Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 27, NWS Quad Cities, IA

September 22, 20164 counties in Iowa

NWS Quad Cities, IA issued this flash flood warning at Sep 22, 2016, 9:48 PM CDT for 4 counties in Iowa. It was in force for 6 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Sep 22, 2016, 9:48 PM CDT (02:48 UTC)
Expired
Sep 23, 2016, 3:45 AM CDT
In force
6 hr
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Flood severity
None

Counties Buchanan County, IA, Delaware County, IA, Dubuque County, IA, Jackson County, IA

The radar

The Quad Cities radar (KDVN), 104 km from the middle of the area, began a volume at 02:51 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.

What was reported inside it

TimeReportWhereRemark
Sep 22, 10:00 PM CDTHEAVY RAIN 3Manchester, IADEPUTY MEASURED AMOUNT IN TOWN
Sep 22, 10:28 PM CDTFLASH FLOODDyersville, IAFLASH FLOODING FLOWING INTO HOMES BASEMENT. FIRE DEPARTMENT IS RESPONDING TO THE INCIDENT.
Sep 23, 12:08 AM CDTFLASH FLOODWorthington, IAEM REPORTS A COUPLE OF WASHED OUT ROADS IN SOUTHWEST DUBUQUE COUNTY FROM FLOODING. MOST CREEKS HAVE RETURNED TO THEIR BANKS AT THE CURRENT TIME.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.8 hours before the alert went out and 106 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 2016-09-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 580 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2016-09-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
580 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
1227 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

787 
WGUS53 KDVN 230248
FFWDVN
IAC019-055-061-097-230845-
/O.NEW.KDVN.FF.W.0027.160923T0248Z-160923T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL
948 PM CDT THU SEP 22 2016

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DUBUQUE COUNTY IN NORTHEASTERN IOWA...
  BUCHANAN COUNTY IN NORTHEASTERN IOWA...
  DELAWARE COUNTY IN NORTHEASTERN IOWA...
  NORTHWESTERN JACKSON COUNTY IN EAST CENTRAL IOWA...

* UNTIL 345 AM CDT

* AT 947 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  DUBUQUE...INDEPENDENCE...MANCHESTER...ASBURY...DYERSVILLE...
  CASCADE...EPWORTH...EAST DUBUQUE...FARLEY...PEOSTA...FAIRBANK...
  EDGEWOOD...WINTHROP...HAZLETON...EARLVILLE...HOPKINTON...
  QUASQUETON...LAMONT...DELHI AND NEW VIENNA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

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

&&

LAT...LON 4264 9072 4254 9064 4247 9065 4239 9049
      4222 9051 4225 9090 4230 9090 4231 9179
      4261 9208 4264 9208 4265 9090 4268 9089

$$

ERVIN
1 follow-up statement
615 
WGUS73 KDVN 230551
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL
1251 AM CDT FRI SEP 23 2016

IAC019-055-061-097-230845-
/O.CON.KDVN.FF.W.0027.000000T0000Z-160923T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DUBUQUE IA-BUCHANAN IA-DELAWARE IA-JACKSON IA-
1251 AM CDT FRI SEP 23 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM CDT FOR
DUBUQUE...BUCHANAN...DELAWARE AND NORTHWESTERN JACKSON COUNTIES...

AT 1243 AM CDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING DUE TO
HEAVY RAIN FROM THUNDERSTORMS OVER THE WARNED AREA. 2 TO 4 INCHES OF
RAIN HAVE FALLEN ACROSS THE WARNED AREA.  THE HEAVIEST RAIN HAS
FALLEN IN A LINE FROM STANLEY TO LAMONT TO ONEIDA...WHERE UPWARDS OF
6 INCHES HAVE FALLEN. FLASH FLOODING IS ONGOING AND EXPECTED TO
CONTINUE.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DUBUQUE...INDEPENDENCE...MANCHESTER...ASBURY...DYERSVILLE...
CASCADE...EPWORTH...EAST DUBUQUE...FARLEY...PEOSTA...FAIRBANK...
EDGEWOOD...WINTHROP...HAZLETON...EARLVILLE...HOPKINTON...
QUASQUETON...LAMONT...DELHI AND NEW VIENNA.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

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

&&

LAT...LON 4264 9072 4254 9064 4247 9065 4239 9049
      4222 9051 4225 9090 4230 9090 4231 9179
      4261 9208 4264 9208 4265 9090 4268 9089

$$

GIBBS

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 22, 8:59 PM CDTFlash Flood WatchDVNBenton, Buchanan, Delaware, Dubuque, Jackson, Jones and 1 more13 hr
Sep 23, 1:55 AM CDTSpecial Weather StatementDVNJones, Linn50 min
Sep 23, 2:42 AM CDTRiver Flood WarningDVNDelaware, Jones57 hr
Sep 23, 3:38 AM CDTFlash Flood WarningDVNBuchanan, Delaware6 hr
Sep 23, 4:24 AM CDTSpecial Weather StatementDVNIowa, Johnson51 min
Sep 23, 4:33 AM CDTFlash Flood WarningDVNBenton, Iowa, Johnson, Linn6 hr
Sep 23, 9:46 AM CDTRiver Flood WatchDVNJackson4 days
Sep 23, 10:26 AM CDTRiver Flood WarningDVNBuchanan, Linn6 days
Sep 23, 10:26 AM CDTRiver Flood WarningDVNCedar, Jones, Linn8 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNClinton, Scott12 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNScott11 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNMuscatine, Scott13 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNMuscatine14 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNLouisa, Muscatine15 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNLouisa16 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNDes Moines, Louisa17 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNDes Moines18 days
Sep 23, 11:56 AM CDTRiver Flood WarningDVNDes Moines, Lee18 days

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.