Alert archive / Minnesota / Flood Watches in 2017

Flood Watch 1, NWS Twin Cities, MN

August 16, 201719 counties in Minnesota

NWS Twin Cities, MN issued this flood watch at Aug 16, 2017, 7:49 PM CDT for 19 counties in Minnesota. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Aug 16, 2017, 7:49 PM CDT (00:49 UTC)
Expired
Aug 17, 2017, 8:01 AM CDT
In force
12 hr
Issued by
NWS Twin Cities, MN
Flood severity
None

Counties Benton County, MN, Chippewa County, MN, Douglas County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wright County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 118 km from the middle of the area, began a volume at 00:53 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, 0.8 hours before the alert went out and 116 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 2017-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 445 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 2017-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 square meters per square second.19395878Sfc1 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
445 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
756 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.6

Open this sounding in Storm Lab

The text

As transmitted.

583 
WGUS63 KMPX 170049
FFAMPX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Twin Cities/Chanhassen MN
749 PM CDT Wed Aug 16 2017

...Flood watch in effect through noon on Thursday...

.Several hours of moderate to heavy rain are expected tonight. A
large area of 4 to 6 inches is expected, with a few locations 
seeing locally higher amounts. This could lead to flooding in low
lying areas, and smaller creeks and streams. Remember, never drive
through water covered roads.

MNZ041>044-047>051-054>059-064>066-073-170900-
/O.NEW.KMPX.FA.A.0001.170817T0049Z-170817T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Douglas-Todd-Morrison-Mille Lacs-Stevens-Pope-Stearns-Benton-
Sherburne-Lac Qui Parle-Swift-Chippewa-Kandiyohi-Meeker-Wright-
Yellow Medicine-Renville-McLeod-Redwood-
Including the cities of Alexandria, Long Prairie, Little Falls, 
Princeton, Morris, Glenwood, St Cloud, Foley, Elk River, Madison,
Benson, Montevideo, Willmar, Litchfield, Monticello, 
Granite Falls, Olivia, Hutchinson, and Redwood Falls
749 PM CDT Wed Aug 16 2017

...FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING...

The National Weather Service in Twin Cities/Chanhassen has issued
a

* Flood Watch for portions of central Minnesota, east central 
  Minnesota, southwest Minnesota, and west central Minnesota, 
  including the following areas, in central Minnesota, Benton, 
  Kandiyohi, McLeod, Meeker, Morrison, Renville, Sherburne, 
  Stearns, Todd, and Wright. In east central Minnesota, Mille 
  Lacs. In southwest Minnesota, Redwood. In west central 
  Minnesota, Chippewa, Douglas, Lac Qui Parle, Pope, Stevens, 
  Swift, and Yellow Medicine. 

* Through Thursday morning

* Heavy rain overnight could lead to flooding.

* Low lying areas and small creeks and streams will be most
  susceptible to flooding. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

&&

$$

jrb
1 follow-up statement
914 
WGUS63 KMPX 171301
FFAMPX

Flood Watch
National Weather Service Twin Cities/Chanhassen MN
801 AM CDT Thu Aug 17 2017

MNZ041>044-047>051-054>059-064>066-073-171415-
/O.CAN.KMPX.FA.A.0001.000000T0000Z-170817T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Douglas-Todd-Morrison-Mille Lacs-Stevens-Pope-Stearns-Benton-
Sherburne-Lac Qui Parle-Swift-Chippewa-Kandiyohi-Meeker-Wright-
Yellow Medicine-Renville-McLeod-Redwood-
Including the cities of Alexandria, Long Prairie, Little Falls, 
Princeton, Morris, Glenwood, St Cloud, Foley, Elk River, Madison,
Benson, Montevideo, Willmar, Litchfield, Monticello, 
Granite Falls, Olivia, Hutchinson, and Redwood Falls
801 AM CDT Thu Aug 17 2017

...FLOOD WATCH IS CANCELLED...

The Flood Watch for portions of central Minnesota, east central
Minnesota, southwest Minnesota, and west central Minnesota has
been cancelled. 

No additional heavy rainfall is expected this morning, with any
water from heavy rain last night expected to recede the rest of
today.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 7:29 PM CDTSpecial Weather StatementMPXCarver, McLeod, Scott61 min
Aug 16, 7:42 PM CDTTornado WarningMPXCarver, Hennepin, Scott20 min
Aug 16, 7:59 PM CDTTornado WarningMPXCarver, McLeod31 min
Aug 16, 8:13 PM CDTFlash Flood WarningMPXCarver, Hennepin, Scott3 hr
Aug 16, 10:42 PM CDTAreal Flood WarningMPXChippewa, Kandiyohi, Lac qui Parle, Redwood, Renville, Swift and 1 more9 hr
Aug 16, 11:57 PM CDTSpecial Weather StatementMPXRenville48 min
Aug 17, 1:03 AM CDTFlash Flood WarningMPXRedwood, Renville4 hr
Aug 17, 1:31 AM CDTSpecial Weather StatementMPXRenville44 min
Aug 17, 2:04 AM CDTHigh Wind WarningMPXBrown, Nicollet, Sibley88 min
Aug 17, 3:32 AM CDTWind AdvisoryMPXBlue Earth, Brown, Carver, Dakota, Goodhue, Le Sueur and 10 more4 hr

Nearby

Flood Watches in Minnesota, 2017Every flood watch in 2017

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.