Alert archive / Michigan / Flash Flood Warnings in 2020

Flash Flood Warning 8, NWS Gaylord, MI

July 18, 2020Cheboygan County, Emmet County, Michigan

NWS Gaylord, MI issued this flash flood warning at Jul 18, 2020, 4:18 PM EDT for Cheboygan County, Emmet County, Michigan. It was in force for 107 min. 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 18, 2020, 4:18 PM EDT (20:18 UTC)
Expired
Jul 18, 2020, 6:05 PM EDT
In force
107 min
Issued by
NWS Gaylord, MI
Area
Storm-based polygon
Flood severity
None

Counties Cheboygan County, MI, Emmet County, MI

The radar

The NCL Michigan radar (KAPX), 65 km from the middle of the area, began a volume at 20:18 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

TimeReportWhereRemark
Jul 18, 5:15 PM EDTHEAVY RAIN 1.193 S Indian River, MI6-HOUR RAINFALL TOTAL THROUGH 5 PM.
Jul 18, 5:30 PM EDTFLASH FLOOD1 E Oden, MISOCIAL MEDIA PICTURES SHOWING KNEE-HIGH WATER FLOODING HOMES ALONG PINGREE AVE.

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 12:00Z, 8.3 hours before the alert went out and 189 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-pSkew-T log-p diagram, Alpena, MI at 12:00Z on 2020-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 71 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Alpena, MI at 12:00Z on 2020-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
71 J/kg
Mixed-layer CIN
-221 J/kg
Mixed-layer LCL
985 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

078 
WGUS53 KAPX 182018
FFWAPX
MIC031-047-182315-
/O.NEW.KAPX.FF.W.0008.200718T2018Z-200718T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Gaylord MI
418 PM EDT Sat Jul 18 2020

The National Weather Service in Gaylord has issued a

* Flash Flood Warning for...
  Central Cheboygan County in northern Michigan...
  Southern Emmet County in northern Michigan...

* Until 715 PM EDT.

* At 418 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Radar rainfall estimates have 
  been around 2 inches per hour. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  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 flash flooding include...
  Petoskey, Cheboygan, Harbor Springs, Pellston, Indian River, 
  Conway, Aloha, Alanson, Topinabee, Burt Lake State Park, Burt 
  Lake, Brutus, Mullet Lake, Aloha State Park, Reasoners Corner, 
  Koehler Township, Oden, Alverno, Cheboygan State Park and Petoskey 
  State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

&&

LAT...LON 4551 8510 4565 8458 4567 8442 4563 8421
      4562 8425 4538 8425 4532 8480 4534 8507
      4537 8507 4540 8494 4544 8509

FLASH FLOOD...RADAR INDICATED

$$

APX
3 follow-up statements
540 
WGUS73 KAPX 182104
FFSAPX

Flash Flood Statement
National Weather Service Gaylord MI
504 PM EDT Sat Jul 18 2020

MIC031-047-182315-
/O.CON.KAPX.FF.W.0008.000000T0000Z-200718T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cheboygan MI-Emmet MI-
504 PM EDT Sat Jul 18 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM EDT THIS 
EVENING FOR CENTRAL CHEBOYGAN AND SOUTHERN EMMET COUNTIES...

At 504 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Flash flooding is ongoing or expected 
to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar.

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 flash flooding include...
  Petoskey, Harbor Springs, Indian River, Conway, Aloha, Alanson, 
  Topinabee, Burt Lake State Park, Burt Lake, Koehler Township, 
  Aloha State Park, Reasoners Corner, Oden, Black Lake, Petoskey 
  State Park and Bay View.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

&&

LAT...LON 4537 8507 4540 8494 4545 8504 4545 8480
      4550 8456 4558 8434 4562 8425 4561 8425
      4560 8425 4559 8425 4557 8425 4556 8425
      4555 8425 4553 8425 4538 8425 4532 8480
      4534 8507

FLASH FLOOD...RADAR INDICATED

$$

APX
411 
WGUS73 KAPX 182146
FFSAPX

Flash Flood Statement
National Weather Service Gaylord MI
546 PM EDT Sat Jul 18 2020

MIC047-182156-
/O.CAN.KAPX.FF.W.0008.000000T0000Z-200718T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Emmet MI-
546 PM EDT Sat Jul 18 2020

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN EMMET COUNTY...

Flooding is no longer expected to pose a threat. Please continue to 
heed any remaining road closures.

LAT...LON 4546 8470 4550 8456 4553 8436 4555 8425
      4553 8425 4538 8425 4534 8469 4540 8471
      4544 8471

$$

MIC031-182315-
/O.CON.KAPX.FF.W.0008.000000T0000Z-200718T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cheboygan MI-
546 PM EDT Sat Jul 18 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM EDT THIS 
EVENING FOR CENTRAL CHEBOYGAN COUNTY...

