Alert archive / Illinois / Flash Flood Watches in 2024

Flash Flood Watch 1, NWS Lincoln, IL

April 2, 2024Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood watch at Apr 2, 2024, 11:17 AM CDT for Sangamon County, Illinois. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Apr 2, 2024, 11:17 AM CDT (16:17 UTC)
Expired: Apr 2, 2024, 9:49 PM CDT
In force: 11 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 16:16 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, 4.3 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 617 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 68 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 Apr 2, 11:01 AM CDT, 16 minutes earlier.

Area forecast discussion, Apr 2, 11:01 AM CDT, 16 minutes before

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Hazardous weather outlook, Apr 2, 5:23 AM CDT, 5 hours 54 minutes before

Hazardous Weather Outlook
National Weather Service Lincoln IL
523 AM CDT Tue Apr 2 2024

ILZ027>031-036>038-040>057-061-031030-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler-
Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-
Morgan-Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby-
523 AM CDT Tue Apr 2 2024

This Hazardous Weather Outlook is for central Illinois, east
central Illinois and west central Illinois.

.DAY ONE...Today and tonight.

An isolated thunderstorm is possible (30% chance) late this morning
into early afternoon.  Severe weather is not expected.

Northwest winds will gust 35 to 45 mph this afternoon, highest over
eastern IL.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Breezy northwest wind gusts of 35-45 mph are expected on Wednesday.

Low temperatures near freezing Thursday and Friday mornings may
cause some damage to early emerging vegetation.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated through tonight.

ILZ062-063-066>068-071>073-031030-
Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence-
523 AM CDT Tue Apr 2 2024

This Hazardous Weather Outlook is for east central Illinois and
southeast Illinois.

.DAY ONE...Today and tonight.

Scattered thunderstorms are expected late this morning into mid
afternoon.  A few storms could have damaging wind gusts and hail.

Northwest winds will gust 35 to 45 mph late this afternoon and
evening.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Breezy northwest wind gusts of 35-45 mph are expected on Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed between 10 am and 4 pm.

25

In the hours before

Local storm report, Apr 2, 8:42 AM CDT, 2 hours 35 minutes before

Preliminary Local Storm Report
National Weather Service Lincoln IL
842 AM CDT Tue Apr 2 2024

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

0700 AM     Rain             1 SSE Effingham         39.11N 88.53W
04/02/2024  M2.67 Inch       Effingham          IL   CO-OP Observer

&&

Barnes

Local storm report, Apr 2, 8:46 AM CDT, 2 hours 31 minutes before

Preliminary Local Storm Report
National Weather Service Lincoln IL
846 AM CDT Tue Apr 2 2024

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

0830 AM     Rain             Franklin                39.62N 90.05W
04/02/2024  M2.75 Inch       Morgan             IL   Mesonet

&&

Barnes

Local storm report, Apr 2, 8:55 AM CDT, 2 hours 22 minutes before

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Local storm report, Apr 2, 9:05 AM CDT, 2 hours 12 minutes before

Preliminary Local Storm Report
National Weather Service Lincoln IL
905 AM CDT Tue Apr 2 2024

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

0800 AM     Rain             1 ESE Mattoon           39.47N 88.35W
04/02/2024  M2.55 Inch       Coles              IL   CO-OP Observer

&&

Barnes

Local storm report, Apr 2, 9:15 AM CDT, 2 hours 2 minutes before

Preliminary Local Storm Report...Summary
National Weather Service Lincoln IL
915 AM CDT Tue Apr 2 2024

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

0830 AM     Rain             Franklin                39.62N 90.05W
04/02/2024  M2.75 Inch       Morgan             IL   Mesonet

0800 AM     Rain             1 ESE Mattoon           39.47N 88.35W
04/02/2024  M2.55 Inch       Coles              IL   CO-OP Observer

0800 AM     Rain             2 E Shelbyville         39.41N 88.77W
04/02/2024  M2.53 Inch       Shelby             IL   CO-OP Observer

