Alert archive / Michigan / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 97, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 7, 2013, 10:30 AM EDT for Lenawee County, Michigan. It was in force for 90 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 7, 2013, 10:30 AM EDT (14:30 UTC)
- Expired
- Aug 7, 2013, 12:00 PM EDT
- In force
- 90 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 14:33 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, 2.5 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
- 1279 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.6
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 7, 7:36 AM EDT, 2 hours 54 minutes earlier.
Area forecast discussion, Aug 7, 7:36 AM EDT, 2 hours 54 minutes before
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</html>Hazardous weather outlook, Aug 7, 3:36 AM EDT, 6 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 336 AM EDT WED AUG 7 2013 MIZ047>049-053>055-060>063-068>070-075-076-082-083-080745- MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER- ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE- 336 AM EDT WED AUG 7 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST MICHIGAN. .DAY ONE...TODAY AND TONIGHT NUMEROUS THUNDERSTORMS ARE EXPECTED THROUGHOUT THE DAY TODAY. THERE IS A SLIGHT CHANCE OF SEVERE WEATHER WITH THESE STORMS. WHILE THE MOST PROBABLE TIME PERIOD FOR SEVERE WEATHER WILL BE THIS AFTERNOON AND EVENING /BETWEEN 1 PM AND 8 PM/ SOME OF THE STORMS THIS MORNING WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 60 MPH...ESPECIALLY THOSE THAT OCCUR TO THE NORTH OF THE INTERSTATE 69 CORRIDOR. THE STRONGEST STORMS THIS AFTERNOON WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 70 MPH AND HAIL TO ONE INCH IN DIAMETER AS THEY MOVE TO THE EAST AT 50 MPH. AN ISOLATED TORNADO IS ALSO POSSIBLE. A HUMID AND UNSTABLE AIRMASS HAS LIFTED INTO THE REGION. THIS UNSTABLE AIRMASS COMBINED WITH AN APPROACHING COLD FRONT LATER TODAY WILL TRIGGER THE NUMEROUS THUNDERSTORMS. THE DEGREE OF INSTABILITY COMBINED WITH STRONG WINDS ALOFT WILL LEAD TO THE POTENTIAL FOR SEVERE STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY. SPOTTER ACTIVATION MAY BE NEEDED TODAY. LCZ422-423-460-LEZ444-LHZ361>363-421-422-441>443-462>464-080745- ST. CLAIR RIVER-DETROIT RIVER-LAKE ST. CLAIR- MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI- 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- 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- 336 AM EDT WED AUG 7 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE HURON AND LAKE ST CLAIR. .DAY ONE...TODAY AND TONIGHT NUMEROUS THUNDERSTORMS ARE EXPECTED THROUGHOUT THE DAY TODAY. THERE IS A SLIGHT CHANCE OF SEVERE WEATHER WITH THESE STORMS. WHILE THE MOST PROBABLE TIME PERIOD FOR SEVERE WEATHER WILL BE THIS AFTERNOON AND EVENING /BETWEEN 1 PM AND 8 PM/ SOME OF THE STORMS THIS MORNING WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 KNOTS...ESPECIALLY THOSE THAT OCCUR OVER SAGINAW BAY. THE STRONGEST STORMS THIS AFTERNOON WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 60 KNOTS AND HAIL TO ONE INCH IN DIAMETER AS THEY MOVE TO THE EAST AT 50 MPH. AN ISOLATED TORNADO IS ALSO POSSIBLE. A HUMID AND UNSTABLE AIRMASS HAS LIFTED INTO THE REGION. THIS UNSTABLE AIRMASS COMBINED WITH AN APPROACHING COLD FRONT LATER TODAY WILL TRIGGER THE NUMEROUS THUNDERSTORMS. THE DEGREE OF INSTABILITY COMBINED WITH STRONG WINDS ALOFT WILL LEAD TO THE POTENTIAL FOR SEVERE STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY. SPOTTER ACTIVATION MAY BE NEEDED TODAY. SC 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 7, 7:45 AM EDT, 2 hours 45 minutes before
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</html>Local storm report, Aug 7, 8:16 AM EDT, 2 hours 14 minutes before
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</html>Local storm report, Aug 7, 8:32 AM EDT, 1 hour 58 minutes before
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</html>Special weather statement, Aug 7, 9:53 AM EDT, 37 minutes before
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</html>Special weather statement, Aug 7, 10:19 AM EDT, 11 minutes before
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</html>Special weather statement, Aug 7, 10:26 AM EDT, 4 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 7, 4:43 AM EDT | Special Marine Warning | DTX | 2 hr | |
| Aug 7, 4:56 AM EDT | Severe Thunderstorm Warning | DTX | Bay, Midland, Saginaw | 64 min |
| Aug 7, 6:20 AM EDT | Severe Thunderstorm Warning | DTX | Genesee, Lapeer, Tuscola | 55 min |
| Aug 7, 7:22 AM EDT | Special Marine Warning | DTX | 68 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2013Every severe thunderstorm warning in 2013
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.