Alert archive / Iowa / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 142, NWS Quad Cities, IA

June 6, 2006Johnson County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 6, 2006, 4:02 PM CDT for Johnson County, Iowa. It was in force for 43 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 6, 2006, 4:02 PM CDT (21:02 UTC)
Expired: Jun 6, 2006, 4:45 PM CDT
In force: 43 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 21:05 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 6, 3:20 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.0 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-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: 1 J/kg
Mixed-layer CIN: -307 J/kg
Mixed-layer LCL: 1172 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 104 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 6, 1:52 PM CDT, 2 hours 10 minutes earlier.

Area forecast discussion, Jun 6, 1:52 PM CDT, 2 hours 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
150 PM CDT TUE JUNE 06 2006

.SYNOPSIS...
THE LOCAL AREA REMAINS IN THE MOIST WARM AIR AHEAD OF A COLD FRONT
TODAY...WHICH HAS BEEN MOISTENED FURTHER BY A DISSIPATING MCS
EARLIER THIS MORNING. ISOLATED STORMS CONTINUE TO FIRE ALONG THE
OUTFLOW OF THIS MCS AND OVER TOP OF THE COLD POOL IN EASTERN IOWA.
CONVECTION HAS INITIATED ALONG THE FRONT FROM NORTHEAST IOWA TO
SOUTH CENTRAL IOWA...AND THIS IS MOST LIKELY GOING TO BE THE MAIN
SHOW FOR THIS AFTERNOON AND TONIGHT.
&&

.SHORT TERM...TONIGHT THROUGH THURSDAY...
THE FRONT IS EXPECTED TO BE NEAR THE MISSISSIPPI RIVER BY 6 TO 7 PM
THIS EVENING...SO THOUGH WE EXPECT WIDESPREAD STORMS ALONG THE
FRONT...THE EVENT SHOULD BE OVER WITH WEST OF A LINE FROM DUBUQUE TO
FAIRFIELD BY THEN.  BEHIND THE FRONT...WE EXPECT PARTLY TO MOSTLY
CLEAR SKIES AND NORTHWEST WINDS.

WEDNESDAY THROUGH THURSDAY WILL SEE DRIER AIR IN PLACE...WITH UPPER
RIDGING TAKING PLACE.  BY THURSDAY NIGHT...WE SHOULD SEE THE FIRST
IN A LONG SERIES OF ENERGY OVER TOPPING THE WESTERN RIDGE.

.LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...
THE TREND DURING THIS ENTIRE PERIOD WILL BE WARM AND HUMID...WITH
PERIODIC THUNDERSTORM CLUSTERS LEADING TO THE POTENTIAL FOR HEAVY
RAINFALL AND SEVERE WEATHER. THE UPPER RIDGE IS EXPECTED TO SLOWLY
FLATTEN...AND GRADUALLY BE REPLACED BY A WEAK TROF.  THIS WILL KEEP
THE MIDWEST ZONAL...BUT WITH ENERGY IN THE UPPER LEVELS MOVING
ACROSS AN EAST TO WEST FRONT NEAR IOWA...STORMS MAY REGENERATE IN
CONSECUTIVE DAYS.  THE SEASONAL REGIME IS ONE KNOWN FOR SIGNIFICANT
RAINFALL AND SEVERE STORMS...HOWEVER THE DETAILS OF ANY INDIVIDUAL
EVENT ARE UNCLEAR. ..ERVIN..
&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...NONE.
IL...NONE.
MO...NONE.

&&

ERVIN

Hazardous weather outlook, Jun 6, 5:01 AM CDT, 11 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
501 AM CDT TUE JUN 6 2006

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-071015-
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-
501 AM CDT TUE JUN 6 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

SEVERAL CLUSTERS OF THUNDERSTORMS WILL AFFECT MUCH OF EASTERN IOWA
AND NORTHWEST ILLINOIS EARLY THIS MORNING. THUNDERSTORMS WILL BE
CONFINED MAINLY TO AREAS NORTH OF HIGHWAY 34. SOME STORMS MAY BE
CAPABLE OF PRODUCING SMALL HAIL AND HEAVY DOWNPOURS...ESPECIALLY
NORTH OF INTERSTATE 80 BEFORE SUNRISE WITH THE ACTIVITY EXPECTED
TO DISSIPATE BY 9 AM.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE ENTIRE
AREA THIS AFTERNOON. THUNDERSTORMS ARE EXPECTED TO DEVELOP BY MID
AFTERNOON OVER EASTERN IOWA...THEN EXPAND EAST AND SOUTH ACROSS
NORTHEAST MISSOURI AND NORTHWEST ILLINOIS INTO EARLY EVENING AS A
WEAK COLD FRONT PUSHES THROUGH. SOME STORMS MAY BECOME SEVERE...WITH
THE POTENTIAL TO PRODUCE DAMAGING STRAIGHT LINE WINDS OVER 60 MPH
AND HAIL UP TO THE SIZE OF QUARTERS. AN ISOLATED TORNADO IS
POSSIBLE... ESPECIALLY IF STORMS DEVELOP ALONG WEAK BOUNDARIES
THAT MAY LINGER FROM MORNING THUNDERSTORMS. THE POTENTIAL FOR
SEVERE WEATHER WILL END OVER THE AREA BY SUNSET.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THUNDERSTORMS ARE POSSIBLE EACH DAY FROM FRIDAY THROUGH MONDAY.
IT IS TOO EARLY TO DETERMINE THE POTENTIAL FOR SEVERE WEATHER.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

