Alert archive / Iowa / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 115, NWS Quad Cities, IA

August 2, 2022Cedar County, Johnson County, Muscatine County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 2, 2022, 5:11 AM CDT for Cedar County, Johnson County, Muscatine County, Iowa. It was in force for 31 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
Aug 2, 2022, 5:11 AM CDT (10:11 UTC)
Expired
Aug 2, 2022, 5:42 AM CDT
In force
31 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Cedar County, IA, Johnson County, IA, Muscatine County, IA

The radar

The Quad Cities radar (KDVN), 58 km from the middle of the area, began a volume at 10:15 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 00:00Z, 10.2 hours before the alert went out and 65 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2022-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 472 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2022-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
472 J/kg
Mixed-layer CIN
-189 J/kg
Mixed-layer LCL
1345 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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 Aug 2, 2:46 AM CDT, 2 hours 25 minutes earlier.

Area forecast discussion, Aug 2, 2:46 AM CDT, 2 hours 25 minutes before
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Hazardous weather outlook, Aug 2, 3:51 AM CDT, 1 hour 20 minutes before
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
351 AM CDT Tue Aug 2 2022

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-030900-
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-
351 AM CDT Tue Aug 2 2022

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

Temperatures and humidity on the rise will lead to heat indices
between 100 to 105 today. Thus, a Heat Advisory has been issued
from 1 PM to 8 PM today.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Threat for thunderstorms on Wednesday, where some may be strong to
severe in the afternoon. If the showers and storms don't
materialize, we will see temperatures in the 90s again, with high
humidity. Thus, heat headlines will be possible for heat index
values near or over 100.

Next chance for possible heat headlines will be over the weekend,
with temperatures over 90 and increasing humidity once again.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

Gibbs/Gunkel

In the hours before

Special weather statement, Aug 2, 4:23 AM CDT, 48 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
423 AM CDT Tue Aug 2 2022

IAZ051-052-063>065-021015-
Linn IA-Benton IA-Iowa IA-Cedar IA-Johnson IA-
423 AM CDT Tue Aug 2 2022

...Strong thunderstorms will impact portions of west central Cedar,
Johnson, southeastern Benton, southern Linn and east central Iowa
Counties through 515 AM CDT...

At 423 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Atkins to near Amana to near Williamsburg.
Movement was east at 35 mph.

HAZARD...Winds in excess of 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Cedar Rapids, Iowa City, West Branch, Coralville, North Liberty,
Mount Vernon, Lisbon, Fairfax, Solon, Tiffin, Ely, Walford,
University Heights, Swisher, Oxford, Hills, Shueyville, Bertram,
Oakdale and Lake Macbride State Park.

This includes the following highways...
 Interstate 80 in Iowa between mile markers 229 and 253.
 Interstate 380 between mile markers 1 and 20.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.

&&

LAT...LON 4201 9184 4192 9136 4164 9137 4159 9151
      4166 9184
TIME...MOT...LOC 0923Z 283DEG 32KT 4196 9183 4178 9183 4164 9199

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

Gibbs
Special weather statement, Aug 2, 5:01 AM CDT, 10 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
501 AM CDT Tue Aug 2 2022

IAZ052-053-064>068-078-ILZ015-021045-
Rock Island IL-Scott IA-Clinton IA-Linn IA-Muscatine IA-Cedar IA-
Louisa IA-Jones IA-Johnson IA-
501 AM CDT Tue Aug 2 2022

...Strong thunderstorms will impact portions of west central Rock
Island, north central Louisa, Cedar, northwestern Scott, southeastern
Johnson, southern Jones, Muscatine, southeastern Linn and
southwestern Clinton Counties through 545 AM CDT...

At 501 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Mechanicsville to near West Liberty to
Kalona. Movement was southeast at 45 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Iowa City, Muscatine, Tipton, West Branch, Durant, Mechanicsville,
Stanwood, West Liberty, Wilton, Walcott, Lone Tree, Fruitland,
Lowden, Wheatland, Hills, Bennett, Nichols, Atalissa, Rochester and
Fairport.

This includes Interstate 80 in Iowa between mile markers 248 and 284.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4187 9090 4180 9078 4159 9078 4145 9079
      4145 9085 4142 9093 4143 9097 4142 9103
      4141 9105 4135 9107 4133 9113 4142 9137
      4154 9157 4186 9137 4186 9138 4195 9136
      4195 9120
TIME...MOT...LOC 1001Z 294DEG 38KT 4188 9128 4161 9133 4150 9170

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Gibbs

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 2:44 AM CDTHeat AdvisoryDVNBenton, Cedar, Des Moines, Henry, Iowa, Jefferson and 9 more17 hr
Aug 2, 3:59 AM CDTSevere Thunderstorm WarningDVNBenton, Iowa31 min
Aug 2, 4:23 AM CDTSpecial Weather StatementDVNJohnson52 min
Aug 2, 5:01 AM CDTSpecial Weather StatementDVNCedar, Muscatine44 min
Aug 2, 5:36 AM CDTSpecial Weather StatementDVNScott39 min
Aug 2, 6:15 AM CDTSpecial Weather StatementDVNDes Moines, Louisa60 min
Aug 2, 6:38 AM CDTSevere Thunderstorm WarningDVNDes Moines23 min
Aug 2, 6:13 AM CDTSpecial Weather StatementDVNBureau, Henry62 min
Aug 2, 7:20 AM CDTSpecial Weather StatementDVNHenderson, McDonough, Warren55 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2022Every severe thunderstorm warning in 2022

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.