Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 10, NWS Quad Cities, IA

July 6, 2016Jones County, Linn County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Jul 6, 2016, 2:08 AM CDT for Jones County, Linn County, Iowa. It was in force for 4 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
Jul 6, 2016, 2:08 AM CDT (07:08 UTC)
Expired
Jul 6, 2016, 6:00 AM CDT
In force
4 hr
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Flood severity
None

Counties Jones County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 105 km from the middle of the area, began a volume at 07:12 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
Jul 6, 2:55 AM CDTHEAVY RAIN 1.561 S Monticello Municipa, IAAWOS STATION MONTICELLO ARPT /MXO/.
Jul 6, 6:00 AM CDTHEAVY RAIN 1.661 Nnw Center Point, IACOCORAHS STATION CENTER POINT /IA-LN-30/.
Jul 6, 6:00 AM CDTHEAVY RAIN 2.322 Ese Fairview, IACO-OP OBSERVER STATION 3 SSW ANAMOSA /AMOI4/.

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, 7.1 hours before the alert went out and 109 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 2016-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1788 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 2016-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
1788 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
1054 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.7

Open this sounding in Storm Lab

The text

As transmitted.

581 
WGUS53 KDVN 060708
FFWDVN
IAC105-113-061100-
/O.NEW.KDVN.FF.W.0010.160706T0708Z-160706T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
208 AM CDT WED JUL 6 2016

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JONES COUNTY IN EAST CENTRAL IOWA... 
  NORTHERN LINN COUNTY IN EAST CENTRAL IOWA...

* UNTIL 600 AM CDT
            
* AT 205 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN...ESPECIALLY IN THE BUFFALO CREEK AREA.  FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.   

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4230 9174 4229 9105 4205 9107 4210 9183
      4230 9183

$$

DMD
2 follow-up statements
149 
WGUS73 KDVN 060931
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
431 AM CDT WED JUL 6 2016

IAC105-113-061100-
/O.CON.KDVN.FF.W.0010.000000T0000Z-160706T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JONES IA-LINN IA-
431 AM CDT WED JUL 6 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 AM CDT FOR
JONES AND NORTHERN LINN COUNTIES...

AT 429 AM CDT...EMERGENCY MANAGEMENT REPORTED THAT SOME LOCAL CREEKS
WERE RISING RAPIDLY.  OVER THREE INCHES OF RAIN HAVE FALLEN IN THE
AREA...AND FLASH FLOODING IS LIKELY ON AREA CREEKS.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.  IF YOU ENCOUNTER WATER OVER A ROAD...TURN
AROUND AND FIND ANOTHER ROUTE.

&&

LAT...LON 4230 9174 4229 9105 4205 9107 4210 9183
      4230 9183

$$

DMD
222 
WGUS73 KDVN 060946
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
446 AM CDT WED JUL 6 2016

IAC105-113-060955-
/O.CAN.KDVN.FF.W.0010.000000T0000Z-160706T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JONES IA-LINN IA-
446 AM CDT WED JUL 6 2016

...THE FLASH FLOOD WARNING FOR JONES AND NORTHERN LINN
COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.

LAT...LON 4230 9174 4229 9105 4205 9107 4210 9183
      4230 9183

$$

DMD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 11:17 PM CDTSpecial Weather StatementDVNBuchanan, Delaware, Dubuque73 min
Jul 6, 12:08 AM CDTSpecial Weather StatementDVNBenton, Jones, Linn82 min
Jul 6, 12:38 AM CDTSpecial Weather StatementDVNJackson52 min
Jul 6, 12:50 AM CDTSevere Thunderstorm WarningDVNJackson40 min
Jul 6, 1:20 AM CDTSpecial Weather StatementDVNJackson, Jones, Linn55 min
Jul 6, 1:26 AM CDTSevere Thunderstorm WarningDVNClinton64 min
Jul 6, 1:29 AM CDTSevere Thunderstorm WarningDVNJackson, Jones34 min
Jul 6, 1:51 AM CDTSpecial Weather StatementDVNBenton, Buchanan, Iowa, Johnson, Linn54 min
Jul 6, 2:42 AM CDTSevere Thunderstorm WarningDVNCedar, Clinton, Jackson, Johnson, Jones, Linn and 2 more48 min
Jul 6, 2:46 AM CDTSevere Thunderstorm WarningDVNDelaware, Dubuque, Jackson, Jones, Linn44 min
Jul 6, 3:06 AM CDTSevere Thunderstorm WarningDVNClinton, Jackson, Scott54 min
Jul 6, 3:09 AM CDTSevere Thunderstorm WarningDVNJohnson, Louisa, Muscatine, Scott51 min
Jul 6, 4:37 AM CDTSpecial Weather StatementDVNHenry, Jefferson53 min
Jul 6, 5:17 AM CDTSpecial Weather StatementDVNCedar, Clinton, Jones, Linn, Scott88 min
Jul 6, 8:42 AM CDTSpecial Weather StatementDVNJefferson63 min
Jul 6, 9:41 AM CDTSpecial Weather StatementDVNDes Moines, Henry, Jefferson, Washington64 min
Jul 6, 10:29 AM CDTSpecial Weather StatementDVNLee61 min
Jul 6, 10:38 AM CDTRiver Flood WatchDVNClinton, Scott4 days
Jul 6, 3:58 PM CDTRiver Flood WarningDVNClinton, Scott3 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.