Alert archive / Illinois / Flash Flood Watches in 2019

Flash Flood Watch 9, NWS Lincoln, IL

September 1, 2019Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood watch at Sep 1, 2019, 10:11 AM CDT for Sangamon County, Illinois. It was in force for 22 hr.

The area

The counties it named.

The facts

Issued: Sep 1, 2019, 10:11 AM CDT (15:11 UTC)
Expired: Sep 2, 2019, 8:38 AM CDT
In force: 22 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 15:11 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, 3.2 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: 30 J/kg
Mixed-layer CIN: -210 J/kg
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 109 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 Sep 1, 6:37 AM CDT, 3 hours 34 minutes earlier.

Area forecast discussion, Sep 1, 6:37 AM CDT, 3 hours 34 minutes before

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Hazardous weather outlook, Sep 1, 4:02 AM CDT, 6 hours 9 minutes before

Hazardous Weather Outlook
National Weather Service Lincoln IL
402 AM CDT Sun Sep 1 2019

ILZ027>031-036>038-040-041-020915-
Fulton-Knox-Marshall-Mason-McLean-Peoria-Schuyler-Stark-Tazewell-
Woodford-
402 AM CDT Sun Sep 1 2019

This Hazardous Weather Outlook is for portions of central
Illinois and west central Illinois.

.DAY ONE...TODAY AND TONIGHT...

Scattered thunderstorms are possible through late afternoon or
early evening. These will not be severe, but some could produce
locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

Scattered thunderstorms are possible again Tuesday and Tuesday
night. Some of these storms could be strong to severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated through tonight.

ILZ042>057-061>063-066>068-071>073-020915-
Cass-Champaign-Christian-Clark-Clay-Coles-Crawford-Cumberland-
De Witt-Douglas-Edgar-Effingham-Jasper-Lawrence-Logan-Macon-
Menard-Morgan-Moultrie-Piatt-Richland-Sangamon-Scott-Shelby-
Vermilion-
402 AM CDT Sun Sep 1 2019

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

.DAY ONE...TODAY AND TONIGHT...

Scattered thunderstorms are possible through late afternoon or
early evening. These will not be severe, but some could produce
locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

Scattered thunderstorms are possible again Tuesday evening and
night. The risk of severe storms appears low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated through tonight.

Deubelbeiss

In the hours before

Local storm report, Sep 1, 9:12 AM CDT, 59 minutes before

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Local storm report, Sep 1, 9:19 AM CDT, 52 minutes before

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Local storm report, Sep 1, 9:23 AM CDT, 48 minutes before

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Local storm report, Sep 1, 9:27 AM CDT, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
927 AM CDT SUN SEP 1 2019

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

0700 AM     HEAVY RAIN       CHESTNUT                40.07N 89.20W
09/01/2019  M1.00 INCH       LOGAN              IL   COCORAHS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       1 WSW TUSCOLA           39.79N 88.30W
09/01/2019  M1.48 INCH       DOUGLAS            IL   COCORAHS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       7 WSW MONTICELLO        39.99N 88.70W
09/01/2019  M1.52 INCH       PIATT              IL   COCORAHS

0700 AM     HEAVY RAIN       7 SSE PETERSBURG        39.92N 89.80W
09/01/2019  M1.50 INCH       MENARD             IL   COCORAHS

            24-HOUR TOTAL

0730 AM     HEAVY RAIN       1 NNW DANVILLE          40.16N 87.63W
09/01/2019  M1.99 INCH       VERMILION          IL   COCORAHS

            24-HOUR TOTAL

0800 AM     HEAVY RAIN       4 NNE MONTICELLO        40.08N 88.55W
09/01/2019  M1.31 INCH       PIATT              IL   COCORAHS

            24-HOUR TOTAL

&&

LAUFENBERG

Local storm report, Sep 1, 9:43 AM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
943 AM CDT SUN SEP 1 2019

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

0900 AM     HEAVY RAIN       NEW BERLIN              39.73N 89.91W
09/01/2019  M3.09 INCH       SANGAMON           IL   PUBLIC

0900 AM     HEAVY RAIN       5 SSE SPRINGFIELD       39.73N 89.62W
09/01/2019  M2.20 INCH       SANGAMON           IL   PUBLIC

            NEAR UIS

&&

GEELHART

Local storm report, Sep 1, 9:47 AM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LINCOLN IL
947 AM CDT SUN SEP 1 2019

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

0330 AM     LIGHTNING        2 E CHATHAM             39.67N 89.65W
09/01/2019                   SANGAMON           IL   NWS EMPLOYEE

            BARN BURNED DOWN AFTER BEING STRUCK BY LIGHTNING. TIME
            ESTIMATED BASED ON RADAR.

0645 AM     HEAVY RAIN       2 W RIVERTON            39.85N 89.58W
09/01/2019  M1.36 INCH       SANGAMON           IL   COCORAHS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       4 W SPRINGFIELD         39.80N 89.72W
09/01/2019  M3.88 INCH       SANGAMON           IL   COCORAHS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       LOAMI                   39.67N 89.85W
09/01/2019  M5.27 INCH       SANGAMON           IL   TRAINED SPOTTER

            STORM TOTAL RAINFALL SO FAR...STILL RAINING LIGHTLY.

