Alert archive / Michigan / Flash Flood Warnings in 2013

Flash Flood Warning 2, NWS Gaylord, MI

September 9, 2013Chippewa County, Michigan

NWS Gaylord, MI issued this flash flood warning at Sep 9, 2013, 11:47 PM EDT for Chippewa County, Michigan. It was in force for 6 hr. 4 reports 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: Sep 9, 2013, 11:47 PM EDT (03:47 UTC)
Expired: Sep 10, 2013, 5:30 AM EDT
In force: 6 hr
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Flood severity: None

County Chippewa County, MI

The radar

The NCL Michigan radar (KAPX), 180 km from the middle of the area, began a volume at 03:49 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
Sep 10, 12:30 AM EDT	HEAVY RAIN 0	Sugar Island, MI	RADAR ESTIMATED MORE THAN 5 INCHES OF RAIN FELL ACROSS SUGAR ISLAND WITH A NUMBER OF ROAD WASHOUTS.
Sep 10, 3:12 AM EDT	FLASH FLOOD	7 E Sault Ste. Marie, MI	1 1/2 MILE ROAD WAS WASHED OUT.
Sep 10, 3:15 AM EDT	FLASH FLOOD	Sugar Island, MI	RADAR ESTIMATED MORE THAN 5 INCHES OF RAIN FELL ACROSS SUGAR ISLAND WITH A NUMBER OF ROAD WASHOUTS.
Sep 10, 3:16 AM EDT	FLASH FLOOD	6 Ese Sault Ste. Marie, MI	WESTSHORE DR. WAS WASHED OUT.

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

The nearest sounding before it

Alpena, MI (KAPX), launched 00:00Z, 3.8 hours before the alert went out and 211 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: 196 J/kg
Mixed-layer CIN: -312 J/kg
Mixed-layer LCL: 994 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 291 m²/s²
0-3 km storm-relative helicity: 448 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

206 
WGUS53 KAPX 100347
FFWAPX
MIC033-100930-
/O.NEW.KAPX.FF.W.0002.130910T0347Z-130910T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
1147 PM EDT MON SEP 9 2013

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHIPPEWA COUNTY IN EASTERN UPPER MICHIGAN...

* UNTIL 530 AM EDT

* AT 1143 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR 
  INDICATED SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAINFALL 
  REPEATEDLY MOVING ACROSS CENTRAL AND NORTHERN SUGAR ISLAND...AND 
  ADJOINING PORTIONS OF MAINLAND CHIPPEWA COUNTY. RADAR ESTIMATED THAT
  UP TO 3.5 INCHES OF RAIN HAD FALLEN OVER THE NORTH HALF OF SUGAR 
  ISLAND. AN ADDITIONAL ONE TO TWO INCHES OF RAIN IS POSSIBLE 
  OVERNIGHT. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO   
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...THE 
  EAST SIDE OF SAULT STE MARIE...AND THE NORTH HALF OF SUGAR 
  ISLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO 
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO 
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN 
WATER BEGINS RISING.

&&

LAT...LON 4653 8418 4654 8413 4651 8411 4650 8413
      4647 8414 4645 8417 4643 8418 4639 8416
      4644 8434 4650 8439 4651 8434 4650 8429
      4654 8421

$$





JZ

2 follow-up statements

554 
WGUS73 KAPX 100450
FFSAPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
1250 AM EDT TUE SEP 10 2013

MIC033-100930-
/O.CON.KAPX.FF.W.0002.000000T0000Z-130910T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHIPPEWA MI-
1250 AM EDT TUE SEP 10 2013

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CHIPPEWA COUNTY UNTIL 
530 AM EDT...

AT 1247 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
INDICATED SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAINFALL   
REPEATEDLY MOVING ACROSS CENTRAL AND NORTHERN SUGAR ISLAND...AND   
ADJOINING PORTIONS OF MAINLAND CHIPPEWA COUNTY. RADAR ESTIMATED THAT 
UP TO 4 INCHES OF RAIN HAD FALLEN OVER THE NORTH HALF OF SUGAR   
ISLAND. AN ADDITIONAL INCH TO INCH AND A HALF OF RAIN IS POSSIBLE   
OVERNIGHT. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO 
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...THE 
EAST SIDE OF SAULT STE MARIE...AND THE NORTH HALF OF SUGAR ISLAND. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4653 8418 4654 8413 4651 8411 4650 8413
      4647 8414 4645 8417 4643 8418 4639 8416
      4644 8434 4650 8439 4651 8434 4650 8429
      4654 8421

$$



JZ

235 
WGUS73 KAPX 100711
FFSAPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
311 AM EDT TUE SEP 10 2013

MIC033-100930-
/O.CON.KAPX.FF.W.0002.000000T0000Z-130910T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHIPPEWA MI-
311 AM EDT TUE SEP 10 2013

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL CHIPPEWA COUNTY
UNTIL 530 AM EDT...

AT 308 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
FLASH FLOODING WAS OCCURRING ON SUGAR ISLAND AND IN SAULT STE. MARIE 
AND VICINITY.

CHIPPEWA COUNTY DISPATCH REPORTED THAT 1 1/2 MILE ROAD AND WEST 
SHORE ROAD BOTH HAD WASH OUTS FROM THE EXCESSIVE RAINFALL FROM 
EARLIER THIS EVENING. THERE WERE ALSO STREETS THAT WERE FLOODED IN 
THE CITY OF SAULT STE. MARIE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4653 8418 4654 8413 4651 8411 4650 8413
      4647 8414 4645 8417 4643 8418 4639 8416
      4644 8434 4650 8439 4651 8434 4650 8429
      4654 8421

$$

The office that day

Everything else NWS Gaylord, MI issued on the same UTC day.

Issued	Product	Office	Lasted
Sep 10, 12:00 AM EDT	Special Marine Warning	APX	60 min
Sep 10, 12:56 AM EDT	Special Marine Warning	APX	34 min
Sep 10, 6:35 PM EDT	Special Marine Warning	APX	70 min

Nearby

Flash Flood Warnings in Michigan, 2013 Every flash flood warning in 2013

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.