Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 317, NWS Twin Cities, MN

August 13, 2007Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 13, 2007, 10:42 PM CDT for Hennepin County, Wright County, Minnesota. It was in force for 63 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: Aug 13, 2007, 10:42 PM CDT (03:42 UTC)
Expired: Aug 13, 2007, 11:45 PM CDT
In force: 63 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), 24 km from the middle of the area, began a volume at 03:44 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
Aug 13, 10:44 PM CDT	TSTM WND DMG	Deephaven, MN	8-12 INCH TREE BRANCH DOWN, ON PARK PLACE, TAKING DOWN TELEPHONE POLE.
Aug 13, 11:10 PM CDT	HAIL 0.88	Crystal, 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
Aug 13, 6:59 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.7 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-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: 2096 J/kg
Mixed-layer CIN: -245 J/kg
Mixed-layer LCL: 1133 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 409 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 140342
SVRMPX
MNC053-171-140445-
/O.NEW.KMPX.SV.W.0317.070814T0342Z-070814T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1042 PM CDT MON AUG 13 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 1145 PM CDT

* AT 1040 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 65 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 4 MILES NORTHEAST OF ROGERS TO 8 MILES
  SOUTHWEST OF ROGERS TO 4 MILES SOUTHWEST OF DELANO...AND MOVING
  SOUTHEAST AT 45 MPH.

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

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 4527 9358 4514 9372 4503 9389 4494 9368
      4490 9352 4488 9326 4510 9329

$$

2 follow-up statements

000 
WWUS53 KMPX 140418
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1118 PM CDT MON AUG 13 2007

MNC171-140428-
/O.CAN.KMPX.SV.W.0317.000000T0000Z-070814T0445Z/
WRIGHT MN-
1118 PM CDT MON AUG 13 2007

...THE SEVERE THUNDERSTORM WARNING FOR WRIGHT COUNTY IS CANCELLED...

ISOLATED SHOWERS AND THUNDERSTROMS WILL CONTINUE OVER THE NEXT HOUR 
BUT ARE EXPECTED TO REMAIN BELOW SEVERE LIMITS.


LAT...LON 4520 9344 4505 9358 4497 9374 4494 9368
      4483 9340 4488 9322 4509 9328

$$

MNC053-140445-
/O.CON.KMPX.SV.W.0317.000000T0000Z-070814T0445Z/
HENNEPIN MN-
1118 PM CDT MON AUG 13 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR HENNEPIN COUNTY...

AT 1114 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 65
MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 3 MILES
SOUTHEAST OF MINNEAPOLIS TO 3 MILES SOUTHWEST OF RICHFIELD TO 5 MILES
SOUTH OF MINNETONKA...AND MOVING SOUTHEAST AT 45 MPH.

STRONG WIND GUSTS IN EXCESS OF 50 MPH ARE POSSIBLE NEAR BROOKLYN 
PARK.

OTHER LOCATIONS IN THE WARNING INCLUDE WOODLAND...WAYZATA...ORONO...
MINNETONKA...MEDICINE LAKE...EXCELSIOR...DEEPHAVEN...THE LAKE
MINNETONKA AREA...ST LOUIS PARK AND ROBBINSDALE.

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 4520 9344 4505 9358 4497 9374 4494 9368
      4483 9340 4488 9322 4509 9328

$$

MDB

000 
WWUS53 KMPX 140441
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1141 PM CDT MON AUG 13 2007

MNC053-140451-
/O.EXP.KMPX.SV.W.0317.000000T0000Z-070814T0445Z/
HENNEPIN MN-
1141 PM CDT MON AUG 13 2007

...THE SEVERE THUNDERSTORM WARNING FOR HENNEPIN COUNTY EXPIRES AT
1145 PM CDT...

SEVERE STORMS WERE ABOUT TO MOVE OUT OF THE COUNTY. HOWEVER...MORE 
THUNDERSTORMS WILL BE POSSIBLE IN THE AREA...REMAIN ALERT FOR 
POSSIBLE ADDITIONAL WARNINGS.

LAT...LON 4520 9344 4505 9358 4497 9374 4494 9368
      4483 9340 4488 9322 4509 9328

$$

MDB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 7:44 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs	61 min
Aug 13, 7:57 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	18 min
Aug 13, 8:08 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	52 min
Aug 13, 8:17 PM CDT	Severe Thunderstorm Warning	MPX	Isanti, Sherburne	58 min
Aug 13, 8:43 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago	62 min
Aug 13, 8:47 PM CDT	Severe Thunderstorm Warning	MPX	Stearns, Todd	58 min
Aug 13, 8:52 PM CDT	Tornado Warning	MPX	Anoka, Sherburne	23 min
Aug 13, 9:15 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Ramsey, Washington	60 min
Aug 13, 9:45 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Stearns, Wright	60 min
Aug 13, 10:46 PM CDT	Flash Flood Warning	MPX	Hennepin	119 min
Aug 13, 11:30 PM CDT	Severe Thunderstorm Warning	MPX	Washington	60 min
Aug 13, 11:37 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	53 min
Aug 13, 11:48 PM CDT	Flash Flood Warning	MPX	Dakota, Scott	117 min
Aug 13, 11:51 PM CDT	Severe Thunderstorm Warning	MPX	Scott	29 min
Aug 14, 12:26 AM CDT	Flash Flood Warning	MPX	Goodhue	2 hr
Aug 14, 12:29 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue	48 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.