Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 232, NWS Twin Cities, MN

July 8, 2007Dakota County, Ramsey County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 8, 2007, 3:47 PM CDT for Dakota County, Ramsey County, Washington County, Minnesota. It was in force for 58 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 8, 2007, 3:47 PM CDT (20:47 UTC)
Expired: Jul 8, 2007, 4:45 PM CDT
In force: 58 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Dakota County, MN, Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 39 km from the middle of the area, began a volume at 20:49 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 8, 3:57 PM CDT	HAIL 1.75	Eagan, MN
Jul 8, 3:58 PM CDT	HAIL 1.5	St Paul, MN	HIGHLAND PARK AREA. HAIL STARTED FALLING AT THE SIZE OF NICKELS AT 347PM...CHANGED TO QUARTER AT 353PM THEN 1 1/2 INCH HAIL AT 358PM.

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 8, 1:28 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.8 hours before the alert went out and 42 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: 432 J/kg
Mixed-layer CIN: -564 J/kg
Mixed-layer LCL: 2355 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 107 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 082047
SVRMPX
MNC037-123-163-082145-
/O.NEW.KMPX.SV.W.0232.070708T2047Z-070708T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
347 PM CDT SUN JUL 8 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 445 PM CDT

* AT 345 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED 7
  MILES NORTHWEST OF EAGAN...OR ABOUT OVER MINNEAPOLIS...AND MOVING
  EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROSEVILLE...
  EAGAN...
  ST PAUL...
  WEST ST PAUL...
  SOUTH ST PAUL...
  MAPLEWOOD...
  NORTH ST PAUL...
  OAKDALE...
  WOODBURY...
  COTTAGE GROVE...

STAY INDOORS...AND AWAY FROM WINDOWS.

LAT...LON 4504 9320 4489 9316 4479 9330 4476 9281
      4501 9278

$$

JPR

2 follow-up statements

000 
WWUS53 KMPX 082101
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
359 PM CDT SUN JUL 8 2007

MNC037-123-163-082145-
/O.CON.KMPX.SV.W.0232.000000T0000Z-070708T2145Z/
WASHINGTON MN-RAMSEY MN-DAKOTA MN-
359 PM CDT SUN JUL 8 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR DAKOTA...RAMSEY AND WASHINGTON COUNTIES...

AT 357 PM CDT...GOLF BALL SIZE HAIL WAS REPORTED IN EAGAN. AT 358 PM 
CDT...ONE AND ONE-HALF INCH HAIL WAS REPORTED IN HIGHLAND PARK WITH 
THIS STORM. 

AT 357 PM CDT...THESE STORMS WERE LOCATED ALONG A LINE EXTENDING 
FROM LITTLE CANADA TO 4 MILES SOUTH OF EAGAN...AND MOVING EAST AT 25 
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE SUNFISH...LILYDALE...
LANDFALL...WOODBURY...WEST ST PAUL...ST PAUL PARK...ST PAUL...SOUTH
ST PAUL...OAKDALE AND NORTH ST PAUL.

LAT...LON 4503 9313 4489 9316 4475 9322 4476 9281
      4501 9278

$$

000 
WWUS53 KMPX 082140
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
438 PM CDT SUN JUL 8 2007

MNC037-123-163-082148-
/O.EXP.KMPX.SV.W.0232.000000T0000Z-070708T2145Z/
WASHINGTON MN-RAMSEY MN-DAKOTA MN-
438 PM CDT SUN JUL 8 2007

...THE SEVERE THUNDERSTORM WARNING FOR DAKOTA...RAMSEY AND WASHINGTON
COUNTIES EXPIRES AT 445 PM CDT...

SEVERE STORMS WERE ABOUT TO MOVE OUT OF THE AREA. HOWEVER 
THUNDERSTORMS REMAIN OVER EASTERN WASHINGTON AND DAKOTA COUNTIES AND 
COULD PRODUCE HALF INCH HAIL...REMAIN ALERT FOR POSSIBLE ADDITIONAL 
WARNINGS.

LAT...LON 4503 9313 4489 9316 4475 9322 4476 9281
      4501 9278

$$

JPR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 12:57 PM CDT	Severe Thunderstorm Warning	MPX	Wright	63 min
Jul 8, 1:09 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne	51 min
Jul 8, 1:32 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti	58 min
Jul 8, 2:03 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne	27 min
Jul 8, 2:12 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	63 min
Jul 8, 2:29 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Washington	46 min
Jul 8, 2:48 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	57 min
Jul 8, 3:01 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod	59 min
Jul 8, 3:31 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne	26 min
Jul 8, 3:44 PM CDT	Severe Thunderstorm Warning	MPX	Anoka	61 min
Jul 8, 6:14 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet	29 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2007 Every 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.