Alert archive / Wisconsin / Flash Flood Warnings in 2002

Flash Flood Warning 27, NWS Twin Cities, MN

July 30, 2002Chippewa County, Dunn County, Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Jul 30, 2002, 6:02 PM CDT for Chippewa County, Dunn County, Eau Claire County, Wisconsin. It was in force for 88 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 30, 2002, 6:02 PM CDT (23:02 UTC)
Expired
Jul 30, 2002, 7:30 PM CDT
In force
88 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Chippewa County, WI, Dunn County, WI, Eau Claire County, WI

The radar

The La Crosse radar (KARX), 131 km from the middle of the area, began a volume at 23:04 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.0 hours before the alert went out and 160 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 2002-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 767 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 2002-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 199 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
767 J/kg
Mixed-layer CIN
-274 J/kg
Mixed-layer LCL
2024 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
199 m²/s²
0-3 km storm-relative helicity
280 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KMPX 302302
FFWMSP
WIC017-033-035-310030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
600 PM CDT TUE JUL 30 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN
  DUNN COUNTY IN WEST CENTRAL WISCONSIN
  EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN

* UNTIL 730 PM CDT

* AT 600 PM CDT...RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY 
RAIN  OVER THE WARNED AREA. HEAVY RAIN WILL CONTINUE UNTIL 630 PM IN 
PORTIONS OF CHIPPEWA...DUNN AND EAU CLAIRE COUNTIES.  FLOODING OF 
ROADWAYS AND LOW AREAS IS LIKELY.

*

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 4517 9127 4467 9113 4469 9210 4513 9208

$$
EDWARDS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 4:30 PM CDTSevere Thunderstorm WarningMPXPierce, Saint Croix30 min
Jul 30, 4:41 PM CDTSevere Thunderstorm WarningMPXDunn49 min
Jul 30, 5:19 PM CDTSevere Thunderstorm WarningMPXPepin41 min
Jul 30, 5:30 PM CDTSevere Thunderstorm WarningMPXDunn45 min
Jul 30, 5:39 PM CDTSevere Thunderstorm WarningMPXEau Claire66 min
Jul 30, 6:16 PM CDTSevere Thunderstorm WarningMPXChippewa44 min

Nearby

Flash Flood Warnings in Wisconsin, 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; radar from the NEXRAD Level II archive.