Alert archive / Iowa / Tornado Warnings in 1990

Tornado Warning 9, NWS Quad Cities, IA

March 13, 1990Delaware County, Iowa

NWS Quad Cities, IA issued this tornado warning at Mar 13, 1990, 5:37 PM CST for Delaware County, Iowa. It was in force for 38 min.

The area

The counties it named.

The facts

Issued
Mar 13, 1990, 5:37 PM CST (23:37 UTC)
Expired
Mar 13, 1990, 6:15 PM CST
In force
38 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Delaware County, IA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 11.6 hours before the alert went out and 320 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 1990-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 1990-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1580 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
343 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 13, 12:39 AM CSTSevere Thunderstorm WarningDVNCedar31 min
Mar 13, 1:40 PM CSTSevere Thunderstorm WarningDVNClinton20 min
Mar 13, 1:58 PM CSTSevere Thunderstorm WarningDVNClinton32 min
Mar 13, 2:10 PM CSTSevere Thunderstorm WarningDVNJones50 min
Mar 13, 3:45 PM CSTSevere Thunderstorm WarningDVNScott45 min
Mar 13, 4:26 PM CSTTornado WarningDVNScott34 min
Mar 13, 4:59 PM CSTTornado WarningDVNClinton, Scott31 min
Mar 13, 5:01 PM CSTTornado WarningDVNDelaware29 min
Mar 13, 5:09 PM CSTTornado WarningDVNDubuque, Jones36 min
Mar 13, 5:25 PM CSTTornado WarningDVNDubuque35 min
Mar 13, 5:31 PM CSTTornado WarningDVNClinton29 min
Mar 13, 5:39 PM CSTTornado WarningDVNCedar, Muscatine36 min

Nearby

Tornado Warnings in Iowa, 1990Every tornado warning in 1990Tornadoes in 1990

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.