Alert archive / Minnesota / Flash Flood Warnings in 2017

Flash Flood Warning 3, NWS Twin Cities, MN

July 6, 2017Kanabec County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Jul 6, 2017, 3:27 AM CDT for Kanabec 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 6, 2017, 3:27 AM CDT (08:27 UTC)
Expired: Jul 6, 2017, 6:30 AM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

County Kanabec County, MN

The radar

The Duluth radar (KDLH), 118 km from the middle of the area, began a volume at 08:29 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, 8.5 hours before the alert went out and 133 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2692 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 1493 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

As transmitted.

473 
WGUS53 KMPX 060827
FFWMPX
MNC065-061130-
/O.NEW.KMPX.FF.W.0003.170706T0827Z-170706T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
327 AM CDT THU JUL 6 2017

The National Weather Service in The Twin Cities has issued a

* Flash Flood Warning for...
  Northeastern Kanabec County in east central Minnesota...

* Until 630 AM CDT

* At 326 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to four inches of rain have 
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Quamba, Knife Lake and Warman. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4598 9306 4598 9314 4590 9314 4591 9333
      4616 9337 4616 9306

$$

SPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 1:28 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	32 min
Jul 6, 1:59 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	31 min
Jul 6, 2:28 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	62 min
Jul 6, 2:43 AM CDT	Special Weather Statement	MPX	Douglas	32 min
Jul 6, 3:20 AM CDT	Special Weather Statement	MPX	Kanabec	3 hr
Jul 6, 3:38 AM CDT	Special Weather Statement	MPX	Todd	67 min
Jul 6, 3:48 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	57 min
Jul 6, 4:26 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	11 min
Jul 6, 4:34 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Kanabec, Mille Lacs, Morrison	26 min
Jul 6, 4:47 AM CDT	Special Weather Statement	MPX	Benton, Sherburne, Stearns	28 min
Jul 6, 5:37 AM CDT	Severe Thunderstorm Warning	MPX	Chisago	38 min

Nearby

Flash Flood Warnings in Minnesota, 2017 Every flash flood warning 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.