Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 22, NWS Des Moines, IA

August 28, 2016Ringgold County, Iowa

NWS Des Moines, IA issued this flash flood warning at Aug 28, 2016, 5:23 PM CDT for Ringgold County, Iowa. 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
Aug 28, 2016, 5:23 PM CDT (22:23 UTC)
Expired
Aug 28, 2016, 11:15 PM CDT
In force
6 hr
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Flood severity
None

County Ringgold County, IA

The radar

The Des Moines radar (KDMX), 116 km from the middle of the area, began a volume at 22:25 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

Omaha, NE (KOAX), launched 12:00Z, 10.4 hours before the alert went out and 180 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, Omaha, NE at 12:00Z on 2016-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1697 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, Omaha, NE at 12:00Z on 2016-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
1697 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
975 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

192 
WGUS53 KDMX 282223
FFWDMX
IAC159-290415-
/O.NEW.KDMX.FF.W.0022.160828T2223Z-160829T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
523 PM CDT SUN AUG 28 2016

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN RINGGOLD COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 1115 PM CDT

* AT 521 PM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH
  FLOODING IN THE WARNED AREA. MULTIPLE ROADS ARE CLOSED DUE TO
  FLOODING IN THE DIAGONAL AREA. UPWARDS OF 4 TO 6 INCHES OF RAIN
  HAD FALLEN IN THE AREA. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  DIAGONAL...TINGLEY AND SHANNON CITY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4068 9443 4083 9446 4090 9432 4090 9407

$$

SKOW
1 follow-up statement
775 
WGUS73 KDMX 290104
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
804 PM CDT SUN AUG 28 2016

IAC159-290113-
/O.CAN.KDMX.FF.W.0022.000000T0000Z-160829T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RINGGOLD IA-
804 PM CDT SUN AUG 28 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN RINGGOLD COUNTY IS
CANCELLED...

THE HEAVY RAIN HAS ENDED ACROSS THE COUNTY AND THE COUNTY EMERGENCY
MANAGER REPORTS THAT ALL PREVIOUSLY CLOSED ROADS HAVE BEEN REOPENED.
FLOODING IS NO LONGER EXPECTED TO POSE A THREAT.

LAT...LON 4068 9443 4083 9446 4090 9432 4090 9407

$$

SKOW

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 28, 4:25 PM CDTSpecial Weather StatementDMXRinggold50 min
Aug 28, 4:58 PM CDTSevere Thunderstorm WarningDMXGreene, Guthrie31 min
Aug 28, 6:15 PM CDTSpecial Weather StatementDMXPolk30 min

Nearby

Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016

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.