SHEETS

In the hours before

Local storm report, Jun 6, 2:44 PM CDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
244 PM CDT TUE JUN 06 2006

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

0235 PM     HAIL             4 E HIAWATHA            42.05N 91.61W
06/06/2006  E0.75 INCH       LINN               IA   TRAINED SPOTTER

            ESTIMATED 1/2 TO 1 INCH OF RAIN IN PAST 30 MINUTES.

&&

15

Local storm report, Jun 6, 2:50 PM CDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
250 PM CDT TUE JUN 06 2006

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

0230 PM     HAIL             MARION                  42.03N 91.59W
06/06/2006  E0.25 INCH       LINN               IA   TRAINED SPOTTER

0233 PM     HAIL             CEDAR RAPIDS            41.97N 91.67W
06/06/2006  E0.88 INCH       LINN               IA   TRAINED SPOTTER

0234 PM     HAIL             CEDAR RAPIDS            41.97N 91.67W
06/06/2006  E0.88 INCH       LINN               IA   TRAINED SPOTTER

            TWO MINUTE DURATION

0239 PM     HAIL             5 E CEDAR RAPIDS        41.97N 91.57W
06/06/2006  E0.88 INCH       LINN               IA   TRAINED SPOTTER

0243 PM     HAIL             5 E CEDAR RAPIDS        41.97N 91.57W
06/06/2006  E1.00 INCH       LINN               IA   TRAINED SPOTTER

&&

15

Local storm report, Jun 6, 3:04 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
304 PM CDT TUE JUN 06 2006

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

0259 PM     HAIL             8 ESE CEDAR RAPIDS      41.93N 91.53W
06/06/2006  E0.88 INCH       LINN               IA   EMERGENCY MNGR

            NEAR PALISADES KEPPLER STATE PARK

&&

15

Local storm report, Jun 6, 3:26 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
326 PM CDT TUE JUN 06 2006

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

0322 PM     FUNNEL CLOUD     4 NNE TIFFIN            41.76N 91.65W
06/06/2006                   JOHNSON            IA   TRAINED SPOTTER

&&

15

Local storm report, Jun 6, 3:35 PM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
335 PM CDT TUE JUN 06 2006

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

0320 PM     FUNNEL CLOUD     WILLIAMSBURG            41.67N 92.01W
06/06/2006                   IOWA               IA   PUBLIC

            MULTIPLE PUBLIC REPORTS OF FUNNELS ALONG INTERSTATE
            HIGHWAY

0331 PM     HAIL             1 S SOLON               41.79N 91.49W
06/06/2006  E1.75 INCH       JOHNSON            IA   LAW ENFORCEMENT

&&

15

Local storm report, Jun 6, 3:39 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
339 PM CDT TUE JUN 06 2006

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

0319 PM     FUNNEL CLOUD     7 W IOWA CITY           41.66N 91.67W
06/06/2006                   JOHNSON            IA   LAW ENFORCEMENT

            NUMEROUS PUBLIC REPORTS OF FUNNEL CLOUDS ALONG INTERSTATE
            80

0332 PM     HAIL             MORSE                   41.75N 91.43W
06/06/2006  E1.75 INCH       JOHNSON            IA   LAW ENFORCEMENT

&&

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 1:59 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Lee	25 min
Jun 6, 2:03 PM CDT	Severe Thunderstorm Warning	DVN	Linn	57 min
Jun 6, 2:46 PM CDT	Tornado Warning	DVN	Linn	44 min
Jun 6, 2:57 PM CDT	Tornado Warning	DVN	Cedar, Johnson	63 min
Jun 6, 3:50 PM CDT	Severe Thunderstorm Warning	DVN	Washington	59 min
Jun 6, 3:53 PM CDT	Tornado Warning	DVN	Keokuk, Washington	52 min
Jun 6, 4:24 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson	66 min
Jun 6, 4:24 PM CDT	Severe Thunderstorm Warning	DVN	Louisa	48 min
Jun 6, 5:32 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson	40 min
Jun 6, 5:20 PM CDT	Severe Thunderstorm Warning	DVN	Scotland	55 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2006 Every 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.