Alert archive / Michigan / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 100, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 1, 2011, 2:38 PM EDT for Lenawee 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 1, 2011, 2:38 PM EDT (18:38 UTC)
- Expired
- Aug 1, 2011, 3:09 PM EDT
- In force
- 31 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Lenawee County, MI
The radar
The Detroit radar (KDTX), 102 km from the middle of the area, began a volume at 18:42 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 12:00Z, 6.6 hours before the alert went out and 106 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
- 2432 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 864 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.2
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 1, 12:26 PM EDT, 2 hours 12 minutes earlier.
Area forecast discussion, Aug 1, 12:26 PM EDT, 2 hours 12 minutes before
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</html>Hazardous weather outlook, Aug 1, 4:56 AM EDT, 9 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 456 AM EDT MON AUG 1 2011 MIZ060>063-068>070-075-076-082-083-020900- SHIAWASSEE-GENESEE-LAPEER-ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB- WASHTENAW-WAYNE-LENAWEE-MONROE- 456 AM EDT MON AUG 1 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST MICHIGAN. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TODAY. A FEW OF THESE STORMS MAY BECOME SEVERE. THE BIGGEST THREAT FROM THESE STORMS WILL BE DAMAGING WIND GUSTS TO 70 MPH AND HAIL UP TO ONE INCH IN DIAMETER. STORMS WILL MOVE TO THE SOUTHEAST AT AROUND 30 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE OF THUNDERSTORMS ON TUESDAY...WITH STORMS BECOMING LIKELY TUESDAY NIGHT AS A WEAK AREA OF LOW PRESSURE TRACKS ACROSS THE CENTRAL GREAT LAKES. THERE IS A CHANCE OF SEVERE WEATHER WITH THESE STORMS IN ADDITION TO VERY HEAVY RAINFALL. THUNDERSTORMS WILL AGAIN BE POSSIBLE FRIDAY AND FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY AND TONIGHT AS THE COVERAGE OF SEVERE WEATHER IS NOT EXPECTED TO BE WIDESPREAD. MIZ047>049-053>055-020900- MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC- 456 AM EDT MON AUG 1 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST MICHIGAN. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TODAY...WITH COVERAGE DECREASING DURING THE LATE AFTERNOON. A FEW OF THESE STORMS MAY BECOME SEVERE...ESPECIALLY EARLY IN THE DAY. THE BIGGEST THREAT FROM THESE STORMS WILL BE DAMAGING WIND GUSTS TO 60 MPH AND HAIL UP TO ONE INCH IN DIAMETER. STORMS WILL MOVE TO THE SOUTHEAST AT AROUND 30 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE OF THUNDERSTORMS ON TUESDAY...WITH STORMS LIKELY TUESDAY EVENING AND OVERNIGHT AS A WEAK AREA OF LOW PRESSURE TRACKS ACROSS THE CENTRAL GREAT LAKES. THERE IS A CHANCE OF SEVERE WEATHER WITH THESE STORMS IN ADDITION TO VERY HEAVY RAINFALL. THUNDERSTORMS WILL AGAIN BE POSSIBLE FRIDAY AND FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY AND TONIGHT AS THE COVERAGE OF SEVERE WEATHER IS NOT EXPECTED TO BE WIDESPREAD. LCZ423-460-LEZ444-020900- DETROIT RIVER-LAKE ST. CLAIR- MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI- 456 AM EDT MON AUG 1 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE AND LAKE ST CLAIR. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TODAY. A FEW OF THESE STORMS MAY BECOME SEVERE. THE BIGGEST THREAT FROM THESE STORMS WILL BE DAMAGING WIND GUSTS TO 55 KNOTS AND HAIL UP TO ONE INCH IN DIAMETER. STORMS WILL MOVE TO THE SOUTHEAST AT AROUND 30 KNOTS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE OF THUNDERSTORMS ON TUESDAY...WITH STORMS LIKELY TUESDAY EVENING AND OVERNIGHT AS A WEAK AREA OF LOW PRESSURE TRACKS ACROSS THE CENTRAL GREAT LAKES. THERE IS A CHANCE OF SEVERE WEATHER WITH THESE STORMS IN ADDITION TO VERY HEAVY RAINFALL. THUNDERSTORMS WILL AGAIN BE POSSIBLE FRIDAY AND FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY AND TONIGHT AS THE COVERAGE OF SEVERE WEATHER IS NOT EXPECTED TO BE WIDESPREAD. LHZ421-422-441>443-462>464-020900- 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- 456 AM EDT MON AUG 1 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE HURON. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TODAY...WITH COVERAGE DECREASING DURING THE LATE AFTERNOON. A FEW OF THESE STORMS MAY BECOME SEVERE...ESPECIALLY EARLY IN THE DAY. THE BIGGEST THREAT FROM THESE STORMS WILL BE DAMAGING WIND GUSTS TO 50 KNOTS AND HAIL UP TO ONE INCH IN DIAMETER. STORMS WILL MOVE TO THE SOUTHEAST AT AROUND 30 KNOTS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE OF THUNDERSTORMS ON TUESDAY...WITH STORMS LIKELY TUESDAY EVENING AND OVERNIGHT AS A WEAK AREA OF LOW PRESSURE TRACKS ACROSS THE CENTRAL GREAT LAKES. THERE IS A CHANCE OF SEVERE WEATHER WITH THESE STORMS IN ADDITION TO VERY HEAVY RAINFALL. THUNDERSTORMS WILL AGAIN BE POSSIBLE FRIDAY AND FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY AND TONIGHT AS THE COVERAGE OF SEVERE WEATHER IS NOT EXPECTED TO BE WIDESPREAD. LCZ422-LHZ361>363-020900- ST. CLAIR RIVER- 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- LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF SHORE- 456 AM EDT MON AUG 1 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE HURON AND LAKE ST CLAIR. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE OF THUNDERSTORMS ON TUESDAY...WITH STORMS LIKELY TUESDAY EVENING AND OVERNIGHT AS A WEAK AREA OF LOW PRESSURE TRACKS ACROSS THE CENTRAL GREAT LAKES. THERE IS A CHANCE OF SEVERE WEATHER WITH THESE STORMS IN ADDITION TO VERY HEAVY RAINFALL. THUNDERSTORMS WILL AGAIN BE POSSIBLE FRIDAY AND FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. HLO YOU CAN OBTAIN YOUR LATEST NATIONAL WEATHER SERVICE FORECASTS ONLINE AT WWW.WEATHER.GOV/DETROIT (ALL LOWER CASE).
In the hours before
Special weather statement, Aug 1, 12:40 PM EDT, 1 hour 58 minutes before
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</html>Special weather statement, Aug 1, 1:39 PM EDT, 59 minutes before
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</html>Special weather statement, Aug 1, 2:30 PM EDT, 8 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 1, 3:23 AM EDT | Severe Thunderstorm Warning | DTX | Saginaw | 37 min |
| Aug 1, 3:55 AM EDT | Special Marine Warning | DTX | 96 min | |
| Aug 1, 5:18 AM EDT | Severe Thunderstorm Warning | DTX | Bay, Tuscola | 35 min |
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.