Alert archive / Illinois / Flash Flood Warnings in 2020
Flash Flood Warning 23, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 22, 2020, 2:15 PM CDT for Calhoun County, Pike County, Illinois. It was in force for 6 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
- Jun 22, 2020, 2:15 PM CDT (19:15 UTC)
- Expired
- Jun 22, 2020, 8:15 PM CDT
- In force
- 6 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), 84 km from the middle of the area, began a volume at 19:18 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, 7.3 hours before the alert went out and 198 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
- 401 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1137 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
526
WGUS53 KLSX 221915
FFWLSX
ILC013-149-230115-
/O.NEW.KLSX.FF.W.0023.200622T1915Z-200623T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
215 PM CDT Mon Jun 22 2020
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Northwestern Calhoun County in southwestern Illinois...
Southeastern Pike County in west central Illinois...
* Until 815 PM CDT Monday.
* At 213 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen to the south of Nebo. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flooding include...
Pleasant Hill, Clarksville, Pike, Belleview, Independence, Bedford,
Montezuma, Martinsburg, Nebo, Milton, Pearl, Florence, Time and
Beecreek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3963 9061 3954 9057 3943 9062 3935 9062
3932 9061 3929 9078 3935 9085 3938 9092
3941 9095 3946 9105 3963 9062
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
Britt2 follow-up statements
890
WGUS73 KLSX 222132
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
432 PM CDT Mon Jun 22 2020
ILC013-149-230115-
/O.CON.KLSX.FF.W.0023.000000T0000Z-200623T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Pike IL-
432 PM CDT Mon Jun 22 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
NORTHWESTERN CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS AND SOUTHEASTERN
PIKE COUNTIES IN WEST CENTRAL ILLINOIS...
At 430 PM CDT, Doppler radar indicated thunderstorms are diminishing
across the warned area. However, additional storms are possible
through this evening. Up to three inches of rain have already
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other drainage
and low lying areas.
Some locations that will experience flooding include...
Pleasant Hill, Clarksville, Pike, Belleview, Independence, Bedford,
Montezuma, Martinsburg, Nebo, Milton, Pearl, Florence, Time and
Beecreek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3963 9061 3954 9057 3943 9062 3935 9062
3932 9061 3929 9078 3935 9085 3938 9092
3941 9095 3946 9105 3963 9062
FLASH FLOOD...RADAR INDICATED
$$
Byrd290
WGUS73 KLSX 230107
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
807 PM CDT Mon Jun 22 2020
ILC013-149-230117-
/O.EXP.KLSX.FF.W.0023.000000T0000Z-200623T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Pike IL-
807 PM CDT Mon Jun 22 2020
...THE FLASH FLOOD WARNING FOR NORTHWESTERN CALHOUN COUNTY IN
SOUTHWESTERN ILLINOIS AND SOUTHEASTERN PIKE COUNTIES IN WEST CENTRAL
ILLINOIS WILL EXPIRE AT 815 PM CDT...
Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3963 9061 3954 9057 3943 9062 3935 9062
3932 9061 3929 9078 3935 9085 3938 9092
3941 9095 3946 9105 3963 9062
$$
ByrdThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 2:04 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Pike | 26 min |
| Jun 22, 4:26 PM CDT | Flash Flood Warning | LSX | Macoupin, Montgomery | 6 hr |
Nearby
Flash Flood Warnings in Illinois, 2020Every flash flood warning in 2020
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.