Alert archive / Michigan / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 21, NWS Detroit, MI

May 15, 2007Saint Clair County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at May 15, 2007, 5:48 PM EDT for Saint Clair County, Michigan. It was in force for 36 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 15, 2007, 5:48 PM EDT (21:48 UTC)
Expired
May 15, 2007, 6:24 PM EDT
In force
36 min
Issued by
NWS Detroit, MI
Area
Counties, with a storm outline in the text

County Saint Clair County, MI

The radar

The Detroit radar (KDTX), 71 km from the middle of the area, began a volume at 21:50 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.

What was reported inside it

TimeReportWhereRemark
May 15, 6:07 PM EDTTSTM WND DMG5 W Port Huron, MITWO LIMBS DOWNED. SIX INCHES IN DIAMETER AND 2-3 FEET IN LENGTH.
May 15, 6:10 PM EDTHAIL 0.75Smiths Creek, MI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 15, 1:53 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.8 hours before the alert went out and 67 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 2007-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2007-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1711 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KDTX 152148
SVRDTX
MIC147-152245-
/O.NEW.KDTX.SV.W.0021.070515T2148Z-070515T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
548 PM EDT TUE MAY 15 2007

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ST. CLAIR COUNTY IN SOUTHEAST MICHIGAN

* UNTIL 645 PM EDT

* AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING UP TO ONE INCH DIAMETER 
  HAIL...AND DAMAGING WINDS UP TO 70 MPH.  THIS STORM WAS LOCATED 9
  MILES NORTHWEST OF ADAIR...OR ABOUT 18 MILES NORTH OF MOUNT
  CLEMENS...AND MOVING NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SMITHS CREEK BY 600 PM EDT...
  WADHAMS...MARYSVILLE AND 6 MILES SOUTHEAST OF RUBY BY 610 PM EDT...
  PORT HURON AND NORTH STREET BY 615 PM EDT...
  7 MILES SOUTHEAST OF LAKEPORT AND 8 MILES SOUTHEAST OF LAKEPORT
  STATE PARK BY 620 PM EDT...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 4291 8284 4290 8274 4275 8274 4275 8247
      4298 8243 4317 8251

$$

SF / WAG
2 follow-up statements
000 
WWUS53 KDTX 152203
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
603 PM EDT TUE MAY 15 2007

MIC147-152245-
/O.CON.KDTX.SV.W.0021.000000T0000Z-070515T2245Z/
ST. CLAIR MI-
603 PM EDT TUE MAY 15 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR ST. CLAIR COUNTY...

AT 558 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING UP TO ONE INCH DIAMETER 
HAIL...AND DAMAGING WINDS UP TO 70 MPH.  THIS STORM WAS LOCATED NEAR
SMITHS CREEK...OR ABOUT 13 MILES SOUTHWEST OF PORT HURON...MOVING
NORTHEAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WADHAMS...MARYSVILLE AND 7 MILES SOUTHEAST OF RUBY BY 610 PM EDT...
  6 MILES SOUTHEAST OF NORTH STREET BY 615 PM EDT...
  PORT HURON BY 620 PM EDT...

SEVERE THUNDERSTORM WATCH NUMBER 275 REMAINS IN EFFECT UNTIL 10 PM.

LAT...LON 4291 8284 4290 8274 4275 8274 4275 8247
      4298 8243 4317 8251

$$
000 
WWUS53 KDTX 152224
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
624 PM EDT TUE MAY 15 2007

MIC147-152234-
/O.CAN.KDTX.SV.W.0021.000000T0000Z-070515T2245Z/
ST. CLAIR MI-
624 PM EDT TUE MAY 15 2007

...THE SEVERE THUNDERSTORM WARNING FOR ST. CLAIR COUNTY IS
CANCELLED...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE SEVERE THUNDERSTORM
THAT PROMPTED THE WARNING HAD EXITED THE COUNTY. THUS...THE WARNING 
HAS BEEN CANCELLED.

SEVERE THUNDERSTORM WATCH NUMBER 275 REMAINS IN EFFECT UNTIL 10 PM.

LAT...LON 4291 8284 4290 8274 4275 8274 4275 8247
      4298 8243 4317 8251

$$

WAG

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 2:50 PM EDTSevere Thunderstorm WarningDTXLenawee81 min
May 15, 3:04 PM EDTSpecial Marine WarningDTX86 min
May 15, 3:13 PM EDTSevere Thunderstorm WarningDTXWashtenaw63 min
May 15, 3:16 PM EDTSevere Thunderstorm WarningDTXBay29 min
May 15, 3:29 PM EDTSevere Thunderstorm WarningDTXWayne91 min
May 15, 3:32 PM EDTSpecial Marine WarningDTX93 min
May 15, 3:52 PM EDTSevere Thunderstorm WarningDTXHuron, Tuscola53 min
May 15, 3:52 PM EDTSevere Thunderstorm WarningDTXMacomb, Oakland83 min
May 15, 4:16 PM EDTSpecial Marine WarningDTX89 min
May 15, 4:19 PM EDTSpecial Marine WarningDTX116 min
May 15, 4:23 PM EDTTornado WarningDTXHuron30 min
May 15, 4:26 PM EDTSpecial Marine WarningDTX45 min
May 15, 4:35 PM EDTSevere Thunderstorm WarningDTXSaint Clair85 min
May 15, 4:56 PM EDTSevere Thunderstorm WarningDTXSanilac39 min
May 15, 5:21 PM EDTSevere Thunderstorm WarningDTXMacomb, Oakland39 min
May 15, 6:11 PM EDTSpecial Marine WarningDTX19 min
May 15, 6:20 PM EDTSevere Thunderstorm WarningDTXLivingston, Washtenaw71 min
May 15, 6:21 PM EDTSevere Thunderstorm WarningDTXOakland84 min
May 15, 6:47 PM EDTSpecial Marine WarningDTX58 min
May 15, 6:55 PM EDTSevere Thunderstorm WarningDTXGenesee, Shiawassee80 min
May 15, 7:01 PM EDTSevere Thunderstorm WarningDTXMacomb68 min
May 15, 7:11 PM EDTSpecial Marine WarningDTX35 min
May 15, 7:11 PM EDTSevere Thunderstorm WarningDTXLapeer65 min
May 15, 7:38 PM EDTSevere Thunderstorm WarningDTXSaint Clair46 min
May 15, 7:43 PM EDTTornado WarningDTXShiawassee24 min
May 15, 7:54 PM EDTSpecial Marine WarningDTX44 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2007Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.