Alert archive / Iowa / Flash Flood Warnings in 2009

Flash Flood Warning 13, NWS Quad Cities, IA

June 19, 20094 counties in Iowa

NWS Quad Cities, IA issued this flash flood warning at Jun 19, 2009, 4:48 PM CDT for 4 counties in Iowa. It was in force for 3 hr. 2 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: Jun 19, 2009, 4:48 PM CDT (21:48 UTC)
Expired: Jun 19, 2009, 7:41 PM CDT
In force: 3 hr
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: None

Counties Cedar County, IA, Clinton County, IA, Jackson County, IA, Jones County, IA

The radar

The Quad Cities radar (KDVN), 50 km from the middle of the area, began a volume at 21:48 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

Time	Report	Where	Remark
Jun 19, 5:30 PM CDT	FLASH FLOOD	Stanwood, IA	STREETS IN TOWN FLOODED UP TO 1 FOOT DEEP. 3 INCHES OF RAIN IN ONE HOUR.
Jun 19, 6:30 PM CDT	FLASH FLOOD	Maquoketa, IA	MANY STREETS IN TOWN FLOODED.

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 12:00Z, 9.8 hours before the alert went out and 50 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2575 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 810 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 10.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KDVN 192148
FFWDVN
IAC031-045-097-105-200345-
/O.NEW.KDVN.FF.W.0013.090619T2148Z-090620T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
448 PM CDT FRI JUN 19 2009

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CEDAR COUNTY IN EAST CENTRAL IOWA...
  THIS INCLUDES THE CITY OF TIPTON...
  CLINTON COUNTY IN EAST CENTRAL IOWA...
  JACKSON COUNTY IN EAST CENTRAL IOWA...
  THIS INCLUDES THE CITY OF MAQUOKETA...
  SOUTHERN JONES COUNTY IN EAST CENTRAL IOWA...

* UNTIL 1045 PM CDT

* AT 446 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WHEATLAND...WYOMING...WELTON...TORONTO...STANWOOD...SPRINGBROOK...
  SPRAGUEVILLE...SABULA...PRESTON...OXFORD JUNCTION...ONSLOW...
  OLIN...NASHVILLE...MORLEY...MONMOUTH...MILES...MECHANICSVILLE...
  MARTELLE...LOWDEN...LOST NATION...HURSTVILLE...GREEN ISLAND...
  FULTON...DELMAR...CLARENCE...CHARLOTTE...BELLEVUE AND ANDREW

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE ON FLOODED ROADS. MOST FATALITIES OCCUR IN VEHICLES
SWEPT AWAY IN FLOOD WATERS AS SHALLOW AS 1 FOOT.

PLEASE REPORT ANY FLOODING OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT
AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4228 9042 4224 9041 4221 9036 4216 9024
      4209 9016 4205 9017 4202 9014 4177 9091
      4173 9091 4170 9137 4202 9137 4230 9042

$$

ERVIN

2 follow-up statements

000 
WGUS73 KDVN 192340
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
640 PM CDT FRI JUN 19 2009

IAC031-045-097-105-200345-
/O.CON.KDVN.FF.W.0013.000000T0000Z-090620T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON IA-JONES IA-CLINTON IA-CEDAR IA-
640 PM CDT FRI JUN 19 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
NORTHERN CEDAR...NORTHERN CLINTON...SOUTHERN JONES AND JACKSON
COUNTIES...

AT 635 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED  WATER OVER 
ROADS IN MAQUOKETA. FLASH FLOODING IS LIKELY IN LOW LYING AREAS AND 
MAY IMPACT COUNTY ROADS THROUGHOUT MUCH OF NORTHERN CEDAR...NORTHERN 
CLINTON...AND SOUTHERN JACKSON COUNTIES. 3 INCHES OF RAIN FELL IN A 
SHORT TIME IN STANWOOD IOWA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MILES...
PRESTON...WYOMING...SPRINGBROOK...SPRAGUEVILLE...SABULA...ONSLOW...
NASHVILLE...MONMOUTH...MAQUOKETA...HURSTVILLE...GREEN ISLAND...
FULTON...BELLEVUE AND ANDREW

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE ON FLOODED ROADS. MOST FATALITIES OCCUR IN VEHICLES
SWEPT AWAY IN FLOOD WATERS AS SHALLOW AS 1 FOOT.

PLEASE REPORT ANY FLOODING OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT
AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4228 9042 4224 9041 4221 9036 4216 9024
      4209 9016 4205 9017 4202 9014 4177 9091
      4173 9091 4170 9137 4202 9137 4230 9042

$$

ERVIN

000 
WGUS73 KDVN 200041
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
741 PM CDT FRI JUN 19 2009

IAC031-045-097-105-200051-
/O.CAN.KDVN.FF.W.0013.000000T0000Z-090620T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON IA-JONES IA-CLINTON IA-CEDAR IA-
741 PM CDT FRI JUN 19 2009

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN CEDAR...
NORTHERN CLINTON...SOUTHERN JONES AND JACKSON COUNTIES...

AT 741 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THE 
THUNDERSTORMS PRODUCING FLASH FLOODING HAVE EXITED THE WARNED AREA. 
THE THREAT FOR ADDITIONAL HEAVY RAIN HAS ENDED. THEREFORE...THE 
FLASH FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 4228 9042 4224 9041 4221 9036 4216 9024
      4209 9016 4205 9017 4202 9014 4177 9091
      4173 9091 4170 9137 4202 9137 4230 9042

$$

TGP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 9:17 PM CDT	River Flood Warning	DVN	Lee	24 hr
Jun 19, 7:00 AM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Johnson, Linn	60 min
Jun 19, 7:28 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan	32 min
Jun 19, 7:45 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware, Dubuque, Jones, Linn	60 min
Jun 19, 8:17 AM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jackson, Jones	58 min
Jun 19, 8:33 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Jackson	57 min
Jun 19, 9:02 AM CDT	Severe Thunderstorm Warning	DVN	Dubuque	58 min
Jun 19, 4:00 PM CDT	Tornado Warning	DVN	Des Moines, Lee	45 min
Jun 19, 4:19 PM CDT	Severe Thunderstorm Warning	DVN	Lee, Van Buren	56 min
Jun 19, 4:24 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Keokuk, Van Buren, Washington	54 min
Jun 19, 4:36 PM CDT	Flash Flood Warning	DVN	Benton, Cedar, Iowa, Johnson, Linn	3 hr
Jun 19, 4:42 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Keokuk, Louisa, Muscatine, Washington	46 min
Jun 19, 5:03 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee, Louisa	72 min
Jun 19, 5:03 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Johnson, Louisa, Muscatine, Scott, Washington	57 min
Jun 19, 5:12 PM CDT	Flash Flood Warning	DVN	Cedar, Clinton, Louisa, Muscatine, Scott	91 min
Jun 19, 5:28 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Muscatine, Scott	62 min

Nearby

Flash Flood Warnings in Iowa, 2009 Every flash flood warning in 2009

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.