Alert archive / Minnesota / Flash Flood Warnings in 2019

Flash Flood Warning 16, NWS Twin Cities, MN

July 15, 2019Scott County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Jul 15, 2019, 7:54 PM CDT for Scott 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 outline as issued.

The facts

Issued
Jul 15, 2019, 7:54 PM CDT (00:54 UTC)
Expired
Jul 15, 2019, 11:00 PM CDT
In force
3 hr
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Flood severity
None

County Scott County, MN

The radar

The Minneapolis radar (KMPX), 25 km from the middle of the area, began a volume at 00:54 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

Aberdeen, SD (KABR), launched 00:00Z, 0.9 hours before the alert went out and 385 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, Aberdeen, SD at 00:00Z on 2019-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 138 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, Aberdeen, SD at 00:00Z on 2019-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
138 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
2352 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
23 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted.

014 
WGUS53 KMPX 160054
FFWMPX
MNC139-160400-
/O.NEW.KMPX.FF.W.0016.190716T0054Z-190716T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
754 PM CDT Mon Jul 15 2019

The National Weather Service in The Twin Cities has issued a

* Flash Flood Warning for...
  Southeastern Scott County in east central Minnesota...

* Until 1100 PM CDT.

* At 752 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Lakeville, New Prague, Jordan, Elko New Market, Helena, Mn Valley
  State Rec Area and St Benedict.

Additional rainfall amounts of 1 inch are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 4465 9373 4467 9370 4468 9356 4464 9332
      4463 9328 4455 9328 4455 9368

$$

CTG
1 follow-up statement
795 
WGUS73 KMPX 160351
FFSMPX

Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
1051 PM CDT Mon Jul 15 2019

MNC139-160401-
/O.EXP.KMPX.FF.W.0016.000000T0000Z-190716T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Scott MN-
1051 PM CDT Mon Jul 15 2019

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SCOTT COUNTY WILL EXPIRE
AT 1100 PM CDT...

The heavy rain has ended...and flooding is no longer expected to pose
a threat. Please continue to heed any remaining road closures.

LAT...LON 4465 9373 4467 9370 4468 9356 4464 9332
      4463 9328 4455 9328 4455 9368

$$

JPC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 7:08 PM CDTFlash Flood WarningMPXHennepin3 hr
Jul 15, 7:24 PM CDTFlash Flood WarningMPXDakota, Hennepin, Ramsey3 hr
Jul 15, 7:31 PM CDTSpecial Weather StatementMPXGoodhue59 min
Jul 15, 7:42 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice48 min
Jul 15, 7:49 PM CDTSpecial Weather StatementMPXBlue Earth, Rice, Waseca41 min
Jul 15, 8:33 PM CDTSpecial Weather StatementMPXGoodhue27 min
Jul 15, 8:35 PM CDTSpecial Weather StatementMPXSteele, Waseca55 min
Jul 15, 9:01 PM CDTSpecial Weather StatementMPXBlue Earth, Rice29 min
Jul 15, 9:10 PM CDTTornado WarningMPXBlue Earth, Waseca35 min
Jul 15, 9:38 PM CDTSpecial Weather StatementMPXBlue Earth, Waseca52 min
Jul 15, 9:50 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Waseca40 min
Jul 16, 1:53 PM CDTSpecial Weather StatementMPXBlue Earth82 min
Jul 16, 3:52 PM CDTSpecial Weather StatementMPXRamsey83 min
Jul 16, 4:29 PM CDTFlash Flood WarningMPXHennepin, Ramsey2 hr
Jul 16, 4:50 PM CDTSpecial Weather StatementMPXHennepin25 min

Nearby

Flash Flood Warnings in Minnesota, 2019Every flash flood warning in 2019

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.