Alert archive / Missouri / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Quad Cities, IA

May 25, 2011Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this flash flood warning at May 25, 2011, 4:33 PM CDT for Clark County, Scotland County, Missouri. It was in force for 3 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, 2011, 4:33 PM CDT (21:33 UTC)
Expired
May 25, 2011, 7:19 PM CDT
In force
3 hr
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Flood severity
None

Counties Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 169 km from the middle of the area, began a volume at 21:33 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, 9.6 hours before the alert went out and 285 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 12:00Z on 2011-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1832 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 12:00Z on 2011-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 253 square meters per square second.19395878Sfc1 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
1832 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
561 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
253 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
1.6
Supercell composite
10.1

Open this sounding in Storm Lab

The text

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

050 
WGUS53 KDVN 252133
FFWDVN
MOC045-199-260330-
/O.NEW.KDVN.FF.W.0002.110525T2133Z-110526T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
433 PM CDT WED MAY 25 2011

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN CLARK COUNTY IN NORTHEAST MISSOURI...
  NORTHEASTERN SCOTLAND COUNTY IN NORTHEAST MISSOURI...

* UNTIL 1030 PM CDT

* AT 424 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH   
FLOODING FROM A THUNDERSTORM IN NORTHEAST SCOTLAND COUNTY.  WATER 
WAS REPORTED OVER SOME SECONDARY ROADS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PROSPECT
  GROVE AND AZEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS LIKELY ON THE NORTH AND SOUTH WYACONDA RIVERS.

FLOODING OF SMALL STREAMS AND CREEKS...COUNTY ROADS...AND LOW LYING
FARMLAND IS LIKELY.

&&

LAT...LON 4059 9204 4048 9172 4032 9174 4044 9211

$$

WOLF
2 follow-up statements
527 
WGUS73 KDVN 252242
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
542 PM CDT WED MAY 25 2011

MOC045-199-260330-
/O.CON.KDVN.FF.W.0002.000000T0000Z-110526T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK MO-SCOTLAND MO-
542 PM CDT WED MAY 25 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR
NORTHEASTERN SCOTLAND AND WESTERN CLARK COUNTIES...

AT 538 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT RAIN HAS SLACKENED CONSIDERABLY AND THE HEAVIEST RAIN HAS MOVED 
OFF TO THE NORTH.  HOWEVER...IT WILL TAKE SOME TIME FOR WATER TO 
RUNOFF AND FLASH FLOODING TO SUBSIDE.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GRANGER AND 
THE NORTH AND SOUTH WYACONDA RIVERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING OF SMALL STREAMS AND CREEKS...COUNTY ROADS...AND LOW LYING
FARMLAND IS LIKELY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR SOUTHEAST IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI.

&&

LAT...LON 4059 9204 4048 9172 4032 9174 4044 9211

$$

WOLF
544 
WGUS73 KDVN 260019
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
719 PM CDT WED MAY 25 2011

MOC045-199-260028-
/O.CAN.KDVN.FF.W.0002.000000T0000Z-110526T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK MO-SCOTLAND MO-
719 PM CDT WED MAY 25 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHEASTERN
SCOTLAND AND WESTERN CLARK COUNTIES...

WATER HAS RECEDED FROM ROADS IN NORTHEAST SCOTLAND COUNTY AND NO 
FURTHER RAINFALL IS EXPECTED...THUS THE FLASH FLOOD WARNING HAS BEEN 
CANCELLED.

LAT...LON 4059 9204 4048 9172 4032 9174 4044 9211

$$

WOLF

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 25, 2:20 AM CDTSpecial Weather StatementDVNClark, Scotland70 min
May 25, 2:38 AM CDTFlash Flood WatchDVNClark, Scotland20 hr
May 25, 6:37 AM CDTRiver Flood WarningDVNClark52 hr
May 25, 11:46 AM CDTRiver Flood WarningDVNClark13 days
May 25, 3:34 PM CDTSevere Thunderstorm WarningDVNClark, Scotland56 min

Nearby

Flash Flood Warnings in Missouri, 2011Every flash flood warning in 2011

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.