Alert archive / Michigan / Beach Hazards Statements in 2021
Beach Hazards Statement 5, NWS Detroit, MI
NWS Detroit, MI issued this beach hazards statement at Jul 21, 2021, 2:54 AM EDT for Huron County, Saint Clair County, Sanilac County, Michigan. It took effect at Jul 21, 2021, 10:00 AM EDT. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Jul 21, 2021, 2:54 AM EDT (06:54 UTC)
- In effect from
- Jul 21, 2021, 10:00 AM EDT
- Expired
- Jul 21, 2021, 8:00 PM EDT
- In force
- 10 hr
- Issued by
- NWS Detroit, MI
Counties Huron County, MI, Saint Clair County, MI, Sanilac County, MI
The radar
The Detroit radar (KDTX), 101 km from the middle of the area, began a volume at 06:59 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.
The nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 6.9 hours before the alert went out and 98 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.
- Mixed-layer CAPE
- 334 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 864 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -125 m²/s²
- 0-3 km storm-relative helicity
- -74 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.2
The text
As transmitted.
186 WHUS43 KDTX 210654 CFWDTX Coastal Hazard Message National Weather Service Detroit/Pontiac MI 254 AM EDT Wed Jul 21 2021 MIZ049-055-063-212000- /O.NEW.KDTX.BH.S.0005.210721T1400Z-210721T2000Z/ Huron-Sanilac-St. Clair- 254 AM EDT Wed Jul 21 2021 ...BEACH HAZARDS STATEMENT IN EFFECT FROM 10 AM EDT THIS MORNING THROUGH THIS AFTERNOON... * WHAT...Dangerous swimming conditions expected. * WHERE...Huron, Sanilac and St. Clair Counties. * WHEN...From 10 AM EDT this morning through this afternoon. * IMPACTS...Strong currents can pull swimmers into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$ KK
1 follow-up statement
238 WHUS43 KDTX 211342 AAA CFWDTX Coastal Hazard Message...UPDATED National Weather Service Detroit/Pontiac MI 942 AM EDT Wed Jul 21 2021 MIZ049-055-063-220000- /O.EXT.KDTX.BH.S.0005.210721T1400Z-210722T0000Z/ Huron-Sanilac-St. Clair- 942 AM EDT Wed Jul 21 2021 ...BEACH HAZARDS STATEMENT NOW IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Dangerous swimming conditions expected. * WHERE...Huron, Sanilac and St. Clair Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Strong currents can pull swimmers into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 8:06 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw | 54 min |
| Jul 20, 8:31 PM EDT | Special Weather Statement | DTX | Lenawee, Monroe | 89 min |
| Jul 20, 8:58 PM EDT | Special Weather Statement | DTX | Lenawee | 62 min |
Nearby
Beach Hazards Statements in Michigan, 2021Every beach hazards statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.