Alert archive / Illinois / Flash Flood Warnings in 2020

Flash Flood Warning 28, NWS St. Louis, MO

June 30, 2020Pike County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jun 30, 2020, 3:35 AM CDT for Pike County, Illinois. 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 30, 2020, 3:35 AM CDT (08:35 UTC)
Expired: Jun 30, 2020, 9:30 AM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Pike County, IL

The radar

The St Louis radar (KLSX), 111 km from the middle of the area, began a volume at 08:37 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 30, 7:00 AM CDT	HEAVY RAIN 3.34	1 Nne Pittsfield, IL	CO-OP OBSERVER STATION PTTI2 0.7 NE PITTSFIELD.
Jun 30, 8:55 AM CDT	HEAVY RAIN 1.75	2 Ne Pittsfield, IL	AWOS STATION KPPQ PITTSFIELD.

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, 8.6 hours before the alert went out and 218 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 436 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1789 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: -17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

810 
WGUS53 KLSX 300835
FFWLSX
ILC149-301430-
/O.NEW.KLSX.FF.W.0028.200630T0835Z-200630T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
335 AM CDT Tue Jun 30 2020

The National Weather Service in St Louis has issued a

* Flash Flood Warning for...
  Central Pike County in west central Illinois...

* Until 930 AM CDT.

* At 334 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Radar indicates that 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...
  Pittsfield, Barry, New Canton, Kinderhook, Baylis, New Salem, El
  Dara and New Hartford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3958 9074 3957 9117 3959 9117 3961 9119
      3962 9122 3969 9131 3969 9117 3976 9118
      3976 9086

FLASH FLOOD...RADAR INDICATED

$$

Fuchs

2 follow-up statements

144 
WGUS73 KLSX 301334
FFSLSX

Flash Flood Statement
National Weather Service St Louis MO
834 AM CDT Tue Jun 30 2020

ILC149-301430-
/O.CON.KLSX.FF.W.0028.000000T0000Z-200630T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pike IL-
834 AM CDT Tue Jun 30 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 AM CDT FOR
CENTRAL PIKE COUNTY IN WEST CENTRAL ILLINOIS...

At 831 AM CDT, Doppler radar indicated showers and thunderstorms 
continuing across the warned area. Most locations have seen between 
three and five inches of rain overnight. An additional inch of rain 
is possible through 930 am. Several reports of water over roadways 
have been received by law enforcement.

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...
Pittsfield, Barry, New Canton, Kinderhook, Baylis, New Salem, El Dara
and New Hartford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3958 9074 3957 9117 3959 9117 3961 9119
      3962 9122 3969 9131 3969 9117 3976 9118
      3976 9086

FLASH FLOOD...RADAR INDICATED

$$

CVKING

518 
WGUS73 KLSX 301431
FFSLSX

Flash Flood Statement
National Weather Service St Louis MO
931 AM CDT Tue Jun 30 2020

ILC149-301440-
/O.EXP.KLSX.FF.W.0028.000000T0000Z-200630T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pike IL-
931 AM CDT Tue Jun 30 2020

...THE FLASH FLOOD WARNING FOR CENTRAL PIKE COUNTY IN WEST CENTRAL
ILLINOIS HAS EXPIRED...

The heavy rain has ended. Flooding of low lying areas may continue 
this morning, please continue to heed any remaining road closures.

LAT...LON 3958 9074 3957 9117 3959 9117 3961 9119
      3962 9122 3969 9131 3969 9117 3976 9118
      3976 9086

$$

CVKING

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 29, 11:14 PM CDT	Areal Flood Warning	LSX	Adams	3 hr
Jun 30, 12:21 AM CDT	Flash Flood Warning	LSX	Adams, Pike	6 hr
Jun 30, 1:34 AM CDT	Flash Flood Warning Considerable damage threat	LSX	Adams	6 hr
Jun 30, 2:33 AM CDT	Areal Flood Advisory	LSX	Monroe, Saint Clair	3 hr
Jun 30, 4:21 AM CDT	Flash Flood Warning	LSX	Monroe, Saint Clair, Washington	6 hr
Jun 30, 4:33 AM CDT	Flash Flood Warning	LSX	Adams	6 hr
Jun 30, 5:15 AM CDT	Flash Flood Warning	LSX	Washington	5 hr
Jun 30, 6:02 AM CDT	Flash Flood Warning	LSX	Adams	6 hr
Jun 30, 6:13 AM CDT	Areal Flood Warning	LSX	Adams, Pike	6 hr
Jun 30, 10:12 AM CDT	Flash Flood Warning	LSX	Fayette	6 hr
Jun 30, 11:41 AM CDT	River Flood Warning	LSX	Adams	53 hr
Jun 30, 11:41 AM CDT	River Flood Warning	LSX	Adams	48 hr
Jun 30, 11:41 AM CDT	River Flood Warning	LSX	Pike	66 hr
Jun 30, 11:41 AM CDT	River Flood Warning	LSX	Jersey	6 days
Jun 30, 12:59 PM CDT	Areal Flood Advisory	LSX	Madison, Saint Clair	3 hr
Jun 30, 4:49 PM CDT	Flash Flood Warning	LSX	Randolph	5 hr

Nearby

Flash Flood Warnings in Illinois, 2020 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.