Alert archive / Iowa / Flash Flood Warnings in 2004

Flash Flood Warning 3, NWS Quad Cities, IA

May 21, 2004Jones County, Iowa

NWS Quad Cities, IA issued this flash flood warning at May 21, 2004, 5:51 PM CDT for Jones 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: May 21, 2004, 5:51 PM CDT (22:51 UTC)
Expired: May 21, 2004, 11:45 PM CDT
In force: 6 hr
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Jones County, IA

The radar

The Quad Cities radar (KDVN), 74 km from the middle of the area, began a volume at 22:51 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.9 hours before the alert went out and 307 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: 2541 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 923 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDVN 212251
FFWDVN
IAC105-220445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
551 PM CDT FRI MAY 21 2004

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

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

* UNTIL 1145 PM CDT

* AT 541 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN EXTENDING FROM MARTELLE TO TEMPLE HILL TO WYOMING 
  FROM A CLUSTER OF THUNDERSTORMS EXTENDING FROM MARTELLE TO TEMPLE 
  HILL...MOVING EAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WYOMING...
  CENTER JUNCTION...OXFORD JUNCTION...ONSLOW...OLIN...MORLEY...
  MARTELLE AND HALE.

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

FLOODING OF SMALL STREAMS AND CREEKS...HIGHWAYS AND STREETS...
UNDERPASSES AND LOWLYING URBAN AND RURAL AREAS IS LIKELY.

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

LAT...LON 4196 9138 4196 9092 4230 9091 4229 9115
          4215 9137

$$

LRE

1 follow-up statement

000 
WGUS73 KDVN 212359
FFSDVN
IAC105-220445-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
659 PM CDT FRI MAY 21 2004

...A FLASH FLOOD WARNING CONTINUES UNTIL 1145 PM CDT FOR JONES
COUNTY...

AT 647 PM CDT...DOPPLER RADAR INDICATED THAT THUNDERSTORMS PRODUCING 
VERY HEAVY RAIN HAVE MOVED EAST OUT OF JONES COUNTY...WITH ONLY A FEW 
LIGHT RAIN SHOWERS LINGERING OVER THE AREA. HOWEVER...FLOODING LIKELY 
CONTINUES IN JONES COUNTY...ESPECIALLY OVER THE SOUTHERN HALF OF THE
COUNTY.

CITIES THAT MAY BE AFFECTED BY FLOODING...ANAMOSA...MARTELLE...
FAIRVIEW AND MORELY.

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

FLOODING OF SMALL STREAMS AND CREEKS...HIGHWAYS AND STREETS...
UNDERPASSES AND LOWLYING URBAN AND RURLAL AREAS IS LIKELY.

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

LAT...LON 4196 9138 4196 9092 4230 9091 4229 9115
          4215 9137

$$

LRE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 7:13 PM CDT	Severe Thunderstorm Warning	DVN	Johnson, Washington	62 min
May 20, 7:41 PM CDT	Severe Thunderstorm Warning	DVN	Louisa	64 min
May 20, 7:54 PM CDT	Severe Thunderstorm Warning	DVN	Cedar	66 min
May 21, 6:28 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	62 min
May 21, 3:26 PM CDT	Tornado Warning	DVN	Buchanan	64 min
May 21, 3:27 PM CDT	Severe Thunderstorm Warning	DVN	Benton	48 min
May 21, 3:38 PM CDT	Tornado Warning	DVN	Benton	37 min
May 21, 4:12 PM CDT	Tornado Warning	DVN	Linn	63 min
May 21, 4:14 PM CDT	Tornado Warning	DVN	Benton	31 min
May 21, 4:43 PM CDT	Flash Flood Warning	DVN	Benton, Buchanan, Delaware, Linn	6 hr
May 21, 4:44 PM CDT	Severe Thunderstorm Warning	DVN	Benton	61 min
May 21, 4:48 PM CDT	Tornado Warning	DVN	Benton	57 min
May 21, 4:51 PM CDT	Severe Thunderstorm Warning	DVN	Delaware	54 min
May 21, 5:05 PM CDT	Tornado Warning	DVN	Jones	55 min
May 21, 5:21 PM CDT	Severe Thunderstorm Warning	DVN	Linn	54 min
May 21, 5:38 PM CDT	Tornado Warning	DVN	Clinton, Jackson	67 min
May 21, 5:56 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Jones	64 min

Nearby

Flash Flood Warnings in Iowa, 2004 Every flash flood warning in 2004

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.