Alert archive / Iowa / Tornado Warnings in 2005

Tornado Warning 7, NWS Quad Cities, IA

June 8, 2005Henry County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jun 8, 2005, 12:05 PM CDT for Henry County, Iowa. It was in force for 40 min. 1 report 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 8, 2005, 12:05 PM CDT (17:05 UTC)
Expired: Jun 8, 2005, 12:45 PM CDT
In force: 40 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Henry County, IA

The radar

The Quad Cities radar (KDVN), 101 km from the middle of the area, began a volume at 17:05 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.

What was reported inside it

Time	Report	Where	Remark
Jun 8, 12:15 PM CDT	TSTM WND DMG	Swedesburg, IA	SPORADIC WIND DAMAGE ACROSS NORTHERN HALF OF COUNTY INCLUDING POWER POLES AND TREES DOWNED. TOWNS IMPACTED INCLUDE WINFIELD...MOUNT UNION...NEW LONDON...MOUNT PLEASANT...AND SWEDESBURG. WIND SPEEDS ESTIMATED AT 60 TO 70 MPH.

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

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 8, 9:55 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 8, 12:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 5.1 hours before the alert went out and 107 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: 546 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 1084 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 61 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 081706
TORDVN
IAC087-081745-
/O.NEW.KDVN.TO.W.0007.050608T1705Z-050608T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1205 PM CDT WED JUN 8 2005

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN HENRY COUNTY IN SOUTHEAST IOWA

* UNTIL 1245 PM CDT

* AT 1201 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 4 MILES SOUTH OF WAYLAND...OR ABOUT 11 MILES NORTHWEST OF
  MOUNT PLEASANT...MOVING NORTHEAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  WAYLAND BY 1210 PM CDT
  OLDS BY 1225 PM CDT
  WINFIELD BY 1240 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 4115 9169 4098 9170 4103 9140 4115 9139

$$

HLADIK

1 follow-up statement

000 
WWUS53 KDVN 081720
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1219 PM CDT WED JUN 8 2005

IAC087-081745-
/O.CON.KDVN.TO.W.0007.000000T0000Z-050608T1745Z/
HENRY IA-
1219 PM CDT WED JUN 8 2005

...A TORNADO WARNING CONTINUES UNTIL 1245 PM CDT FOR NORTHERN HENRY
COUNTY...

AT 1214 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO.  STRONG STORM ROTATION WAS INDICATED BY NATIONAL 
WEATHER SERVICE DOPPLER RADAR LOCATED NEAR SWEDESBURG...OR ABOUT 9 
MILES NORTH OF MOUNT PLEASANT...MOVING EAST AT 25 MPH.

THE TORNADO WILL BE NEAR...
  SWEDESBURG AND OLDS NOW
  WINFIELD BY 1230 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 4115 9169 4098 9170 4103 9140 4115 9139

$$

12

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 11:07 AM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	70 min
Jun 8, 11:49 AM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Washington	77 min
Jun 8, 12:30 PM CDT	Tornado Warning	DVN	Des Moines, Louisa	71 min

Nearby

Tornado Warnings in Iowa, 2005 Every tornado warning in 2005 Tornadoes in 2005

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.