Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 28, NWS Quad Cities, IA

September 23, 2016Buchanan County, Delaware County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Sep 23, 2016, 3:38 AM CDT for Buchanan County, Delaware County, 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 23, 2016, 3:38 AM CDT (08:38 UTC)
Expired
Sep 23, 2016, 9:30 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

The radar

The Quad Cities radar (KDVN), 129 km from the middle of the area, began a volume at 08:37 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 23, 7:00 AM CDTHEAVY RAIN 2.125 Wsw Hopkinton, IA24-HOUR RAINFALL
Sep 23, 7:00 AM CDTHEAVY RAIN 3.56Ne Hopkinton, IA24-HOUR RAINFALL
Sep 23, 7:40 AM CDTHEAVY RAIN 5.69Manchester, IA24-HOUR TOTAL

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, 8.6 hours before the alert went out and 132 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.

153 
WGUS53 KDVN 230838
FFWDVN
IAC019-055-231430-
/O.NEW.KDVN.FF.W.0028.160923T0838Z-160923T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL
338 AM CDT FRI SEP 23 2016

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BUCHANAN COUNTY IN NORTHEASTERN IOWA...              
  DELAWARE COUNTY IN NORTHEASTERN IOWA...

* UNTIL 930 AM CDT

* AT 333 AM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH
  FLOODING ACROSS THE AREA. 4 TO 6 INCHES OF RAIN HAVE FALLEN WITH
  ISOLATED TOTALS IN EXCESS OF 8 INCHES. FLASH FLOODING IS ALREADY
  OCCURRING!

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MANCHESTER...DYERSVILLE...FAIRBANK...EDGEWOOD...WINTHROP...
  HAZLETON...EARLVILLE...HOPKINTON...LAMONT...DELHI...RYAN...
  GREELEY...AURORA...DUNDEE...DELAWARE...MASONVILLE...STANLEY...
  ONEIDA...FONTANA PARK AND DELAWARE COUNTY FAIRGROUNDS.

ADDITIONAL RAINFALL AMOUNTS OF HALF AN INCH ARE POSSIBLE IN THE
WARNED AREA.

FLOOD WATERS ARE MOVING DOWN THE MAQUOKETA RIVER AND ITS TRIBUTARIES
IN BUCHANAN AND DELAWARE COUNTIES. RAPID RISES ARE OCCURRING AND
FLOODING OF ADDITIONAL ROADWAYS WILL LIKELY OCCUR!  IF YOU LIVE
ALONG THESE RIVERS SEEK HIGHER GROUND NOW!

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 4265 9133 4252 9113 4230 9114 4230 9157
      4246 9180 4261 9208 4264 9208

$$

GIBBS
2 follow-up statements
311 
WGUS73 KDVN 231047
FFSDVN

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

IAC019-055-231430-
/O.CON.KDVN.FF.W.0028.000000T0000Z-160923T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BUCHANAN IA-DELAWARE IA-
547 AM CDT FRI SEP 23 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 AM CDT FOR
NORTHERN BUCHANAN AND DELAWARE COUNTIES...

AT 545 AM CDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN THE
WARNED AREA. 4 TO 6 INCHES OF RAIN HAVE FALLEN. FLASH FLOODING IS
ALREADY OCCURRING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MANCHESTER...DYERSVILLE...FAIRBANK...EDGEWOOD...WINTHROP...
HAZLETON...EARLVILLE...HOPKINTON...LAMONT...DELHI...RYAN...GREELEY...
AURORA...DUNDEE...DELAWARE...MASONVILLE...STANLEY...ONEIDA...
FONTANA PARK AND DELAWARE COUNTY FAIRGROUNDS.

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 4265 9133 4252 9113 4230 9114 4230 9157
      4246 9180 4261 9208 4264 9208

$$

GIBBS
198 
WGUS73 KDVN 231428
FFSDVN

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

IAC019-055-231435-
/O.EXP.KDVN.FF.W.0028.000000T0000Z-160923T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BUCHANAN IA-DELAWARE IA-
928 AM CDT FRI SEP 23 2016

...THE FLASH FLOOD WARNING FOR NORTHERN BUCHANAN AND DELAWARE
COUNTIES WILL EXPIRE AT 930 AM CDT... 

AT 925 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THE
AXIS OF HEAVY RAIN HAD SHIFTED WELL SOUTH TO THE INTERSTATE 80
CORRIDOR. HIGH WATER ALONG AREA STREAMS DUE TO OVERNIGHT RAINFALL
MOUNTS OF 4 TO 6 INCHES...HAS BEGUN TO RECEDE AND NO ADDITIONAL
HEAVY RAIN OR FLASH FLOODING IS EXPECTED THIS MORNING. 

HOWEVER...FLOODING WILL CONTINUE ALONG THE MAQUOKETA RIVER.
PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.


LAT...LON 4265 9133 4252 9113 4230 9114 4230 9157
      4246 9180 4261 9208 4264 9208

$$

SHEETS

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 22, 9:48 PM CDTFlash Flood WarningDVNBuchanan, Delaware, Dubuque, Jackson6 hr
Sep 23, 1:55 AM CDTSpecial Weather StatementDVNJones, Linn50 min
Sep 23, 2:42 AM CDTRiver Flood WarningDVNDelaware, Jones57 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.