Alert archive / Michigan / Tornado Warnings in 2001

Tornado Warning 4, NWS Gaylord, MI

September 9, 2001Crawford County, Michigan

NWS Gaylord, MI issued this tornado warning at Sep 9, 2001, 5:41 PM EDT for Crawford County, Michigan. It was in force for 34 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
Sep 9, 2001, 5:41 PM EDT (21:41 UTC)
Expired
Sep 9, 2001, 6:15 PM EDT
In force
34 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Crawford County, MI

The radar

The NCL Michigan radar (KAPX), 26 km from the middle of the area, began a volume at 21:45 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

Alpena, MI (KAPX), launched 12:00Z, 9.7 hours before the alert went out and 179 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, Alpena, MI at 12:00Z on 2001-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 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, Alpena, MI at 12:00Z on 2001-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
9 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
501 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
23 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.

499 
WFUS53 KAPX 092142
TORAPN
MIC039-092215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
541 PM EDT SUN SEP 9 2001

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* TORNADO WARNING FOR...
  CRAWFORD COUNTY IN NORTHERN LOWER MICHIGAN

* UNTIL 615 PM EDT

* AT 535 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A DEVELOPING TORNADO 5 MILES NORTHWEST OF ROSCOMMON...MOVING       
  NORTHEAST AT 30 MPH.

* THE STORM PRODUCING THE TORNADO WILL REACH...
  8 MILES SOUTHEAST OF HARTWICK PINES STATE PARK AROUND 600 PM EDT

IF YOU ARE IN THE PATH OF THIS TORNADO...TAKE COVER IN A BASEMENT OR
AN INTERIOR ROOM ON THE LOWEST FLOOR. VEHICLES AND MOBILE HOMES
SHOULD BE ABANDONED FOR STURDIER SHELTER.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 5:52 PM EDTSevere Thunderstorm WarningAPXEmmet38 min

Nearby

Tornado Warnings in Michigan, 2001Every tornado warning in 2001Tornadoes in 2001

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.