Alert archive / Iowa / Tornado Warnings in 2004

Tornado Warning 19, NWS Quad Cities, IA

May 30, 2004Benton County, Buchanan County, Linn County, Iowa

NWS Quad Cities, IA issued this tornado warning at May 30, 2004, 3:26 PM CDT for Benton County, Buchanan County, Linn County, Iowa. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 30, 2004, 3:26 PM CDT (20:26 UTC)
Expired: May 30, 2004, 4:30 PM CDT
In force: 64 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

Counties Benton County, IA, Buchanan County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 128 km from the middle of the area, began a volume at 20:27 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
May 30, 12:25 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.4 hours before the alert went out and 323 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 482 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 370 m²/s²
0-3 km storm-relative helicity: 382 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.

816 
WFUS53 KDVN 302026
TORDVN
IAC011-019-113-302130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
325 PM CDT SUN MAY 30 2004

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN BENTON COUNTY IN EAST CENTRAL IOWA
  NORTHWESTERN LINN COUNTY IN EAST CENTRAL IOWA
  SOUTHEASTERN BUCHANAN COUNTY IN NORTHEAST IOWA

* UNTIL 430 PM CDT

* AT 322 PM CDT...TRAINED SPOTTERS REPORTED A TORNADO NEAR WALKER...
  OR ABOUT 12 MILES NORTHEAST OF VINTON...MOVING NORTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  URBANA...TROY MILLS...TODDVILLE...SHELLSBURG...ROWLEY...ROBINS...
  QUASQUETON...PALO...NEWHALL...CENTER POINT...BRANDON...BLAIRSTOWN
  AND ATKINS.

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

THIS STORM IS ALSO CAPABLE OF PRODUCING LARGE HAIL THE SIZE OF
NICKELS.

THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM
FLOODING.

LAT...LON 4232 9203 4188 9209 4207 9164 4251 9165

$$

ERVIN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 5:22 AM CDT	Flash Flood Warning	DVN	Jefferson	6 hr
May 30, 7:53 AM CDT	Flash Flood Warning	DVN	Scott	6 hr
May 30, 2:18 PM CDT	Severe Thunderstorm Warning	DVN	Lee	42 min
May 30, 2:29 PM CDT	Tornado Warning	DVN	Lee	46 min
May 30, 2:45 PM CDT	Tornado Warning	DVN	Des Moines	45 min
May 30, 2:47 PM CDT	Flash Flood Warning	DVN	Lee	5 hr
May 30, 3:09 PM CDT	Flash Flood Warning	DVN	Jefferson, Keokuk, Washington	5 hr
May 30, 3:32 PM CDT	Severe Thunderstorm Warning	DVN	Johnson, Washington	58 min
May 30, 3:41 PM CDT	Tornado Warning	DVN	Dubuque, Jones	49 min
May 30, 3:52 PM CDT	Tornado Warning	DVN	Iowa, Johnson	53 min
May 30, 3:58 PM CDT	Tornado Warning	DVN	Delaware	62 min
May 30, 4:03 PM CDT	Tornado Warning	DVN	Cedar, Muscatine	42 min
May 30, 4:12 PM CDT	Flash Flood Warning	DVN	Buchanan, Delaware, Dubuque, Jones, Linn	63 min
May 30, 4:18 PM CDT	Tornado Warning	DVN	Dubuque	57 min
May 30, 4:25 PM CDT	Flash Flood Warning	DVN	Buchanan, Delaware, Dubuque, Jones, Linn	4 hr
May 30, 4:44 PM CDT	Tornado Warning	DVN	Cedar, Scott	46 min
May 30, 5:22 PM CDT	Severe Thunderstorm Warning	DVN	Delaware	28 min

Nearby

Tornado Warnings in Iowa, 2004 Every tornado warning in 2004 Tornadoes in 2004

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.