Alert archive / Illinois / Flash Flood Watches in 2010

Flash Flood Watch 2, NWS Lincoln, IL

May 12, 201016 counties in Illinois

NWS Lincoln, IL issued this flash flood watch at May 12, 2010, 3:03 AM CDT for 16 counties in Illinois. It took effect at May 12, 2010, 7:00 PM CDT. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: May 12, 2010, 3:03 AM CDT (08:03 UTC)
In effect from: May 12, 2010, 7:00 PM CDT
Expired: May 13, 2010, 2:35 PM CDT
In force: 20 hr
Issued by: NWS Lincoln, IL
Flood severity: None

Counties Cass County, IL, Fulton County, IL, Knox County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Peoria County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 47 km from the middle of the area, began a volume at 08:04 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 8.1 hours before the alert went out and 106 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: 902 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before this flash flood watch went out at May 12, 2:45 AM CDT, 18 minutes earlier.

Area forecast discussion, May 12, 2:45 AM CDT, 18 minutes before

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Hazardous weather outlook, May 11, 2:46 PM CDT, 12 hours 17 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 3:45 AM CDT	Special Weather Statement	ILX	Clay, Richland	45 min
May 12, 4:32 AM CDT	Special Weather Statement	ILX	Cumberland, Effingham	43 min
May 12, 4:47 AM CDT	Special Weather Statement	ILX	Richland	28 min
May 12, 5:11 AM CDT	Special Weather Statement	ILX	Lawrence	34 min
May 12, 5:18 AM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	27 min
May 12, 5:40 AM CDT	Areal Flood Advisory	ILX	Cumberland, Effingham, Jasper, Shelby	4 hr
May 12, 5:52 AM CDT	Special Weather Statement	ILX	Clay, Effingham, Jasper, Richland	38 min
May 12, 6:24 AM CDT	Special Weather Statement	ILX	Crawford, Jasper, Lawrence, Richland	66 min
May 12, 6:35 AM CDT	Areal Flood Advisory	ILX	Clay, Crawford, Jasper, Lawrence, Richland	3 hr
May 12, 9:00 AM CDT	River Flood Warning	ILX	Clay, Richland	5 days
May 12, 9:30 AM CDT	Areal Flood Advisory	ILX	Clay, Crawford, Lawrence, Richland	2 hr
May 12, 12:49 PM CDT	Special Weather Statement	ILX	Fulton	41 min

Nearby

Flash Flood Watches in Illinois, 2010 Every flash flood watch in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.