Alert archive / Illinois / Flash Flood Warnings in 2023

Flash Flood Warning 13, NWS Lincoln, IL

May 14, 2023Christian County, Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood warning at May 14, 2023, 7:21 PM CDT for Christian County, Sangamon County, Illinois. It was in force for 2 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 14, 2023, 7:21 PM CDT (00:21 UTC)
Expired: May 14, 2023, 9:49 PM CDT
In force: 2 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Christian County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 74 km from the middle of the area, began a volume at 00:22 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 14, 8:13 PM CDT	FLASH FLOOD	Morrisonville, IL	REPORT FROM MPING: CREEK OVERFLOWING AND YARD FLOODING.
May 14, 8:33 PM CDT	FLASH FLOOD	Morrisonville, IL	MANY ROADS IN TOWN UNDER WATER.
May 14, 8:33 PM CDT	HEAVY RAIN 2.88	Morrisonville, 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, 0.4 hours before the alert went out and 104 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 311 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

062 
WGUS53 KILX 150021
FFWILX
ILC021-167-150330-
/O.NEW.KILX.FF.W.0013.230515T0021Z-230515T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
721 PM CDT Sun May 14 2023

The National Weather Service in Lincoln has issued a

* Flash Flood Warning for...
  Southwestern Christian County in central Illinois...
  Central Sangamon County in central Illinois...

* Until 1030 PM CDT.

* At 721 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Springfield, Taylorville, Chatham, Rochester, Pawnee, Kincaid, 
  Edinburg, Morrisonville, Bulpitt, Jeisyville, Jerome, Southern 
  View, Leland Grove, Tovey, Berry, Palmer, Curran, Sicily, 
  Sangchris Lake State Park and Sharpsburg.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3952 8954 3980 8989 3980 8947 3972 8943
      3935 8915 3935 8920 3935 8927 3935 8931
      3935 8943 3935 8953 3942 8953 3944 8953
      3947 8953 3952 8953

FLASH FLOOD...RADAR INDICATED

$$

25

1 follow-up statement

064 
WGUS73 KILX 150249
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
949 PM CDT Sun May 14 2023

ILC021-167-150259-
/O.CAN.KILX.FF.W.0013.000000T0000Z-230515T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Christian IL-Sangamon IL-
949 PM CDT Sun May 14 2023

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN CHRISTIAN AND 
CENTRAL SANGAMON COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3952 8954 3980 8989 3980 8947 3972 8943
      3935 8915 3935 8920 3935 8927 3935 8931
      3935 8943 3935 8953 3942 8953 3944 8953
      3947 8953 3952 8953

$$

25

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 14, 7:05 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Sangamon	25 min
May 14, 7:25 PM CDT	Severe Thunderstorm Warning	ILX	Christian	35 min
May 14, 7:42 PM CDT	Special Weather Statement	ILX	Richland	33 min
May 14, 7:50 PM CDT	Special Weather Statement	ILX	Cumberland	25 min
May 15, 5:22 AM CDT	River Flood Warning	ILX	Clay, Richland	5 days

Nearby

Flash Flood Warnings in Illinois, 2023 Every flash flood warning in 2023

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.