Here ya go counsellor, a real storm. Derecho of 13, July 2004 as it crosses
the Ohio River and moves into Northern Kentucky. Severe thunderstorm
warnings were already in place for heavy rain, frequent lightning, hail
(golf ball size) and winds to 90MPH. You can see the action here as it bows
out right over the river, the storm continued into southern Kentucky where
it caused more damage but Louisville and extreme southern Indiana were hit
the hardest.

http://www.crh.noaa.gov/images/lmk/E...-animation.gif





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On Oct 9, 4:44 am, "Michael" wrote:

Here ya go counsellor, a real storm:

Derecho of 13, July 2004 as it crosses the Ohio River and moves into
Northern Kentucky.

Severe thunderstorm warnings were already in place for heavy rain, frequent
lightning, hail and winds to 90MPH.

You can see the action here as it bows out right over the river, the storm
continued into southern Kentucky where it caused more damage but
Louisville and extreme southern Indiana were hit the hardest.

Well there's a surprise, I have actually learned something. Now all
you need to do is take note of my corrections to your grammar. (Or
presentation, rather. It wasn't that bad for a non native.)

July 4, 1969............."The Ohio Fireworks Derecho"....MI, OH, PA,
WV

Jun 29 20:04 Jul 6 13:17

July 4, 1977............."The Independence Day Derecho of 1977"....ND,
MN, WI, MI, OH

Jul 1 03:24 Jul 8 04:39

July 4-5, 1980.........."The 'More Trees Down' Derecho"....NE, IA, MO,
IL, WI, IN, MI, OH, PA, WV, VA, MD

Jun 28 09:02 Jul 5 07:27

July 4-5, 1999.........."The Boundary Waters-Canadian Derecho"....ND,
MN, ON, QB, NH, VT, ME

Jun 28 21:37 Jul 6 11:57

July 1995 Derecho Series Overview.......Montana to New England July
12-13, 1995......"The Right Turn Derecho"....MT, ND, MN, WI, MI, ON,
OH, PA, WV

July 14-15, 1995......"The Ontario-Adirondacks Derecho"....MI, ON, NY,
VT, NH, MA, CT, RI

Jul 12 10:49 Jul 19 11:10

Sept. 7, 1998..........."The Syracuse Derecho of Labor Day
1998"....NY, PA, VT, MA, NH

Sept. 7, 1998..........."The New York City Derecho of Labor Day
1998"....MI, OH, WV, PA, NJ, NY, CT

Sep 3 03:50 Sep 11 04:49

Serial Derecho Events

April 9, 1991............"The West Virginia Derecho of 1991"....AR,TN,
MS, AL, KY, IN, OH, WV, VA, MD, PA

Apr 7 06:45 Apr 14 19:38

March 12-13, 1993.."The Superstorm Subtropical Derecho"....FL, Cuba

Mar 8 09:46 Mar 15 04:16

Southern Plains Derecho Events May 4-5, 1989.........."The Texas
Derecho of 1989"....TX, OK, LA

Apr 28 20:46 May 5 11:46

May 27-28, 2001......"The People Chaser Derecho"....KS, OK, TX

May 23 02:46 May 29 22:09

Some Other Significant Derecho Events

June 7, 1982.............."The Kansas City Derecho of 1982"....KS, MO,
IL

Jun 6 15:59 Jun 14 18:06

July 19, 1983............."The I-94 Derecho"....ND, MN, IA, WI, MI,
IL, IN

Jul 17 02:50 Jul 24 23:27

May 17, 1986............"The Texas Boaters' Derecho".....TX

May 17 01:00 May 23 20:45

July 28-29, 1986......."The Supercell Transition Derecho"....IA, MO,
IL

Jul 28 15:34 Aug 5 18:36

July 7-8, 1991............"The Southern Great Lakes Derecho of
1991"....SD, IA, MN, WI, MI, IN, OH, ON, NY, PA

Jul 5 02:50 Jul 11 19:06

May 30-31, 1998......."The Southern Great Lakes Derecho of
1998"....MN, IA, WI, MI, ON, NY

May 23 16:49 May 31 10:53

July 22, 2003............"The Mid-South Derecho of 2003"....AR, TN,
MS, AL, GA, SC

Jul 21 07:01 Jul 29 06:53

http://www.spc.noaa.gov/misc/AbtDere...rechofacts.htm

Lunar phases: http://sunearth.gsfc.nasa.gov/eclips...hases1901.html

July 4-5, 1999."The Boundary Waters-Canadian Derecho".ND, MN, ON, QB,
NH, VT, ME

Time of phase: 28th Jun 21:37.

