Alert archive / Michigan / Tornado Warnings in 2003

Tornado Warning 8, NWS Detroit, MI

July 21, 2003Monroe County, Michigan

NWS Detroit, MI issued this tornado warning at Jul 21, 2003, 2:38 AM EDT for Monroe County, Michigan. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 21, 2003, 2:38 AM EDT (06:38 UTC)
Expired: Jul 21, 2003, 3:45 AM EDT
In force: 67 min
Issued by: NWS Detroit, MI
Area: Counties, with a storm outline in the text

County Monroe County, MI

The radar

The Detroit radar (KDTX), 91 km from the middle of the area, began a volume at 06:42 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 00:00Z, 6.6 hours before the alert went out and 94 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1227 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDTX 210638
TORDTX
MIC115-210745-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
238 AM EDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* TORNADO WARNING FOR...
  MONROE COUNTY IN SOUTHEAST MICHIGAN

* UNTIL 345 AM EDT

* AT 237 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
  SOUTHWEST OF PETERSBURG...OR 13 MILES EAST OF ADRIAN...MOVING EAST
  AT 25 MPH. 

* THE TORNADO IS EXPECTED TO BE NEAR...
  PETERSBURG AT 245 AM EDT
  DUNDEE AT 255 AM EDT
  IDA AT 305 AM EDT

IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IN A HOME OR
BUSINESS IS AN INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE. AVOID
WINDOWS.

LAT...LON 4195 8375 4177 8372 4179 8351 4198 8346

$$

SF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 12:50 AM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	55 min
Jul 21, 1:03 AM EDT	Special Marine Warning	DTX		57 min
Jul 21, 2:48 AM EDT	Special Marine Warning	DTX		57 min
Jul 21, 3:12 AM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	78 min
Jul 21, 3:12 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Lapeer	63 min
Jul 21, 3:34 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	56 min
Jul 21, 3:47 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	88 min
Jul 21, 3:52 PM EDT	Severe Thunderstorm Warning	DTX	Macomb	68 min
Jul 21, 4:28 PM EDT	Tornado Warning	DTX	Oakland	62 min
Jul 21, 4:56 PM EDT	Special Marine Warning	DTX		64 min
Jul 21, 5:04 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Washtenaw	56 min
Jul 21, 5:16 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	44 min
Jul 21, 5:44 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	61 min
Jul 21, 5:47 PM EDT	Special Marine Warning	DTX		73 min

Nearby

Tornado Warnings in Michigan, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.