Alert archive / Minnesota / Flash Flood Warnings in 2019

Flash Flood Warning 15, NWS Twin Cities, MN

July 15, 2019Dakota County, Hennepin County, Ramsey County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Jul 15, 2019, 7:24 PM CDT for Dakota County, Hennepin County, Ramsey 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, 7:24 PM CDT (00:24 UTC)
Expired
Jul 15, 2019, 9:54 PM CDT
In force
3 hr
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Flood severity
None

Counties Dakota County, MN, Hennepin County, MN, Ramsey County, MN

The radar

The Minneapolis radar (KMPX), 33 km from the middle of the area, began a volume at 00:28 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.4 hours before the alert went out and 402 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, Green Bay/Straub, WI at 00:00Z on 2019-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 708 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, Green Bay/Straub, WI at 00:00Z on 2019-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 square meters per square second.1939Sfc1 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
708 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1497 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

As transmitted.

980 
WGUS53 KMPX 160024
FFWMPX
MNC037-053-123-160430-
/O.NEW.KMPX.FF.W.0015.190716T0024Z-190716T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in The Twin Cities has issued a

* Flash Flood Warning for...
  Southeastern Hennepin County in east central Minnesota...
  Northwestern Dakota County in east central Minnesota...
  Southern Ramsey County in east central Minnesota...

* Until 1130 PM CDT.

* At 723 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to one inch of rain has
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Minneapolis, St. Paul, Eagan, Burnsville, Lakeville, Apple Valley,
  Maplewood, Inver Grove Heights, Rosemount, Farmington, South St.
  Paul and West St. Paul.

Additional rainfall amounts of 2 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 4463 9328 4464 9332 4474 9333 4474 9319
      4489 9319 4489 9329 4495 9332 4494 9299
      4489 9299 4489 9302 4478 9302 4477 9299
      4461 9300 4460 9328

$$

CTG
2 follow-up statements
540 
WGUS73 KMPX 160036
FFSMPX

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

MNC037-053-123-160430-
/O.CON.KMPX.FF.W.0015.000000T0000Z-190716T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hennepin MN-Dakota MN-Ramsey MN-
736 PM CDT Mon Jul 15 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT FOR
SOUTHEASTERN HENNEPIN...NORTHWESTERN DAKOTA AND SOUTHERN RAMSEY
COUNTIES...

At 632 PM CDT, trained weather spotters reported thunderstorms 
producing heavy rain in Apple Valley. Up to three inches of rain 
have already fallen. Flash flooding is expected to begin shortly.

Some locations that will experience flooding include...
Minneapolis, St. Paul, Eagan, Burnsville, Lakeville, Apple Valley,
Maplewood, Inver Grove Heights, Rosemount, Farmington, South St. Paul
and West St. Paul.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 4463 9328 4464 9332 4474 9333 4474 9319
      4489 9319 4489 9329 4495 9332 4494 9299
      4489 9299 4489 9302 4478 9302 4477 9299
      4461 9300 4460 9328

$$

CTG
326 
WGUS73 KMPX 160254
FFSMPX

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

MNC037-053-123-160304-
/O.CAN.KMPX.FF.W.0015.000000T0000Z-190716T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hennepin MN-Dakota MN-Ramsey MN-
954 PM CDT Mon Jul 15 2019

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN HENNEPIN...NORTHWESTERN
DAKOTA AND SOUTHERN RAMSEY COUNTIES IS CANCELLED...

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

LAT...LON 4463 9328 4464 9332 4474 9333 4474 9319
      4489 9319 4489 9329 4495 9332 4494 9299
      4489 9299 4489 9302 4478 9302 4477 9299
      4461 9300 4460 9328

$$

CTG

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, 7:31 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, 7:54 PM CDTFlash Flood WarningMPXScott3 hr
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.