Alert archive / Minnesota / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 217, NWS Twin Cities, MN

August 2, 20046 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 2, 2004, 4:55 AM CDT for 6 counties in Minnesota. It was in force for 80 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 2, 2004, 4:55 AM CDT (09:55 UTC)
Expired: Aug 2, 2004, 6:15 AM CDT
In force: 80 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Benton County, MN, Douglas County, MN, Mille Lacs County, MN, Morrison County, MN, Stearns County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 159 km from the middle of the area, began a volume at 09:55 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
Aug 2, 3:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.9 hours before the alert went out and 158 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: 2637 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 947 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 020955
SVRMPX
MNC009-041-095-097-145-153-021115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
454 AM CDT MON AUG 2 2004

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TODD COUNTY IN CENTRAL MINNESOTA
  MORRISON COUNTY IN CENTRAL MINNESOTA
  MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA
  DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA
  BENTON COUNTY IN CENTRAL MINNESOTA
  STEARNS COUNTY IN CENTRAL MINNESOTA

* UNTIL 615 AM CDT

* AT 451 AM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF
  75 MPH. SIREN ACTIVATION IS SUGGESTED. THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 14 MILES NORTH OF LITTLE FALLS TO LONG
  PRAIRIE TO ALEXANDRIA...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...   
  ALEXANDRIA.
  LITTLE FALLS.
  LONG PRAIRIE.
  ONAMIA.
  SAUK RAPIDS.

LAT...LON 4638 9504 4584 9545 4555 9412 4616 9358

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 2, 3:56 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	79 min
Aug 2, 6:36 AM CDT	Severe Thunderstorm Warning	MPX	Douglas	54 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2004 Every severe thunderstorm warning 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.