Alert archive / Iowa / Flash Flood Warnings in 2015

Flash Flood Warning 1, NWS La Crosse, WI

June 15, 2015Fayette County, Iowa

NWS La Crosse, WI issued this flash flood warning at Jun 15, 2015, 4:29 AM CDT for Fayette County, Iowa. 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
Jun 15, 2015, 4:29 AM CDT (09:29 UTC)
Expired
Jun 15, 2015, 7:30 AM CDT
In force
3 hr
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Flood severity
None

County Fayette County, IA

The radar

The La Crosse radar (KARX), 127 km from the middle of the area, began a volume at 09:33 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

Davenport, (KDVN), launched 00:00Z, 9.5 hours before the alert went out and 170 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, Davenport, at 00:00Z on 2015-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 180 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, Davenport, at 00:00Z on 2015-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
180 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1271 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
74 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.

445 
WGUS53 KARX 150929
FFWARX
IAC065-151230-
/O.NEW.KARX.FF.W.0001.150615T0929Z-150615T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
429 AM CDT MON JUN 15 2015

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL FAYETTE COUNTY IN NORTHEASTERN IOWA...

* UNTIL 730 AM CDT
    
* AT 424 AM CDT...DOPPLER RADAR SHOWED HEAVY RAIN FALLING ACROSS 
  SOUTH CENTRAL FAYETTE COUNTY. UP TO THREE INCHES OF RAIN HAVE 
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MAYNARD...COUNTY ROADS W 33 AND 187...AND THE TWIN BRIDGES PARK. 

ADDITIONAL RAINFALL AMOUNTS OF UP TO 1 INCH WILL BE POSSIBLE IN THE 
WARNED AREA.

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.

&&

LAT...LON 4282 9184 4273 9177 4272 9185 4282 9192

$$

BOYNE
3 follow-up statements
246 
WGUS73 KARX 151034
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
534 AM CDT MON JUN 15 2015

IAC065-151230-
/O.CON.KARX.FF.W.0001.000000T0000Z-150615T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FAYETTE IA-
534 AM CDT MON JUN 15 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM CDT FOR
SOUTH CENTRAL FAYETTE COUNTY...

AT 527 AM CDT...DOPPLER RADAR INDICATED THAT UP TO THREE AND A HALF 
INCHES OF RAIN HAVE ALREADY FALLEN IN PARTS OF SOUTH CENTRAL FAYETTE 
COUNTY. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY ALONG THE LITTLE 
VOLGA RIVER NEAR AND AROUND MAYNARD.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... 
MAYNARD...COUNTY ROAD W 33 AND 187...AND THE TWIN BRIDGES PARK 
CAMPGROUND. 

ADDITIONAL RAINFALL AMOUNTS OF UP TO A HALF INCH IS POSSIBLE IN 
AREAS DRAINED BY THE LITTLE VOLGA RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4282 9184 4273 9177 4272 9185 4282 9192

$$

BOYNE
890 
WGUS73 KARX 151145
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
645 AM CDT MON JUN 15 2015

IAC065-151230-
/O.CON.KARX.FF.W.0001.000000T0000Z-150615T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FAYETTE IA-
645 AM CDT MON JUN 15 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM CDT FOR
SOUTH CENTRAL FAYETTE COUNTY...

AT 639 AM CDT...DOPPLER RADAR INDICATED SOME LIGHTER RAIN CONTINUED 
ACROSS MUCH OF FAYETTE COUNTY AND THE WARNED AREA. UP TO 3.5 INCHES 
OF RAIN FELL OVERNIGHT IN THE WARNED AREA...MOST OF THIS BETWEEN 330 
AM AND 430 AM THIS MORNING. FLASH FLOODING IS LIKELY FROM THIS RAIN.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...MAYNARD... 
COUNTY ROAD W 33 AND 187 AND THE TWIN BRIDGES PARK CAMPGROUND

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...LITTLE VOLGA 
RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS WITH FAST 
FLOWING WATER CAN BECOME UNSTABLE AND UNSAFE. DO NOT WALK OR DRIVE 
THROUGH AREAS WITH FAST FLOWING WATER.

&&

LAT...LON 4282 9184 4273 9177 4272 9185 4282 9192

$$

RRS
450 
WGUS73 KARX 151224
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
724 AM CDT MON JUN 15 2015

IAC065-151231-
/O.EXP.KARX.FF.W.0001.000000T0000Z-150615T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FAYETTE IA-
724 AM CDT MON JUN 15 2015

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL FAYETTE COUNTY WILL
EXPIRE AT 730 AM CDT...

S OF 720 AM NO FLASH FLOODING HAD BEEN REPORTED AND FLASH FLOODING 
IS NO LONGER EXPECTED TO POSE A THREAT.

LAT...LON 4282 9184 4273 9177 4272 9185 4282 9192

$$

RRS

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 15, 1:28 PM CDTSpecial Weather StatementARXAllamakee, Fayette92 min

Nearby

Flash Flood Warnings in Iowa, 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.