Alert archive / Minnesota / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 122

April 28, 200411 counties in Minnesota

The Storm Prediction Center issued this severe thunderstorm watch at Apr 28, 2004, 3:25 PM CDT for 11 counties in Minnesota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 28, 2004, 3:25 PM CDT (20:25 UTC)
Expired
Apr 28, 2004, 9:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Crow Wing County, MN, Hubbard County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Otter Tail County, MN, Saint Louis County, MN, Wadena County, MN

The radar

The Duluth radar (KDLH), 127 km from the middle of the area, began a volume at 20:27 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.

Warnings issued inside it

15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 28, 4:51 PM CDTSevere Thunderstorm WarningDLHItasca24 min
Apr 28, 4:59 PM CDTTornado WarningDLHSaint Louis46 min
Apr 28, 5:08 PM CDTSevere Thunderstorm WarningDLHCrow Wing52 min
Apr 28, 5:12 PM CDTSevere Thunderstorm WarningDLHItasca, Saint Louis63 min
Apr 28, 5:26 PM CDTSevere Thunderstorm WarningDLHCass34 min
Apr 28, 5:42 PM CDTTornado WarningDLHSaint Louis33 min
Apr 28, 5:43 PM CDTSevere Thunderstorm WarningDLHAitkin, Itasca62 min
Apr 28, 5:57 PM CDTSevere Thunderstorm WarningDLHCass63 min
Apr 28, 6:11 PM CDTTornado WarningDLHSaint Louis64 min
Apr 28, 6:27 PM CDTTornado WarningDLHLake63 min
Apr 28, 6:32 PM CDTSevere Thunderstorm WarningDLHSaint Louis58 min
Apr 28, 6:58 PM CDTSevere Thunderstorm WarningDLHCarlton62 min
Apr 28, 7:26 PM CDTSevere Thunderstorm WarningDLHSaint Louis64 min
Apr 28, 7:28 PM CDTTornado WarningDLHCook, Lake62 min
Apr 28, 7:55 PM CDTSevere Thunderstorm WarningDLHLake65 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 8.4 hours before the alert went out and 177 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, International Fa, MN at 12:00Z on 2004-04-28Temperature 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, International Fa, MN at 12:00Z on 2004-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 square meters per square second.19395878Sfc1 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
1339 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
356 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 28, 2:35 PM CDTMesoscale DiscussionSPCAitkin, Benton, Carlton, Cass, Crow Wing, Douglas and 13 more85 min
Apr 28, 6:01 PM CDTMesoscale DiscussionSPCAitkin, Benton, Carlton, Crow Wing, Kanabec, Lake and 5 more89 min

Nearby

Severe Thunderstorm Watches in Minnesota, 2004Every severe thunderstorm watch in 2004

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.