Alert archive / Illinois / Flash Flood Warnings in 2008

Flash Flood Warning 25, NWS St. Louis, MO

May 25, 2008Calhoun County, Greene County, Jersey County, Illinois

NWS St. Louis, MO issued this flash flood warning at May 25, 2008, 11:31 AM CDT for Calhoun County, Greene County, Jersey County, Illinois. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 25, 2008, 11:31 AM CDT (16:31 UTC)
Expired: May 25, 2008, 3:30 PM CDT
In force: 4 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Calhoun County, IL, Greene County, IL, Jersey County, IL

The radar

The St Louis radar (KLSX), 67 km from the middle of the area, began a volume at 16:33 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, 4.5 hours before the alert went out and 192 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: 1337 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 233 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KLSX 251632
FFWLSX
ILC013-061-083-252030-
/O.NEW.KLSX.FF.W.0025.080525T1631Z-080525T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1131 AM CDT SUN MAY 25 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CALHOUN COUNTY IN SOUTHWEST ILLINOIS
  SOUTHERN GREENE COUNTY IN SOUTHWEST ILLINOIS
  NORTHERN JERSEY COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 330 PM CDT

* AT 1128 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  THUNDERSTORMS PRODUCING LOCALLY HEAVY RAINFALL WILL CONTINUE TO    
  MOVE ACROSS THE SAME AREA THROUGH 1 PM. THIS ADDITIONAL RAINFALL   
  ON TOP OF THE 2 TO 4 INCHES THAT HAS ALREADY OCCURRED THIS MORNING 
  WILL LIKELY LEAD TO FLASH FLOODING. 

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 3940 9066 3939 9066 3940 9061 3922 9016
      3908 9015 3909 9037 3924 9067 3940 9093
TIME...MOT...LOC 1631Z 180DEG 0KT 3930 9063

$$

CVKING

1 follow-up statement

000 
WGUS73 KLSX 252029
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
329 PM CDT SUN MAY 25 2008

ILC013-061-083-252039-
/O.EXP.KLSX.FF.W.0025.000000T0000Z-080525T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JERSEY IL-CALHOUN IL-GREENE IL-
329 PM CDT SUN MAY 25 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 330 PM CDT FOR SOUTHERN
GREENE...CALHOUN AND NORTHERN JERSEY COUNTIES...

A CHECK WITH AREA LAW ENFORCEMENT INDICATES THAT FLOODING IS NO
LONGER A PROBLEM IN THE AREA.

LAT...LON 3940 9066 3939 9066 3940 9061 3922 9016
      3908 9015 3909 9037 3924 9067 3940 9093
TIME...MOT...LOC 2029Z 180DEG 0KT 3930 9063

$$

TILLY

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 6:58 AM CDT	Severe Thunderstorm Warning	LSX	Adams	47 min
May 25, 8:45 AM CDT	Areal Flood Advisory	LSX	Adams, Pike	6 hr
May 25, 9:48 AM CDT	Flash Flood Warning	LSX	Pike	3 hr
May 25, 10:02 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey, Macoupin	43 min
May 25, 10:25 AM CDT	Severe Thunderstorm Warning	LSX	Madison	51 min
May 25, 11:21 AM CDT	Severe Thunderstorm Warning	LSX	Bond	39 min
May 25, 12:54 PM CDT	Severe Thunderstorm Warning	LSX	Madison	66 min
May 25, 1:37 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	38 min
May 25, 1:58 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette	62 min
May 25, 1:59 PM CDT	River Flood Warning	LSX	Calhoun, Jersey	3 days
May 25, 2:15 PM CDT	Severe Thunderstorm Warning	LSX	Marion	60 min
May 25, 3:18 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	42 min
May 25, 3:54 PM CDT	Flash Flood Warning	LSX	Monroe	3 hr
May 25, 3:57 PM CDT	Flash Flood Watch	LSX	Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more	71 hr
May 25, 4:00 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	60 min
May 25, 4:57 PM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair, Washington	78 min
May 25, 5:27 PM CDT	Tornado Warning	LSX	Randolph	33 min
May 25, 6:26 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Pike	64 min
May 25, 6:32 PM CDT	Flash Flood Warning	LSX	Randolph	118 min

Nearby

Flash Flood Warnings in Illinois, 2008 Every flash flood warning 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.