Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 276, NWS Twin Cities, MN

August 11, 20074 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 11, 2007, 1:57 AM CDT for 4 counties in Minnesota. It was in force for 63 min. 3 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 11, 2007, 1:57 AM CDT (06:57 UTC)
Expired: Aug 11, 2007, 3:00 AM CDT
In force: 63 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Benton County, MN, Sherburne County, MN, Stearns County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 99 km from the middle of the area, began a volume at 06:58 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 11, 2:00 AM CDT	TSTM WND DMG	Richmond, MN	NUMEROUS TREES DOWN. LIGHT POLES DOWN. SHEDS BLOWN DOWN. A BOAT AND A DOCK WERE BLOWN ACROSS HIGHWAY 23. OVERTURNED PONTOONS IN RICHMOND MARINE.
Aug 11, 2:28 AM CDT	TSTM WND DMG	St Cloud, MN	POWER OUTAGES IN ST. CLOUD.
Aug 11, 2:39 AM CDT	TSTM WND GST 60	Clearwater, MN	DEPUTY REPORTED ESTIMATED WINDS IN EXCESS OF 60 MPH.

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 11, 1:31 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.0 hours before the alert went out and 97 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: 639 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1768 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 110657
SVRMPX
MNC009-141-145-171-110800-
/O.NEW.KMPX.SV.W.0276.070811T0657Z-070811T0800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
157 AM CDT SAT AUG 11 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  STEARNS COUNTY IN CENTRAL MINNESOTA...
  SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  WRIGHT COUNTY IN CENTRAL MINNESOTA...
  BENTON COUNTY IN CENTRAL MINNESOTA...

* UNTIL 300 AM CDT

* AT 154 AM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 65
  MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 8 MILES
  WEST OF RICE TO 6 MILES EAST OF PAYNESVILLE...AND MOVING EAST AT 45
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  RICE...
  SARTELL...
  SAUK RAPIDS...
  ST CLOUD...
  FOLEY...
  BECKER...
  MONTICELLO...
  BIG LAKE...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

LAT...LON 4577 9462 4535 9474 4521 9370 4578 9379

$$

KAT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 11:53 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	67 min
Aug 10, 11:59 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	46 min
Aug 11, 12:16 AM CDT	Severe Thunderstorm Warning	MPX	Stevens	59 min
Aug 11, 12:28 AM CDT	Severe Thunderstorm Warning	MPX	Swift	62 min
Aug 11, 12:34 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi	56 min
Aug 11, 12:52 AM CDT	Severe Thunderstorm Warning	MPX	Pope	53 min
Aug 11, 1:07 AM CDT	Severe Thunderstorm Warning	MPX	Stearns	53 min
Aug 11, 1:27 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	44 min
Aug 11, 1:34 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Swift	56 min
Aug 11, 1:47 AM CDT	Severe Thunderstorm Warning	MPX	Morrison	58 min
Aug 11, 1:54 AM CDT	Severe Thunderstorm Warning	MPX	Meeker	66 min
Aug 11, 2:01 AM CDT	Severe Thunderstorm Warning	MPX	Renville	59 min
Aug 11, 2:33 AM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod	57 min
Aug 11, 2:44 AM CDT	Severe Thunderstorm Warning	MPX	Hennepin	61 min
Aug 11, 2:53 AM CDT	Flash Flood Warning	MPX	Anoka, Hennepin, Ramsey	3 hr
Aug 11, 2:53 AM CDT	Flash Flood Warning	MPX	Anoka, Dakota, Hennepin, Ramsey	3 hr
Aug 11, 3:01 AM CDT	Severe Thunderstorm Warning	MPX	Wright	29 min
Aug 11, 3:07 AM CDT	Flash Flood Warning	MPX	Wright	113 min
Aug 11, 3:15 AM CDT	Severe Thunderstorm Warning	MPX	Sibley	44 min
Aug 11, 3:27 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Ramsey, Washington	63 min
Aug 11, 3:40 AM CDT	Flash Flood Warning	MPX	Scott	65 min
Aug 11, 3:51 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue	54 min
Aug 11, 4:39 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur	39 min
Aug 11, 6:04 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	56 min
Aug 11, 6:39 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod	66 min
Aug 11, 6:56 PM CDT	Severe Thunderstorm Warning	MPX	Wright	49 min
Aug 11, 6:58 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	62 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.