Alert archive / Michigan / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 15, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at May 20, 2013, 6:43 PM EDT for Lapeer County, Tuscola County, Michigan. It was in force for 77 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
- May 20, 2013, 6:43 PM EDT (22:43 UTC)
- Expired
- May 20, 2013, 8:00 PM EDT
- In force
- 77 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Lapeer County, MI, Tuscola County, MI
The radar
The Detroit radar (KDTX), 67 km from the middle of the area, began a volume at 22:46 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 |
|---|---|---|---|
| May 20, 12:58 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 10.7 hours before the alert went out and 64 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
- 650 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 1054 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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 May 20, 6:43 PM EDT, 0 minutes earlier.
Area forecast discussion, May 20, 6:43 PM EDT, 0 minutes before
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</html>Hazardous weather outlook, May 20, 4:27 AM EDT, 14 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 427 AM EDT MON MAY 20 2013 MIZ047>049-053>055-060>063-068>070-075-076-082-083-210830- MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER- ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE- 427 AM EDT MON MAY 20 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST MICHIGAN. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT FOR ALL OF SOUTHEAST MICHIGAN. DAMAGING WIND GUSTS OVER 60 MPH AND 1 INCH HAIL WILL BE THE PRIMARY THREATS ALTHOUGH AN ISOLATED TORNADO WILL BE POSSIBLE AS WELL. STORM MOTION WILL BE TO THE NORTHEAST AT 25 MPH. HEAVY RAINFALL WILL ALSO BE POSSIBLE WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SEVERAL ROUNDS OF SHOWERS AND THUNDERSTORMS ARE EXPECTED TO OCCUR OVER SOUTHEAST MICHIGAN TUESDAY THROUGH THURSDAY. SOME OF THESE STORMS COULD BECOME STRONG TO SEVERE TUESDAY THROUGH WEDNESDAY. AT THIS TIME IT APPEARS THE GREATEST POTENTIAL FOR SEVERE STORMS WILL BE ON TUESDAY. LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE DURING THIS TIME PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. LCZ422-423-460-LEZ444-LHZ361>363-421-422-441>443-462>464-210830- 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- 427 AM EDT MON MAY 20 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE HURON AND LAKE ST CLAIR. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT ACROSS THE CENTRAL GREAT LAKES. DAMAGING WIND GUSTS OVER 50 KNOTS AND 1 INCH HAIL WILL BE THE PRIMARY THREATS ALTHOUGH AN ISOLATED TORNADO WILL BE POSSIBLE AS WELL. STORM MOTION WILL BE TO THE NORTHEAST AT 20 KNOTS. HEAVY RAINFALL WILL ALSO BE POSSIBLE WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SEVERAL ROUNDS OF SHOWERS AND THUNDERSTORMS ARE EXPECTED TO OCCUR TUESDAY THROUGH THURSDAY. SOME OF THESE STORMS COULD BECOME STRONG TO SEVERE TUESDAY AND WEDNESDAY. AT THIS TIME IT APPEARS THE GREATEST POTENTIAL FOR SEVERE STORMS WILL BE ON TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. DRK 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, May 20, 4:08 PM EDT, 2 hours 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 408 PM EDT MON MAY 20 2013 MIZ047-202115- MIDLAND- 408 PM EDT MON MAY 20 2013 ...SIGNIFICANT WEATHER ADVISORY... AT 404 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES NORTH OF COLEMAN TO 23 MILES SOUTHWEST OF COLEMAN...MOVING NORTHEAST AT 40 MPH. ONE HALF INCH DIAMETER HAIL...WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING...BRIEF MODERATE DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. * THUNDERSTORMS WILL BE NEAR... COLEMAN BY 425 PM EDT... OIL CITY BY 430 PM EDT... EDENVILLE BY 445 PM EDT... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. MANN
