Alert archive / Illinois / Flash Flood Watches in 2008

Flash Flood Watch 5, NWS Lincoln, IL

June 7, 2008Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood watch at Jun 7, 2008, 9:01 AM CDT for Sangamon County, Illinois. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Jun 7, 2008, 9:01 AM CDT (14:01 UTC)
Expired: Jun 8, 2008, 12:40 AM CDT
In force: 16 hr
Issued by: NWS Lincoln, IL
Flood severity: None

County Sangamon County, IL

The radar

The Lincoln radar (KILX), 52 km from the middle of the area, began a volume at 14:00 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 12:00Z, 2.0 hours before the alert went out and 100 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: 2468 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 502 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.7

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 Jun 7, 6:15 AM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Jun 7, 6:15 AM CDT, 2 hours 46 minutes before

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Hazardous weather outlook, Jun 7, 6:00 AM CDT, 3 hours 1 minute before

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In the hours before

Local storm report, Jun 7, 7:32 AM CDT, 1 hour 29 minutes before

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Local storm report, Jun 7, 7:41 AM CDT, 1 hour 20 minutes before

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Local storm report, Jun 7, 7:50 AM CDT, 1 hour 11 minutes before

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Local storm report, Jun 7, 8:07 AM CDT, 54 minutes before

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Local storm report, Jun 7, 8:21 AM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
821 AM CDT SAT JUN 07 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 AM     HEAVY RAIN       3 S NEWMAN              39.75N 87.99W
06/07/2008  M3.10 INCH       DOUGLAS            IL   PUBLIC

0730 AM     HEAVY RAIN       NEOGA                   39.32N 88.45W
06/07/2008  M3.41 INCH       CUMBERLAND         IL   CO-OP OBSERVER

0730 AM     HEAVY RAIN       STE. MARIE              38.93N 88.03W
06/07/2008  M5.05 INCH       JASPER             IL   CO-OP OBSERVER

&&

GEELHART

Local storm report, Jun 7, 9:01 AM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
901 AM CDT SAT JUN 07 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 AM     HEAVY RAIN       1 ESE MATTOON           39.47N 88.35W
06/07/2008  M3.10 INCH       COLES              IL   CO-OP OBSERVER

&&

GEELHART

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 7:29 PM CDT	Flash Flood Warning	ILX	Effingham	5 hr
Jun 6, 7:35 PM CDT	Tornado Warning	ILX	Clay	40 min
Jun 6, 8:48 PM CDT	Flash Flood Warning	ILX	Clark, Cumberland	4 hr
Jun 6, 9:55 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence, Richland	41 min
Jun 6, 10:19 PM CDT	Tornado Warning	ILX	Lawrence	26 min
Jun 6, 11:13 PM CDT	Areal Flood Warning	ILX	Clark, Crawford, Cumberland, Effingham, Jasper	10 hr
Jun 7, 2:42 AM CDT	Areal Flood Warning	ILX	Clark, Coles, Cumberland, Edgar, Shelby	4 days
Jun 7, 5:38 AM CDT	Areal Flood Warning	ILX	Champaign, Coles, Douglas, Edgar, Moultrie, Piatt and 2 more	5 days
Jun 7, 9:14 AM CDT	Areal Flood Warning	ILX	Clark, Crawford, Cumberland, Effingham, Jasper	5 days
Jun 7, 9:46 AM CDT	Areal Flood Warning	ILX	Clay, Lawrence, Richland	8 days
Jun 7, 10:41 AM CDT	Areal Flood Warning	ILX	Christian, Macon, Moultrie, Sangamon, Shelby	25 hr
Jun 7, 1:09 PM CDT	River Flood Warning	ILX	Vermilion	41 hr
Jun 7, 3:35 PM CDT	Tornado Warning	ILX	Marshall	25 min

Nearby

Flash Flood Watches in Illinois, 2008 Every flash flood watch in 2008

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.