Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 8, NWS Gaylord, MI

April 18, 2002Montmorency County, Oscoda County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Apr 18, 2002, 11:21 AM EDT for Montmorency County, Oscoda County, Michigan. It was in force for 39 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, 11:21 AM EDT (15:21 UTC)
Expired
Apr 18, 2002, 12:00 PM EDT
In force
39 min
Issued by
NWS Gaylord, MI
Area
Counties, with a storm outline in the text

Counties Montmorency County, MI, Oscoda County, MI

The radar

The NCL Michigan radar (KAPX), 55 km from the middle of the area, began a volume at 15:23 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, 11:45 AM EDTThunderstorm Wind 50 EHillman, MISeveral trees and power lines down.

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, 3.4 hours before the alert went out and 138 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 181521
SVRAPN
MIC119-135-181600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
1121 AM EDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MONTMORENCY COUNTY IN NORTHEAST LOWER MICHIGAN
  OSCODA COUNTY IN NORTHEAST LOWER MICHIGAN

* UNTIL NOON EDT

* AT 1118 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 11 MILES SOUTH OF ONAWAY TO 4    
  MILES NORTH OF ROSCOMMON...MOVING EAST AT 55 MPH.

* THE SEVERE THUNDERSTORMS WILL REACH...
  RED OAK AROUND 1130 AM EDT
  LUZERNE AROUND 1135 AM EDT
  MIO...COMINS AROUND 1140 AM EDT
  MCKINLEY AROUND 1150 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 4451 8389 4451 8436 4483 8436 4518 8388

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, 10:23 AM EDTSevere Thunderstorm WarningAPXEmmet52 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, 11:54 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.