Alert archive / Illinois / Flash Flood Warnings in 2013
Flash Flood Warning 10, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at May 20, 2013, 10:22 PM CDT for Jersey County, Macoupin County, Madison County, Illinois. It was in force for 6 hr. 3 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
- May 20, 2013, 10:22 PM CDT (03:22 UTC)
- Expired
- May 21, 2013, 4:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Jersey County, IL, Macoupin County, IL, Madison County, IL
The radar
The St Louis radar (KLSX), 61 km from the middle of the area, began a volume at 03:22 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 |
|---|---|---|---|
| May 20, 11:51 PM CDT | HEAVY RAIN 3.84 | Plainview, IL | |
| May 21, 12:00 AM CDT | HEAVY RAIN 2.82 | 1 S Medora, IL | RUNNING WATER OVER MANY ROADS INCLUDING IL 16... IL 111... AND IL 267 AS WELL AS COUNTY AND TOWNSHIP ROADS THROUGHOUT FIDELITY...KEMPER... PIASA... SUMMERVILLE AND CHESTERFIELD AREAS |
| May 21, 1:00 AM CDT | HEAVY RAIN 3.5 | 7 S Carlinville, IL |
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, 3.4 hours before the alert went out and 181 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
- 1540 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1320 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
641
WGUS53 KLSX 210322
FFWLSX
ILC083-117-119-210930-
/O.NEW.KLSX.FF.W.0010.130521T0322Z-130521T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1022 PM CDT MON MAY 20 2013
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
JERSEY COUNTY IN SOUTHWEST ILLINOIS...
MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
NORTHWESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 430 AM CDT TUESDAY
* AT 1020 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RADAR ESTIMATES RAINS OF 1 TO 3 INCHES ACROSS THE
AREA OVER THE LAST SEVERAL HOURS....AND ADDITIONAL MODERATE TO
HEAVY RAIN CAN BE EXPECTED THROUGH 11 PM.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ALTON...BETHALTO...CARLINVILLE...GILLESPIE...GODFREY...
JERSEYVILLE...STAUNTON...VIRDEN...WOOD RIVER...BENLD...BRIGHTON...
BUNKER HILL...DORSEY...ELSAH...GIRARD...GRAFTON...HARTFORD...
KEMPER...MOUNT OLIVE...PALMYRA...PRAIRIETOWN...ROXANA...SHIPMAN...
WILSONVILLE AND WORDEN.
A STORM SPOTTER 1 MILE SOUTH OF MEDORA REPORTED 2.4 INCHES SO FAR
THIS EVENING.
THIS WARNING ALSO INCLUDES...
INTERSTATE 55 IN ILLINOIS FROM EXIT 41 TO EXIT 44.
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 3900 8971 3881 9011 3885 9011
3891 9022 3897 9042 3897 9048 3895 9052
3899 9057 3911 9061 3918 9058 3918 9051
3916 9050 3918 9049 3918 9031 3922 9031
3923 9020 3925 9020 3926 9015 3952 9015
$$
TRUETT1 follow-up statement
242
WGUS73 KLSX 210922
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
422 AM CDT TUE MAY 21 2013
ILC083-117-119-210937-
/O.EXP.KLSX.FF.W.0010.000000T0000Z-130521T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JERSEY IL-MACOUPIN IL-MADISON IL-
422 AM CDT TUE MAY 21 2013
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHWESTERN
MADISON...MACOUPIN AND JERSEY COUNTIES WILL BE ALLOWED TO EXPIRE AT
430 AM CDT...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 3952 8970 3900 8971 3881 9011 3885 9011
3891 9022 3897 9042 3897 9048 3895 9052
3899 9057 3911 9061 3918 9058 3918 9051
3916 9050 3918 9049 3918 9031 3922 9031
3923 9020 3925 9020 3926 9015 3952 9015
$$
PHILLIPSONThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 7:27 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 48 min |
| May 20, 7:30 PM CDT | Tornado Warning | LSX | Adams, Pike | 30 min |
| May 20, 9:28 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison | 47 min |
| May 20, 9:36 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 39 min |
| May 20, 9:39 PM CDT | Flash Flood Warning | LSX | Calhoun | 6 hr |
| May 20, 10:10 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Monroe, Saint Clair | 35 min |
| May 20, 10:17 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison, Montgomery | 43 min |
| May 20, 10:31 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Montgomery, Saint Clair | 59 min |
| May 20, 10:38 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph | 67 min |
| May 20, 11:29 PM CDT | River Flood Warning | LSX | Madison | 3 days |
Nearby
Flash Flood Warnings in Illinois, 2013Every flash flood warning in 2013
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.