Alert archive / Michigan / Flash Flood Warnings in 2021

Flash Flood Warning 1, NWS Gaylord, MI

July 24, 2021Leelanau County, Michigan

NWS Gaylord, MI issued this flash flood warning at Jul 24, 2021, 8:59 AM EDT for Leelanau County, Michigan. It was in force for 3 hr. 2 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: Jul 24, 2021, 8:59 AM EDT (12:59 UTC)
Expired: Jul 24, 2021, 12:00 PM EDT
In force: 3 hr
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Flood severity: None

County Leelanau County, MI

The radar

The NCL Michigan radar (KAPX), 85 km from the middle of the area, began a volume at 12:59 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 24, 9:19 AM EDT	HEAVY RAIN 3.54	1 S Suttons Bay, MI	MESONET STATION FW9533 SUTTONS BAY.
Jul 24, 10:10 AM EDT	HEAVY RAIN 3.89	1 S Suttons Bay, MI	24 HOUR TOTAL. MESONET STATION FW9533 SUTTONS BAY.

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 12:00Z, 1.0 hours before the alert went out and 192 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: 604 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1043 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

389 
WGUS53 KAPX 241259
FFWAPX
MIC089-241600-
/O.NEW.KAPX.FF.W.0001.210724T1259Z-210724T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Gaylord MI
859 AM EDT Sat Jul 24 2021

The National Weather Service in Gaylord has issued a

* Flash Flood Warning for...
  Leelanau County in northern Michigan...

* Until noon EDT.

* At 859 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3.5 inches of 
  rain have fallen. Additional rainfall amounts of 0.5 to 1.5 inches 
  are possible in the warned area. 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...
  Leland, Empire, Sleeping Bear Point, Grand Traverse Light, 
  Bingham, Glen Arbor, Suttons Bay, Northport, Cedar, Lake Leelanau, 
  Fouch, Peshawbestown, Maple City, Greilickville, Omena, 
  Burdickville, Glen Haven, Leelanau State Park and Good Harbor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4479 8609 4490 8608 4500 8592 4498 8584
      4502 8583 4507 8579 4510 8573 4516 8570
      4520 8564 4523 8550 4521 8549 4479 8561

FLASH FLOOD...RADAR INDICATED

$$

Cornish

2 follow-up statements

380 
WGUS73 KAPX 241402
FFSAPX

Flash Flood Statement
National Weather Service Gaylord MI
1002 AM EDT Sat Jul 24 2021

MIC089-241600-
/O.CON.KAPX.FF.W.0001.000000T0000Z-210724T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Leelanau MI-
1002 AM EDT Sat Jul 24 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT TODAY FOR 
LEELANAU COUNTY...

At 1002 AM EDT, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area. Between 2.5 and 5 inches of rain 
have fallen. Additional rainfall amounts of 0.5 to 1 inch are 
possible in the warned area. 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...
  Leland, Empire, Sleeping Bear Point, Grand Traverse Light, 
  Bingham, Glen Arbor, Suttons Bay, Northport, Cedar, Lake Leelanau, 
  Fouch, Peshawbestown, Maple City, Greilickville, Omena, 
  Burdickville, Glen Haven, Leelanau State Park and Good Harbor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4479 8609 4490 8608 4500 8592 4498 8584
      4502 8583 4507 8579 4510 8573 4516 8570
      4520 8564 4523 8550 4521 8549 4479 8561

FLASH FLOOD...RADAR INDICATED

$$

Cornish

541 
WGUS73 KAPX 241521
FFSAPX

Flash Flood Statement
National Weather Service Gaylord MI
1121 AM EDT Sat Jul 24 2021

MIC089-241600-
/O.CON.KAPX.FF.W.0001.000000T0000Z-210724T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Leelanau MI-
1121 AM EDT Sat Jul 24 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT TODAY FOR 
LEELANAU COUNTY...

At 1121 AM EDT, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area. Between 3 and 5.5 inches of rain 
have fallen. Additional rainfall amounts up to 0.5 inches are 
possible in the warned area. 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...
  Leland, Empire, Sleeping Bear Point, Grand Traverse Light, 
  Bingham, Glen Arbor, Suttons Bay, Northport, Cedar, Lake Leelanau, 
  Fouch, Peshawbestown, Maple City, Greilickville, Omena, 
  Burdickville, Glen Haven, Leelanau State Park and Good Harbor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4479 8609 4490 8608 4500 8592 4498 8584
      4502 8583 4507 8579 4510 8573 4516 8570
      4520 8564 4523 8550 4521 8549 4479 8561

FLASH FLOOD...RADAR INDICATED

$$

Cornish

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 3:08 AM EDT	Small Craft Advisory	APX		16 hr
Jul 24, 8:17 AM EDT	Special Weather Statement	APX	Leelanau	58 min
Jul 24, 9:17 AM EDT	Flash Flood Warning	APX	Grand Traverse, Leelanau	3 hr
Jul 24, 9:28 AM EDT	Special Weather Statement	APX	Kalkaska	32 min
Jul 24, 9:33 AM EDT	Flash Flood Warning	APX	Antrim, Grand Traverse, Kalkaska	3 hr
Jul 24, 12:52 PM EDT	Special Weather Statement	APX	Missaukee, Roscommon	38 min
Jul 24, 1:11 PM EDT	Special Weather Statement	APX	Roscommon	34 min
Jul 24, 1:33 PM EDT	Special Weather Statement	APX	Gladwin, Ogemaw, Roscommon	27 min
Jul 24, 1:53 PM EDT	Special Weather Statement	APX	Ogemaw	37 min
Jul 24, 2:09 PM EDT	Special Marine Warning	APX		66 min
Jul 24, 2:29 PM EDT	Special Weather Statement	APX	Arenac	46 min
Jul 24, 3:16 PM EDT	Severe Thunderstorm Warning	APX	Arenac	29 min
Jul 24, 3:21 PM EDT	Severe Thunderstorm Warning	APX	Gladwin	54 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.