0700 AM     HEAVY RAIN       7 SSE PETERSBURG        39.92N 89.80W
09/01/2019  M1.50 INCH       MENARD             IL   COCORAHS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       7 WSW MONTICELLO        39.99N 88.70W
09/01/2019  M1.52 INCH       PIATT              IL   COCORAHS

0700 AM     HEAVY RAIN       1 WSW TUSCOLA           39.79N 88.30W
09/01/2019  M1.48 INCH       DOUGLAS            IL   COCORAHS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       CHESTNUT                40.07N 89.20W
09/01/2019  M1.00 INCH       LOGAN              IL   COCORAHS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       5 WNW SPRINGFIELD       39.83N 89.73W
09/01/2019  M4.38 INCH       SANGAMON           IL   COCORAHS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       2 E CHATHAM             39.67N 89.66W
09/01/2019  M4.57 INCH       SANGAMON           IL   COCORAHS

0700 AM     HEAVY RAIN       PANA                    39.39N 89.08W
09/01/2019  M1.04 INCH       CHRISTIAN          IL   CO-OP OBSERVER

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       CAPITAL AIRPORT         39.84N 89.68W
09/01/2019  M1.69 INCH       SANGAMON           IL   ASOS

            24-HOUR TOTAL

0700 AM     HEAVY RAIN       CHATHAM                 39.67N 89.70W
09/01/2019  M5.80 INCH       SANGAMON           IL   COCORAHS

            24-HOUR TOTAL

0730 AM     HEAVY RAIN       1 NNW DANVILLE          40.16N 87.63W
09/01/2019  M1.99 INCH       VERMILION          IL   COCORAHS

            24-HOUR TOTAL

0800 AM     HEAVY RAIN       4 NNE MONTICELLO        40.08N 88.55W
09/01/2019  M1.31 INCH       PIATT              IL   COCORAHS

            24-HOUR TOTAL

0800 AM     HEAVY RAIN       3 NW SPRINGFIELD        39.83N 89.68W
09/01/2019  M3.25 INCH       SANGAMON           IL   COCORAHS

            24-HOUR TOTAL

0800 AM     HEAVY RAIN       7 SSE SPRINGFIELD       39.71N 89.59W
09/01/2019  M2.43 INCH       SANGAMON           IL   COCORAHS

            24-HOUR TOTAL

0800 AM     FLASH FLOOD      5 SW SPRINGFIELD        39.75N 89.72W
09/01/2019                   SANGAMON           IL   BROADCAST MEDIA

            I-72 COVERED WITH WATER WEST OF VETERANS PARKWAY

0800 AM     HEAVY RAIN       2 E CHATHAM             39.67N 89.66W
09/01/2019  M4.78 INCH       SANGAMON           IL   NWS EMPLOYEE

            STORM TOTAL RAINFALL

0900 AM     HEAVY RAIN       2 WNW SPRINGFIELD       39.81N 89.67W
09/01/2019  M3.50 INCH       SANGAMON           IL   PUBLIC

0900 AM     HEAVY RAIN       AUBURN                  39.58N 89.75W
09/01/2019  E6.00 INCH       SANGAMON           IL   PUBLIC

0900 AM     HEAVY RAIN       2 E PAWNEE              39.59N 89.54W
09/01/2019  M4.20 INCH       SANGAMON           IL   MESONET

0900 AM     HEAVY RAIN       5 SW ROCHESTER          39.70N 89.60W
09/01/2019  E4.00 INCH       SANGAMON           IL   PUBLIC

            NEAR LINCOLN MEMORIAL GARDENS

0900 AM     FLOOD            2 N DIVERNON            39.59N 89.65W
09/01/2019                   SANGAMON           IL   NWS EMPLOYEE

            WATER OVER FRAZEE RD NORTHWEST OF INTERSECTION OF I-55
            AND HIGHWAY 104

0900 AM     HEAVY RAIN       4 W SPRINGFIELD         39.80N 89.72W
09/01/2019  M5.12 INCH       SANGAMON           IL   PUBLIC

            HARRISON PARK SUBDIVISION

0900 AM     HEAVY RAIN       1 N DIVERNON            39.58N 89.65W
09/01/2019  E5.00 INCH       SANGAMON           IL   PUBLIC

0900 AM     HEAVY RAIN       WAVERLY                 39.59N 89.95W
09/01/2019  M2.80 INCH       MORGAN             IL   PUBLIC

0900 AM     HEAVY RAIN       3 SW SPRINGFIELD        39.77N 89.69W
09/01/2019  E3.00 INCH       SANGAMON           IL   PUBLIC

            MONTVALE SUBDIVISION

0900 AM     HEAVY RAIN       1 W PAWNEE              39.59N 89.60W
09/01/2019  E7.00 INCH       SANGAMON           IL   PUBLIC

0900 AM     HEAVY RAIN       CHATHAM                 39.67N 89.70W
09/01/2019  M4.94 INCH       SANGAMON           IL   PUBLIC

0900 AM     FLASH FLOOD      2 NNW CURRAN            39.77N 89.78W
09/01/2019                   SANGAMON           IL   BROADCAST MEDIA

            LENHART ROAD FLOODED AND PEOPLE TRAPPED IN HOMES. RELAYED
            VIA WICS-TV

0900 AM     HEAVY RAIN       NEW BERLIN              39.73N 89.91W
09/01/2019  M3.09 INCH       SANGAMON           IL   PUBLIC

0900 AM     HEAVY RAIN       5 SSE SPRINGFIELD       39.73N 89.62W
09/01/2019  M2.20 INCH       SANGAMON           IL   PUBLIC

            NEAR UIS

&&

LAUFENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 4:46 AM CDT	Flash Flood Warning	ILX	Sangamon	10 hr
Sep 1, 2:36 PM CDT	Tornado Warning Tornado observed	ILX	Cumberland	39 min
Sep 1, 3:44 PM CDT	Special Weather Statement	ILX	Champaign, Clark, Coles, Crawford, Cumberland, Douglas and 5 more	2 hr

Nearby

Flash Flood Watches in Illinois, 2019 Every flash flood watch in 2019

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.