Alert archive / Illinois / Flash Flood Warnings in 2017

Flash Flood Warning 39, NWS Paducah, KY

July 13, 2017Hamilton County, White County, Illinois

NWS Paducah, KY issued this flash flood warning at Jul 13, 2017, 9:05 PM CDT for Hamilton County, White County, Illinois. It was in force for 115 min. 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: Jul 13, 2017, 9:05 PM CDT (02:05 UTC)
Expired: Jul 13, 2017, 11:00 PM CDT
In force: 115 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Flood severity: None

Counties Hamilton County, IL, White County, IL

The radar

The Evansville,IN radar (KVWX), 39 km from the middle of the area, began a volume at 02:09 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 13, 9:15 PM CDT	FLASH FLOOD	2 N Enfield, IL	WATER REPORTED OVER ROADWAY ON US HWY 45 NORTH OF ENFIELD.
Jul 13, 9:15 PM CDT	FLASH FLOOD	5 W Carmi, IL	WATER REPORTED OVER ROADWAY ON HIGHWAY 14 WEST OF CARMI.

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, 2.1 hours before the alert went out and 237 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: 281 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1095 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

460 
WGUS53 KPAH 140205
FFWPAH
ILC065-193-140400-
/O.NEW.KPAH.FF.W.0039.170714T0205Z-170714T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Paducah KY
905 PM CDT THU JUL 13 2017

The National Weather Service in Paducah has issued a

* Flash Flood Warning for...
  White County in southeastern Illinois...
  Hamilton County in south central Illinois...

* Until 1100 PM CDT

* At 903 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. As much as 1.5 to 3 inches of 
  rain has already fallen within the past hour. Flash flooding is 
  expected to begin shortly.

* Some locations that will experience flooding include...
  Carmi, McLeansboro, Grayville, Norris City, Crossville, Enfield,
  Dahlgren, Mill Shoals, Broughton, Maunie, Springerton, Macedonia,
  Belle Prairie City, Burnt Prairie and Phillipstown.

Additional rainfall amounts of up to an inch are possible in the 
warned area.

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.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3821 8799 3813 8795 3810 8802 3808 8801
      3809 8796 3808 8796 3805 8804 3803 8804
      3803 8801 3801 8802 3793 8804 3793 8807
      3791 8802 3789 8802 3792 8813 3791 8871
      3826 8870 3826 8799

$$

The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 13, 7:08 PM CDT	Special Weather Statement	PAH	Edwards	37 min
Jul 13, 7:20 PM CDT	Special Weather Statement	PAH	Wayne	40 min
Jul 13, 8:06 PM CDT	Special Weather Statement	PAH	Hamilton, White	39 min
Jul 13, 9:34 PM CDT	Special Weather Statement	PAH	Williamson	26 min
Jul 13, 11:12 PM CDT	Areal Flood Advisory	PAH	Johnson, Pope, Saline, Williamson	2 hr
Jul 14, 1:28 AM CDT	Areal Flood Advisory	PAH	Jackson, Perry, Union	3 hr

Nearby

Flash Flood Warnings in Illinois, 2017 Every flash flood warning in 2017

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.