Alert archive / Illinois / Flash Flood Warnings in 2012
Flash Flood Warning 10, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Mar 16, 2012, 9:20 AM CDT for Macoupin County, Illinois. It was in force for 2 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
- Mar 16, 2012, 9:20 AM CDT (14:20 UTC)
- Expired
- Mar 16, 2012, 11:37 AM CDT
- In force
- 2 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Macoupin County, IL
The radar
The Lincoln radar (KILX), 84 km from the middle of the area, began a volume at 14:24 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, 2.3 hours before the alert went out and 124 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
- 358 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 1138 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
333
WGUS53 KLSX 161420
FFWLSX
ILC117-161830-
/O.NEW.KLSX.FF.W.0010.120316T1420Z-120316T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
920 AM CDT FRI MAR 16 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 130 PM CDT
* AT 918 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS CONTINUING TO FORM NEAR GIRARD...PRODUCING SPOTTY
BUT VERY HEAVY RAINFALL. RAINFALL ESTIMATES FROM RADAR INDICATE
THAT SOME LOCATIONS NEAR GIRARD HAVE RECEIVED 2 TO 3 INCHES OF
RAIN SINCE 730 AM.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
VIRDEN AND GIRARD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 3952 8970 3944 8970 3941 8970 3941 8971
3941 8985 3952 8986
$$
TRUETT1 follow-up statement
328
WGUS73 KLSX 161637
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1137 AM CDT FRI MAR 16 2012
ILC117-161647-
/O.CAN.KLSX.FF.W.0010.000000T0000Z-120316T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MACOUPIN IL-
1137 AM CDT FRI MAR 16 2012
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHEASTERN
MACOUPIN COUNTY IS CANCELLED..
MOST OF THE RAIN OVER NORTHEAST MACOUPIN COUNTY TAPERED OFF BY MID
MORNING. AT 1115 AM...MACOUPIN COUNTY ESDA INDICATED NO FLOODING
PROBLEMS HAD BEEN REPORTED IN NORTHEAST MACOUPIN COUNTY...AND THE
GIRARD AREA.
LAT...LON 3952 8970 3944 8970 3941 8970 3941 8971
3941 8985 3952 8986
$$
TRUETTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 15, 9:51 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 39 min |
Nearby
Flash Flood Warnings in Illinois, 2012Every flash flood warning in 2012
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.