Alert archive / Minnesota / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 196, NWS Twin Cities, MN

July 21, 2004Chippewa County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 21, 2004, 6:28 PM CDT for Chippewa County, Minnesota. It was in force for 32 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: Jul 21, 2004, 6:28 PM CDT (23:28 UTC)
Expired: Jul 21, 2004, 7:00 PM CDT
In force: 32 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Chippewa County, MN

The radar

The Minneapolis radar (KMPX), 153 km from the middle of the area, began a volume at 23:31 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
Jul 21, 1:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 151 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: 97 J/kg
Mixed-layer CIN: -248 J/kg
Mixed-layer LCL: 981 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 333 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 212328
SVRMPX
MNC023-220000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
628 PM CDT WED JUL 21 2004

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 700 PM CDT

* AT 627 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED NEAR GLUEK...OR ABOUT 12 MILES NORTHEAST OF
  MONTEVIDEO...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CLARA CITY.
  MAYNARD.
  ASBURY.
  GLUEK.

LAT...LON 4515 9558 4494 9569 4488 9556 4492 9531
      4512 9526

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 10:25 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	50 min
Jul 21, 12:06 AM CDT	Severe Thunderstorm Warning	MPX	Nicollet, Sibley	39 min
Jul 21, 12:26 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	49 min
Jul 21, 1:01 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Rice	59 min
Jul 21, 2:04 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue	56 min
Jul 21, 4:44 PM CDT	Severe Thunderstorm Warning	MPX	Todd	46 min
Jul 21, 6:48 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Renville, Yellow Medicine	57 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.