Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 130, NWS Twin Cities, MN

June 20, 2007Chisago County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 2007, 6:21 PM CDT for Chisago County, Minnesota. It was in force for 54 min. 4 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: Jun 20, 2007, 6:21 PM CDT (23:21 UTC)
Expired: Jun 20, 2007, 7:15 PM CDT
In force: 54 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Chisago County, MN

The radar

The Minneapolis radar (KMPX), 90 km from the middle of the area, began a volume at 23:22 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
Jun 20, 6:32 PM CDT	HAIL 1.75	Harris, MN
Jun 20, 6:34 PM CDT	HAIL 0.88	2 N North Branch, MN
Jun 20, 6:35 PM CDT	HAIL 0.75	North Branch, MN
Jun 20, 6:40 PM CDT	HAIL 4.25	Harris, 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
Jun 20, 4:22 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 11.4 hours before the alert went out and 339 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1400 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 164 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 202321
SVRMPX
MNC025-210015-
/O.NEW.KMPX.SV.W.0130.070620T2321Z-070621T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
621 PM CDT WED JUN 20 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 715 PM CDT

* AT 618 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 13 MILES WEST OF NORTH
  BRANCH...OR ABOUT OVER CAMBRIDGE...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NORTH BRANCH...
  LINDSTROM...
  INTERSTATE 35 BETWEEN HARRIS AND STACY...

STAY INDOORS...AND AWAY FROM WINDOWS.

LAT...LON 4561 9313 4557 9313 4556 9302 4538 9302
      4536 9269 4554 9273 4555 9286 4561 9290

$$

KAT

2 follow-up statements

000 
WWUS53 KMPX 202333
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
633 PM CDT WED JUN 20 2007

MNC025-210015-
/O.CON.KMPX.SV.W.0130.000000T0000Z-070621T0015Z/
CHISAGO MN-
633 PM CDT WED JUN 20 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR CHISAGO COUNTY...

AT 630 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING BASEBALL SIZE HAIL AND 65 MPH 
WINDS.  THIS STORM WAS LOCATED NEAR NORTH BRANCH...OR ABOUT OVER 
NORTH BRANCH...AND MOVING EAST AT 45 MPH.

HAIL TO THE SIZE OF GOLF BALLS HAS BEEN REPORTED NEAR HARRIS WITH 
THIS STORM.

OTHER LOCATIONS IN THE WARNING INCLUDE STACY...SHAFER...NORTH
BRANCH...LINDSTROM...HARRIS...CENTER CITY AND BRANCH.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS

LAT...LON 4561 9313 4557 9313 4556 9302 4538 9302
      4536 9269 4554 9273 4555 9286 4561 9290

$$

KAT

000 
WWUS53 KMPX 210015
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
714 PM CDT WED JUN 20 2007

MNC025-210024-
/O.EXP.KMPX.SV.W.0130.000000T0000Z-070621T0015Z/
CHISAGO MN-
714 PM CDT WED JUN 20 2007

...THE SEVERE THUNDERSTORM WARNING FOR CHISAGO COUNTY EXPIRES AT 715
PM CDT...

SEVERE STORMS HAVE MOVED OUT OF COUNTY. HOWEVER...ADDITIONAL STORMS 
MAY STILL DEVELOP IN THE AREA...SO REMAIN ALERT FOR POSSIBLE 
ADDITIONAL WARNINGS.

PRIOR TO MOVING OUT THE COUNTY...THE SEVERE STORMS PRODUCED VERY 
LARGE AND DAMAGING HAIL IN THE HARRIS AND NORTH BRANCH AREAS.

LAT...LON 4561 9313 4557 9313 4556 9302 4538 9302
      4536 9269 4554 9273 4555 9286 4561 9290

$$

KAT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 4:06 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stearns	54 min
Jun 20, 4:40 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti	32 min
Jun 20, 4:52 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	53 min
Jun 20, 4:55 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	34 min
Jun 20, 5:16 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Sherburne	59 min
Jun 20, 5:24 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	66 min
Jun 20, 5:32 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	43 min
Jun 20, 5:52 PM CDT	Severe Thunderstorm Warning	MPX	Isanti	53 min
Jun 20, 6:09 PM CDT	Tornado Warning	MPX	Wright	36 min
Jun 20, 6:11 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Sherburne	34 min
Jun 20, 6:16 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod	59 min
Jun 20, 6:24 PM CDT	Tornado Warning	MPX	Carver	51 min
Jun 20, 6:28 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	62 min
Jun 20, 6:47 PM CDT	Severe Thunderstorm Warning	MPX	Wright	26 min
Jun 20, 6:57 PM CDT	Severe Thunderstorm Warning	MPX	Scott	63 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.