Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 217, NWS Twin Cities, MN

July 4, 2007Hennepin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 4, 2007, 5:10 PM CDT for Hennepin County, Minnesota. It was in force for 35 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 4, 2007, 5:10 PM CDT (22:10 UTC)
Expired
Jul 4, 2007, 5:45 PM CDT
In force
35 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Hennepin County, MN

The radar

The Minneapolis radar (KMPX), 20 km from the middle of the area, began a volume at 22:11 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.2 hours before the alert went out and 20 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 2007-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 179 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2007-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.193958Sfc1 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
179 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
855 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 042210
SVRMPX
MNC053-042245-
/O.NEW.KMPX.SV.W.0217.070704T2210Z-070704T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
510 PM CDT WED JUL 4 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 545 PM CDT

* AT 507 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS
  STORM WAS LOCATED 7 MILES WEST OF PLYMOUTH...OR ABOUT 16 MILES WEST
  OF MINNEAPOLIS...AND MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PLYMOUTH...
  MINNETONKA...
  THE LAKE MINNETONKA AREA...
  GOLDEN VALLEY...
  HOPKINS...
  ST LOUIS PARK...
  MINNEAPOLIS...

STAY INDOORS...AND AWAY FROM WINDOWS.

LAT...LON 4511 9357 4506 9370 4487 9350 4496 9325

$$
2 follow-up statements
000 
WWUS53 KMPX 042229
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
527 PM CDT WED JUL 4 2007

MNC053-042245-
/O.CON.KMPX.SV.W.0217.000000T0000Z-070704T2245Z/
HENNEPIN MN-
527 PM CDT WED JUL 4 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR HENNEPIN COUNTY...

AT 524 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING DAMAGING WINDS TO 60 MPH.  THIS 
STORM WAS LOCATED NEAR THE LAKE MINNETONKA AREA...OR ABOUT OVER THE 
LAKE MINNETONKA AREA...AND MOVING SOUTHEAST AT 25 MPH. THE STORM HAS 
WEAKENED OVER THE LAST SEVERAL MINUTES...BUT REMAINS CAPABLE OF 
PRODUCING GUSTY WINDS THAT MAY DOWN TREE LIMBS.

OTHER LOCATIONS IN THE WARNING INCLUDE WOODLAND...MINNETONKA...
DEEPHAVEN...THE LAKE MINNETONKA AREA...RICHFIELD...HOPKINS...EDINA
AND EDEN PRAIRIE.

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

LAT...LON 4499 9347 4493 9356 4482 9345 4485 9325

$$
000 
WWUS53 KMPX 042238
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
535 PM CDT WED JUL 4 2007

MNC053-042245-
/O.EXP.KMPX.SV.W.0217.000000T0000Z-070704T2245Z/
HENNEPIN MN-
535 PM CDT WED JUL 4 2007

...THE SEVERE THUNDERSTORM WARNING FOR HENNEPIN COUNTY EXPIRES AT 545
PM CDT...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING FOR HENNEPIN 
COUNTY HAS WEAKENED TO BELOW SEVERE LIMITS. BRIEF WIND GUSTS TO 45 
OR 50 MPH WILL REMAIN POSSIBLE OVER FAR SOUTHERN SECTIONS OF THE 
COUNTY...INCLUDING EDEN PRAIRIE AND BLOOMINGTON...THROUGH 6 PM.

REPORT ANY SEVERE WEATHER TO LOCAL LAW ENFORCEMENT FOR RELAY TO THE 
NATIONAL WEATHER SERVICE.

LAT...LON 4499 9347 4493 9356 4482 9345 4485 9325

$$

Nearby

Severe Thunderstorm Warnings in Minnesota, 2007Every severe thunderstorm warning in 2007

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.