Alert archive / Illinois / Flash Flood Warnings in 2021
Flash Flood Warning 4, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 19, 2021, 4:35 PM CDT for Calhoun County, Greene County, Jersey County, Illinois; Saint Charles County, Missouri. It was in force for 6 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
- Jun 19, 2021, 4:35 PM CDT (21:35 UTC)
- Expired
- Jun 19, 2021, 10:30 PM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Calhoun County, IL, Greene County, IL, Jersey County, IL, Saint Charles County, MO
The radar
The St Louis radar (KLSX), 42 km from the middle of the area, began a volume at 21:36 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 |
|---|---|---|---|
| Jun 19, 5:00 PM CDT | FLASH FLOOD | 1 Sse Hardin, IL | A CULVERT ON A ROAD JUST SOUTH OF HARDIN WAS WASHED OUT. ROAD IS GONE WITH A 10 FOOT WIDE BY 5 FOOT DEEP AREA WASHED OUT FROM THE ROADBED. VIA SCANNER. |
| Jun 19, 5:00 PM CDT | FLASH FLOOD | Nutwood, IL | NUMEROUS ROADS WERE FLOODED AROUND NUTWOOD AND FIELDON. ILLINOIS ROUTES 100 AND 16 WERE FLOODED IN SPOTS. |
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, 9.6 hours before the alert went out and 206 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1960 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
262
WGUS53 KLSX 192135
FFWLSX
ILC013-061-083-MOC183-200330-
/O.NEW.KLSX.FF.W.0004.210619T2135Z-210620T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
435 PM CDT Sat Jun 19 2021
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Southeastern Calhoun County in southwestern Illinois...
Southwestern Greene County in southwestern Illinois...
Southwestern Jersey County in southwestern Illinois...
Northeastern St. Charles County in east central Missouri...
* Until 1030 PM CDT.
* At 434 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to four inches of rain has
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...
East Hardin, Grafton, Fieldon and Nutwood.
This also includes Pere Marquette State Park.
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 3923 9055 3891 9034 3888 9048 3896 9054
3901 9058 3903 9057 3905 9059 3907 9058
3914 9062 3917 9061
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
Byrd3 follow-up statements
604
WGUS73 KLSX 192347
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
647 PM CDT Sat Jun 19 2021
ILC013-061-083-MOC183-200330-
/O.CON.KLSX.FF.W.0004.000000T0000Z-210620T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Greene IL-Jersey IL-St. Charles MO-
647 PM CDT Sat Jun 19 2021
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
SATURDAY FOR SOUTHEASTERN CALHOUN...SOUTHWESTERN GREENE...
SOUTHWESTERN JERSEY AND NORTHEASTERN ST. CHARLES COUNTIES...
At 644 PM CDT, law enforcement reported numerous roads were flooded
around Nutwood and Fieldon. Illinois Routes 100 and 16 were flooded
in spots. Up to five inches of rain has already fallen. However,
another area of showers and storms will move through with additional
heavy rainfall possible.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other drainage
and low lying areas.
Some locations that will experience flooding include...
Hardin, Grafton, Fieldon and Nutwood.
This also includes Pere Marquette State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 3923 9055 3891 9034 3888 9048 3896 9054
3901 9058 3903 9057 3905 9059 3907 9058
3914 9062 3917 9061
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...1 INCH IN 1 HOUR
$$
Byrd008
WGUS73 KLSX 200204
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
904 PM CDT Sat Jun 19 2021
ILC013-061-083-MOC183-200330-
/O.CON.KLSX.FF.W.0004.000000T0000Z-210620T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Greene IL-Jersey IL-St. Charles MO-
904 PM CDT Sat Jun 19 2021
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR
SOUTHEASTERN CALHOUN...SOUTHWESTERN GREENE...SOUTHWESTERN JERSEY AND
NORTHEASTERN ST. CHARLES COUNTIES...
At 903 PM CDT, law enforcement reported flash flooding continuing,
especially in the Nutwood and Fieldon areas. Debris remained over
several roadways due to the flooding.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement.
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...
Hardin, Grafton, Fieldon and Nutwood.
This also includes Pere Marquette State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3923 9055 3891 9034 3888 9048 3896 9054
3901 9058 3903 9057 3905 9059 3907 9058
3914 9062 3917 9061
FLASH FLOOD...OBSERVED
$$
KD049
WGUS73 KLSX 200328
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
1028 PM CDT Sat Jun 19 2021
ILC013-061-083-MOC183-200338-
/O.EXP.KLSX.FF.W.0004.000000T0000Z-210620T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Greene IL-Jersey IL-St. Charles MO-
1028 PM CDT Sat Jun 19 2021
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN CALHOUN...SOUTHWESTERN
GREENE...SOUTHWESTERN JERSEY AND NORTHEASTERN ST. CHARLES COUNTIES
WILL EXPIRE AT 1030 PM CDT SATURDAY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3923 9055 3891 9034 3888 9048 3896 9054
3901 9058 3903 9057 3905 9059 3907 9058
3914 9062 3917 9061
$$
KDThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 5:44 AM CDT | Severe Thunderstorm Warning | LSX | Marion | 18 min |
| Jun 19, 10:45 AM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 45 min |
| Jun 19, 2:15 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 31 min |
| Jun 19, 2:44 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 32 min |
| Jun 19, 2:52 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 38 min |
| Jun 19, 2:55 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 50 min |
| Jun 19, 3:21 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Pike | 25 min |
| Jun 19, 3:31 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 44 min |
| Jun 19, 4:10 PM CDT | Flash Flood Warning | LSX | Calhoun | 6 hr |
| Jun 19, 4:16 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Madison | 44 min |
| Jun 19, 4:43 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 47 min |
| Jun 19, 5:17 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 43 min |
| Jun 19, 5:25 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 35 min |
| Jun 19, 6:00 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 45 min |
| Jun 19, 5:09 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 51 min |
| Jun 19, 5:31 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Ralls | 59 min |
| Jun 19, 5:46 PM CDT | Severe Thunderstorm Warning | LSX | Pike, Ralls | 59 min |
| Jun 19, 5:58 PM CDT | Flash Flood Warning | LSX | Marion, Pike, Ralls | 6 hr |
| Jun 19, 6:46 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 44 min |
| Jun 19, 6:54 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Ralls | 51 min |
Nearby
Flash Flood Warnings in Illinois, 2021Flash Flood Warnings in Missouri, 2021Every flash flood warning in 2021
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.