Alert archive / Iowa / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 38, NWS Quad Cities, IA

May 22, 2019Lee County, Iowa; Hancock County, Illinois; Clark County, Missouri

NWS Quad Cities, IA issued this severe thunderstorm warning at May 22, 2019, 7:46 PM CDT for Lee County, Iowa; Hancock County, Illinois; Clark County, Missouri. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 22, 2019, 7:46 PM CDT (00:46 UTC)
Expired: May 22, 2019, 8:30 PM CDT
In force: 44 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Lee County, IA, Hancock County, IL, Clark County, MO

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 22, 4:00 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.8 hours before the alert went out and 150 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: 296 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1412 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 330 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 22, 6:21 PM CDT, 1 hour 25 minutes earlier.

Area forecast discussion, May 22, 6:21 PM CDT, 1 hour 25 minutes before

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Hazardous weather outlook, May 22, 12:16 PM CDT, 7 hours 30 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
1216 PM CDT Wed May 22 2019

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-230945-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
1216 PM CDT Wed May 22 2019

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...TODAY AND TONIGHT

Thunderstorms will develop after 4 PM and continue tonight. Severe
thunderstorms will be possible late this afternoon through the
evening.  Supercell thunderstorms capable of large hail, damaging
winds and tornadoes are the main threats.  Heavy rainfall and
isolated flash flooding is also possible. Severe thunderstorms are
possible across the entire area, however the best chance for these
storms looks to be east of a line from Ottumwa, IA to Sterling, IL.

Area rivers are experiencing flooding. Please see the
latest Flood Statements and Flood Warnings for details.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

There is a daily chance of thunderstorms from Thursday through
Tuesday. The stronger storms will be capable of producing locally
heavy rainfall.

For Thursday the Storm Prediction Center has a marginal risk of
severe storms across parts of southeast Iowa, west central
Illinois and northeast Missouri. If severe storms develop, they
would be at night. Damaging winds and large hail would be the
primary risks.

For Friday there is a slight risk of severe storms for the entire
area. If severe storms develop, damaging winds and large hail
would be the primary risks.

For Saturday there may be a risk of severe storms south of
Interstate 80. Beyond Saturday it is too early to determine any
severe risk.

Flooding will continue along area rivers. Please see the latest
Flood Statements and Flood Warnings for details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation and amateur radio activation will likely be
needed after 5 PM today.

In the hours before

Local storm report, May 22, 5:04 PM CDT, 2 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
504 PM CDT WED MAY 22 2019

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

1025 PM     NON-TSTM WND DMG 2 NNE CREDIT ISLAND     41.52N 90.60W
05/21/2019                   SCOTT              IA   BROADCAST MEDIA

            *** 1 INJ ***
            MEDIA REPORT OF A TREE DOWN ON A HOME. A
            WOMAN REPORTEDLY SUFFERED MINOR INJURIES.
            TIME ESTIMATED.

&&

RP KINNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:50 PM CDT	Flash Flood Warning	DVN	Lee	3 hr
May 22, 8:18 PM CDT	River Flood Warning	DVN	Clinton, Scott	18 days
May 22, 9:59 PM CDT	Severe Thunderstorm Warning	DVN	Lee	46 min
May 22, 7:54 PM CDT	Tornado Warning	DVN	Hancock	51 min
May 22, 8:02 PM CDT	River Flood Warning	DVN	Henry, Rock Island, Whiteside	22 days
May 22, 8:02 PM CDT	River Flood Warning	DVN	Henry, Rock Island	21 days
May 22, 8:31 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	44 min
May 22, 8:44 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	26 min
May 22, 8:56 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, McDonough	34 min
May 22, 9:16 PM CDT	Tornado Warning	DVN	McDonough	44 min
May 22, 10:58 PM CDT	Special Weather Statement	DVN	Henry, Mercer, Rock Island	32 min
May 22, 11:21 PM CDT	Special Weather Statement	DVN	Bureau, Henry	54 min
May 22, 11:34 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Henry	56 min
May 23, 12:43 AM CDT	Special Weather Statement	DVN	Warren	47 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2019 Severe Thunderstorm Warnings in Illinois, 2019 Severe Thunderstorm Warnings in Missouri, 2019 Every severe thunderstorm warning in 2019

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.