TO 4 INCHES OF RAIN HAVE
FALLEN ACROSS NORTHERN AND CENTRAL CALHOUN COUNTY THROUGH CENTRAL
GREENE COUNTY. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WHITE HALL...CARROLLTON...ROODHOUSE...HARDIN...ATHENSVILLE...
OLD KANE...PATTERSON...KANE...NEBO...KAMPSVILLE...WRIGHTS...
ELDRED...HILLVIEW...ROCKBRIDGE AND HAMBURG.
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.
&&
LAT...LON 3926 9015 3926 9019 3922 9021 3922 9031
3917 9031 3918 9048 3916 9050 3919 9051
3918 9058 3911 9060 3909 9068 3915 9071
3925 9073 3935 9085 3944 9102 3948 9106
3952 9058 3952 9016
$$
BRITT1 follow-up statement
066
WGUS73 KLSX 130255
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
955 PM CDT FRI AUG 12 2016
ILC013-061-149-130304-
/O.CAN.KLSX.FF.W.0037.000000T0000Z-160813T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIKE IL-GREENE IL-CALHOUN IL-
955 PM CDT FRI AUG 12 2016
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN PIKE COUNTY IN WEST
CENTRAL ILLINOIS...GREENE AND CALHOUN COUNTIES IN SOUTHWESTERN
ILLINOIS IS CANCELLED...
THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.
LAT...LON 3926 9015 3926 9019 3922 9021 3922 9031
3917 9031 3918 9048 3916 9050 3919 9051
3918 9058 3911 9060 3909 9068 3915 9071
3925 9073 3935 9085 3944 9102 3948 9106
3952 9058 3952 9016
$$
KANOFSKYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 3:44 AM CDT | Flash Flood Watch | LSX | Bond, Clinton, Fayette, Macoupin, Madison, Marion and 5 more | 4 days |
Nearby
Flash Flood Warnings in Illinois, 2016Every flash flood warning in 2016
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.