Alert archive / Iowa / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 160, NWS Quad Cities, IA

June 24, 2006Johnson County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 24, 2006, 5:59 PM CDT for Johnson County, Iowa. It was in force for 61 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
Jun 24, 2006, 5:59 PM CDT (22:59 UTC)
Expired
Jun 24, 2006, 7:00 PM CDT
In force
61 min
Issued by
NWS Quad Cities, IA
Area
Counties, with a storm outline in the text

County Johnson County, IA

The radar

The Quad Cities radar (KDVN), 84 km from the middle of the area, began a volume at 23:00 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, 11.0 hours before the alert went out and 91 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 12:00Z on 2006-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2006-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1565 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
6 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 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 Jun 24, 2:55 PM CDT, 3 hours 4 minutes earlier.

Area forecast discussion, Jun 24, 2:55 PM CDT, 3 hours 4 minutes before
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Hazardous weather outlook, Jun 24, 5:35 AM CDT, 12 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
535 AM CDT SAT JUN 24 2006

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-251000-
BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO-CLINTON
IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL-HENDERSON IL-HENRY
IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA-JO DAVIESS IL-JOHNSON IA-
JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA-MCDONOUGH IL-MERCER IL-
MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL-SCOTLAND MO-SCOTT IA-
STEPHENSON IL-VAN BUREN IA-WARREN IL-WASHINGTON IA-WHITESIDE IL-
535 AM CDT SAT JUN 24 2006

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

A SEASONABLY STRONG UPPER LEVEL DISTURBANCE WILL PRODUCE THUNDERSTORMS
BY MID AFTERNOON LASTING INTO THIS EVENING. DESPITE MARGINAL
INSTABILITY...THE RELATIVELY LOW FREEZING LEVELS AND ENOUGH DRY AIR
ALOFT SHOULD ALLOW SOME OF THE STORMS TO BECOME STRONG TO SEVERE BY LATE
AFTERNOON INTO THE MID EVENING HOURS. THE PRIMARY THREAT WILL BE LARGE
HAIL UP TO THE SIZE OF NICKELS. ISOLATED DAMAGING STRAIGHT LINE WINDS OF
50 TO 60 MPH ARE A SECONDARY THREAT LATE THIS AFTERNOON UNTIL SUNSET.

THE AREAS MOST AT RISK OF ANY SEVERE STORMS WILL BE NORTHWEST OF A
STERLING TO GENESEO ILLINOIS TO OTTUMWA IOWA LINE.

THE STORM PREDICTION CENTER HAS A SLIGHT RISK OF SEVERE WEATHER FOR
LOCATIONS NORTHWEST OF A DUBUQUE IOWA TO WILLIAMSBURG IOWA AXIS.

INTERESTED INDIVIDUALS SHOULD MONITOR THEIR FAVORITE MEDIA OUTLET FOR
FURTHER UPDATES.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY

TUESDAY THROUGH FRIDAY...A SERIES OF DISTURBANCES WILL CAUSE EPISODES
OF THUNDERSTORMS ACROSS THE MIDWEST.  ATMOSPHERIC CONDITIONS REMAIN
TOO UNCLEAR TO ASSESS ANY SEVERE THREAT AND POSSIBLE LOCATIONS AT
THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE BY MID AFTERNOON AND INTO THIS EVENING
NORTHWEST OF A STERLING TO GENESEO ILLINOIS TO OTTUMWA IOWA LINE.

NICHOLS

In the hours before

Local storm report, Jun 24, 3:43 PM CDT, 2 hours 16 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 3:06 PM CDTSevere Thunderstorm WarningDVNJones54 min
Jun 24, 5:46 PM CDTSevere Thunderstorm WarningDVNBenton59 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2006Every severe thunderstorm warning in 2006

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.