Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 9, NWS Quad Cities, IA

June 22, 20164 counties in Iowa

NWS Quad Cities, IA issued this flash flood warning at Jun 22, 2016, 4:18 AM CDT for 4 counties in Iowa. It was in force for 6 hr. 1 report 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 22, 2016, 4:18 AM CDT (09:18 UTC)
Expired: Jun 22, 2016, 10:15 AM CDT
In force: 6 hr
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: None

Counties Johnson County, IA, Louisa County, IA, Muscatine County, IA, Washington County, IA

The radar

The Quad Cities radar (KDVN), 74 km from the middle of the area, began a volume at 09:17 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 22, 8:08 AM CDT	HEAVY RAIN 3.5	4 N Cotter, IA

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, 9.3 hours before the alert went out and 81 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2283 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

347 
WGUS53 KDVN 220918
FFWDVN
IAC103-115-139-183-221515-
/O.NEW.KDVN.FF.W.0009.160622T0918Z-160622T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
418 AM CDT WED JUN 22 2016

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN JOHNSON COUNTY IN EAST CENTRAL IOWA...
  NORTHWESTERN LOUISA COUNTY IN SOUTHEASTERN IOWA...
  WESTERN MUSCATINE COUNTY IN EAST CENTRAL IOWA...
  NORTHEASTERN WASHINGTON COUNTY IN SOUTHEASTERN IOWA...

* UNTIL 1015 AM CDT

* AT 417 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. 3 TO 5 INCHES OF RAIN HAVE
  FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WEST LIBERTY...LONE TREE...RIVERSIDE...CONESVILLE...NICHOLS...
  GLADWIN...MUSCATINE COUNTY FAIRGROUNDS...
  RIVER JUNCTION AND SHARON CENTER.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 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.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 4157 9168 4151 9138 4159 9138 4159 9125
      4149 9125 4133 9132 4133 9150 4150 9167

$$

GIBBS

1 follow-up statement

248 
WGUS73 KDVN 221244
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
744 AM CDT WED JUN 22 2016

IAC103-115-139-183-221252-
/O.CAN.KDVN.FF.W.0009.000000T0000Z-160622T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JOHNSON IA-LOUISA IA-MUSCATINE IA-WASHINGTON IA-
744 AM CDT WED JUN 22 2016

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN JOHNSON...NORTHWESTERN
LOUISA...WESTERN MUSCATINE AND NORTHEASTERN WASHINGTON COUNTIES IS
CANCELLED...

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

LAT...LON 4157 9168 4151 9138 4159 9138 4159 9125
      4149 9125 4133 9132 4133 9150 4150 9167

$$

RP KINNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 10:06 PM CDT	Special Weather Statement	DVN	Jefferson, Van Buren	24 min
Jun 21, 11:13 PM CDT	Special Weather Statement	DVN	Iowa	32 min
Jun 21, 11:16 PM CDT	Special Weather Statement	DVN	Jefferson, Keokuk, Washington	59 min
Jun 22, 12:00 AM CDT	Special Weather Statement	DVN	Keokuk, Washington	30 min
Jun 22, 1:37 AM CDT	Flash Flood Warning	DVN	Benton, Iowa, Johnson, Linn	6 hr
Jun 22, 2:56 AM CDT	Special Weather Statement	DVN	Louisa	49 min
Jun 22, 3:02 AM CDT	Severe Thunderstorm Warning	DVN	Louisa	43 min
Jun 22, 3:07 AM CDT	Special Weather Statement	DVN	Johnson	38 min
Jun 22, 3:22 AM CDT	Severe Thunderstorm Warning	DVN	Des Moines	53 min
Jun 22, 4:23 AM CDT	River Flood Warning	DVN	Cedar, Louisa, Muscatine	3 days
Jun 22, 4:23 AM CDT	Heat Advisory	DVN	Des Moines, Henry, Jefferson, Lee, Van Buren	15 hr
Jun 22, 9:13 AM CDT	Special Weather Statement	DVN	Benton, Cedar, Johnson, Linn, Louisa, Muscatine	3 hr
Jun 22, 9:54 AM CDT	River Flood Watch	DVN	Louisa	63 hr
Jun 22, 9:54 AM CDT	River Flood Watch	DVN	Louisa	4 days
Jun 22, 9:54 AM CDT	River Flood Watch	DVN	Louisa	4 days
Jun 22, 6:25 PM CDT	Special Weather Statement	DVN	Clinton	35 min

Nearby

Flash Flood Warnings in Iowa, 2016 Every 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.