Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 218, NWS Twin Cities, MN

July 8, 2007Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 8, 2007, 12:57 PM CDT for Wright County, 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
Jul 8, 2007, 12:57 PM CDT (17:57 UTC)
Expired
Jul 8, 2007, 2:00 PM CDT
In force
63 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Wright County, MN

The radar

The Minneapolis radar (KMPX), 56 km from the middle of the area, began a volume at 17:57 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

TimeReportWhereRemark
Jul 8, 1:18 PM CDTHAIL 1.758 Ne Annandale, MN
Jul 8, 1:25 PM CDTHAIL 0.755 W Monticello, MN
Jul 8, 1:40 PM CDTHAIL 2.57 Se Clearwater, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.0 hours before the alert went out and 55 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2007-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 432 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2007-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 208 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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 081756
SVRMPX
MNC171-081900-
/O.NEW.KMPX.SV.W.0218.070708T1757Z-070708T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1257 PM CDT SUN JUL 8 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 200 PM CDT

* AT 1253 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS LOCATED 6
  MILES NORTH OF ANNANDALE...OR ABOUT 15 MILES SOUTH OF ST CLOUD...
  AND MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ANNANDALE...
  MONTICELLO...
  BUFFALO...
  ST MICHAEL...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 4539 9406 4528 9421 4509 9377 4526 9355

$$
2 follow-up statements
000 
WWUS53 KMPX 081815
SVSMPX

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

MNC171-081900-
/O.CON.KMPX.SV.W.0218.000000T0000Z-070708T1900Z/
WRIGHT MN-
115 PM CDT SUN JUL 8 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR WRIGHT COUNTY...

AT 114 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND 
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
ANNANDALE...AND MOVING EAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE SILVER CREEK...HASTY...
ENFIELD...ST MICHAEL...MONTICELLO...MAPLE LAKE...BUFFALO...ANNANDALE
AND ALBERTVILLE.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4539 9406 4528 9421 4509 9377 4526 9355

$$
JPR
000 
WWUS53 KMPX 081845
SVSMPX

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

MNC171-081900-
/O.CON.KMPX.SV.W.0218.000000T0000Z-070708T1900Z/
WRIGHT MN-
142 PM CDT SUN JUL 8 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR WRIGHT COUNTY...

AT 140 PM CDT...TENNIS BALL SIZE HAIL WAS REPORTED 7 MILES SOUTHEAST
OF CLEARWATER.

AT 139 PM CDT...THE SEVERE STORM WAS LOCATED NEAR MONTICELLO...AND 
MOVING SOUTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE SILVER CREEK...ST MICHAEL...
MONTICELLO AND ALBERTVILLE.

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 4534 9392 4525 9403 4514 9374 4526 9355

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 1:09 PM CDTSevere Thunderstorm WarningMPXSherburne51 min
Jul 8, 1:32 PM CDTSevere Thunderstorm WarningMPXAnoka, Isanti58 min
Jul 8, 2:03 PM CDTSevere Thunderstorm WarningMPXSherburne27 min
Jul 8, 2:12 PM CDTSevere Thunderstorm WarningMPXChisago63 min
Jul 8, 2:29 PM CDTSevere Thunderstorm WarningMPXAnoka, Washington46 min
Jul 8, 2:48 PM CDTSevere Thunderstorm WarningMPXHennepin57 min
Jul 8, 3:01 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod59 min
Jul 8, 3:31 PM CDTSevere Thunderstorm WarningMPXSherburne26 min
Jul 8, 3:44 PM CDTSevere Thunderstorm WarningMPXAnoka61 min
Jul 8, 3:47 PM CDTSevere Thunderstorm WarningMPXDakota, Ramsey, Washington58 min
Jul 8, 6:14 PM CDTSevere Thunderstorm WarningMPXNicollet29 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2007Every 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.