Alert archive / Maryland / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 29, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 31, 2008, 1:36 PM EDT for 4 counties in Maryland; Kent County, Sussex County, Delaware. It was in force for 54 min. 2 reports 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
- May 31, 2008, 1:36 PM EDT (17:36 UTC)
- Expired
- May 31, 2008, 2:30 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 46 km from the middle of the area, began a volume at 17:39 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
| Time | Report | Where | Remark |
|---|---|---|---|
| May 31, 2:25 PM EDT | HAIL 0.75 | Denton, MD | PENNY SIZE HAIL WAS REPORTED IN DENTON. |
| May 31, 2:30 PM EDT | HAIL 0.88 | Denton, MD | NICKEL SIZE HAIL WAS REPORTED IN DENTON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 31, 10:20 AM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 5.6 hours before the alert went out and 110 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.
- Mixed-layer CAPE
- 395 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 690 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 311736
SVRPHI
DEC001-005-MDC011-029-035-041-311830-
/O.NEW.KPHI.SV.W.0029.080531T1736Z-080531T1830Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
136 PM EDT SAT MAY 31 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN KENT COUNTY IN CENTRAL DELAWARE...
CAROLINE COUNTY IN EASTERN MARYLAND...
TALBOT COUNTY IN EASTERN MARYLAND...
EXTREME SOUTHWESTERN KENT COUNTY IN NORTHEAST MARYLAND...
SOUTHERN QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...
SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 230 PM EDT
* AT 134 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR CHESTER...OR ABOUT 45 MILES
WEST OF DOVER...AND MOVING EAST AT 52 MPH. THERE WAS ALSO A SECOND
SEVERE THUNDERSTORM MOVING IN BEHIND THE FIRST STORM THAT COULD
ALSO PRODUE DAMAGING WINDS.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
WYE MILLS AND CENTREVILLE BY 150 PM...
STARR...HOPE...QUEEN ANNE AND CARVILLE BY 155 PM...
OAKLAND...JUMPTOWN AND RIDGELY BY 200 PM...
GREENSBORO BY 205 PM...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM SATURDAY AFTERNOON FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEASTERN
PENNSYLVANIA.
LAT...LON 3854 7571 3869 7582 3858 7600 3861 7611
3872 7629 3880 7632 3887 7626 3882 7621
3892 7621 3895 7624 3890 7624 3887 7635
3903 7633 3898 7620 3905 7619 3903 7625
3916 7541 3892 7530 3879 7509 3846 7503
TIME...MOT...LOC 1736Z 267DEG 45KT 3897 7628
$$
RNS1 follow-up statement
000
WWUS51 KPHI 311805
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
205 PM EDT SAT MAY 31 2008
DEC001-005-MDC011-029-035-041-311830-
/O.CON.KPHI.SV.W.0029.000000T0000Z-080531T1830Z/
KENT DE-CAROLINE MD-KENT MD-SUSSEX DE-QUEEN ANNES MD-TALBOT MD-
205 PM EDT SAT MAY 31 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR EASTERN TALBOT...SOUTHERN QUEEN ANNES...SUSSEX...EXTREME
SOUTHWESTERN KENT...CAROLINE AND SOUTHERN KENT COUNTIES...
AT 202 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR GRASONVILLE...OR 40
MILES SOUTHWEST OF DOVER...MOVING EAST AT 49 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
SKIPTON AND WYE MILLS BY 210 PM EDT...
CORDOVA...QUEEN ANNE AND STARR BY 215 PM EDT...
HILLSBORO...GRIFFIN...RIDGELY AND JUMPTOWN BY 220 PM EDT...
DENTON BY 225 PM EDT...
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM EDT SATURDAY AFTERNOON
FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA.
LAT...LON 3864 7559 3869 7582 3868 7608 3882 7621
3892 7621 3895 7624 3890 7625 3894 7628
3890 7632 3890 7633 3887 7635 3903 7633
3898 7620 3903 7617 3905 7620 3916 7541
3892 7530 3882 7519 3879 7509 3847 7504
TIME...MOT...LOC 1805Z 275DEG 43KT 3891 7615
$$
RNSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 2:28 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 47 min |
| May 31, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 64 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2008Severe Thunderstorm Warnings in Delaware, 2008Every severe thunderstorm warning in 2008
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.