Special weather statement, May 20, 4:45 PM EDT, 1 hour 58 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 445 PM EDT MON MAY 20 2013 MIZ047-048-053-202145- BAY-MIDLAND-SAGINAW- 445 PM EDT MON MAY 20 2013 ...SIGNIFICANT WEATHER ADVISORY... AT 443 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 14 MILES NORTHWEST OF PINCONNING TO 27 MILES SOUTHWEST OF SANFORD...MOVING EAST AT 30 MPH. ONE HALF INCH DIAMETER HAIL...WINDS UP TO 50 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING...BRIEF MODERATE DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. * THUNDERSTORMS WILL BE NEAR... BENTLEY BY 450 PM EDT... MIDLAND BY 510 PM EDT... MERRILL BY 515 PM EDT... PINCONNING BY 520 PM EDT... LINWOOD AND FREELAND BY 535 PM EDT... KAWKAWLIN AND BAY CITY BY 545 PM EDT... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. MANN
Special weather statement, May 20, 5:38 PM EDT, 1 hour 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 538 PM EDT MON MAY 20 2013 MIZ049-054-202230- HURON-TUSCOLA- 538 PM EDT MON MAY 20 2013 ...SIGNIFICANT WEATHER ADVISORY... AT 533 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF DEVELOPING THUNDERSTORMS ALONG A GUST FRONT EXTENDING FROM 13 MILES NORTH OF CASEVILLE TO 7 MILES SOUTHWEST OF CASEVILLE TO 9 MILES SOUTHWEST OF REESE...MOVING EAST AT 30 MPH. WINDS GREATER THAN 40 MPH ASSOCIATED WITH A WELL DEFINED GUST FRONT...ARE POSSIBLE WITH THESE STORMS. * THUNDERSTORMS WILL BE NEAR... UNIONVILLE AND FAIRGROVE BY 545 PM EDT... PIGEON BY 550 PM EDT... OWENDALE AND ELKTON BY 600 PM EDT... CARO BY 605 PM EDT... PORT AUSTIN AND GAGETOWN BY 610 PM EDT... KINDE BY 615 PM EDT... CASS CITY AND BAD AXE BY 620 PM EDT... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. SF
Local storm report, May 20, 6:22 PM EDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
622 PM EDT MON MAY 20 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0530 PM TSTM WND GST 14 NE AU GRES 44.20N 83.50W
05/20/2013 M38.00 MPH LHZ349 MI BUOY
BUOY REPORT FROM GSLM4
0540 PM TSTM WND GST 11 NNW BAY PARK 43.80N 83.70W
05/20/2013 M58.00 MPH LHZ422 MI BUOY
49 MPH SUSTAINED WINDS FROM 510PM TO 540PM WITH PEAK GUST
AT 540PM.
0550 PM TSTM WND DMG 2 WNW SHIELDS 43.43N 84.12W
05/20/2013 SAGINAW MI 911 CALL CENTER
POWER LINES DOWN.
0552 PM TSTM WND DMG 4 ENE RHODES 43.93N 84.10W
05/20/2013 BAY MI 911 CALL CENTER
BARN BLOWN DOWN. RADAR ESTIMATED TIME.
0556 PM TSTM WND DMG SANFORD 43.68N 84.38W
05/20/2013 MIDLAND MI 911 CALL CENTER
POWER LINES AND TREES DOWN. RADAR ESTIMATED TIME.
0559 PM TSTM WND DMG 2 WNW SAGINAW 43.43N 83.99W
05/20/2013 SAGINAW MI 911 CALL CENTER
TREES DOWN.
&&
SESLocal storm report, May 20, 6:38 PM EDT, 5 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 |
|---|---|---|---|---|
| May 20, 4:54 PM EDT | Severe Thunderstorm Warning | DTX | Midland | 66 min |
| May 20, 5:03 PM EDT | Special Marine Warning | DTX | 102 min | |
| May 20, 5:14 PM EDT | Special Marine Warning | DTX | 91 min | |
| May 20, 5:16 PM EDT | Severe Thunderstorm Warning | DTX | Bay, Saginaw | 59 min |
| May 20, 5:48 PM EDT | Severe Thunderstorm Warning | DTX | Huron, Tuscola | 57 min |
| May 20, 5:52 PM EDT | Severe Thunderstorm Warning | DTX | Shiawassee | 53 min |
| May 20, 5:53 PM EDT | Special Marine Warning | DTX | 2 hr | |
| May 20, 6:13 PM EDT | Severe Thunderstorm Warning | DTX | Genesee, Saginaw | 77 min |
| May 20, 6:23 PM EDT | Severe Thunderstorm Warning | DTX | Livingston | 67 min |
| May 20, 6:36 PM EDT | Special Marine Warning | DTX | 114 min | |
| May 20, 6:41 PM EDT | Severe Thunderstorm Warning | DTX | Huron, Sanilac | 79 min |
| May 20, 6:53 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 67 min |
| May 20, 7:27 PM EDT | Special Marine Warning | DTX | 2 hr | |
| May 20, 7:43 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair, Sanilac | 62 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.