Alert archive / Minnesota / Flash Flood Warnings in 2002

Flash Flood Warning 41, NWS Twin Cities, MN

September 6, 2002Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Sep 6, 2002, 3:23 AM CDT for Hennepin County, Wright County, Minnesota. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 6, 2002, 3:23 AM CDT (08:23 UTC)
Expired
Sep 6, 2002, 7:00 AM CDT
In force
4 hr
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Hennepin County, MN, Wright County, MN

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.4 hours before the alert went out and 38 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 00:00Z on 2002-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1089 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 00:00Z on 2002-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 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
1089 J/kg
Mixed-layer CIN
-95 J/kg
Mixed-layer LCL
1122 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
298 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KMPX 060823
FFWMSP
MNC053-171-061200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
320 AM CDT FRI SEP 6 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WRIGHT COUNTY IN CENTRAL MINNESOTA
  NORTHWEST HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 700 AM CDT

* AT 320 AM CDT...RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN
  OVER THE WARNED AREA.

* THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING OVER THE WARNED AREA...
  RESULTING IN EXCESSIVE RAINFALL.

* TOWNS INCLUDED 
  BUFFALO
  MAPLE LAKE
  ROCKFORD
  ST MICHAEL
  CORCORAN

ABSOLUTELY DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER
COVERS THE ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED. MOVE TO HIGHER GROUND.

LAT...LON 4531 9388 4515 9337 4499 9351 4499 9362
          4508 9420 4535 9408

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 9:08 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright37 min
Sep 5, 9:40 PM CDTSevere Thunderstorm WarningMPXTodd50 min
Sep 5, 9:43 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright62 min
Sep 5, 9:57 PM CDTTornado WarningMPXWright48 min
Sep 5, 10:44 PM CDTSevere Thunderstorm WarningMPXWright46 min
Sep 5, 10:59 PM CDTSevere Thunderstorm WarningMPXBenton, Sherburne, Stearns46 min

Nearby

Flash Flood Warnings in Minnesota, 2002Every flash flood 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.