Alert archive / Minnesota / Flash Flood Warnings in 2023

Flash Flood Warning 3, NWS Twin Cities, MN

July 27, 2023Kanabec County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Jul 27, 2023, 6:39 PM CDT for Kanabec County, Minnesota. It was in force for 4 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 27, 2023, 6:39 PM CDT (23:39 UTC)
Expired: Jul 27, 2023, 10:15 PM CDT
In force: 4 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

County Kanabec County, MN

The radar

The Duluth radar (KDLH), 119 km from the middle of the area, began a volume at 23:41 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.

What was reported inside it

Time	Report	Where	Remark
Jul 27, 7:06 PM CDT	RAIN 1.84	6 N Quamba, MN	Mesonet station FW8346 Brook Park.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.7 hours before the alert went out and 134 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: 3159 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1365 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

948 
WGUS53 KMPX 272339
FFWMPX
MNC065-280330-
/O.NEW.KMPX.FF.W.0003.230727T2339Z-230728T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
639 PM CDT Thu Jul 27 2023

The National Weather Service in the Twin Cities has issued a

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

* Until 1030 PM CDT.

* At 639 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4.5 inches of 
  rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 
  hour. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Knife Lake, Snake River State Forest and Warman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4594 9314 4598 9331 4603 9326 4607 9343
      4615 9343 4616 9305 4598 9306 4598 9314

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

Borghoff

2 follow-up statements

260 
WGUS73 KMPX 280134
FFSMPX

Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
834 PM CDT Thu Jul 27 2023

MNC065-280330-
/O.CON.KMPX.FF.W.0003.000000T0000Z-230728T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kanabec MN-
834 PM CDT Thu Jul 27 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT THIS 
EVENING FOR NORTHERN KANABEC COUNTY...

At 834 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 3 and 5 inches of rain have 
fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Knife Lake, Snake River State Forest and Warman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4594 9314 4598 9331 4603 9326 4607 9343
      4615 9343 4616 9305 4598 9306 4598 9314

FLASH FLOOD...RADAR INDICATED

$$

Borghoff

109 
WGUS73 KMPX 280315
FFSMPX

Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
1015 PM CDT Thu Jul 27 2023

MNC065-280325-
/O.CAN.KMPX.FF.W.0003.000000T0000Z-230728T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kanabec MN-
1015 PM CDT Thu Jul 27 2023

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHERN KANABEC COUNTY...

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

LAT...LON 4594 9314 4598 9331 4603 9326 4607 9343
      4615 9343 4616 9305 4598 9306 4598 9314

$$

Borghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 5:31 AM CDT	Special Weather Statement	MPX	Isanti	29 min
Jul 27, 6:09 AM CDT	Special Weather Statement	MPX	Chisago	36 min
Jul 27, 6:28 AM CDT	Severe Thunderstorm Warning	MPX	Chisago	32 min
Jul 27, 6:57 AM CDT	Severe Thunderstorm Warning	MPX	Chisago	33 min
Jul 27, 9:04 AM CDT	Heat Advisory	MPX	Watonwan	3 hr
Jul 27, 2:41 PM CDT	Special Weather Statement	MPX	Mille Lacs	49 min
Jul 27, 2:49 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MPX	Kanabec, Mille Lacs	41 min
Jul 27, 3:33 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MPX	Chisago	42 min
Jul 27, 3:48 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	28 min
Jul 27, 3:57 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MPX	Kanabec	33 min
Jul 27, 4:13 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MPX	Chisago	47 min
Jul 27, 4:29 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	46 min
Jul 27, 4:52 PM CDT	Special Weather Statement	MPX	Brown	38 min
Jul 27, 5:05 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	25 min
Jul 27, 5:25 PM CDT	Special Weather Statement	MPX	Renville	35 min
Jul 27, 5:54 PM CDT	Special Weather Statement	MPX	Kanabec	66 min
Jul 27, 6:05 PM CDT	Special Weather Statement	MPX	Renville	25 min
Jul 27, 6:35 PM CDT	Special Weather Statement	MPX	McLeod	40 min
Jul 27, 6:36 PM CDT	Special Weather Statement	MPX	Renville	39 min
Jul 27, 6:42 PM CDT	Severe Thunderstorm Warning	MPX	Renville	48 min

Nearby

Flash Flood Warnings in Minnesota, 2023 Every flash flood warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.