Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 207, NWS Twin Cities, MN

July 28, 2002Redwood County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 28, 2002, 4:28 PM CDT for Redwood County, Minnesota. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 28, 2002, 4:28 PM CDT (21:28 UTC)
Expired
Jul 28, 2002, 5:00 PM CDT
In force
32 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Redwood County, MN

The radar

The Minneapolis radar (KMPX), 139 km from the middle of the area, began a volume at 21:30 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 28, 1:00 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 137 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 2002-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1056 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 2002-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
1056 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
1511 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

041 
WUUS53 KMPX 282128
SVRMSP
MNC127-282200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
428 PM CDT SUN JUL 28 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  REDWOOD COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 500 PM CDT

* AT 428 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL AND DAMAGING WINDS 5 MILES WEST OF WANDA...OR ABOUT 19 MILES
  SOUTHWEST OF REDWOOD FALLS...MOVING EAST AT 25 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  CLEMENTS.
  LAMBERTON.
  MORGAN.
  WABASSO.
  WANDA.

THIS WARNING EXTENDS THE PREVIOUS SEVERE THUNDERSTORM WARNING FOR 
REDWOOD COUNTY.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER 
IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4440 9535 4422 9535 4422 9517 4430 9511
          4432 9493 4449 9493

RAH/SEB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 3:39 PM CDTSevere Thunderstorm WarningMPXRedwood51 min
Jul 28, 4:07 PM CDTSevere Thunderstorm WarningMPXLe Sueur38 min
Jul 28, 4:13 PM CDTSevere Thunderstorm WarningMPXNicollet, Sibley47 min
Jul 28, 4:17 PM CDTSevere Thunderstorm WarningMPXRenville58 min
Jul 28, 4:32 PM CDTSevere Thunderstorm WarningMPXRice43 min
Jul 28, 4:58 PM CDTSevere Thunderstorm WarningMPXScott47 min
Jul 28, 5:21 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Nicollet54 min
Jul 28, 5:22 PM CDTSevere Thunderstorm WarningMPXDakota38 min
Jul 28, 5:41 PM CDTTornado WarningMPXNicollet34 min
Jul 28, 5:43 PM CDTFlash Flood WarningMPXMcLeod, Sibley2 hr
Jul 28, 5:43 PM CDTSevere Thunderstorm WarningMPXGoodhue47 min
Jul 28, 5:45 PM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley45 min
Jul 28, 5:46 PM CDTSevere Thunderstorm WarningMPXScott44 min
Jul 28, 5:49 PM CDTTornado WarningMPXGoodhue26 min
Jul 28, 6:06 PM CDTFlash Flood WarningMPXAnoka, Carver, Dakota, Hennepin, Ramsey, Scott and 1 more3 hr
Jul 28, 6:11 PM CDTSevere Thunderstorm WarningMPXWaseca49 min
Jul 28, 6:23 PM CDTSevere Thunderstorm WarningMPXRice52 min
Jul 28, 6:34 PM CDTSevere Thunderstorm WarningMPXSteele41 min
Jul 28, 6:39 PM CDTTornado WarningMPXRice36 min
Jul 28, 6:50 PM CDTTornado WarningMPXGoodhue25 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2002Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.