Alert archive / Iowa / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 2, NWS Quad Cities, IA

March 9, 2002Benton County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 9, 2002, 1:06 AM CST for Benton County, Iowa. It was in force for 39 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 9, 2002, 1:06 AM CST (07:06 UTC)
Expired: Mar 9, 2002, 1:45 AM CST
In force: 39 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Benton County, IA

The radar

The Quad Cities radar (KDVN), 134 km from the middle of the area, began a volume at 07:07 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 nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 7.1 hours before the alert went out and 139 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: 184 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1023 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDVN 090706
SVRMLI
IAC011-090745-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
105 AM CST SAT MAR 9 2002

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BENTON COUNTY IN EAST CENTRAL IOWA

* UNTIL 145 AM CST

* AT 105 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH DAMAGING WINDS 6 MILES WEST OF BELLE
  PLAINE...OR 10 MILES NORTH OF BROOKLYN...MOVING NORTHEAST AT 50
  MPH.

* THE SEVERE THUNDERSTORM IS EXPECTED TO BE NEAR...
   BELLE PLAINE BY 110 AM CST.
   KEYSTONE BY 115 AM CST.
   VAN HORNE BY 120 AM CST.
   NEWHALL BY 130 AM CST
   VINTON BY 130 AM CST.

THIS SEVERE THUNDERSTORM IS CAPABLE OF WINDS IN EXCESS OF 55 MPH AND
PEA SIZED HAIL. TAKE COVER IN A STURDY STRUCTURE UNTIL THE STORM
PASSES.


$$

REA

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 9, 12:37 AM CST	Severe Thunderstorm Warning	DVN	Iowa, Jefferson, Keokuk, Van Buren	68 min
Mar 9, 1:20 AM CST	Severe Thunderstorm Warning	DVN	Henry, Johnson, Lee, Washington	70 min
Mar 9, 1:43 AM CST	Severe Thunderstorm Warning	DVN	Buchanan, Linn	62 min
Mar 9, 2:35 AM CST	Severe Thunderstorm Warning	DVN	Des Moines	40 min
Mar 9, 2:50 AM CST	Severe Thunderstorm Warning	DVN	Scott	40 min
Mar 9, 3:05 AM CST	Severe Thunderstorm Warning	DVN	Clinton	40 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2002 Every severe thunderstorm warning in 2002

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.