Alert archive / Iowa / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 166, NWS Quad Cities, IA

September 11, 2000Cedar County, Clinton County, Scott County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Sep 11, 2000, 8:02 PM CDT for Cedar County, Clinton County, Scott County, Iowa. It was in force for 43 min. 7 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Sep 11, 2000, 8:02 PM CDT (01:02 UTC)
Expired: Sep 11, 2000, 8:45 PM CDT
In force: 43 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

Counties Cedar County, IA, Clinton County, IA, Scott County, IA

The radar

The Quad Cities radar (KDVN), 23 km from the middle of the area, began a volume at 01:03 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, 8:28 PM CDT	Thunderstorm Wind 53 M	Davenport Arpt, IA
Sep 11, 8:30 PM CDT	Thunderstorm Wind 63 M	Davenport, IA
Sep 11, 8:30 PM CDT	Thunderstorm Wind 52 E	Davenport, IA	Trees and power lines down at 13th Street and Brown Street.
Sep 11, 8:30 PM CDT	Thunderstorm Wind	Bettendorf, IA	Large tree fell on a home and vehicle parked in the driveway on Sunset Circle.
Sep 11, 8:30 PM CDT	Thunderstorm Wind 61 E	Davenport, IA	Winds estimated at near 70 mph knocked over a 2000 pound statue of a bull at the Mississippi Valley Fairgrounds. The bull serves as the mascot for the fair.
Sep 11, 8:35 PM CDT	Thunderstorm Wind 69 E	Bettendorf, IA	Winds were sustained at 60 mph for a period of 5 minutes, with gusts estimated at near 80 mph.
Sep 11, 8:50 PM CDT	Thunderstorm Wind	Bettendorf, 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, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.0 hours before the alert went out and 27 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: 1371 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 2176 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDVN 120103
SVRMLI
IAC031-045-163-120145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
802 PM CDT MON SEP 11 2000

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CEDAR COUNTY IN EAST CENTRAL IOWA
  CLINTON COUNTY IN EAST CENTRAL IOWA
  SCOTT COUNTY IN EAST CENTRAL IOWA

* UNTIL 845 PM CDT

* AT 757 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS
  ALONG A LINE EXTENDING FROM 3 MILES NORTHEAST OF CLARENCE TO 2
  MILES SOUTHWEST OF SPRINGDALE...MOVING EAST AT 35 MPH.

* THE LINE OF SEVERE THUNDERSTORMS WILL BE NEAR...
   LOWDEN...ROCHESTER...TORONTO BY 805 PM CDT.
   BENNETT...LIME CITY...LOST NATION BY 810 PM CDT.
   CALAMUS...NEW LIBERTY...SUNBURY BY 815 PM CDT.
   

THESE SEVERE THUNDERSTORMS ARE CAPABLE OF PRODUCING HAIL UP TO 1 INCH
IN DIAMETER AND WINDS IN EXCESS OF 55 MPH. TAKE COVER IN A STURDY
STRUCTURE UNTIL THESE STORMS PASS.

DLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 7:21 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	69 min
Sep 11, 7:28 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson	47 min
Sep 11, 7:35 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk, Washington	40 min
Sep 11, 8:15 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine	30 min
Sep 11, 8:39 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	51 min
Sep 11, 9:18 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines	27 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2000 Every severe thunderstorm warning 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.