Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 249, NWS Twin Cities, MN

July 26, 2007Mille Lacs County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 26, 2007, 2:50 PM CDT for Mille Lacs County, Minnesota. It was in force for 40 min. 1 report 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 26, 2007, 2:50 PM CDT (19:50 UTC)
Expired: Jul 26, 2007, 3:30 PM CDT
In force: 40 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Mille Lacs County, MN

The radar

The Minneapolis radar (KMPX), 130 km from the middle of the area, began a volume at 19:51 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 26, 2:55 PM CDT	HAIL 1	10 N Milaca, MN	HAILED UNTIL 300 PM.

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 26, 1:16 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.8 hours before the alert went out and 130 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: 1237 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 1075 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: -10 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 261951
SVRMPX
MNC095-262030-
/O.NEW.KMPX.SV.W.0249.070726T1950Z-070726T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
250 PM CDT THU JUL 26 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 330 PM CDT

* AT 247 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 10 MILES SOUTH OF
  ONAMIA...OR ABOUT 12 MILES NORTH OF MILACA...AND MOVING EAST AT 15
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  ONAMIA...
  ISLE...
  PAGE...
  BOCK...

STAY INDOORS...AND AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
THURSDAY EVENING FOR SOUTHERN MINNESOTA.

LAT...LON 4606 9376 4598 9376 4582 9376 4583 9352
      4598 9352 4599 9345 4623 9343 4623 9375

$$

MDB

2 follow-up statements

000 
WWUS53 KMPX 262012
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
312 PM CDT THU JUL 26 2007

MNC095-262030-
/O.CON.KMPX.SV.W.0249.000000T0000Z-070726T2030Z/
MILLE LACS MN-
312 PM CDT THU JUL 26 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT
FOR MILLE LACS COUNTY...

AT 308 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH.  THIS STORM WAS LOCATED 13 MILES SOUTH OF ONAMIA...OR ABOUT 8
MILES NORTHWEST OF OGILVIE...AND MOVING EAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE WAHKON AND ONAMIA.

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 4606 9376 4598 9376 4582 9376 4583 9352
      4598 9352 4599 9345 4614 9344 4609 9373

$$

000 
WWUS53 KMPX 262027
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
327 PM CDT THU JUL 26 2007

MNC095-262037-
/O.EXP.KMPX.SV.W.0249.000000T0000Z-070726T2030Z/
MILLE LACS MN-
327 PM CDT THU JUL 26 2007

...THE SEVERE THUNDERSTORM WARNING FOR MILLE LACS COUNTY EXPIRES AT
330 PM CDT...

SEVERE STORMS HAD WEAKENED AND MOVED OUT OF THE COUNTY. 
HOWEVER...MORE THUNDERSTORMS WERE DEVELOPING IN THE AREA. REMAIN 
ALERT FOR POSSIBLE ADDITIONAL WARNINGS.

PRIOR TO WEAKENING AND MOVING OUT OF THE COUNTY...THE STORMS 
PRODUCED QUARTER SIZE HAIL 10 MILES NORTH OF MILACA...AT 255 PM.

LAT...LON 4606 9376 4598 9376 4582 9376 4583 9352
      4598 9352 4599 9345 4614 9344 4609 9373

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 12:35 PM CDT	Severe Thunderstorm Warning	MPX	Todd	40 min
Jul 26, 2:55 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	50 min
Jul 26, 3:07 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Ramsey	53 min
Jul 26, 3:34 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	41 min
Jul 26, 3:46 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	59 min
Jul 26, 3:50 PM CDT	Severe Thunderstorm Warning	MPX	Washington	55 min
Jul 26, 4:44 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault	46 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.