Alert archive / Illinois / Flash Flood Warnings in 2018
Flash Flood Warning 26, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jul 15, 2018, 3:15 PM CDT for Randolph County, Illinois. It was in force for 6 hr. 1 report 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
- Jul 15, 2018, 3:15 PM CDT (20:15 UTC)
- Expired
- Jul 15, 2018, 9:15 PM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Randolph County, IL
The radar
The St Louis radar (KLSX), 90 km from the middle of the area, began a volume at 20:17 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 |
|---|---|---|---|
| Jul 15, 3:39 PM CDT | FLASH FLOOD | Ruma, IL | FOX 2 METEOROLOGIST RECEIVED A MULTIPLE REPORTS OF STREET FLOODING IN RUMA. |
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, 8.3 hours before the alert went out and 263 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
- 142 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 657 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
330
WGUS53 KLSX 152015
FFWLSX
ILC157-160215-
/O.NEW.KLSX.FF.W.0026.180715T2015Z-180716T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
315 PM CDT SUN JUL 15 2018
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Northern Randolph County in southwestern Illinois...
* Until 915 PM CDT.
* At 315 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Ste. Genevieve, Sparta, Tilden, Evansville, Baldwin, Eden, Preston,
Prairie Du Rocher, Prairie, Ellis Grove, Ruma, Houston, Walsh,
Kellogg, Roots and Modoc.
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, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3797 9001 3801 9006 3801 9009 3802 9010
3804 9013 3806 9013 3807 9016 3807 9017
3809 9021 3813 9004 3818 9004 3822 8967
3808 8964
$$
Kanofsky2 follow-up statements
998
WGUS73 KLSX 160059
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
759 PM CDT SUN JUL 15 2018
ILC157-160215-
/O.CON.KLSX.FF.W.0026.000000T0000Z-180716T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Randolph IL-
759 PM CDT SUN JUL 15 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR
NORTHERN RANDOLPH COUNTY...
At 754 PM CDT, Doppler radar indicated thunderstorms have ended
across the warned area. Radar estimates that between 1 to 3 inches
of rain fell this afternoon on ground that received heavy rainfall
last night. Many creek and streams should be running near or above
bankfull.
Some locations that will experience flooding include...
Ste. Genevieve, Sparta, Tilden, Evansville, Baldwin, Eden, Preston,
Prairie Du Rocher, Prairie, Ellis Grove, Ruma, Houston, Walsh,
Kellogg, Roots and Modoc.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3797 9001 3801 9006 3801 9009 3802 9010
3804 9013 3806 9013 3807 9016 3807 9017
3809 9021 3813 9004 3818 9004 3822 8967
3808 8964
$$
Britt309
WGUS73 KLSX 160207
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
907 PM CDT SUN JUL 15 2018
ILC157-160217-
/O.EXP.KLSX.FF.W.0026.000000T0000Z-180716T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Randolph IL-
907 PM CDT SUN JUL 15 2018
...THE FLASH FLOOD WARNING FOR NORTHERN RANDOLPH COUNTY WILL EXPIRE
AT 915 PM CDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3797 9001 3801 9006 3801 9009 3802 9010
3804 9013 3806 9013 3807 9016 3807 9017
3809 9021 3813 9004 3818 9004 3822 8967
3808 8964
$$
BrittThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 7:32 PM CDT | Special Weather Statement | LSX | Washington | 43 min |
| Jul 14, 10:03 PM CDT | Flash Flood Warning | LSX | Randolph | 5 hr |
Nearby
Flash Flood Warnings in Illinois, 2018Every flash flood warning in 2018
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.