Alert archive / Iowa / Tornado Warnings in 1998

Tornado Warning 2, NWS Quad Cities, IA

March 30, 1998Jackson County, Iowa

NWS Quad Cities, IA issued this tornado warning at Mar 30, 1998, 8:33 PM CST for Jackson County, Iowa. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 30, 1998, 8:33 PM CST (02:33 UTC)
Expired: Mar 30, 1998, 9:20 PM CST
In force: 47 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Jackson County, IA

The radar

The Quad Cities radar (KDVN), 62 km from the middle of the area, began a volume at 02:36 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
Mar 30, 2:45 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.6 hours before the alert went out and 62 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: 226 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1587 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

027 
WFUS1 KMLI 310235 RRA
TORMLI
IAC097-310320-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
833 PM CST MON MAR 30 1998

* TORNADO WARNING FOR
  JACKSON COUNTY - EAST CENTRAL IOWA

* UNTIL 920 PM CST
 
* SOME LOCATIONS AFFECTED BY THIS TORNADO
  ANDREW                                     AROUND 840 PM CST
  SPRAGUEVILLE                               AROUND 840 PM CST
  PRESTON                                    AROUND 840 PM CST
  MILES                                      AROUND 845 PM CST
  SPRINGBROOK                                AROUND 845 PM CST

* AT 832 PM CST...DOPPLER RADAR AND SPOTTER REPORTS INDICATED A
  TORNADO 25 MILES NORTHWEST OF CLINTON OR 8 MILES SOUTH OF ANDREW
  MOVING NORTHEAST AT 40 MPH.

GO TO THE BASEMENT AND GET UNDER A WORKBENCH OR STURDY PIECE OF
FURNITURE. IF NO BASEMENT IS AVAILABLE...GO TO A SMALL INTERIOR
ROOM ON THE LOWEST FLOOR

ARKELL
 

&

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 6:18 PM CST	Severe Thunderstorm Warning	DVN	Jefferson	32 min
Mar 30, 6:56 PM CST	Severe Thunderstorm Warning	DVN	Lee, Van Buren	44 min
Mar 30, 7:34 PM CST	Severe Thunderstorm Warning	DVN	Des Moines, Henry	46 min
Mar 30, 7:48 PM CST	Severe Thunderstorm Warning	DVN	Cedar	47 min
Mar 30, 8:18 PM CST	Tornado Warning	DVN	Clinton	47 min
Mar 30, 8:36 PM CST	Severe Thunderstorm Warning	DVN	Lee	49 min
Mar 31, 3:50 PM CST	Severe Thunderstorm Warning	DVN	Scott	35 min

Nearby

Tornado Warnings in Iowa, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.