0800 AM     Rain             Watson                  39.03N 88.57W
04/02/2024  M2.61 Inch       Effingham          IL   Cocorahs

0800 AM     Rain             Morrisonville           39.42N 89.46W
04/02/2024  M3.05 Inch       Christian          IL   CO-OP Observer

0730 AM     Rain             3 W Robinson            39.01N 87.80W
04/02/2024  M3.40 Inch       Crawford           IL   Mesonet

0700 AM     Rain             1 SSE Effingham         39.11N 88.53W
04/02/2024  M2.67 Inch       Effingham          IL   CO-OP Observer

0700 AM     Rain             Lovington               39.71N 88.63W
04/02/2024  M3.53 Inch       Moultrie           IL   CO-OP Observer

0700 AM     Rain             1 ESE Chatham           39.67N 89.68W
04/02/2024  M2.61 Inch       Sangamon           IL   Cocorahs

0700 AM     Rain             Robinson                39.01N 87.78W
04/02/2024  M2.85 Inch       Crawford           IL   CO-OP Observer

0700 AM     Rain             4 SE Southern View      39.72N 89.60W
04/02/2024  M2.19 Inch       Sangamon           IL   Mesonet

0700 AM     Rain             Mattoon                 39.48N 88.38W
04/02/2024  M2.91 Inch       Coles              IL   Cocorahs

0700 AM     Rain             Arthur                  39.72N 88.47W
04/02/2024  M3.70 Inch       Douglas            IL   Mesonet

0700 AM     Rain             Neoga                   39.32N 88.45W
04/02/2024  M2.00 Inch       Cumberland         IL   CO-OP Observer

0700 AM     Rain             Danville                40.14N 87.63W
04/02/2024  M2.02 Inch       Vermilion          IL   Emergency Mngr

0700 AM     Rain             Hutsonville             39.11N 87.66W
04/02/2024  M3.13 Inch       Crawford           IL   CO-OP Observer

0700 AM     Rain             1 E Paris               39.62N 87.67W
04/02/2024  M3.95 Inch       Edgar              IL   CO-OP Observer

0700 AM     Rain             1 E Taylorville Airport 39.53N 89.31W
04/02/2024  M4.20 Inch       Christian          IL   CO-OP Observer

0630 AM     Rain             1 NNE Flora             38.68N 88.48W
04/02/2024  M2.30 Inch       Clay               IL   CO-OP Observer

0630 AM     Rain             1 WSW Arthur            39.71N 88.49W
04/02/2024  M3.61 Inch       Moultrie           IL   CO-OP Observer

0600 AM     Rain             1 SSW Pana              39.37N 89.09W
04/02/2024  M2.32 Inch       Christian          IL   CO-OP Observer

0600 AM     Rain             1 N Windsor             39.45N 88.60W
04/02/2024  M2.40 Inch       Shelby             IL   CO-OP Observer

0600 AM     Rain             3 S Moweaqua            39.59N 89.02W
04/02/2024  M3.01 Inch       Shelby             IL   CO-OP Observer

&&

Barnes

Local storm report, Apr 2, 10:39 AM CDT, 38 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
Apr 1, 7:00 PM CDT	Severe Thunderstorm Warning	ILX	Macon, Moultrie, Piatt, Shelby	30 min
Apr 1, 7:15 PM CDT	Flash Flood Warning	ILX	Macon, Moultrie, Shelby	4 hr
Apr 1, 7:35 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Edgar, Vermilion	25 min
Apr 1, 8:34 PM CDT	Flash Flood Warning	ILX	Clark, Edgar	2 hr
Apr 2, 2:42 AM CDT	Wind Advisory	ILX	Champaign, Clark, Coles, Cumberland, Douglas, Edgar and 1 more	17 hr
Apr 2, 9:09 AM CDT	River Flood Warning	ILX	Clay, Richland	13 days
Apr 2, 10:00 AM CDT	River Flood Warning	ILX	Fulton, Knox	11 hr

Nearby

Flash Flood Watches in Illinois, 2024 Every flash flood watch in 2024

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.