Alert archive / Iowa / Tornado Warnings in 2001

Tornado Warning 21, NWS Quad Cities, IA

May 10, 2001Muscatine County, Iowa

NWS Quad Cities, IA issued this tornado warning at May 10, 2001, 8:27 PM CDT for Muscatine County, Iowa. It was in force for 63 min. No storm report in the archive falls 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.

The facts

Issued: May 10, 2001, 8:27 PM CDT (01:27 UTC)
Expired: May 10, 2001, 9:30 PM CDT
In force: 63 min
Issued by: NWS Quad Cities, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Muscatine County, IA

The radar

The Quad Cities radar (KDVN), 47 km from the middle of the area, began a volume at 01:27 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 10, 4:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.5 hours before the alert went out and 54 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: 794 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDVN 110128
TORMLI
IAC139-110230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
827 PM CDT THU MAY 10 2001

THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  MUSCATINE COUNTY IN EAST CENTRAL IOWA

* UNTIL 930 PM CDT

* AT 822 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
LINE OF SEVERE THUNDERSTORMS...WITH POSSIBLE TORNADOES...EXTENDING 
FROM 19 MILES WEST OF NICHOLS TO 12 MILES NORTH OF WILTON...OR ALONG 
A LINE EXTENDING FROM 2 MILES NORTHEAST OF KALONA TO 4 MILES EAST OF 
TIPTON...MOVING SOUTHEAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   WEST LIBERTY BY 835 PM CDT.
   ATALISSA BY 840 PM CDT.
   WILTON BY 845 PM CDT.
   CONESVILLE BY 850 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.

REPORT ANY SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4158 9135 4135 9137 4135 9110 4143 9107
          4147 9080 4159 9080

JAZ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:11 PM CDT	Tornado Warning	DVN	Jones	64 min
May 10, 7:15 PM CDT	Severe Thunderstorm Warning	DVN	Iowa	60 min
May 10, 7:28 PM CDT	Tornado Warning	DVN	Johnson, Linn	62 min
May 10, 7:48 PM CDT	Tornado Warning	DVN	Cedar	42 min
May 10, 8:02 PM CDT	Tornado Warning	DVN	Clinton, Jackson	58 min
May 10, 8:11 PM CDT	Tornado Warning	DVN	Jones	34 min
May 10, 8:28 PM CDT	Tornado Warning	DVN	Cedar	62 min
May 10, 8:33 PM CDT	Severe Thunderstorm Warning	DVN	Johnson	27 min
May 10, 8:39 PM CDT	Tornado Warning	DVN	Scott	66 min
May 10, 8:40 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk	50 min
May 10, 8:58 PM CDT	Tornado Warning	DVN	Clinton	47 min

Nearby

Tornado Warnings in Iowa, 2001 Every tornado warning in 2001 Tornadoes in 2001

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.