Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 24, NWS Twin Cities, MN

April 30, 2007Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 30, 2007, 7:01 PM CDT for Hennepin County, Wright County, Minnesota. It was in force for 44 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
Apr 30, 2007, 7:01 PM CDT (00:01 UTC)
Expired
Apr 30, 2007, 7:45 PM CDT
In force
44 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 25 km from the middle of the area, began a volume at 00:01 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

TimeReportWhereRemark
Apr 30, 7:17 PM CDTHAIL 0.75Long Lake, MNGROUND IS WHITE WITH HAIL
Apr 30, 7:22 PM CDTHAIL 0.75Delano, MN

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.0 hours before the alert went out and 24 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 00:00Z on 2007-05-01Temperature 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, Minneapolis, MN at 00:00Z on 2007-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 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
1551 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
305 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 010002
SVRMPX
MNC053-171-010045-
/O.NEW.KMPX.SV.W.0024.070501T0001Z-070501T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
701 PM CDT MON APR 30 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 745 PM CDT

* AT 657 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...   
  CAPABLE OF PRODUCING NICKEL SIZE HAIL.   THIS STORM WAS LOCATED 6  
  MILES SOUTHWEST OF DELANO...OR ABOUT 25   MILES EAST OF            
  HUTCHINSON...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DELANO...
  MAPLE GROVE...
  PLYMOUTH...

STAY INDOORS...AND AWAY FROM WINDOWS.

LAT...LON 4509 9396 4497 9396 4497 9386 4496 9339
      4512 9339

$$
2 follow-up statements
000 
WWUS53 KMPX 010020
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
717 PM CDT MON APR 30 2007

MNC053-171-010045-
/O.CON.KMPX.SV.W.0024.000000T0000Z-070501T0045Z/
WRIGHT MN-HENNEPIN MN-
717 PM CDT MON APR 30 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR HENNEPIN AND WRIGHT COUNTIES...

AT 710 PM CDT...HAIL JUST UNDER DIME SIZE WAS REPORTED IN GOLDEN 
VALLEY. 

AT 713 PM CDT...THIS SEVERE STORM WAS LOCATED NEAR MAPLE PLAIN...OR 
ABOUT 5 MILES NORTHWEST OF EXCELSIOR...AND MOVING EAST AT 45 MPH.

ANOTHER STRONG STORM WAS MOVING THROUGH THE SOUTHEAST CORNER OF 
WRIGHT COUNTY.  

OTHER LOCATIONS IN THE WARNING INCLUDE WAYZATA...MEDICINE 
LAKE....ROCKFORD...ROBBINSDALE...PLYMOUTH...OSSEO...NEW 
HOPE...MONTROSE...MEDINA...MAPLE PLAIN...MAPLE GROVE...GOLDEN 
VALLEY...DELANO...CRYSTAL...AND BROOKLYN PARK.

LAT...LON 4509 9396 4497 9396 4497 9386 4496 9327
      4512 9331

$$
JPR
000 
WWUS53 KMPX 010044
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
741 PM CDT MON APR 30 2007

MNC053-171-010051-
/O.EXP.KMPX.SV.W.0024.000000T0000Z-070501T0045Z/
WRIGHT MN-HENNEPIN MN-
741 PM CDT MON APR 30 2007

...THE SEVERE THUNDERSTORM WARNING FOR HENNEPIN AND WRIGHT COUNTIES
EXPIRES AT 745 PM CDT...

REPORTS OF DIME SIZE HAIL WERE REPORTED FROM DELANO AND LONG LAKE AT 
AROUND 720 PM.

SEVERE STORMS WERE ABOUT TO MOVE OUT OF EASTERN HENNEPIN COUNTY. 
HOWEVER...THUNDERSTORMS REMAIN STRONG...REMAIN ALERT FOR POSSIBLE 
ADDITIONAL WARNINGS.

LAT...LON 4509 9396 4497 9396 4497 9386 4496 9327
      4512 9331

$$
JPR

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 7:27 PM CDTSevere Thunderstorm WarningMPXMcLeod33 min
Apr 30, 7:50 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin25 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.