Alert archive / Minnesota / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 203, NWS Twin Cities, MN

July 31, 2004Carver County, Hennepin County, Scott County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 31, 2004, 10:28 PM CDT for Carver County, Hennepin County, Scott County, Minnesota. It was in force for 47 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 31, 2004, 10:28 PM CDT (03:28 UTC)
Expired: Jul 31, 2004, 11:15 PM CDT
In force: 47 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Carver County, MN, Hennepin County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 1 km from the middle of the area, began a volume at 03:28 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.

What was reported inside it

Time	Report	Where	Remark
Jul 31, 10:36 PM CDT	HAIL 0.75	Edina, MN
Jul 31, 10:41 PM CDT	HAIL 0.75	Eden Prairie, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 31, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.5 hours before the alert went out and 2 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: 465 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1194 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 191 m²/s²
0-3 km storm-relative helicity: 395 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 010328
SVRMPX
MNC019-053-139-010415-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1028 PM CDT SAT JUL 31 2004

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA
  CARVER COUNTY IN EAST CENTRAL MINNESOTA
  SCOTT COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 1115 PM CDT

* AT 1020 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING LARGE HAIL. THIS STORM WAS LOCATED 11 MILES
  SOUTHWEST OF MINNETONKA...OR ABOUT 10 MILES SOUTHWEST OF
  EXCELSIOR...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BLOOMINGTON.
  EDEN PRAIRIE.
  MINNETONKA.
  CHANHASSEN.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4493 9376 4475 9378 4475 9336 4493 9321

$$

RAH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 7:32 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Watonwan	58 min
Jul 31, 10:46 PM CDT	Severe Thunderstorm Warning	MPX	McLeod	29 min
Jul 31, 10:51 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Ramsey, Washington	39 min
Aug 1, 3:51 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Nicollet	39 min
Aug 1, 3:53 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Nicollet	37 min
Aug 1, 5:03 AM CDT	Severe Thunderstorm Warning	MPX	Freeborn	57 min
Aug 1, 5:41 AM CDT	Flash Flood Warning	MPX	Waseca	2 hr
Aug 1, 6:35 AM CDT	Severe Thunderstorm Warning	MPX	Faribault	55 min
Aug 1, 8:10 AM CDT	Flash Flood Warning	MPX	Freeborn	13 hr
Aug 1, 9:38 AM CDT	Severe Thunderstorm Warning	MPX	McLeod	32 min
Aug 1, 10:40 AM CDT	Severe Thunderstorm Warning	MPX	Dakota	50 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.