Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 4, NWS Gaylord, MI

April 18, 2002Emmet County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Apr 18, 2002, 10:23 AM EDT for Emmet County, Michigan. It was in force for 52 min. 1 report 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
Apr 18, 2002, 10:23 AM EDT (14:23 UTC)
Expired
Apr 18, 2002, 11:15 AM EDT
In force
52 min
Issued by
NWS Gaylord, MI
Area
Counties, with a storm outline in the text

County Emmet County, MI

The radar

The NCL Michigan radar (KAPX), 65 km from the middle of the area, began a volume at 14:22 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
Apr 18, 10:40 AM EDTHail 0.75Petoskey, MI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 2.4 hours before the alert went out and 197 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 2002-04-18Temperature 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, Alpena, MI at 12:00Z on 2002-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2534 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
243 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 KAPX 181423
SVRAPN
MIC047-181515-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
1023 AM EDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EMMET COUNTY IN NORTHWEST LOWER MICHIGAN

* UNTIL 1115 AM EDT

* AT 1017 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER PETOSKEY...MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL REACH...
  ALANSON AROUND 1030 AM EDT
  BRUTUS AROUND 1035 AM EDT
  PELLSTON AROUND 1040 AM EDT

REMAIN INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. THIS
STORM IS CAPABLE OF PRODUCING WIND GUSTS BETWEEN 60 AND 80 MPH ALONG
WITH DIME SIZED HAIL. WINDS THIS HIGH CAN DOWN TREES AND POWER LINES.

LAT...LON 4556 8472 4545 8474 4533 8493 4537 8498
          4540 8492 4547 8508 4576 8472

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 9:40 AM EDTSevere Thunderstorm WarningAPXCharlevoix50 min
Apr 18, 10:04 AM EDTSevere Thunderstorm WarningAPXBenzie, Manistee26 min
Apr 18, 10:16 AM EDTSpecial Marine WarningAPX59 min
Apr 18, 10:16 AM EDTSpecial Marine WarningAPX59 min
Apr 18, 10:18 AM EDTSevere Thunderstorm WarningAPXGrand Traverse, Wexford42 min
Apr 18, 10:24 AM EDTSevere Thunderstorm WarningAPXGrand Traverse, Wexford36 min
Apr 18, 10:47 AM EDTSevere Thunderstorm WarningAPXAntrim, Charlevoix, Kalkaska, Missaukee43 min
Apr 18, 10:57 AM EDTSevere Thunderstorm WarningAPXCrawford, Otsego48 min
Apr 18, 11:10 AM EDTSpecial Marine WarningAPX95 min
Apr 18, 11:21 AM EDTSevere Thunderstorm WarningAPXMontmorency, Oscoda39 min
Apr 18, 11:54 AM EDTSpecial Marine WarningAPX51 min
Apr 18, 1:07 PM EDTSpecial Marine WarningAPX38 min
Apr 18, 3:35 PM EDTSevere Thunderstorm WarningAPXKalkaska40 min
Apr 18, 3:51 PM EDTSevere Thunderstorm WarningAPXCrawford39 min
Apr 18, 4:15 PM EDTSevere Thunderstorm WarningAPXOtsego45 min
Apr 18, 4:21 PM EDTSevere Thunderstorm WarningAPXMontmorency39 min
Apr 18, 4:54 PM EDTSevere Thunderstorm WarningAPXAlpena36 min
Apr 18, 4:56 PM EDTSevere Thunderstorm WarningAPXCheboygan, Otsego49 min
Apr 18, 5:25 PM EDTSpecial Marine WarningAPX80 min
Apr 18, 5:25 PM EDTSevere Thunderstorm WarningAPXPresque Isle35 min
Apr 18, 6:51 PM EDTSpecial Marine WarningAPX54 min
Apr 18, 7:10 PM EDTSpecial Marine WarningAPX80 min
Apr 18, 7:10 PM EDTSpecial Marine WarningAPX80 min
Apr 18, 7:43 PM EDTSevere Thunderstorm WarningAPXBenzie, Manistee47 min
Apr 18, 7:53 PM EDTSpecial Marine WarningAPX82 min
Apr 18, 7:53 PM EDTSpecial Marine WarningAPX82 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2002Every severe thunderstorm warning in 2002

Sources

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