Alert archive / Maryland / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 124, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2010, 2:53 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 41 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
- Jul 29, 2010, 2:53 PM EDT (18:53 UTC)
- Expired
- Jul 29, 2010, 3:34 PM EDT
- In force
- 41 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 12 km from the middle of the area, began a volume at 18:55 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 29, 11:54 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 6.9 hours before the alert went out and 89 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
- 1121 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 948 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
019
WUUS51 KPHI 291853
SVRPHI
DEC001-005-MDC011-035-041-292030-
/O.NEW.KPHI.SV.W.0124.100729T1853Z-100729T2030Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
253 PM EDT THU JUL 29 2010
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...
NORTHEASTERN TALBOT COUNTY IN EASTERN MARYLAND...
CENTRAL QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
SUSSEX COUNTY IN SOUTHERN DELAWARE...
THIS INCLUDES THE CITY OF GEORGETOWN...
* UNTIL 430 PM EDT
* AT 251 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR JUMPTOWN...OR 9
MILES SOUTHEAST OF CENTERVILLE...AND MOVING EAST AT 35 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
GREENSBORO AND DENTON AROUND 305 PM EDT...
ANDREWSVILLE AROUND 320 PM EDT...
HARRINGTON AROUND 325 PM EDT...
MILFORD AROUND 340 PM EDT...
SLAUGHTER BEACH AROUND 350 PM EDT...
SLAUGHTER BEACH AROUND 355 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
THURSDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY.
&&
LAT...LON 3849 7547 3865 7572 3875 7584 3890 7609
3913 7594 3899 7531 3893 7530 3883 7521
3879 7513 3881 7509 3880 7507 3846 7503
3844 7505 3844 7516
TIME...MOT...LOC 1853Z 279DEG 29KT 3897 7591
$$
NIERENBERG2 follow-up statements
370
WWUS51 KPHI 291926
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
326 PM EDT THU JUL 29 2010
MDC035-041-291936-
/O.CAN.KPHI.SV.W.0124.000000T0000Z-100729T2030Z/
QUEEN ANNE'S MD-TALBOT MD-
326 PM EDT THU JUL 29 2010
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN TALBOT AND
CENTRAL QUEEN ANNE'S COUNTIES IS CANCELLED...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
THURSDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY.
LAT...LON 3849 7547 3865 7572 3867 7574 3868 7575
3875 7584 3894 7573 3895 7531 3893 7530
3883 7521 3879 7513 3881 7509 3880 7507
3846 7503 3844 7505 3844 7516
TIME...MOT...LOC 1926Z 279DEG 29KT 3893 7557
$$
DEC001-005-MDC011-292030-
/O.CON.KPHI.SV.W.0124.000000T0000Z-100729T2030Z/
KENT DE-CAROLINE MD-SUSSEX DE-
326 PM EDT THU JUL 29 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SUSSEX...SOUTHEASTERN CAROLINE AND SOUTHERN KENT COUNTIES...
AT 325 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR
HARRINGTON...OR 16 MILES SOUTH OF DOVER...MOVING EAST AT 35 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
HOUSTON BY 335 PM EDT...
MILFORD BY 340 PM EDT...
7 MILES NORTH OF ELLENDALE BY 345 PM EDT...
SLAUGHTER BEACH BY 350 PM EDT...
8 MILES NORTH OF MILTON BY 355 PM EDT...
6 MILES NORTH OF LEWES BY 410 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
THURSDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY.
&&
LAT...LON 3849 7547 3865 7572 3867 7574 3868 7575
3875 7584 3894 7573 3895 7531 3893 7530
3883 7521 3879 7513 3881 7509 3880 7507
3846 7503 3844 7505 3844 7516
TIME...MOT...LOC 1926Z 279DEG 29KT 3893 7557
$$
NIERENBERG934
WWUS51 KPHI 291934
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
334 PM EDT THU JUL 29 2010
DEC001-005-MDC011-291944-
/O.CAN.KPHI.SV.W.0124.000000T0000Z-100729T2030Z/
KENT DE-CAROLINE MD-SUSSEX DE-
334 PM EDT THU JUL 29 2010
...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX...SOUTHEASTERN CAROLINE
AND SOUTHERN KENT COUNTIES IS CANCELLED...
THE STORM THAT PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER
SEVERE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
THURSDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY.
LAT...LON 3849 7547 3865 7572 3867 7574 3868 7575
3875 7584 3894 7573 3895 7531 3893 7530
3883 7521 3879 7513 3881 7509 3880 7507
3846 7503 3844 7505 3844 7516
TIME...MOT...LOC 1934Z 279DEG 29KT 3892 7549
$$
NIERENBERGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 1:25 PM EDT | Special Weather Statement | PHI | Caroline, Kent, Queen Anne's, Talbot | 95 min |
| Jul 29, 1:50 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 85 min |
| Jul 29, 1:20 PM EDT | Special Weather Statement | PHI | Sussex | 55 min |
| Jul 29, 1:39 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 34 min |
| Jul 29, 2:28 PM EDT | Special Weather Statement | PHI | Kent, New Castle, Sussex | 92 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2010Severe Thunderstorm Warnings in Delaware, 2010Every severe thunderstorm warning 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.