Alert archive / Minnesota / Flash Flood Warnings in 2007

Flash Flood Warning 23, NWS Twin Cities, MN

August 19, 2007Watonwan County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Aug 19, 2007, 3:04 AM CDT for Watonwan County, Minnesota. It was in force for 6 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, 2007, 3:04 AM CDT (08:04 UTC)
Expired
Aug 19, 2007, 9:00 AM CDT
In force
6 hr
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 08:07 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 00:00Z, 8.1 hours before the alert went out and 126 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 2007-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2007-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 232 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
232 m²/s²
0-3 km storm-relative helicity
510 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KMPX 190807
FFWMPX
MNC165-191400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
304 AM CDT SUN AUG 19 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WATONWAN COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 845 AM CDT

* AT 304 AM CDT...RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY
  RAIN ACROSS MUCH OF THE WARNED AREA. THE STORMS PRODUCING THE
  HEAVIEST RAIN WERE OVER GROGAN...OR ABOUT 5 MILES NORTHEAST OF 
  ST JAMES. THESE STORMS WERE MOVING SLOWLY SOUTH SOUTHEAST. RAINFALL 
  RATES REMAIN HIGH...1 TO 2 INCHES AN HOUR...IN THE LINE OF STORMS. 
  ANY ADDITIONAL RAIN WILL RAPIDLY RUNOFF...BECAUSE OF THE SATURATED 
  GROUND CAUSED BY THE 3 TO 5 INCHES OF RAIN THAT HAS ALREADY FALLEN...
  OVER THE LAST 18 HOURS. 

* SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...BUTTERFIELD...MADELIA
  AND ST JAMES.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE
INTO AREAS WHERE THE WATER COVERS THE ROAD. JUST ONE FOOT OF RUSHING
WATER CAN SWEEP MOST VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

LAT...LON 4410 9484 4385 9480 4386 9438 4411 9439

$$

DWE
1 follow-up statement
000 
WGUS73 KMPX 191315
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
814 AM CDT SUN AUG 19 2007

MNC165-191324-
WATONWAN MN-
814 AM CDT SUN AUG 19 2007

...THE FLASH FLOOD WARNING FOR WATONWAN COUNTY HAS BEEN CANCELLED...

RADAR INDICATED THAT RAINFALL WAS ENDING ACROSS THE WARNED AREA...
AND THE FLOOD THREAT WAS DIMINISHING.

THEREFORE...THE FLASH FLOOD WARNING FOR WATONWAN COUNTY HAS 
BEEN CANCELLED.


LAT...LON 4410 9484 4385 9480 4386 9438 4411 9439

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 10:00 PM CDTFlash Flood WarningMPXGoodhue6 hr
Aug 18, 10:50 PM CDTFlash Flood WarningMPXLe Sueur, Nicollet, Rice, Sibley6 hr
Aug 19, 12:50 AM CDTFlash Flood WarningMPXSteele, Waseca4 hr
Aug 19, 12:50 AM CDTFlash Flood WarningMPXBlue Earth, Steele, Waseca4 hr
Aug 19, 1:18 AM CDTFlash Flood WarningMPXBrown, Redwood, Renville6 hr
Aug 19, 2:48 AM CDTFlash Flood WarningMPXFaribault, Freeborn6 hr
Aug 19, 8:53 AM CDTFlash Flood WatchMPXBlue Earth, Brown, Faribault, Freeborn, Goodhue, Le Sueur and 9 more16 hr
Aug 19, 12:04 PM CDTFlash Flood WarningMPXWatonwan3 hr
Aug 19, 2:48 PM CDTFlash Flood WarningMPXWatonwan3 hr
Aug 19, 6:20 PM CDTFlash Flood WarningMPXFaribault115 min

Nearby

Flash Flood Warnings in Minnesota, 2007Every flash flood warning in 2007

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.