Alert archive / Michigan / Flash Flood Warnings in 2021

Flash Flood Warning 6, NWS Gaylord, MI

August 28, 2021Benzie County, Michigan

NWS Gaylord, MI issued this flash flood warning at Aug 28, 2021, 12:51 AM EDT for Benzie County, Michigan. It was in force for 3 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: Aug 28, 2021, 12:51 AM EDT (04:51 UTC)
Expired: Aug 28, 2021, 3:45 AM EDT
In force: 3 hr
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Flood severity: None

County Benzie County, MI

The radar

The NCL Michigan radar (KAPX), 102 km from the middle of the area, began a volume at 04:54 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.

What was reported inside it

Time	Report	Where	Remark
Aug 28, 1:00 AM EDT	HEAVY RAIN 1.95	1 Nne Honor, MI	2-HOUR TOTAL.

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.9 hours before the alert went out and 172 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: 552 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 916 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

250 
WGUS53 KAPX 280451
FFWAPX
MIC019-280745-
/O.NEW.KAPX.FF.W.0006.210828T0451Z-210828T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Gaylord MI
1251 AM EDT Sat Aug 28 2021

The National Weather Service in Gaylord has issued a

* Flash Flood Warning for...
  Southeastern Benzie County in northern Michigan...

* Until 345 AM EDT.

* At 1250 AM EDT, law enforcement reported heavy rain falling across
  the warned area. Up to two inches of rain have already fallen.
  Flash flooding is already occurring.

  HAZARD...Flash flooding caused by heavy rain.

  SOURCE...Law enforcement.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Thompsonville, Beulah, Benzonia, Honor, Bendon and Wallin. 

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 4467 8582 4452 8582 4452 8612 4469 8612

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

STJ

1 follow-up statement

777 
WGUS73 KAPX 280628
FFSAPX

Flash Flood Statement
National Weather Service Gaylord MI
228 AM EDT Sat Aug 28 2021

MIC019-280745-
/O.CON.KAPX.FF.W.0006.000000T0000Z-210828T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benzie MI-
228 AM EDT Sat Aug 28 2021

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM EDT FOR
SOUTHEASTERN BENZIE COUNTY...

At 226 AM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to three inches of rain have already
fallen. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flooding of small creeks and streams, urban areas, 
         highways, streets and underpasses as well as other drainage 
         and low lying areas.

Some locations that will experience flooding include...
Thompsonville, Beulah, Benzonia, Honor, Bendon and Wallin. 

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.

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

&&

LAT...LON 4467 8582 4452 8582 4452 8612 4469 8612

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

$$

STJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 12:49 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Manistee, Wexford	56 min
Aug 28, 1:08 AM EDT	Flash Flood Warning	APX	Grand Traverse	3 hr
Aug 28, 1:40 AM EDT	Special Weather Statement	APX	Crawford, Kalkaska, Missaukee, Roscommon	95 min
Aug 28, 3:42 AM EDT	Severe Thunderstorm Warning	APX	Arenac, Gladwin, Missaukee, Ogemaw, Roscommon	63 min
Aug 28, 4:15 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Kalkaska, Manistee, Missaukee, Wexford	60 min
Aug 28, 2:07 PM EDT	Severe Thunderstorm Warning	APX	Kalkaska	38 min
Aug 28, 2:59 PM EDT	Severe Thunderstorm Warning	APX	Crawford, Ogemaw, Oscoda, Roscommon	46 min
Aug 28, 3:14 PM EDT	Special Marine Warning	APX		89 min
Aug 28, 3:18 PM EDT	Small Craft Advisory	APX		29 hr
Aug 28, 3:26 PM EDT	Beach Hazards Statement	APX	Benzie, Charlevoix, Emmet, Leelanau, Mackinac, Manistee	29 hr
Aug 28, 3:57 PM EDT	Severe Thunderstorm Warning	APX	Presque Isle	33 min
Aug 28, 4:01 PM EDT	Severe Thunderstorm Warning	APX	Alpena, Montmorency	49 min
Aug 28, 4:17 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Iosco, Ogemaw, Oscoda	43 min
Aug 28, 4:30 PM EDT	Special Marine Warning	APX		2 hr
Aug 28, 4:52 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Iosco	56 min
Aug 28, 5:05 PM EDT	Severe Thunderstorm Warning	APX	Arenac, Gladwin, Iosco, Ogemaw	55 min
Aug 28, 5:18 PM EDT	Special Marine Warning	APX		117 min

Nearby

Flash Flood Warnings in Michigan, 2021 Every flash flood warning in 2021

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.