Alert archive / Delaware / Special Weather Statements in 2010
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 17, 2010, 3:21 PM EDT for Sussex County, Delaware. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2010, 3:21 PM EDT (19:21 UTC)
- Expired
- Aug 17, 2010, 4:15 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 22 km from the middle of the area, began a volume at 19:23 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.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.4 hours before the alert went out and 91 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
- 494 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1086 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
785
WWUS81 KPHI 171921
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
321 PM EDT TUE AUG 17 2010
DEZ002>004-172015-
DELAWARE BEACHES DE-INLAND SUSSEX DE-KENT DE-
321 PM EDT TUE AUG 17 2010
...STRONG THUNDERSTORMS WILL AFFECT KENT AND SUSSEX COUNTIES...
AT 313 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS CONTINUE TO FORM AS A SEA BREEZE FRONT MOVES TO
THE WEST. THE LATEST WESTERN EXTENT OF THE STORMS EXTEND ALONG A
LINE FROM 15 MILES NORTHEAST OF GEORGETOWN TO 4 MILES SOUTH OF
GEORGETOWN...MOVING SOUTHEAST AT 15 MPH. THE THUNDERSTORMS WILL BE
NEAR LEWES AROUND 345 PM...DEWEY BEACH...HENLOPEN ACRES AROUND 400
PM...FRANKFORD AND LONG NECK AROUND 415 PM.
HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE EXTREME SOUTHEASTERN
PART OF SUSSEX COUNTY.
LAT...LON 3845 7530 3863 7551 3902 7533 3898 7529
3893 7530 3889 7525 3883 7521 3879 7513
3879 7511 3881 7509 3880 7507 3847 7503
3844 7505
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 12:19 AM EDT | Special Weather Statement | PHI | Monmouth | 41 min |
| Aug 17, 1:29 PM EDT | Special Weather Statement | PHI | Atlantic | 61 min |
| Aug 17, 1:32 PM EDT | Special Marine Warning | PHI | 88 min | |
| Aug 17, 2:42 PM EDT | Special Weather Statement | PHI | Atlantic | 63 min |
| Aug 17, 2:58 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 17, 3:27 PM EDT | Areal Flood Advisory | PHI | Atlantic | 2 hr |
| Aug 17, 3:40 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 17, 3:58 PM EDT | Flash Flood Warning | PHI | Atlantic | 3 hr |
| Aug 16, 9:52 PM EDT | Special Weather Statement | PHI | Chester | 113 min |
| Aug 16, 11:28 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 62 min |
| Aug 17, 1:23 PM EDT | Special Weather Statement | PHI | Sussex | 82 min |
| Aug 17, 2:21 PM EDT | Areal Flood Advisory | PHI | Sussex | 114 min |
| Aug 17, 2:36 PM EDT | Flash Flood Warning | PHI | Sussex | 2 hr |
| Aug 17, 4:23 PM EDT | Special Weather Statement | PHI | Sussex | 112 min |
Nearby
Special Weather Statements in Delaware, 2010Every special weather statement in 2010
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.