Storm name: 02L Basin: NAT Start date: 03.07.1999 End date:
03.07.1999??? Maximum sustained wind: 30 knots

Storm name: BEATRIZ Basin:NEP Start date: 09.07.1999 End date:
16.07.1999 Maximum sustained wind: 105 knots.

A super-cyclone!

So the harmonic (or whatever this thing is caused by) has been
switched back 4 hours from 21: 37 to somewhere in the region of 17:37.
Which is meaningless except that the 37 minutes take the spell out to
where things are unstable for some inexplicable reason.

July 1995 Derecho Series Overview.Montana to New England July 12-13,
1995."The Right Turn Derecho".MT, ND, MN, WI, MI, ON, OH, PA, WV

July 14-15, 1995."The Ontario-Adirondacks Derecho".MI, ON, NY, VT, NH,
MA, CT, RI

Time of phase: 12th July 10:49.

Sept. 7, 1998."The Syracuse Derecho of Labor Day 1998".NY, PA, VT, MA,
NH

Sept. 7, 1998."The New York City Derecho of Labor Day 1998".MI, OH,
WV, PA, NJ, NY, CT

Time of phase: 3rd Sept 03:50.

Storm name: 07W Basin: NWP Start date: 02.09.1998 End date:
04.09.1998. Maximum sustained wind: 30 knots.

Storm name: JAVIER Basin: NEP Start date: 07.09.1998 End date:
11.09.1998. Maximum sustained wind: 45 knots.

Storm name: FRANCES Basin: NAT Start date: 08.09.1998 End date:
12.09.1998. Maximum sustained wind: 55 knots.

No super cyclones.

May 27-28, 2001."The People Chaser Derecho".KS, OK, TX

Time of phase: 23rd May 02:46.

Storm name: 01A Basin: NI Start date: 21.05.2001 End date: 28.05.2001.
Maximum sustained wind: 115 knots.

Another super-cyclone! This threw the spell from 02:46 to 22:46. (And
from the 46 minutes, unstable spell too.)

May 30-31, 1998."The Southern Great Lakes Derecho of 1998".MN, IA, WI,
MI, ON, NY

Time of phase: 23rd May 16:49.

Storm name: 02A Basin: NI Start date: 28.05.1998 End date: 29.05.1998.
Maximum sustained wind: 35 knots.

Not a super-cyclone and the spells of 16:46 and 10:53 are very similar
(10 +6, where the rule is that spells where the times of the phases
are some 6 hours different are substantially the same spell. Thus: 6 =
12 = 18 = 24 and 1 = 7 = 13 etc.)

July 22, 2003."The Mid-South Derecho of 2003".AR, TN, MS, AL, GA, SC

Time of phase: 21st July 07:01.

Koni 08W NWP 15-Jul 22-Jul 65 Kn

Danny 05L NAT 16-Jul 20-Jul 65 Kn

Imbudo 09W NWP 16-Jul 24-Jul 09-May 85 Kn

Felicia 06E NEP 18-Jul 23-Jul 14-Feb??? -

- 06L NAT 19-Jul 21-Jul 30-Jan??? -

- 07L NAT 25-Jul 26-Jul 30 -

You'd have to verify these, my records have screwed up somehow, (Me
playing office worker with them, no doubt.) No super-cyclones, though
there were a lot of tropical cyclones extant at the time.

The MetO doesn't archive anything before summer 1995 (as far as I can
tell) so finding details for all the derechos given will be a little
more difficult.

http://www.spc.noaa.gov/misc/AbtDere...rechofacts.htm

Lunar phases: http://sunearth.gsfc.nasa.gov/eclips...hases1901.html

http://www.metoffice.gov.uk/weather/...ification.html

How about that then?

It appears (I stress the word appears) that is the time of the phase
is somewhere near 04:00, 10:00, 16:00 and 20:00 and there is no super-
cyclonic activity, there is a strong likelihood of a derecho occurring
in the US&A.

If the time of the phase is around 02:00, 08:00, 14:00 or 20:00 and
there is a super-cyclone, then again there is a strong likelihood of a
drencho occurring in the US&A.

Well, that's my take on it. Time will tell.