Alert archive / Illinois / Flash Flood Warnings in 2015

Flash Flood Warning 70, NWS St. Louis, MO

July 26, 2015Pike County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jul 26, 2015, 4:45 AM CDT for Pike County, Illinois. It was in force for 6 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
Jul 26, 2015, 4:45 AM CDT (09:45 UTC)
Expired
Jul 26, 2015, 10:45 AM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

County Pike County, IL

The radar

The St Louis radar (KLSX), 105 km from the middle of the area, began a volume at 09:47 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, 9.8 hours before the alert went out and 205 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2015-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1341 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2015-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1341 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1161 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

140 
WGUS53 KLSX 260945
FFWLSX
ILC149-261545-
/O.NEW.KLSX.FF.W.0070.150726T0945Z-150726T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
445 AM CDT SUN JUL 26 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 1045 AM CDT SUNDAY
    
* AT 445 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING  
  HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES THAT TWO TO   
  THREE INCHES OF RAIN FELL ACROSS PARTS OF PIKE COUNTY ILLINOIS    
  OUNTY SINCE 3 AM...AND ADDITIONAL POCKETS OF HEAVY RAIN WILL BE   
  POSSIBLE OVER THE NEXT FEW HOURS. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  PITTSFIELD...BARRY...GRIGGSVILLE...PLEASANT HILL...ATLAS...PIKE...
  INDEPENDENCE...BEDFORD...MONTEZUMA...HULL...MARTINSBURG...PERRY...
  NEW CANTON...NEBO...MILTON...KINDERHOOK...BAYLIS...CHAMBERSBURG...
  PEARL AND NEW SALEM.

THIS INCLUDES INTERSTATE 72 BETWEEN EXITS 10 AND 35.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3984 9057 3983 9057 3971 9065 3954 9057
      3946 9061 3940 9061 3940 9094 3942 9099
      3947 9106 3954 9110 3955 9115 3960 9118
      3962 9122 3972 9136 3975 9137 3976 9092
      3984 9092

$$

TRUETT
1 follow-up statement
707 
WGUS73 KLSX 261539
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1039 AM CDT SUN JUL 26 2015

ILC149-261548-
/O.EXP.KLSX.FF.W.0070.000000T0000Z-150726T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIKE IL-
1039 AM CDT SUN JUL 26 2015

...THE FLASH FLOOD WARNING FOR PIKE COUNTY IN WEST CENTRAL ILLINOIS
WILL EXPIRE AT 1045 AM CDT...

AT 1035 AM...ANOTHER ROUND OF STORMS WAS MOVING THROUGH PIKE COUNTY. 
HOWEVER...THE HEAVIER RAINS WITH THESE STORMS ARE FALLING TO THE 
SOUTHWEST OF PIKE COUNTY ILLINOIS. SO ADDITIONAL FLASH FLOODING IS 
NOT EXPECTED AT THIS TIME...THEREFORE THE FLASH FLOOD WARNING FOR 
PIKE COUNTY HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3984 9057 3983 9057 3971 9065 3954 9057
      3946 9061 3940 9061 3940 9094 3942 9099
      3947 9106 3954 9110 3955 9115 3960 9118
      3962 9122 3972 9136 3975 9137 3976 9092
      3984 9092

$$

BYRD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 4:23 AM CDTSpecial Weather StatementLSXCalhoun52 min
Jul 26, 5:03 AM CDTFlash Flood WarningLSXAdams5 hr
Jul 26, 3:55 PM CDTHeat AdvisoryLSXAdams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more53 hr

Nearby

Flash Flood Warnings in Illinois, 2015Every flash flood warning in 2015

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.