Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 210, NWS Twin Cities, MN

July 28, 2002Blue Earth County, Nicollet County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 28, 2002, 5:21 PM CDT for Blue Earth County, Nicollet County, Minnesota. It was in force for 54 min. 2 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 28, 2002, 5:21 PM CDT (22:21 UTC)
Expired
Jul 28, 2002, 6:15 PM CDT
In force
54 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Blue Earth County, MN, Nicollet County, MN

The radar

The Minneapolis radar (KMPX), 88 km from the middle of the area, began a volume at 22:20 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 28, 5:40 PM CDTTornado F0Klossner, MNTouched down in field. Corn flattened.
Jul 28, 5:50 PM CDTThunderstorm Wind 52 EBernadotte, MNFew trees toppled. Corn and beans flattened.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 28, 3:55 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.4 hours before the alert went out and 87 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.

084 
WUUS53 KMPX 282221
SVRMSP
MNC013-103-282315-

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA
  BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 615 PM CDT

* AT 519 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS     
  ALONG A LINE EXTENDING FROM 7 MILES NORTHWEST OF NEW ULM TO 12     
  MILES NORTHEAST OF ST JAMES TO 8 MILES SOUTH OF ST                 
  JAMES...MOVING EAST AT 20 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  MANKATO.
  CRYSTAL.
  GOOD THUNDER.
  KLOSSNER.
  EAGLE LAKE.
  ST. PETER.

THIS IS A DANGEROUS STORM...STAY INDOORS AWAY FROM WINDOWS. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 4445 9468 4430 9438 4388 9435 4388 9381
          4427 9403 4443 9401

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, 4:28 PM CDTSevere Thunderstorm WarningMPXRedwood32 min
Jul 28, 4:32 PM CDTSevere Thunderstorm WarningMPXRice43 min
Jul 28, 4:58 PM CDTSevere Thunderstorm WarningMPXScott47 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.