Alert archive / Michigan / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 107, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 13, 2011, 8:18 PM EDT for Macomb County, Saint Clair County, Michigan. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2011, 8:18 PM EDT (00:18 UTC)
- Expired
- Aug 13, 2011, 8:49 PM EDT
- In force
- 31 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Macomb County, MI, Saint Clair County, MI
The radar
The Detroit radar (KDTX), 57 km from the middle of the area, began a volume at 00:18 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 13, 5:28 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.3 hours before the alert went out and 333 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
- 43 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 1765 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Detroit, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 13, 7:27 PM EDT, 51 minutes earlier.
Area forecast discussion, Aug 13, 7:27 PM EDT, 51 minutes before
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</html>Hazardous weather outlook, Aug 13, 4:40 AM EDT, 15 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 440 AM EDT SAT AUG 13 2011 MIZ047>049-053>055-060>063-068>070-075-076-082-083-141000- MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER- ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE- 440 AM EDT SAT AUG 13 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST MICHIGAN. .DAY ONE...TODAY AND TONIGHT THERE IS A GOOD CHANCE OF THUNDERSTORMS THROUGH THIS EVENING...WITH A SLIGHT CHANCE FOR THUNDERSTORMS OVERNIGHT. THERE IS A SLIGHT RISK FOR SEVERE WEATHER..WITH DAMAGING WIND GUSTS TO 60 MPH AND LARGE HAIL TO ONE INCH IN DIAMETER THE MAIN THREATS. STORM MOTION WILL BE FROM SOUTHWEST TO NORTHEAST AT AROUND 25 MPH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT AND THURSDAY IN ASSOCIATION WITH A LOW PRESSURE SYSTEM TRACKING ACROSS ONTARIO. .SPOTTER INFORMATION STATEMENT... DISPATCHERS PLEASE NOTIFY YOUR EMERGENCY MANAGER IMMEDIATELY. SPOTTER ACTIVATION IS POSSIBLE THIS AFTERNOON AND EVENING. LCZ422-423-460-LEZ444-LHZ363-421-422-441>443-462>464-141000- ST. CLAIR RIVER-DETROIT RIVER-LAKE ST. CLAIR- MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI- LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF SHORE- OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER SAGINAW BAY-INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI- PORT AUSTIN TO HARBOR BEACH MI-HARBOR BEACH TO PORT SANILAC MI- PORT SANILAC TO PORT HURON MI- LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE- LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE- LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE- 440 AM EDT SAT AUG 13 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE HURON AND LAKE ST CLAIR. .DAY ONE...TODAY AND TONIGHT THERE IS A GOOD CHANCE OF THUNDERSTORMS THROUGH THIS EVENING...WITH A SLIGHT CHANCE FOR THUNDERSTORMS OVERNIGHT. THERE IS A SLIGHT RISK FOR SEVERE WEATHER..WITH DAMAGING WIND GUSTS TO 50 KNOTS AND LARGE HAIL TO ONE INCH IN DIAMETER THE MAIN THREATS. STORM MOTION WILL BE FROM SOUTHWEST TO NORTHEAST AT 20 TO 25 KNOTS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SMALL CRAFT ADVISORIES MAY BE NEEDED LATE SUNDAY INTO SUNDAY NIGHT FOR PORTIONS OF THE LAKE HURON NEARSHORE WATERS. THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT AND THURSDAY IN ASSOCIATION WITH A LOW PRESSURE SYSTEM TRACKING ACROSS ONTARIO. .SPOTTER INFORMATION STATEMENT... DISPATCHERS PLEASE NOTIFY YOUR EMERGENCY MANAGER IMMEDIATELY. SPOTTER ACTIVATION IS POSSIBLE THIS AFTERNOON AND EVENING. LHZ361-362-141000- LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT BEYOND 5 NM OFF SHORE- LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND 5NM OFF SHORE- 440 AM EDT SAT AUG 13 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE HURON. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS TODAY...WITH A SLIGHT CHANCE FOR A THUNDERSTORM OVERNIGHT. SEVERE WEATHER IS NOT EXPECTED WITH THESE STORMS AS THEY TRACK FROM SOUTHWEST TO NORTHEAST AT 20 TO 25 KNOTS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT AND THURSDAY IN ASSOCIATION WITH A LOW PRESSURE SYSTEM TRACKING ACROSS ONTARIO. .SPOTTER INFORMATION STATEMENT...SPOTTER ACTIVATION IS NOT ANTICIPATED. HLO YOU CAN OBTAIN YOUR LATEST NATIONAL WEATHER SERVICE FORECASTS ONLINE AT WWW.WEATHER.GOV/DETROIT (ALL LOWER CASE).
In the hours before
Local storm report, Aug 13, 6:56 PM EDT, 1 hour 22 minutes before
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</html>Local storm report, Aug 13, 6:58 PM EDT, 1 hour 20 minutes before
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</html>Special weather statement, Aug 13, 7:12 PM EDT, 1 hour 6 minutes before
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</html>Special weather statement, Aug 13, 7:24 PM EDT, 54 minutes before
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</html>Local storm report, Aug 13, 7:31 PM EDT, 47 minutes before
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</html>Special weather statement, Aug 13, 7:42 PM EDT, 36 minutes before
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</html>The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 8:21 PM EDT | Special Marine Warning | DTX | 60 min | |
| Aug 13, 8:41 PM EDT | Special Marine Warning | DTX | 40 min | |
| Aug 13, 11:28 PM EDT | Areal Flood Advisory | DTX | Huron | 4 hr |
Nearby
Severe Thunderstorm Warnings in Michigan, 2011Every severe thunderstorm warning in 2011
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.