Alert archive / Iowa / Tornado Warnings in 2000

Tornado Warning 17, NWS Quad Cities, IA

September 11, 2000Dubuque County, Iowa

NWS Quad Cities, IA issued this tornado warning at Sep 11, 2000, 5:05 PM CDT for Dubuque County, Iowa. It was in force for 25 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Sep 11, 2000, 5:05 PM CDT (22:05 UTC)
Expired: Sep 11, 2000, 5:30 PM CDT
In force: 25 min
Issued by: NWS Quad Cities, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Dubuque County, IA

The radar

The Quad Cities radar (KDVN), 111 km from the middle of the area, began a volume at 22:06 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
Sep 11, 5:30 PM CDT	Hail 0.75	Sherrill, IA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 11, 1:15 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.1 hours before the alert went out and 111 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: 1636 J/kg
Mixed-layer CIN: -239 J/kg
Mixed-layer LCL: 1387 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 99 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 112206
TORMLI

IAC061-112230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
505 PM CDT MON SEP 11 2000

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN DUBUQUE COUNTY IN NORTHEAST IOWA

* UNTIL 530 PM CDT

* AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH A DEVELOPING TORNADO OVER DURANGO...OR 6
  MILES NORTHWEST OF DUBUQUE...MOVING EAST AT 15 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   ROSE BY 510 PM CDT.
   EDMORE BY 515 PM CDT.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. SEEK
SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR
ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND
ALWAYS STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT MONDAY EVENING FOR
NORTH CENTRAL ILLINOIS. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL
700 PM CDT MONDAY EVENING FOR EASTERN IOWA AND NORTHWEST ILLINOIS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTHEAST IOWA AND NORTHEAST MISSOURI. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM CDT MONDAY
EVENING FOR SOUTHEAST IOWA AND NORTHEAST MISSOURI. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 700 PM CDT MONDAY
EVENING FOR NORTH CENTRAL ILLINOIS.

LAT...LON 4265 9088 4248 9083 4251 9043 4273 9049

DLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 9:15 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Jackson	30 min
Sep 11, 1:26 PM CDT	Severe Thunderstorm Warning	DVN	Clinton	49 min
Sep 11, 4:43 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	32 min
Sep 11, 5:14 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Johnson, Linn	46 min
Sep 11, 5:19 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	41 min
Sep 11, 5:41 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk	49 min
Sep 11, 5:53 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jones	67 min
Sep 11, 5:54 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Johnson, Linn	66 min
Sep 11, 6:22 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk, Washington	68 min
Sep 11, 6:45 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	45 min
Sep 11, 6:57 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Scott	48 min

Nearby

Tornado Warnings in Iowa, 2000 Every tornado warning in 2000 Tornadoes in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.