Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 216, NWS Twin Cities, MN

July 3, 2007Freeborn County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 3, 2007, 6:37 PM CDT for Freeborn County, Minnesota. It was in force for 53 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 3, 2007, 6:37 PM CDT (23:37 UTC)
Expired
Jul 3, 2007, 7:30 PM CDT
In force
53 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Freeborn County, MN

The radar

The Minneapolis radar (KMPX), 127 km from the middle of the area, began a volume at 23:37 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 3, 6:38 PM CDTHAIL 0.75Hartland, 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.

IssuedProductOfficeLasted
Jul 3, 12:10 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.6 hours before the alert went out and 127 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 2007-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1198 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2007-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
1198 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
975 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
89 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 032337
SVRMPX
MNC047-040030-
/O.NEW.KMPX.SV.W.0216.070703T2337Z-070704T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
637 PM CDT TUE JUL 3 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 730 PM CDT

* AT 632 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 10 MILES NORTH OF
  ALDEN...OR ABOUT 14 MILES NORTHWEST OF ALBERT LEA...AND MOVING EAST
  AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CLARKS GROVE...
  ALBERT LEA...
  GENEVA...
  GLENVILLE...

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 4384 9364 4352 9365 4352 9306 4384 9306

$$
1 follow-up statement
000 
WWUS53 KMPX 040024
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
724 PM CDT TUE JUL 3 2007

MNC047-040034-
/O.EXP.KMPX.SV.W.0216.000000T0000Z-070704T0030Z/
FREEBORN MN-
724 PM CDT TUE JUL 3 2007

...THE SEVERE THUNDERSTORM WARNING FOR FREEBORN COUNTY EXPIRES AT 730
PM CDT...

SEVERE STORMS HAVE WEAKENED. HOWEVER...MORE THUNDERSTORMS WERE 
DEVELOPING IN THE AREA...REMAIN ALERT FOR POSSIBLE ADDITIONAL 
WARNINGS.

LAT...LON 4384 9364 4352 9365 4352 9306 4384 9306

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 11:56 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker, Stearns49 min
Jul 3, 12:46 PM CDTSevere Thunderstorm WarningMPXSherburne, Stearns, Wright44 min
Jul 3, 1:54 PM CDTSevere Thunderstorm WarningMPXDouglas, Todd51 min
Jul 3, 2:04 PM CDTSevere Thunderstorm WarningMPXDakota, Rice27 min
Jul 3, 2:30 PM CDTSevere Thunderstorm WarningMPXChisago45 min
Jul 3, 2:51 PM CDTSevere Thunderstorm WarningMPXDouglas, Todd39 min
Jul 3, 3:06 PM CDTSevere Thunderstorm WarningMPXStearns39 min
Jul 3, 3:40 PM CDTSevere Thunderstorm WarningMPXStearns45 min
Jul 3, 4:48 PM CDTSevere Thunderstorm WarningMPXDakota, Rice, Scott42 min
Jul 3, 5:13 PM CDTSevere Thunderstorm WarningMPXWright62 min
Jul 3, 5:26 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice64 min
Jul 3, 5:36 PM CDTSevere Thunderstorm WarningMPXSteele, Waseca54 min
Jul 3, 5:46 PM CDTSevere Thunderstorm WarningMPXBlue Earth44 min
Jul 3, 6:13 PM CDTTornado WarningMPXFaribault, Freeborn32 min
Jul 3, 6:27 PM CDTSevere Thunderstorm WarningMPXSteele, Waseca63 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.