Alert archive / Iowa / Tornado Warnings in 2006

Tornado Warning 31, NWS Quad Cities, IA

June 6, 2006Cedar County, Johnson County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jun 6, 2006, 2:57 PM CDT for Cedar County, Johnson County, Iowa. It was in force for 63 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 6, 2006, 2:57 PM CDT (19:57 UTC)
Expired: Jun 6, 2006, 4:00 PM CDT
In force: 63 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

Counties Cedar County, IA, Johnson County, IA

The radar

The Quad Cities radar (KDVN), 61 km from the middle of the area, began a volume at 19:57 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.

What was reported inside it

Time	Report	Where	Remark
Jun 6, 3:31 PM CDT	HAIL 1.75	1 S Solon, IA
Jun 6, 3:32 PM CDT	HAIL 1.75	Morse, IA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.0 hours before the alert went out and 67 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

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS53 KDVN 061959
TORDVN
IAC031-103-062100-
/O.NEW.KDVN.TO.W.0031.060606T1957Z-060606T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
257 PM CDT TUE JUN 6 2006

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  CEDAR COUNTY IN EAST CENTRAL IOWA...
  NORTHEAST JOHNSON COUNTY IN EAST CENTRAL IOWA...

* UNTIL 400 PM CDT.

* AT 253 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  POSSIBLE TORNADO NEAR SHUEYVILLE...OR ABOUT 7 MILES SOUTHEAST OF   
  CEDAR RAPIDS...MOVING SOUTHEAST AT 25 MPH.

* THE TORNADO WILL BE NEAR...
  SOLON BY 310 PM CDT...
  8 MILES SOUTH OF MECHANICSVILLE BY 330 PM CDT...
  TIPTON BY 350 PM CDT...

THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 265 AND 269.

THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.

LAT...LON 4163 9107 4163 9110 4181 9168 4185 9172
      4185 9138 4186 9137 4193 9137 4193 9133
      4185 9096 4183 9093

$$

12/BARDOU

4 follow-up statements

000 
WWUS53 KDVN 062014
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
310 PM CDT TUE JUN 6 2006

IAC031-103-062100-
/O.CON.KDVN.TO.W.0031.000000T0000Z-060606T2100Z/
CEDAR IA-JOHNSON IA-
310 PM CDT TUE JUN 6 2006

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR JOHNSON
AND CEDAR COUNTIES...

AT 306 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR TWIN VIEW
HEIGHTS...OR ABOUT 9 MILES SOUTHEAST OF CEDAR RAPIDS...MOVING
SOUTHEAST AT 20 MPH.

THE TORNADO WILL BE NEAR...
  TWIN VIEW HEIGHTS AND LAKE MACBRIDE STATE PARK BY 315 PM CDT...
  SOLON BY 320 PM CDT...
  MORSE AND NEWPORT BY 335 PM CDT...
  ELMIRA BY 340 PM CDT...
  OASIS BY 345 PM CDT...
  CEDAR BLUFF BY 350 PM CDT...

ADDITIONAL SEVERE THUNDERSTORMS WITH ROTATION AND LARGE HAIL UP TO 
GOLF BALL SIZE WERE NEAR NORTH LIBERTY AND JUST WEST OF 
COSGROVE...MOVING EAST AT 25 MPH.  

THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.

LAT...LON 4163 9107 4163 9110 4156 9181 4185 9172
      4185 9138 4186 9137 4193 9137 4193 9133
      4185 9096 4183 9093

$$

12/BARDOU

000 
WWUS53 KDVN 062029
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
326 PM CDT TUE JUN 6 2006

IAC031-103-062100-
/O.CON.KDVN.TO.W.0031.000000T0000Z-060606T2100Z/
CEDAR IA-JOHNSON IA-
326 PM CDT TUE JUN 6 2006

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR JOHNSON
AND CEDAR COUNTIES...

AT 322 PM CDT...DOPPLER RADAR INDICATED A TORNADO NEAR NORTH 
LIBERTY...OR ABOUT 7 MILES NORTHWEST OF IOWA CITY...MOVING EAST AT 
20 MPH. TRAINED SPOTTERS REPORTED A FUNNEL CLOUD JUST NORTHEAST OF 
TIFFIN AT 322 PM. A BRIEF TOUCHDOWN WAS REPORTED EARLIER JUST SOUTH 
OF OXFORD. SEEK SHELTER IF YOU ARE IN THE PATH OF THIS STORM.

THE TORNADO WILL BE NEAR...
  SOLON BY 335 PM CDT...
  NEWPORT BY 340 PM CDT...
  MORSE BY 345 PM CDT...
  ELMIRA BY 350 PM CDT...
  OASIS...CEDAR BLUFF AND WEST BRANCH BY 355 PM CDT...

THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.

LAT...LON 4163 9107 4163 9110 4156 9181 4185 9172
      4185 9138 4186 9137 4193 9137 4193 9133
      4185 9096 4183 9093

$$

12/BARDOU

000 
WWUS53 KDVN 062048
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
344 PM CDT TUE JUN 6 2006

IAC031-103-062100-
/O.CON.KDVN.TO.W.0031.000000T0000Z-060606T2100Z/
CEDAR IA-JOHNSON IA-
344 PM CDT TUE JUN 6 2006

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR JOHNSON
AND CEDAR COUNTIES...

AT 344 PM CDT...DOPPLER RADAR INDICATED A TORNADO LOCATED OVER IOWA 
CITY...MOVING SOUTHEAST AT 20 MPH. AN ADDITIONAL STORM WITH STRONG 
ROTATION WAS LOCATED JUST EAST OF ANISH MOVING EAST AT 20 MPH. SEEK 
SHELTER IMMEDIATELY.

A ROTATING WALL CLOUD WAS SPOTTED NEAR CARVER HAWKEYE ARENA AT 339 
PM.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MORSE...ELMIRA...MECHANICSVILLE...OASIS...CEDAR BLUFF...WEST
BRANCH...WALD...TIPTON MATTHEWS AIRPORT...TIPTON...STANWOOD...
SPRINGDALE...ROCHESTER...LIME CITY...DOWNEY...CENTERDALE...CEDAR
VALLEY AND BUCHANAN

THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.

LARGE HAIL TO THE SIZE OF GOLF BALLS IS POSSIBLE WITH THESE STORMS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
TUESDAY EVENING FOR SOUTHEASTERN IOWA AND NORTHWESTERN ILLINOIS AND
NORTHEAST MISSOURI.

LAT...LON 4163 9107 4163 9110 4156 9181 4185 9172
      4185 9138 4186 9137 4193 9137 4193 9133
      4185 9096 4183 9093

$$

12/BARDOU

000 
WWUS53 KDVN 062106
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
403 PM CDT TUE JUN 6 2006

IAC031-103-062113-
/O.EXP.KDVN.TO.W.0031.000000T0000Z-060606T2100Z/
CEDAR IA-JOHNSON IA-
403 PM CDT TUE JUN 6 2006

...THE TORNADO WARNING FOR JOHNSON AND CEDAR COUNTIES EXPIRED AT 400
PM CDT...

ALTHOUGH SEVERE THUNDERSTORMS WERE STILL OCCURRING ACROSS SOUTHERN 
JOHNSON COUNTY...THE THREAT OF TORNADOES HAS DIMINISHED FOR NOW.  
THEREFORE...THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
TUESDAY EVENING FOR SOUTHEASTERN IOWA AND NORTHWESTERN ILLINOIS AND
NORTHEAST MISSOURI.

LAT...LON 4163 9107 4163 9110 4156 9181 4185 9172
      4185 9138 4186 9137 4193 9137 4193 9133
      4185 9096 4183 9093

$$

12

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jun 6, 1:52 PM CDT, 1 hour 5 minutes earlier.

Area forecast discussion, Jun 6, 1:52 PM CDT, 1 hour 5 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, 9 hours 56 minutes 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, 2:28 PM CDT, 29 minutes before

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

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

0207 PM     HAIL             TODDVILLE               42.10N 91.72W
06/06/2006  E0.75 INCH       LINN               IA   TRAINED SPOTTER

0210 PM     HAIL             ALEXIS                  41.06N 90.57W
06/06/2006  E0.25 INCH       WARREN             IL   LAW ENFORCEMENT

0215 PM     HAIL             4 E HIAWATHA            42.05N 91.61W
06/06/2006  E0.88 INCH       LINN               IA   TRAINED SPOTTER

&&

15

Local storm report, Jun 6, 2:41 PM CDT, 16 minutes before

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

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

0230 PM     HAIL             1 NW CEDAR RAPIDS       41.98N 91.68W
06/06/2006  M1.00 INCH       LINN               IA   TRAINED SPOTTER

            5 MINUTE DURATION

0233 PM     HAIL             5 NNE CEDAR RAPIDS      42.04N 91.63W
06/06/2006  E0.75 INCH       LINN               IA   TRAINED SPOTTER

&&

15

Local storm report, Jun 6, 2:44 PM CDT, 13 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, 7 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

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, 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, 4:02 PM CDT	Severe Thunderstorm Warning	DVN	Johnson	43 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

Nearby

Tornado Warnings in Iowa, 2006 Every tornado warning in 2006 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.