Alert archive / Michigan / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 63, NWS Detroit, MI

July 23, 2010Macomb County, Washtenaw County, Wayne County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 23, 2010, 1:48 PM EDT for Macomb County, Washtenaw County, Wayne 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
Jul 23, 2010, 1:48 PM EDT (17:48 UTC)
Expired
Jul 23, 2010, 2:19 PM EDT
In force
31 min
Issued by
NWS Detroit, MI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Macomb County, MI, Washtenaw County, MI, Wayne County, MI

The radar

The Detroit radar (KDTX), 35 km from the middle of the area, began a volume at 17:48 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, 5.8 hours before the alert went out and 36 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.

Skew-T log-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2010-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2736 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2010-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 202 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2736 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
470 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
202 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
1.5
Supercell composite
8.7

Open this sounding in Storm Lab

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 Jul 23, 1:36 PM EDT, 12 minutes earlier.

Area forecast discussion, Jul 23, 1:36 PM EDT, 12 minutes before
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Hazardous weather outlook, Jul 23, 4:25 AM EDT, 9 hours 23 minutes before
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In the hours before

Local storm report, Jul 23, 8:10 AM EDT, 5 hours 38 minutes before
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Local storm report, Jul 23, 8:41 AM EDT, 5 hours 7 minutes before
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Local storm report, Jul 23, 9:23 AM EDT, 4 hours 25 minutes before
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Local storm report, Jul 23, 9:56 AM EDT, 3 hours 52 minutes before
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Special weather statement, Jul 23, 12:46 PM EDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1246 PM EDT FRI JUL 23 2010

MIZ063-068>070-075-076-082-083-231745-
LENAWEE-LIVINGSTON-MACOMB-MONROE-OAKLAND-ST. CLAIR-WASHTENAW-WAYNE-
1246 PM EDT FRI JUL 23 2010

...SPECIAL WEATHER STATEMENT...

AT 1239 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF DEVELOPING THUNDERSTORMS. THE LEADING EDGE OF THE AREA OF
THUNDERSTORMS EXTENDED ALONG A LINE EXTENDING FROM 6 MILES NORTH OF
MOUNT CLEMENS TO 4 MILES EAST OF NOVI TO SALINE TO 12 MILES WEST OF
MANCHESTER...MOVING EAST AT 40 MPH.

WINDS GREATER UP TO 35 MPH... AND OCCASIONAL CLOUD TO GROUND
LIGHTNING ARE POSSIBLE WITH THESE STORMS. BRIEF HEAVY RAINFALL IS
ALSO POSSIBLE WHICH WILL LEAD TO SOME LOCAL PONDING ON WATER ON AREA
ROADWAYS.

* THUNDERSTORMS WILL BE NEAR...
  NEW BALTIMORE AND YPSILANTI BY 1250 PM EDT...
  MOUNT CLEMENS BY 1255 PM EDT...
  WILLIS AND WARREN BY 100 PM EDT...
  MARINE CITY AND DETROIT BY 105 PM EDT...
  TAYLOR AND HARSENS ISLAND BY 110 PM EDT...
  MILAN AND GROSSE POINTE BY 115 PM EDT...
  WYANDOTTE BY 120 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.

RBP

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 22, 8:10 PM EDTFlash Flood WatchDTXBay, Genesee, Huron, Lapeer, Lenawee, Livingston and 11 more7 hr
Jul 22, 9:04 PM EDTSmall Craft AdvisoryDTX7 hr
Jul 23, 1:10 PM EDTSpecial Marine WarningDTX103 min
Jul 23, 1:52 PM EDTAreal Flood AdvisoryDTXMacomb, Oakland, Washtenaw, Wayne2 hr
Jul 23, 4:56 PM EDTHeat AdvisoryDTXLenawee, Livingston, Macomb, Monroe, Oakland, Washtenaw and 1 more3 hr
Jul 23, 5:32 PM EDTSevere Thunderstorm WarningDTXWayne31 min
Jul 23, 5:36 PM EDTSpecial Marine WarningDTX40 min
Jul 23, 5:41 PM EDTSevere Thunderstorm WarningDTXLivingston, Washtenaw48 min
Jul 23, 5:51 PM EDTFlash Flood WarningDTXLivingston, Oakland, Washtenaw, Wayne4 hr
Jul 23, 6:08 PM EDTSevere Thunderstorm WarningDTXWashtenaw39 min
Jul 23, 6:14 PM EDTSevere Thunderstorm WarningDTXWayne55 min
Jul 23, 6:26 PM EDTTornado WarningDTXMonroe, Washtenaw, Wayne40 min
Jul 23, 6:31 PM EDTSevere Thunderstorm WarningDTXLenawee, Washtenaw29 min
Jul 23, 6:38 PM EDTSpecial Marine WarningDTX36 min
Jul 23, 7:44 PM EDTSevere Thunderstorm WarningDTXLenawee35 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2010Every severe thunderstorm warning in 2010

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.