Alert archive / Minnesota / Flash Flood Warnings in 1998

Flash Flood Warning 8, NWS Twin Cities, MN

August 19, 1998Swift County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Aug 19, 1998, 6:55 PM CDT for Swift County, Minnesota. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 19, 1998, 6:55 PM CDT (23:55 UTC)
Expired
Aug 19, 1998, 10:00 PM CDT
In force
3 hr
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Swift County, MN

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.9 hours before the alert went out and 170 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 1998-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 585 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 1998-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 265 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
585 J/kg
Mixed-layer CIN
-256 J/kg
Mixed-layer LCL
475 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
265 m²/s²
0-3 km storm-relative helicity
317 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 192356
FFWMSP
MNC151-200300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
655 PM CDT WED AUG 19 1998

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS
ISSUED A

* FLASH FLOOD WARNING FOR...
  SWIFT COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 1000 PM CDT

* AT 650 PM CDT ...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN COVERING MOST OF SWIFT
  COUNTY...MOVING EAST AT 20 MPH.

* THUNDERSTORMS WITH HEAVY RAIN WILL CONTINUE TO TRACK OVER THE SAME
  AREAS THROUGH 9 PM WITH DOPPLER RADAR BASED RAINFALL ESTIMATES OF
  1 TO 2 INCHES PER HOUR.  A SEVERE WEATHER SPOTTER REPORTED 2
  INCHES OF RAIN IN LESS THAN 45 MINUTES NEAR BENSON.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

JUSKIE


&

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 3:10 PM CDTSevere Thunderstorm WarningMPXDouglas35 min
Aug 19, 3:44 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope61 min
Aug 19, 4:00 PM CDTSevere Thunderstorm WarningMPXTodd50 min
Aug 19, 4:08 PM CDTSevere Thunderstorm WarningMPXMorrison47 min
Aug 19, 5:34 PM CDTTornado WarningMPXMorrison31 min
Aug 19, 5:42 PM CDTFlash Flood WarningMPXPope, Stevens2 hr
Aug 19, 5:58 PM CDTTornado WarningMPXStearns32 min
Aug 19, 6:30 PM CDTSevere Thunderstorm WarningMPXStearns65 min
Aug 19, 6:44 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Swift61 min
Aug 19, 6:58 PM CDTTornado WarningMPXStearns47 min

Nearby

Flash Flood Warnings in Minnesota, 1998Every flash flood warning in 1998

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.