At 546 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Flash flooding is ongoing or expected 
to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar.

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 flash flooding include...
  Indian River, Koehler Township, Aloha State Park, Topinabee, Burt 
  Lake State Park and Black Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

&&

LAT...LON 4546 8470 4550 8456 4553 8436 4555 8425
      4553 8425 4538 8425 4534 8469 4540 8471
      4544 8471

FLASH FLOOD...RADAR INDICATED

$$

APX
765 
WGUS73 KAPX 182205
FFSAPX

Flash Flood Statement
National Weather Service Gaylord MI
605 PM EDT Sat Jul 18 2020

MIC031-182215-
/O.CAN.KAPX.FF.W.0008.000000T0000Z-200718T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cheboygan MI-
605 PM EDT Sat Jul 18 2020

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL CHEBOYGAN COUNTY...

Storms are moving off to the east and the heavy rain has ended. 
Flooding is no longer expected to pose a threat. Please continue to 
heed any remaining road closures.

LAT...LON 4546 8470 4550 8456 4553 8436 4555 8425
      4553 8425 4538 8425 4534 8469 4540 8471
      4544 8471

$$

APX

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 10:39 PM EDTSmall Craft AdvisoryAPX24 hr
Jul 18, 3:34 AM EDTBeach Hazards StatementAPXBenzie, Charlevoix, Emmet, Leelanau, Mackinac, Manistee17 hr
Jul 18, 8:34 AM EDTSpecial Weather StatementAPXCharlevoix, Mackinac41 min
Jul 18, 8:47 AM EDTSpecial Marine WarningAPX58 min
Jul 18, 9:20 AM EDTSpecial Weather StatementAPXCharlevoix, Mackinac55 min
Jul 18, 9:45 AM EDTSpecial Weather StatementAPXAntrim, Emmet, Grand Traverse, Mackinac60 min
Jul 18, 9:46 AM EDTSpecial Marine WarningAPX29 min
Jul 18, 10:13 AM EDTSpecial Marine WarningAPX62 min
Jul 18, 10:20 AM EDTSevere Thunderstorm WarningAPXCheboygan, Emmet38 min
Jul 18, 10:26 AM EDTSevere Thunderstorm WarningAPXAntrim49 min
Jul 18, 10:40 AM EDTSevere Thunderstorm WarningAPXCharlevoix, Cheboygan, Montmorency, Otsego40 min
Jul 18, 10:55 AM EDTSevere Thunderstorm WarningAPXAntrim, Kalkaska50 min
Jul 18, 10:56 AM EDTSpecial Marine WarningAPX94 min
Jul 18, 11:08 AM EDTSevere Thunderstorm WarningAPXCrawford, Kalkaska, Otsego52 min
Jul 18, 11:25 AM EDTFlash Flood WarningAPXGrand Traverse57 min
Jul 18, 12:15 PM EDTSevere Thunderstorm WarningAPXAlpena30 min
Jul 18, 12:18 PM EDTSpecial Marine WarningAPX57 min
Jul 18, 12:30 PM EDTSevere Thunderstorm WarningAPXAlcona, Oscoda60 min
Jul 18, 1:09 PM EDTSpecial Marine WarningAPX96 min
Jul 18, 1:18 PM EDTSevere Thunderstorm WarningAPXAlcona42 min
Jul 18, 4:04 PM EDTTornado WarningAPXCheboygan, Emmet41 min
Jul 18, 4:31 PM EDTSpecial Marine WarningAPX29 min
Jul 18, 4:31 PM EDTSevere Thunderstorm WarningAPXCharlevoix, Emmet44 min
Jul 18, 4:34 PM EDTSpecial Marine WarningAPX56 min
Jul 18, 4:35 PM EDTSevere Thunderstorm WarningAPXCheboygan, Presque Isle40 min
Jul 18, 4:49 PM EDTSevere Thunderstorm WarningAPXCheboygan41 min
Jul 18, 5:04 PM EDTSevere Thunderstorm WarningAPXCheboygan, Presque Isle56 min
Jul 18, 5:12 PM EDTSevere Thunderstorm WarningAPXCheboygan, Presque Isle48 min
Jul 18, 5:20 PM EDTSpecial Marine WarningAPX85 min
Jul 18, 6:02 PM EDTSpecial Marine WarningAPX43 min
Jul 18, 6:04 PM EDTSevere Thunderstorm WarningAPXCheboygan, Presque Isle56 min
Jul 18, 6:46 PM EDTSpecial Marine WarningAPX79 min

Nearby

Flash Flood Warnings in Michigan, 2020Every flash flood warning in 2020

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.