Alert archive / Iowa / Flash Flood Watches in 2020

Flash Flood Watch 5, NWS Quad Cities, IA

June 22, 202011 counties in Iowa

NWS Quad Cities, IA issued this flash flood watch at Jun 22, 2020, 10:03 AM CDT for 11 counties in Iowa. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jun 22, 2020, 10:03 AM CDT (15:03 UTC)
Expired: Jun 22, 2020, 7:00 PM CDT
In force: 9 hr
Issued by: NWS Quad Cities, IA
Flood severity: None

Counties Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 82 km from the middle of the area, began a volume at 15:06 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

Davenport, (KDVN), launched 12:00Z, 3.1 hours before the alert went out and 87 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: 640 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this flash flood watch went out at Jun 22, 6:48 AM CDT, 3 hours 15 minutes earlier.

Area forecast discussion, Jun 22, 6:48 AM CDT, 3 hours 15 minutes before

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Hazardous weather outlook, Jun 22, 4:55 AM CDT, 5 hours 8 minutes before

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In the hours before

Local storm report, Jun 22, 8:19 AM CDT, 1 hour 44 minutes before

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Local storm report, Jun 22, 8:20 AM CDT, 1 hour 43 minutes before

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Local storm report, Jun 22, 8:27 AM CDT, 1 hour 36 minutes before

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Local storm report, Jun 22, 8:48 AM CDT, 1 hour 15 minutes before

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Local storm report, Jun 22, 8:49 AM CDT, 1 hour 14 minutes before

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Local storm report, Jun 22, 8:55 AM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
855 AM CDT MON JUN 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0840 AM     HEAVY RAIN       4 N FAIRFAX             41.97N 91.77W
06/22/2020  M1.40 INCH       LINN               IA   TRAINED SPOTTER

            12-HR RAINFALL TOTAL.

&&

PS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 10:31 PM CDT	Special Weather Statement	DVN	Buchanan	44 min
Jun 21, 11:02 PM CDT	Special Weather Statement	DVN	Benton, Buchanan, Delaware	43 min
Jun 21, 11:28 PM CDT	Special Weather Statement	DVN	Benton, Buchanan	47 min
Jun 21, 11:58 PM CDT	Special Weather Statement	DVN	Benton, Delaware	47 min
Jun 22, 12:51 AM CDT	Special Weather Statement	DVN	Benton, Delaware, Dubuque, Jones, Linn	54 min
Jun 22, 1:40 AM CDT	Special Weather Statement	DVN	Dubuque, Jackson, Jones	65 min
Jun 22, 1:43 AM CDT	Special Weather Statement	DVN	Benton, Buchanan	62 min
Jun 22, 2:18 AM CDT	Special Weather Statement	DVN	Iowa	57 min
Jun 22, 2:54 AM CDT	Special Weather Statement	DVN	Buchanan	51 min
Jun 22, 3:12 AM CDT	Special Weather Statement	DVN	Iowa, Johnson, Keokuk	63 min
Jun 22, 3:35 AM CDT	Flash Flood Warning	DVN	Buchanan	6 hr
Jun 22, 3:44 AM CDT	Special Weather Statement	DVN	Washington	46 min
Jun 22, 4:23 AM CDT	Special Weather Statement	DVN	Henry, Jefferson, Louisa, Muscatine, Washington	52 min
Jun 22, 5:24 AM CDT	Special Weather Statement	DVN	Cedar, Clinton, Des Moines, Louisa, Muscatine, Scott	66 min
Jun 22, 6:12 AM CDT	Special Weather Statement	DVN	Clinton, Scott	63 min
Jun 22, 9:19 AM CDT	River Flood Warning	DVN	Clinton, Scott	12 days
Jun 22, 9:19 AM CDT	River Flood Warning	DVN	Linn	6 days
Jun 22, 9:19 AM CDT	River Flood Warning	DVN	Cedar, Johnson, Linn	7 days
Jun 22, 9:19 AM CDT	River Flood Warning	DVN	Cedar, Johnson	7 days
Jun 22, 9:19 AM CDT	River Flood Warning	DVN	Cedar, Louisa, Muscatine	21 days
Jun 22, 9:19 AM CDT	River Flood Warning	DVN	Benton, Iowa	9 days
Jun 22, 9:19 AM CDT	River Flood Warning	DVN	Johnson, Washington	13 hr
Jun 22, 9:58 AM CDT	Areal Flood Warning	DVN	Benton, Buchanan	24 hr
Jun 22, 2:36 PM CDT	Special Weather Statement	DVN	Des Moines	24 min
Jun 22, 2:52 PM CDT	River Flood Warning	DVN	Cedar, Jones, Linn	6 days
Jun 22, 2:56 PM CDT	River Flood Warning	DVN	Keokuk	41 hr
Jun 22, 2:59 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry	46 min
Jun 22, 3:13 PM CDT	River Flood Warning	DVN	Benton, Linn	4 days
Jun 22, 3:21 PM CDT	River Flood Warning	DVN	Louisa	21 days
Jun 22, 3:21 PM CDT	River Flood Warning	DVN	Louisa	11 days
Jun 22, 4:02 PM CDT	Special Weather Statement	DVN	Lee	58 min
Jun 22, 4:12 PM CDT	Severe Thunderstorm Warning	DVN	Lee	63 min
Jun 22, 3:44 PM CDT	Special Weather Statement	DVN	Henderson, Warren	46 min
Jun 22, 4:18 PM CDT	Severe Thunderstorm Warning	DVN	Putnam	27 min
Jun 22, 4:49 PM CDT	Special Weather Statement	DVN	Putnam	26 min
Jun 22, 4:53 PM CDT	Special Weather Statement	DVN	McDonough	37 min
Jun 22, 4:56 PM CDT	Special Weather Statement	DVN	Carroll	34 min
Jun 22, 5:04 PM CDT	Flash Flood Warning	DVN	Hancock, McDonough	3 hr
Jun 22, 5:16 PM CDT	Special Weather Statement	DVN	McDonough	14 min
Jun 22, 2:34 PM CDT	Special Weather Statement	DVN	Scotland	26 min
Jun 22, 3:22 PM CDT	Special Weather Statement	DVN	Clark, Scotland	38 min

Nearby

Flash Flood Watches in Iowa, 2020 Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.