Alert archive / Iowa / Flash Flood Warnings in 2020

Flash Flood Warning 13, NWS Quad Cities, IA

June 4, 2020Muscatine County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Jun 4, 2020, 9:41 PM CDT for Muscatine County, Iowa. It was in force for 97 min. 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 4, 2020, 9:41 PM CDT (02:41 UTC)
Expired: Jun 4, 2020, 11:18 PM CDT
In force: 97 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: None

County Muscatine County, IA

The radar

The Quad Cities radar (KDVN), 37 km from the middle of the area, began a volume at 02:40 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 4, 9:46 PM CDT	FLASH FLOOD	4 Wnw Sweetland Center, IA	WATER FLOWING OVER HIGHWAY 38.

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, 2.7 hours before the alert went out and 44 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: 1495 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1653 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

902 
WGUS53 KDVN 050241
FFWDVN
IAC139-050845-
/O.NEW.KDVN.FF.W.0013.200605T0241Z-200605T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Quad Cities IA/IL
941 PM CDT Thu Jun 4 2020

The National Weather Service in the Quad Cities has issued a

* Flash Flood Warning for...
  Northeastern Muscatine County in east central Iowa...

* Until 345 AM CDT Friday.

* At 938 PM CDT, Doppler radar indicated a slow moving thunderstorm 
  in Muscatine County. Up to two inches of rain have already fallen 
  between Sweetlan Center and Wilton. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Durant, Wilton, Stockton, Wildcat Den State Park, New Era, Pleasant
  Prairie and Sweetland Center.

Additional rainfall amounts of 1 to 3 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.

&&

LAT...LON 4155 9111 4154 9106 4160 9106 4160 9086
      4148 9084 4144 9089 4149 9110 4153 9112

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR

$$

Uttech

2 follow-up statements

449 
WGUS73 KDVN 050309
FFSDVN

Flash Flood Statement
National Weather Service Quad Cities IA/IL
1009 PM CDT Thu Jun 4 2020

IAC139-050845-
/O.CON.KDVN.FF.W.0013.000000T0000Z-200605T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Muscatine IA-
1009 PM CDT Thu Jun 4 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM CDT FRIDAY
FOR NORTHEASTERN MUSCATINE COUNTY...

At 1008 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to three inches of rain have already 
fallen between Sweetland Center and Wilton. Flash flooding is 
ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flooding of small creeks and streams, urban areas, 
         highways, streets and underpasses as well as other drainage 
         and low lying areas.

Some locations that will experience flooding include...
Durant, Wilton, Stockton, Wildcat Den State Park, New Era, Pleasant
Prairie and Sweetland 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.

&&

LAT...LON 4160 9106 4160 9086 4148 9084 4144 9089
      4148 9106

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR

$$

Uttech

453 
WGUS73 KDVN 050418
FFSDVN

Flash Flood Statement
National Weather Service Quad Cities IA/IL
1118 PM CDT Thu Jun 4 2020

IAC139-050427-
/O.CAN.KDVN.FF.W.0013.000000T0000Z-200605T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Muscatine IA-
1118 PM CDT Thu Jun 4 2020

...THE FLASH FLOOD WARNING FOR NORTHEASTERN MUSCATINE COUNTY 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 4160 9106 4160 9086 4148 9084 4144 9089
      4148 9106

$$

Uttech

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 7:20 PM CDT	Special Weather Statement	DVN	Linn	25 min
Jun 4, 7:40 PM CDT	Special Weather Statement	DVN	Cedar	35 min
Jun 4, 8:13 PM CDT	Special Weather Statement	DVN	Cedar	32 min
Jun 4, 8:16 PM CDT	Flash Flood Warning	DVN	Cedar, Muscatine	3 hr
Jun 4, 9:01 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Scott	44 min
Jun 4, 9:11 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Muscatine, Scott	49 min
Jun 4, 9:40 PM CDT	Severe Thunderstorm Warning	DVN	Scott	50 min
Jun 4, 9:56 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine, Scott	49 min
Jun 4, 10:11 PM CDT	Severe Thunderstorm Warning	DVN	Scott	49 min
Jun 4, 10:17 PM CDT	Flash Flood Warning	DVN	Scott	119 min
Jun 5, 12:08 AM CDT	Special Weather Statement	DVN	Buchanan	52 min
Jun 5, 12:38 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	52 min
Jun 5, 1:12 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	48 min
Jun 5, 2:38 AM CDT	Special Weather Statement	DVN	Delaware	37 min
Jun 5, 6:18 AM CDT	Special Weather Statement	DVN	Iowa	42 min
Jun 5, 6:35 AM CDT	Special Weather Statement	DVN	Keokuk	40 min
Jun 5, 6:44 AM CDT	Special Weather Statement	DVN	Van Buren	46 min
Jun 5, 7:06 AM CDT	Special Weather Statement	DVN	Keokuk, Washington	114 min
Jun 5, 7:21 AM CDT	Special Weather Statement	DVN	Henry	39 min
Jun 5, 7:27 AM CDT	Severe Thunderstorm Warning	DVN	Henry, Washington	34 min
Jun 5, 7:43 AM CDT	Severe Thunderstorm Warning	DVN	Des Moines	32 min
Jun 5, 10:36 AM CDT	River Flood Warning	DVN	Louisa	4 days

Nearby

Flash Flood Warnings in Iowa, 2020 Every flash flood warning in 2020

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.